# Precision Burst Timer - SMD ## Description Compact surface-mount production variant of the fixed-function, crystal-referenced low-power burst timer. Electrically equivalent to the through-hole version where practical, with selectable interval, duration, carrier frequency, AUTO/TEST mode, ENABLE output, and gated OSC_OUT; no MCU, firmware, PLL, VCO, or programmable logic. ## Project Details - **Owner:** astrostubbs - **Created:** 7/23/2026 - **Last Updated:** 7/25/2026 - **Visibility:** Public - **Copies:** 1 ## Key Components ### D1 — [BAS116-QR](https://www.flux.ai/silicon-yard/bas116-qr.md) - Datasheet URL: https://assets.nexperia.com/documents/data-sheet/BAS116-Q.pdf - Part Type: Diodes - Manufacturer Part Number: BAS116-QR - Manufacturer Name: Nexperia - Role: Selection Isolation - Role Details: Nexperia SOT23 low-leakage diode; verified preliminary candidate—not released BOM **Pins:** - A [pin 1] - K [pin 3] - N.C. [pin 2] ### D10 — [BAS116-QR](https://www.flux.ai/silicon-yard/bas116-qr.md) - Datasheet URL: https://assets.nexperia.com/documents/data-sheet/BAS116-Q.pdf - Part Type: Diodes - Role: Selection Isolation - Manufacturer Part Number: BAS116-QR - Manufacturer Name: Nexperia - Role Details: Nexperia SOT23 low-leakage diode; verified preliminary candidate—not released BOM **Pins:** - A [pin 1] - K [pin 3] - N.C. [pin 2] ### D11 — [BAS116-QR](https://www.flux.ai/silicon-yard/bas116-qr.md) - Manufacturer Name: Nexperia - Part Type: Diodes - Role: Selection Isolation - Role Details: Nexperia SOT23 low-leakage diode; verified preliminary candidate—not released BOM - Datasheet URL: https://assets.nexperia.com/documents/data-sheet/BAS116-Q.pdf - Manufacturer Part Number: BAS116-QR **Pins:** - A [pin 1] - K [pin 3] - N.C. [pin 2] ### D12 — [BAS116-QR](https://www.flux.ai/silicon-yard/bas116-qr.md) - Role: Selection Isolation - Manufacturer Name: Nexperia - Manufacturer Part Number: BAS116-QR - Role Details: Nexperia SOT23 low-leakage diode; verified preliminary candidate—not released BOM - Datasheet URL: https://assets.nexperia.com/documents/data-sheet/BAS116-Q.pdf - Part Type: Diodes **Pins:** - A [pin 1] - K [pin 3] - N.C. [pin 2] ### D13 — [BAS116-QR](https://www.flux.ai/silicon-yard/bas116-qr.md) - Datasheet URL: https://assets.nexperia.com/documents/data-sheet/BAS116-Q.pdf - Part Type: Diodes - Manufacturer Part Number: BAS116-QR - Role: Selection Isolation - Manufacturer Name: Nexperia - Role Details: Nexperia SOT23 low-leakage diode; verified preliminary candidate—not released BOM **Pins:** - A [pin 1] - K [pin 3] - N.C. [pin 2] ### D14 — [BAS116-QR](https://www.flux.ai/silicon-yard/bas116-qr.md) - Role Details: Nexperia SOT23 low-leakage diode; verified preliminary candidate—not released BOM - Role: Selection Isolation - Manufacturer Name: Nexperia - Manufacturer Part Number: BAS116-QR - Datasheet URL: https://assets.nexperia.com/documents/data-sheet/BAS116-Q.pdf - Part Type: Diodes **Pins:** - A [pin 1] - K [pin 3] - N.C. [pin 2] ### D15 — [BAS116-QR](https://www.flux.ai/silicon-yard/bas116-qr.md) - Manufacturer Part Number: BAS116-QR - Datasheet URL: https://assets.nexperia.com/documents/data-sheet/BAS116-Q.pdf - Part Type: Diodes - Role Details: Nexperia SOT23 low-leakage diode; verified preliminary candidate—not released BOM - Role: Selection Isolation - Manufacturer Name: Nexperia **Pins:** - A [pin 1] - K [pin 3] - N.C. [pin 2] ### D2 — [BAS116-QR](https://www.flux.ai/silicon-yard/bas116-qr.md) - Role Details: Nexperia SOT23 low-leakage diode; verified preliminary candidate—not released BOM - Part Type: Diodes - Role: Selection Isolation - Datasheet URL: https://assets.nexperia.com/documents/data-sheet/BAS116-Q.pdf - Manufacturer Part Number: BAS116-QR - Manufacturer Name: Nexperia **Pins:** - A [pin 1] - K [pin 3] - N.C. [pin 2] ### D3 — [BAS116-QR](https://www.flux.ai/silicon-yard/bas116-qr.md) - Role Details: Nexperia SOT23 low-leakage diode; verified preliminary candidate—not released BOM - Manufacturer Name: Nexperia - Role: Selection Isolation - Manufacturer Part Number: BAS116-QR - Part Type: Diodes - Datasheet URL: https://assets.nexperia.com/documents/data-sheet/BAS116-Q.pdf **Pins:** - A [pin 1] - K [pin 3] - N.C. [pin 2] ### D4 — [BAS116-QR](https://www.flux.ai/silicon-yard/bas116-qr.md) - Datasheet URL: https://assets.nexperia.com/documents/data-sheet/BAS116-Q.pdf - Role: Selection Isolation - Part Type: Diodes - Manufacturer Part Number: BAS116-QR - Role Details: Nexperia SOT23 low-leakage diode; verified preliminary candidate—not released BOM - Manufacturer Name: Nexperia **Pins:** - A [pin 1] - K [pin 3] - N.C. [pin 2] ### D5 — [BAS116-QR](https://www.flux.ai/silicon-yard/bas116-qr.md) - Role: Selection Isolation - Manufacturer Name: Nexperia - Manufacturer Part Number: BAS116-QR - Datasheet URL: https://assets.nexperia.com/documents/data-sheet/BAS116-Q.pdf - Part Type: Diodes - Role Details: Nexperia SOT23 low-leakage diode; verified preliminary candidate—not released BOM **Pins:** - A [pin 1] - K [pin 3] - N.C. [pin 2] ### D6 — [BAS116-QR](https://www.flux.ai/silicon-yard/bas116-qr.md) - Datasheet URL: https://assets.nexperia.com/documents/data-sheet/BAS116-Q.pdf - Part Type: Diodes - Role Details: Nexperia SOT23 low-leakage diode; verified preliminary candidate—not released BOM - Manufacturer Part Number: BAS116-QR - Manufacturer Name: Nexperia - Role: Selection Isolation **Pins:** - A [pin 1] - K [pin 3] - N.C. [pin 2] ### D7 — [BAS116-QR](https://www.flux.ai/silicon-yard/bas116-qr.md) - Part Type: Diodes - Datasheet URL: https://assets.nexperia.com/documents/data-sheet/BAS116-Q.pdf - Manufacturer Part Number: BAS116-QR - Role: Selection Isolation - Manufacturer Name: Nexperia - Role Details: Nexperia SOT23 low-leakage diode; verified preliminary candidate—not released BOM **Pins:** - A [pin 1] - K [pin 3] - N.C. [pin 2] ### D8 — [BAS116-QR](https://www.flux.ai/silicon-yard/bas116-qr.md) - Role: Selection Isolation - Role Details: Nexperia SOT23 low-leakage diode; verified preliminary candidate—not released BOM - Manufacturer Name: Nexperia - Manufacturer Part Number: BAS116-QR - Part Type: Diodes - Datasheet URL: https://assets.nexperia.com/documents/data-sheet/BAS116-Q.pdf **Pins:** - A [pin 1] - K [pin 3] - N.C. [pin 2] ### D9 — [BAS116-QR](https://www.flux.ai/silicon-yard/bas116-qr.md) - Role: Selection Isolation - Manufacturer Part Number: BAS116-QR - Part Type: Diodes - Role Details: Nexperia SOT23 low-leakage diode; verified preliminary candidate—not released BOM - Datasheet URL: https://assets.nexperia.com/documents/data-sheet/BAS116-Q.pdf - Manufacturer Name: Nexperia **Pins:** - A [pin 1] - K [pin 3] - N.C. [pin 2] ### J1 — [Pin Header 02x01 2.54mm Vertical](https://www.flux.ai/adrian95/pin-header-02x01-254mm-vertical~evn.md) - License: https://creativecommons.org/licenses/by/4.0/ - Role: Power Input - Part Type: Connector - Role Details: THT-compatible vertical 2-pin header; pin 1 VCC_AON/BAT+, pin 2 GND **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] ### J2 — [Pin Header 01x03 2.54mm Vertical](https://www.flux.ai/adrian95/pin-header-01x03-254mm-vertical~cp4.md) - Part Type: Connector - Role Details: THT-compatible vertical 3-pin header; pin 1 ENABLE, pin 2 OSC_OUT, pin 3 GND - License: https://creativecommons.org/licenses/by/4.0/ - Role: Logic Output **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] ### Q1 — [BC807](https://www.flux.ai/kicad-part-library/bc807~fze.md) - Role Details: SOT23 PNP 800 mA candidate; sizing conditional on final switched-load budget; verified preliminary candidate—not released BOM - Role: High-Side Pass - Manufacturer Part Number: BC807 - Package or Case Code: SOT-23 - Datasheet URL: https://www.onsemi.com/pub/Collateral/BC808-D.pdf **Pins:** - B [pin 1] - C [pin 3] - E [pin 2] ### Q12 — [MMBT2222ALT3G](https://www.flux.ai/adrian95/mmbt2222alt3g~vum.md) - Role Details: onsemi SOT23 NPN 600 mA; verified preliminary candidate—not released BOM - Part Type: Transistor - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.onsemi.com/pdf/datasheet/mmbt2222lt1-d.pdf - Manufacturer Part Number: MMBT2222ALT3G - Manufacturer Name: onsemi - Role: Control/Isolation **Pins:** - B [pin 1] - C [pin 3] - E [pin 2] ### Q13 — [MMBT2222ALT3G](https://www.flux.ai/adrian95/mmbt2222alt3g~vum.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Transistor - Manufacturer Part Number: MMBT2222ALT3G - Datasheet URL: https://www.onsemi.com/pdf/datasheet/mmbt2222lt1-d.pdf - Manufacturer Name: onsemi - Role Details: onsemi SOT23 NPN 600 mA; verified preliminary candidate—not released BOM - Role: Control/Isolation **Pins:** - B [pin 1] - C [pin 3] - E [pin 2] ### Q14 — [DMP2035U-7](https://www.flux.ai/lcsc/dmp2035u-7~up6l.md) - Role: Reverse Polarity Protection - Package or Case Code: SOT-23-3_L2.9-W1.6-P1.90-LS2.8-BR - LCSC Part Number: C110499 - JLCPCB Part Class: Extended Part - Manufacturer Part Number: DMP2035U-7 - Manufacturer Name: DIODES(美台) - Product Info Url: https://lcsc.com/product-detail/MOSFET_DIODES_DMP2035U-7_DMP2035U-7_C110499.html - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2412251000_Diodes-Incorporated-DMP2035U-7_C110499.pdf - Part Type: MOSFETs - Role Details: DMP2035U-7 P-channel ideal-diode stage. Provisional active/transient design bound 100mA pending prototype measurement; at 100mA and 62mΩ maximum RDS(on) at VGS=-1.8V, estimated drop <=6.2mV and dissipation <=0.62mW. -3.6A device rating provides large margin. Include specified 1uA maximum off leakage in standby budget. **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### SW1 — [GDH08S04](https://www.flux.ai/jecstronic/gdh08s04~bpd.md) - Part Type: Switch - Role Details: TE 8-position SMD SPST; mechanics/labels pending; verified preliminary candidate—not released BOM - Role: Interval Selector - Manufacturer Part Number: GDH08S04 - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: TE Connectivity - Datasheet URL: https://www.snapeda.com/parts/GDH08S04/TE%20Connectivity/datasheet/ **Pins:** - ~ [pin 3] - ~ [pin 1] - ~ [pin 10] - ~ [pin 5] - ~ [pin 4] - ~ [pin 13] - ~ [pin 11] - ~ [pin 7] - ~ [pin 15] - ~ [pin 8] - ~ [pin 14] - ~ [pin 2] - ~ [pin 12] - ~ [pin 9] - ~ [pin 6] - ~ [pin 16] ### SW2 — [GDH08S04](https://www.flux.ai/jecstronic/gdh08s04~bpd.md) - Manufacturer Name: TE Connectivity - Datasheet URL: https://www.snapeda.com/parts/GDH08S04/TE%20Connectivity/datasheet/ - Role Details: TE 8-position SMD SPST; mechanics/labels pending; verified preliminary candidate—not released BOM - License: https://creativecommons.org/licenses/by/4.0/ - Role: Duration Selector - Manufacturer Part Number: GDH08S04 - Part Type: Switch **Pins:** - ~ [pin 3] - ~ [pin 1] - ~ [pin 10] - ~ [pin 5] - ~ [pin 4] - ~ [pin 13] - ~ [pin 11] - ~ [pin 7] - ~ [pin 15] - ~ [pin 8] - ~ [pin 14] - ~ [pin 2] - ~ [pin 12] - ~ [pin 9] - ~ [pin 6] - ~ [pin 16] ### SW3 — [GDH08S04](https://www.flux.ai/jecstronic/gdh08s04~bpd.md) - Part Type: Switch - Role Details: TE 8-position SMD SPST half of verified 8+4 fallback; verified preliminary candidate—not released BOM - Role: Carrier Selector - Manufacturer Part Number: GDH08S04 - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: TE Connectivity - Datasheet URL: https://www.snapeda.com/parts/GDH08S04/TE%20Connectivity/datasheet/ **Pins:** - ~ [pin 3] - ~ [pin 1] - ~ [pin 10] - ~ [pin 5] - ~ [pin 4] - ~ [pin 13] - ~ [pin 11] - ~ [pin 7] - ~ [pin 15] - ~ [pin 8] - ~ [pin 14] - ~ [pin 2] - ~ [pin 12] - ~ [pin 9] - ~ [pin 6] - ~ [pin 16] ### SW4 — [CFS-0400TB](https://www.flux.ai/adrian95/cfs-0400tb~u58.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.nidec-copal-electronics.com/e/catalog/switch/cfs.pdf - Part Type: Switch - Role Details: Nidec 4-position SMD SPST half of verified 8+4 fallback; verified preliminary candidate—not released BOM - Package or Case Code: CFS0400TB - Manufacturer Part Number: CFS-0400TB - Manufacturer Name: Nidec Copal - Role: Carrier Selector **Pins:** - COM_1 [pin A1] - COM_2 [pin A2] - COM_3 [pin A3] - COM_4 [pin A4] - NO_1 [pin B1] - NO_2 [pin B2] - NO_3 [pin B3] - NO_4 [pin B4] ### SW5 — [JS102011JCQN](https://www.flux.ai/adrian95/js102011jcqn~oia.md) - Manufacturer Part Number: JS102011JCQN - Datasheet URL: https://www.ckswitches.com/media/1422/js.pdf - Part Type: Switch - Manufacturer Name: C&K - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: AUTO/TEST: C&K JS102011JCQN maintained non-shorting SPDT On-On, vertical/top actuator, J-bend SMD, 0.3A at 6VDC; sufficient as isolated dry-contact hardware selector when override paths are separately gated; verified preliminary candidate—not released BOM - Role: Switching **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] ### U1 — [74HCU04D-Q100J](https://www.flux.ai/lcsc/74hcu04d-q100j~0j1z.md) - Role: Oscillator - Manufacturer Part Number: 74HCU04D-Q100J - Product Info Url: https://lcsc.com/product-detail/presales_Nexperia-74HCU04D-Q100J_C547847.html - JLCPCB Part Class: Extended Part - Datasheet URL: https://assets.lcsc.com/datasheet/szlcsc/Download-ISO9001-Certification.pdf - Package or Case Code: SO-14_L8.9-W3.9-P1.27-LS6.0-BL - Manufacturer Name: Nexperia(安世) - LCSC Part Number: C547847 - Role Details: Nexperia SO14 2–6 V unbuffered inverter; verified preliminary candidate—not released BOM; oscillator current is major standby risk - Part Type: Gates **Pins:** - 1A [pin 1] - 1Y [pin 2] - 2A [pin 3] - 2Y [pin 4] - 3A [pin 5] - 3Y [pin 6] - 4A [pin 9] - 4Y [pin 8] - 5A [pin 11] - 5Y [pin 10] - 6A [pin 13] - 6Y [pin 12] - GND [pin 7] - VCC [pin 14] ### U10 — [74HC193D,653](https://www.flux.ai/lcsc/74hc193dc653~06hf.md) - Manufacturer Part Number: 74HC193D,653 - Package or Case Code: SO-16_L10.0-W4.0-P1.27-LS6.2-BL - Product Info Url: https://lcsc.com/product-detail/presales_Nexperia-74HC193D-653_C546676.html - LCSC Part Number: C546676 - Role Details: Nexperia SO16 2–6 V preset counter; 4.194304 MHz margin at 2.0 V not proven; verified preliminary candidate—not released BOM - Role: Carrier Divider - JLCPCB Part Class: Extended Part - Manufacturer Name: Nexperia(安世) - Part Type: Counters / Dividers - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2407241036_Nexperia-74HC193D-653_C546676.pdf **Pins:** - #PL [pin 11] - #TCD [pin 13] - #TCU [pin 12] - CPD [pin 4] - CPU [pin 5] - D0 [pin 15] - D1 [pin 1] - D2 [pin 10] - D3 [pin 9] - GND [pin 8] - MR [pin 14] - Q0 [pin 3] - Q1 [pin 2] - Q2 [pin 6] - Q3 [pin 7] - VCC [pin 16] ### U11 — [74HC08D,652](https://www.flux.ai/lcsc/74hc08dc652~7i3w.md) - LCSC Part Number: C546511 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_Nexperia-74HC08D-652_C546511.pdf - Part Type: Gates - Role Details: Nexperia SO14 2–6 V quad AND; verified preliminary candidate—not released BOM - Manufacturer Name: Nexperia(安世) - Package or Case Code: SOP-14_L8.6-W3.9-P1.27-LS6.0-BL - JLCPCB Part Class: Extended Part - Product Info Url: https://lcsc.com/product-detail/presales_Nexperia-74HC08D-652_C546511.html - Manufacturer Part Number: 74HC08D,652 - Role: Fixed Logic **Pins:** - 1A [pin 1] - 1B [pin 2] - 1Y [pin 3] - 2A [pin 4] - 2B [pin 5] - 2Y [pin 6] - 3A [pin 9] - 3B [pin 10] - 3Y [pin 8] - 4A [pin 12] - 4B [pin 13] - 4Y [pin 11] - GND [pin 7] - VCC [pin 14] ### U12 — [74HC08D,652](https://www.flux.ai/lcsc/74hc08dc652~7i3w.md) - Product Info Url: https://lcsc.com/product-detail/presales_Nexperia-74HC08D-652_C546511.html - Manufacturer Part Number: 74HC08D,652 - Role Details: Nexperia SO14 2–6 V quad AND; verified preliminary candidate—not released BOM - Manufacturer Name: Nexperia(安世) - Package or Case Code: SOP-14_L8.6-W3.9-P1.27-LS6.0-BL - JLCPCB Part Class: Extended Part - Role: Fixed Logic - Part Type: Gates - LCSC Part Number: C546511 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_Nexperia-74HC08D-652_C546511.pdf **Pins:** - 1A [pin 1] - 1B [pin 2] - 1Y [pin 3] - 2A [pin 4] - 2B [pin 5] - 2Y [pin 6] - 3A [pin 9] - 3B [pin 10] - 3Y [pin 8] - 4A [pin 12] - 4B [pin 13] - 4Y [pin 11] - GND [pin 7] - VCC [pin 14] ### U13 — [74HC08D,652](https://www.flux.ai/lcsc/74hc08dc652~7i3w.md) - Part Type: Gates - Role Details: Nexperia SO14 2–6 V quad AND; verified preliminary candidate—not released BOM - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_Nexperia-74HC08D-652_C546511.pdf - LCSC Part Number: C546511 - Manufacturer Part Number: 74HC08D,652 - Product Info Url: https://lcsc.com/product-detail/presales_Nexperia-74HC08D-652_C546511.html - Role: Fixed Logic - JLCPCB Part Class: Extended Part - Package or Case Code: SOP-14_L8.6-W3.9-P1.27-LS6.0-BL - Manufacturer Name: Nexperia(安世) **Pins:** - 1A [pin 1] - 1B [pin 2] - 1Y [pin 3] - 2A [pin 4] - 2B [pin 5] - 2Y [pin 6] - 3A [pin 9] - 3B [pin 10] - 3Y [pin 8] - 4A [pin 12] - 4B [pin 13] - 4Y [pin 11] - GND [pin 7] - VCC [pin 14] ### U14 — [74HC08D,652](https://www.flux.ai/lcsc/74hc08dc652~7i3w.md) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_Nexperia-74HC08D-652_C546511.pdf - LCSC Part Number: C546511 - Role: Fixed Logic - Role Details: Nexperia SO14 2–6 V quad AND; verified preliminary candidate—not released BOM - Part Type: Gates - Package or Case Code: SOP-14_L8.6-W3.9-P1.27-LS6.0-BL - Manufacturer Name: Nexperia(安世) - JLCPCB Part Class: Extended Part - Manufacturer Part Number: 74HC08D,652 - Product Info Url: https://lcsc.com/product-detail/presales_Nexperia-74HC08D-652_C546511.html **Pins:** - 1A [pin 1] - 1B [pin 2] - 1Y [pin 3] - 2A [pin 4] - 2B [pin 5] - 2Y [pin 6] - 3A [pin 9] - 3B [pin 10] - 3Y [pin 8] - 4A [pin 12] - 4B [pin 13] - 4Y [pin 11] - GND [pin 7] - VCC [pin 14] ### U15 — [74HC08D,652](https://www.flux.ai/lcsc/74hc08dc652~7i3w.md) - Product Info Url: https://lcsc.com/product-detail/presales_Nexperia-74HC08D-652_C546511.html - Manufacturer Part Number: 74HC08D,652 - Package or Case Code: SOP-14_L8.6-W3.9-P1.27-LS6.0-BL - Role: Fixed Logic - Manufacturer Name: Nexperia(安世) - JLCPCB Part Class: Extended Part - Part Type: Gates - Role Details: Nexperia SO14 2–6 V quad AND; fifth baseline device; verified preliminary candidate—not released BOM - LCSC Part Number: C546511 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_Nexperia-74HC08D-652_C546511.pdf **Pins:** - 1A [pin 1] - 1B [pin 2] - 1Y [pin 3] - 2A [pin 4] - 2B [pin 5] - 2Y [pin 6] - 3A [pin 9] - 3B [pin 10] - 3Y [pin 8] - 4A [pin 12] - 4B [pin 13] - 4Y [pin 11] - GND [pin 7] - VCC [pin 14] ### U18 — [74HC74D-Q100,118](https://www.flux.ai/lcsc/74hc74d-q100c118~24a.md) - Manufacturer Name: Nexperia(安世) - Package or Case Code: SOP-14_L8.6-W3.9-P1.27-LS6.0-BL - Manufacturer Part Number: 74HC74D-Q100,118 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2410010201_Nexperia-74HC74D-Q100-118_C547153.pdf - Role Details: Nexperia SO14 2–6 V dual D flip-flop; verified preliminary candidate—not released BOM - Role: State Latch - Part Type: Flip Flops - JLCPCB Part Class: Extended Part - LCSC Part Number: C547153 - Product Info Url: https://lcsc.com/product-detail/presales_Nexperia-74HC74D-Q100-118_C547153.html **Pins:** - #1Q [pin 6] - #1RD [pin 1] - #1SD [pin 4] - #2Q [pin 8] - #2RD [pin 13] - #2SD [pin 10] - 1CP [pin 3] - 1D [pin 2] - 1Q [pin 5] - 2CP [pin 11] - 2D [pin 12] - 2Q [pin 9] - GND [pin 7] - VCC [pin 14] ### U19 — [74HC74D-Q100,118](https://www.flux.ai/lcsc/74hc74d-q100c118~24a.md) - Manufacturer Part Number: 74HC74D-Q100,118 - Role: Carrier Toggle - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2410010201_Nexperia-74HC74D-Q100-118_C547153.pdf - JLCPCB Part Class: Extended Part - Part Type: Flip Flops - Role Details: Nexperia SO14 2–6 V dual D flip-flop; verified preliminary candidate—not released BOM - LCSC Part Number: C547153 - Product Info Url: https://lcsc.com/product-detail/presales_Nexperia-74HC74D-Q100-118_C547153.html - Manufacturer Name: Nexperia(安世) - Package or Case Code: SOP-14_L8.6-W3.9-P1.27-LS6.0-BL **Pins:** - #1Q [pin 6] - #1RD [pin 1] - #1SD [pin 4] - #2Q [pin 8] - #2RD [pin 13] - #2SD [pin 10] - 1CP [pin 3] - 1D [pin 2] - 1Q [pin 5] - 2CP [pin 11] - 2D [pin 12] - 2Q [pin 9] - GND [pin 7] - VCC [pin 14] ### U2 — [74HC4040D,652](https://www.flux.ai/lcsc/74hc4040dc652~0ck3.md) - JLCPCB Part Class: Extended Part - Role: Clock Divider - Role Details: Nexperia SO16 2–6 V reference divider; verified preliminary candidate—not released BOM - LCSC Part Number: C546968 - Product Info Url: https://lcsc.com/product-detail/presales_Nexperia-74HC4040D-652_C546968.html - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_Nexperia-74HC4040D-652_C546968.pdf - Part Type: Counters / Dividers - Manufacturer Name: Nexperia(安世) - Manufacturer Part Number: 74HC4040D,652 - Package or Case Code: SO-16_L10.0-W4.0-P1.27-LS6.2-BL **Pins:** - #CP [pin 10] - 3 [pin 5] - GND [pin 8] - MR [pin 11] - Q0 [pin 9] - Q1 [pin 7] - Q10 [pin 15] - Q11 [pin 1] - Q2 [pin 6] - Q4 [pin 3] - Q5 [pin 2] - Q6 [pin 4] - Q7 [pin 13] - Q8 [pin 12] - Q9 [pin 14] - VCC [pin 16] ### U3 — [74HC4040D,652](https://www.flux.ai/lcsc/74hc4040dc652~0ck3.md) - Manufacturer Name: Nexperia(安世) - Role Details: Nexperia SO16 2–6 V reference divider; verified preliminary candidate—not released BOM - Manufacturer Part Number: 74HC4040D,652 - Role: Clock Divider - Package or Case Code: SO-16_L10.0-W4.0-P1.27-LS6.2-BL - Part Type: Counters / Dividers - LCSC Part Number: C546968 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_Nexperia-74HC4040D-652_C546968.pdf - Product Info Url: https://lcsc.com/product-detail/presales_Nexperia-74HC4040D-652_C546968.html - JLCPCB Part Class: Extended Part **Pins:** - #CP [pin 10] - 3 [pin 5] - GND [pin 8] - MR [pin 11] - Q0 [pin 9] - Q1 [pin 7] - Q10 [pin 15] - Q11 [pin 1] - Q2 [pin 6] - Q4 [pin 3] - Q5 [pin 2] - Q6 [pin 4] - Q7 [pin 13] - Q8 [pin 12] - Q9 [pin 14] - VCC [pin 16] ### U4 — [74HC4017D,653](https://www.flux.ai/lcsc/74hc4017dc653~36kq.md) - Package or Case Code: SOIC-16_L10.8-W4.5-P1.27-LS6.8-BL - Product Info Url: https://lcsc.com/product-detail/74-Series_Nexperia_74HC4017D-653_74HC4017D-653_C148206.html - Role Details: Nexperia SO16 2–6 V decade counter; verified preliminary candidate—not released BOM - Manufacturer Name: Nexperia(安世) - Role: Interval Counter - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2407241026_Nexperia-74HC4017D-653_C148206.pdf - Part Type: 74 Series - JLCPCB Part Class: Extended Part - Manufacturer Part Number: 74HC4017D,653 - LCSC Part Number: C148206 **Pins:** - ~{CP1} [pin 13] - CP0 [pin 14] - GND [pin 8] - MR [pin 15] - Q0 [pin 3] - Q1 [pin 2] - Q2 [pin 4] - Q3 [pin 7] - Q4 [pin 10] - Q5 [pin 1] - Q5-9 [pin 12] - Q6 [pin 5] - Q7 [pin 6] - Q8 [pin 9] - Q9 [pin 11] - VCC [pin 16] ### U5 — [74HC4017D,653](https://www.flux.ai/lcsc/74hc4017dc653~36kq.md) - Package or Case Code: SOIC-16_L10.8-W4.5-P1.27-LS6.8-BL - Product Info Url: https://lcsc.com/product-detail/74-Series_Nexperia_74HC4017D-653_74HC4017D-653_C148206.html - Manufacturer Name: Nexperia(安世) - Role: Interval Counter - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2407241026_Nexperia-74HC4017D-653_C148206.pdf - Role Details: Nexperia SO16 2–6 V decade counter; verified preliminary candidate—not released BOM - Part Type: 74 Series - JLCPCB Part Class: Extended Part - LCSC Part Number: C148206 - Manufacturer Part Number: 74HC4017D,653 **Pins:** - ~{CP1} [pin 13] - CP0 [pin 14] - GND [pin 8] - MR [pin 15] - Q0 [pin 3] - Q1 [pin 2] - Q2 [pin 4] - Q3 [pin 7] - Q4 [pin 10] - Q5 [pin 1] - Q5-9 [pin 12] - Q6 [pin 5] - Q7 [pin 6] - Q8 [pin 9] - Q9 [pin 11] - VCC [pin 16] ### U6 — [74HC4017D,653](https://www.flux.ai/lcsc/74hc4017dc653~36kq.md) - Manufacturer Name: Nexperia(安世) - Product Info Url: https://lcsc.com/product-detail/74-Series_Nexperia_74HC4017D-653_74HC4017D-653_C148206.html - Role Details: Nexperia SO16 2–6 V decade counter; verified preliminary candidate—not released BOM - Package or Case Code: SOIC-16_L10.8-W4.5-P1.27-LS6.8-BL - Manufacturer Part Number: 74HC4017D,653 - LCSC Part Number: C148206 - JLCPCB Part Class: Extended Part - Part Type: 74 Series - Role: Duration Counter - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2407241026_Nexperia-74HC4017D-653_C148206.pdf **Pins:** - ~{CP1} [pin 13] - CP0 [pin 14] - GND [pin 8] - MR [pin 15] - Q0 [pin 3] - Q1 [pin 2] - Q2 [pin 4] - Q3 [pin 7] - Q4 [pin 10] - Q5 [pin 1] - Q5-9 [pin 12] - Q6 [pin 5] - Q7 [pin 6] - Q8 [pin 9] - Q9 [pin 11] - VCC [pin 16] ### U7 — [74HC4017D,653](https://www.flux.ai/lcsc/74hc4017dc653~36kq.md) - Manufacturer Name: Nexperia(安世) - Package or Case Code: SOIC-16_L10.8-W4.5-P1.27-LS6.8-BL - Role: Duration Counter - Product Info Url: https://lcsc.com/product-detail/74-Series_Nexperia_74HC4017D-653_74HC4017D-653_C148206.html - JLCPCB Part Class: Extended Part - LCSC Part Number: C148206 - Manufacturer Part Number: 74HC4017D,653 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2407241026_Nexperia-74HC4017D-653_C148206.pdf - Part Type: 74 Series - Role Details: Nexperia SO16 2–6 V decade counter; verified preliminary candidate—not released BOM **Pins:** - ~{CP1} [pin 13] - CP0 [pin 14] - GND [pin 8] - MR [pin 15] - Q0 [pin 3] - Q1 [pin 2] - Q2 [pin 4] - Q3 [pin 7] - Q4 [pin 10] - Q5 [pin 1] - Q5-9 [pin 12] - Q6 [pin 5] - Q7 [pin 6] - Q8 [pin 9] - Q9 [pin 11] - VCC [pin 16] ### U8 — [74HC193D,653](https://www.flux.ai/lcsc/74hc193dc653~06hf.md) - Product Info Url: https://lcsc.com/product-detail/presales_Nexperia-74HC193D-653_C546676.html - LCSC Part Number: C546676 - Package or Case Code: SO-16_L10.0-W4.0-P1.27-LS6.2-BL - Manufacturer Part Number: 74HC193D,653 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2407241036_Nexperia-74HC193D-653_C546676.pdf - Part Type: Counters / Dividers - Manufacturer Name: Nexperia(安世) - JLCPCB Part Class: Extended Part - Role: Carrier Divider - Role Details: Nexperia SO16 2–6 V preset counter; 4.194304 MHz margin at 2.0 V not proven; verified preliminary candidate—not released BOM **Pins:** - #PL [pin 11] - #TCD [pin 13] - #TCU [pin 12] - CPD [pin 4] - CPU [pin 5] - D0 [pin 15] - D1 [pin 1] - D2 [pin 10] - D3 [pin 9] - GND [pin 8] - MR [pin 14] - Q0 [pin 3] - Q1 [pin 2] - Q2 [pin 6] - Q3 [pin 7] - VCC [pin 16] ### U9 — [74HC193D,653](https://www.flux.ai/lcsc/74hc193dc653~06hf.md) - Product Info Url: https://lcsc.com/product-detail/presales_Nexperia-74HC193D-653_C546676.html - LCSC Part Number: C546676 - Package or Case Code: SO-16_L10.0-W4.0-P1.27-LS6.2-BL - Manufacturer Part Number: 74HC193D,653 - Part Type: Counters / Dividers - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2407241036_Nexperia-74HC193D-653_C546676.pdf - Role: Carrier Divider - Manufacturer Name: Nexperia(安世) - JLCPCB Part Class: Extended Part - Role Details: Nexperia SO16 2–6 V preset counter; 4.194304 MHz margin at 2.0 V not proven; verified preliminary candidate—not released BOM **Pins:** - #PL [pin 11] - #TCD [pin 13] - #TCU [pin 12] - CPD [pin 4] - CPU [pin 5] - D0 [pin 15] - D1 [pin 1] - D2 [pin 10] - D3 [pin 9] - GND [pin 8] - MR [pin 14] - Q0 [pin 3] - Q1 [pin 2] - Q2 [pin 6] - Q3 [pin 7] - VCC [pin 16] ### Y1 — ECS-42-12-7SX-TR - Manufacturer Name: ECS Inc. - Mount: Surface Mount - Manufacturer Part Number: ECS-42-12-7SX-TR - Frequency: 4.194304MHz - Part Type: Crystals and Oscillators - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/user-uploaded/fef68e5b3cdd3a8d72a9e8d3139be37d2115f327d46f6506f8e08d72dae61838.pdf - Package or Case Code: CRYSTAL-SMD **Pins:** - XTAL1 [pin 1] - XTAL2 [pin 2] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/astrostubbs/precision-burst-timer-smd](https://www.flux.ai/astrostubbs/precision-burst-timer-smd).* --- *Generated from [https://www.flux.ai/astrostubbs/precision-burst-timer-smd](https://www.flux.ai/astrostubbs/precision-burst-timer-smd)*