Part Audit Review
Thought for 5 sec
I’ll audit the part metadata, locate and attach the official TI datasheet if needed, then verify the symbol pins and footprint against it and report any discrepancies.
Worked for 3 mins 28 sec
Created a project doc
Part Audit Report
Part Audit Report
Scope
Audit of TMUX6234PWR metadata, schematic symbol, terminal descriptions, and PCB footprint against the official Texas Instruments TMUX6234 datasheet (Rev. C, July 2024).
Official datasheet: https://www.ti.com/lit/ds/symlink/tmux6234.pdf
Stored Datasheet URL: https://www.ti.com/lit/gpn/tmux6234
Current Part Information
Package and Footprint Cross-Check
The MPN suffix PWR identifies the PW 20-pin TSSOP option supplied on tape and reel. Datasheet nominal body size is 6.50 mm × 4.40 mm, maximum height 1.2 mm, with 0.65 mm lead pitch.
TI land-pattern example PW0020A:
- 20 rectangular pads
- Pad size: 0.45 mm × 1.50 mm
- Pitch: 0.65 mm
- Opposing row span / land-pattern dimension: 5.8 mm
- No exposed thermal pad for PW/TSSOP
Audit complete. The official TI datasheet URL was already set, so no property update was needed; all 20 pin numbers/names and the TSSOP-20 footprint match the datasheet.
Flagged issues: incorrect “Electromechanical Components” and “Logic / AND” classifications, unspecified terminal electrical types/descriptions, missing explicit package metadata, and an unsupported “latch-up immunity” claim. Full results and key specifications are in the Part Audit Report.
Fix all metadata issues
Fix terminal metadata
Correct part classification
Validate decoupling guidance
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Part Audit Report
Scope
Audit of TMUX6234PWR metadata, schematic symbol, terminal descriptions, and PCB footprint against the official Texas Instruments TMUX6234 datasheet (Rev. C, July 2024).
Official datasheet: https://www.ti.com/lit/ds/symlink/tmux6234.pdf
Stored Datasheet URL: https://www.ti.com/lit/gpn/tmux6234
Current Part Information
Table
| Field | Current value | Audit result |
|---|---|---|
| MPN | TMUX6234PWR | Correct |
| Manufacturer | Texas Instruments | Correct |
| Description | 36-V, low-RON, 2:1 (SPDT), four-channel precision switches with latch-up immunity and 1.8-V logic | Mostly correct; datasheet title does not explicitly claim latch-up immunity for TMUX6234 |
| Terminal/pad count | 20 | Correct |
| Orderable package | PW, TSSOP-20 | Footprint geometry matches PW0020A, but an explicit package property was not visible in the returned part properties |
| Lifecycle | Active | Correct |
| Datasheet URL | https://www.ti.com/lit/gpn/tmux6234 | Already present and official; no update required |
| Designator prefix | IC | Acceptable |
| Part Type property | Electromechanical Components | Incorrect |
| Indexed part classification | Integrated Circuits / Logic | Broadly IC, but “Logic” is inaccurate for an analog switch/multiplexer |
| IC type / logic function | Logic / AND | Incorrect |
Package and Footprint Cross-Check
The MPN suffix PWR identifies the PW 20-pin TSSOP option supplied on tape and reel. Datasheet nominal body size is 6.50 mm × 4.40 mm, maximum height 1.2 mm, with 0.65 mm lead pitch.
TI land-pattern example PW0020A:
- 20 rectangular pads
- Pad size: 0.45 mm × 1.50 mm
- Pitch: 0.65 mm
- Opposing row span / land-pattern dimension: 5.8 mm
- No exposed thermal pad for PW/TSSOP
The Flux footprint has 20 rectangular pads arranged as two rows of ten. Interpreting the returned coordinates in board-scale units, it uses approximately 0.45 mm × 1.475 mm pads, 0.65 mm pitch, and 5.876 mm row-to-row center spacing. This is consistent with TI’s recommended PW0020A land pattern; the 1.475 mm pad length is effectively the recommended 1.50 mm with minor rounding.
Footprint result: PASS. No missing or extra pad, no exposed pad, and the pitch/pad geometry are consistent with the TSSOP-20 package.
Pinout Cross-Check
Table
| Pin | Datasheet name | Current symbol | Function | Result |
|---|---|---|---|---|
| 1 | SEL1 | SEL1 | Logic control input 1, internal pull-down | Correct |
| 2 | S1A | S1A | Bidirectional analog source 1A | Correct |
| 3 | D1 | D1 | Bidirectional analog drain 1 | Correct |
| 4 | S1B | S1B | Bidirectional analog source 1B | Correct |
| 5 | VSS | VSS | Negative supply; ground for single-supply use | Correct |
| 6 | GND | GND | 0-V reference | Correct |
| 7 | S2B | S2B | Bidirectional analog source 2B | Correct |
| 8 | D2 | D2 | Bidirectional analog drain 2 | Correct |
| 9 | S2A | S2A | Bidirectional analog source 2A | Correct |
| 10 | SEL2 | SEL2 | Logic control input 2, internal pull-down | Correct |
| 11 | SEL3 | SEL3 | Logic control input 3, internal pull-down | Correct |
| 12 | S3A | S3A | Bidirectional analog source 3A | Correct |
| 13 | D3 | D3 | Bidirectional analog drain 3 | Correct |
| 14 | S3B | S3B | Bidirectional analog source 3B | Correct |
| 15 | EN | ~EN | Active-low enable, internal pull-down | Electrically correct; overbar notation is appropriate |
| 16 | VDD | VDD | Positive supply | Correct |
| 17 | S4B | S4B | Bidirectional analog source 4B | Correct |
| 18 | D4 | D4 | Bidirectional analog drain 4 | Correct |
| 19 | S4A | S4A | Bidirectional analog source 4A | Correct |
| 20 | SEL4 | SEL4 | Logic control input 4, internal pull-down | Correct |
Pin-number/name result: PASS — all 20 pins match the PW package top-view pinout.
Terminal metadata mismatch
All terminals currently have Pin Type = Unspecified, and no functional descriptions were present in the inspected terminal metadata. Recommended terminal types:
- D1–D4 and S1A/B–S4A/B: I/O / bidirectional
- SEL1–SEL4 and EN: Input
- VDD, VSS, GND: Power
Descriptions should also capture the internal 4-MΩ pull-downs on SELx and EN, active-low behavior of EN, and the bidirectional nature of Sx/Dx pins.
Functional Summary
TMUX6234 is a four-channel SPDT precision analog switch. Each SELx independently connects Dx to SxA when high or SxB when low, provided EN is low. EN high opens all four channels. Switching is break-before-make and the analog path is bidirectional.
Key specifications:
- Supply differential: 4.5 V to 36 V
- Single supply: 4.5 V to 36 V
- Dual supply: ±4.5 V to ±18 V
- Analog signal range: VSS to VDD
- Logic thresholds: VIH ≥ 1.3 V, VIL ≤ 0.8 V
- Logic pins tolerate up to 36 V in recommended operation
- Typical RON: 3.6 Ω at 36-V single supply; max 6.2 Ω at 25°C under stated conditions
- PW continuous current at 25°C: up to 360 mA/channel at ±15 V, 345 mA/channel at 36 V, supply-dependent and derated with temperature
- Crosstalk: –105 dB typical at 1 MHz
- Propagation delay: 450 ps typical at ±15 V
- Operating temperature: –40°C to +125°C
- Supply decoupling: 0.1 µF to 10 µF from VDD to GND, and from VSS to GND for dual-supply operation
Flagged Mismatches
- Incorrect Part Type: “Electromechanical Components” should be an integrated-circuit analog switch/multiplexer classification.
- Incorrect parametric classification: “Logic / AND” is wrong; this is a four-channel SPDT analog switch/multiplexer.
- Terminal electrical types missing: all 20 terminals are Unspecified rather than Input, I/O, or Power.
- Terminal descriptions missing: terminal metadata does not describe analog direction, control behavior, pull-downs, or supply roles.
- Description wording: “latch-up immunity” appears in the project description, but the TMUX6234 Rev. C feature list/title does not state latch-up immunity; this claim should be removed unless supported by another official TI qualification document.
- Package property visibility: the footprint is consistent with PW/TSSOP-20, but an explicit Package property was not visible among the returned part properties. Adding “TSSOP-20 (PW), PW0020A” would improve searchability and review clarity.
Overall Assessment
The schematic pin mapping and PCB land pattern are correct and usable for TMUX6234PWR. The problems are concentrated in classification, property completeness, and terminal metadata. Correcting those fields is recommended before publishing or broad reuse.
Scope
Current Part Information
Package and Footprint Cross-Check
Pinout Cross-Check
Terminal metadata mismatch
Functional Summary
Flagged Mismatches
Overall Assessment
