Pin Function Grouping and Datasheet Review
Worked for 3 mins 44 sec
Completed the CMX973Q5 datasheet review and updated all 33 terminals with datasheet-derived pin descriptions, standard pin types, and one non-overlapping functional group per pin. The datasheet URL was already set, and no pin-name, pin-number, or footprint pad-count mismatches were found.
Open items:
- Exposed pad is 3.8 mm square, matching the datasheet maximum; confirm solder-paste aperture strategy with your assembler.
Suggested next steps:
- Standardize manufacturer naming to “CML Microsystems” if desired.
- Review symbol layout readability after the new functional groups.
- Add recommended RF/layout notes for the exposed RFGND pad and supply decoupling.
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Make the functional group more general.
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Add a Section property to all pins, and apply the same value used in the Pin Group property to each pin's Section property.
Thought for 5 sec
I’ll generalize the existing pin groups and mirror each pin’s final Pin Group value into its Section property.
Worked for 35 sec
Updated all pins with more general functional groups and added a matching Section property to each pin.
Groups now used:
- Analog
- RF
- Oscillator
- Digital
- Power
- Ground
Verified that every pin has
Section set to the same value as Pin Group.Review and document
Create pin-group report
Run part review
Fix property warnings
Check footprint geometry
Refine this doc
Ask about this doc
CMX973Q5 Part Review
Source
- Project/part: CMX973Q5
- Manufacturer: CML Micro / CML Microsystems
- Datasheet property: already set to uploaded CMX973 Product Preview PDF
- Package from datasheet: 32-pin VQFN, package code Q5, 5 mm x 5 mm x 0.8–1.0 mm, 0.50 mm pitch, exposed metal pad.
Key Specs from Datasheet
- Function: Quadrature modulator/demodulator RF building block with I/Q modulator, IF/RF demodulator, PLL/VCO, C-BUS serial control, and uncommitted baseband differential amplifiers.
- Digital supply: VDD–VSS = 3.0 V to 3.6 V.
- Analog/RF supply: VCC–VRFGND = 3.0 V to 3.6 V.
- Operating temperature: -40 °C to +85 °C.
- RF modulator output frequency range: 20 MHz to 1000 MHz.
- IF/RF demodulator input range: 20 MHz to 300 MHz.
- LO input range: 40 MHz to 2000 MHz.
- Typical currents: power-save 7 µA, bias-only 1.7 mA, Tx 63 mA, Rx 15 mA.
Functional Pin Groups Applied
Each physical pin is assigned to exactly one primary group.
Table
| Pin | Name | Group | Type | Datasheet function |
|---|---|---|---|---|
| 1 | TXIP | TX Baseband Inputs | Input | Analogue input for baseband transmit I signal (positive) |
| 2 | TXQP | TX Baseband Inputs | Input | Analogue input for baseband transmit Q signal (positive) |
| 3 | TXQN | TX Baseband Inputs | Input | Analogue input for baseband transmit Q signal (negative) |
| 4 | RFOUT | RF/IF Signal | Output | RF output |
| 5 | IFIN | RF/IF Signal | Input | IF/RF input signal |
| 6 | VCC | Analog/RF Power | Power In | Analogue and RF supply |
| 7 | RXIN | RX Baseband Outputs | Output | Analogue output for baseband receive I signal (negative) |
| 8 | RXIP | RX Baseband Outputs | Output | Analogue output for baseband receive I signal (positive) |
| 9 | RXQP | RX Baseband Outputs | Output | Analogue output for baseband receive Q signal (positive) |
| 10 | RXQN | RX Baseband Outputs | Output | Analogue output for baseband receive Q signal (negative) |
| 11 | TXLO | Local Oscillator | Input | Input for modulator local oscillator |
| 12 | REFIN | PLL/Synthesizer | Input | PLL frequency reference input |
| 13 | DO | PLL/Synthesizer | Output | PLL charge pump output |
| 14 | VCCSYNTH | PLL/Synthesizer | Power In | RF supply for synthesiser |
| 15 | CDATA | C-BUS Digital Interface | Input | C-BUS data input |
| 16 | VDD | Digital Power | Power In | C-BUS and digital supply |
| 17 | SCLK | C-BUS Digital Interface | Input | C-BUS clock input |
| 18 | RDATA | C-BUS Digital Interface | Tri-State | C-BUS data output |
| 19 | OA2P | Baseband Amplifier 2 | Input | Baseband amplifier 2 positive input |
| 20 | OA2N | Baseband Amplifier 2 | Input | Baseband amplifier 2 negative input |
| 21 | OA2O | Baseband Amplifier 2 | Output | Baseband amplifier 2 output |
| 22 | CSN | C-BUS Digital Interface | Input | C-BUS chip select |
| 23 | VSS | Digital Ground | Ground | C-BUS and digital ground |
| 24 | OA1P | Baseband Amplifier 1 | Input | Baseband amplifier 1 positive input |
| 25 | OA1N | Baseband Amplifier 1 | Input | Baseband amplifier 1 negative input |
| 26 | OA1O | Baseband Amplifier 1 | Output | Baseband amplifier 1 output |
| 27 | VCON2 | VCO Ports | Passive | VCO negative port 2 |
| 28 | VCON1 | VCO Ports | Passive | VCO negative port 1 |
| 29 | VCOP1 | VCO Ports | Passive | VCO positive port 1 |
| 30 | VCOP2 | VCO Ports | Passive | VCO positive port 2 |
| 31 | RXLO | Local Oscillator | Input | Input for demodulator local oscillator |
| 32 | TXIN | TX Baseband Inputs | Input | Analogue input for baseband transmit I signal (negative) |
| 33 | RFGND | Analog/RF Ground | Ground | Exposed metal pad; analogue/RF ground; connect to RF ground plane |
Cross-check Results
- MPN: matches project property, CMX973Q5.
- Manufacturer: project lists CML Micro; datasheet identifies CML Microcircuits / CML Microsystems. No functional mismatch.
- Symbol pin count: 33 terminals present, matching 32 VQFN leads plus exposed pad pin 33.
- Symbol pin names/numbers: match datasheet pin table for pins 1–33.
- Footprint: QFN50P500X500X100-33N-D uses 0.50 mm pitch, 5 mm body outline, 32 perimeter pads plus one exposed pad; matches Q5 VQFN32 package concept.
- Footprint pad dimensions: perimeter pads 0.30 mm x 0.75 mm and exposed pad 3.8 mm x 3.8 mm. These are within/consistent with datasheet mechanical ranges, with exposed pad at the datasheet maximum.
- Datasheet URL: already present, so no web update was required.
Mismatches / Flags
- No pin-number or pin-name mismatches found.
- No footprint pad-count mismatch found.
- Minor naming note: project manufacturer property says “CML Micro” while datasheet branding says “CML Microcircuits / CML Microsystems”; this is acceptable but could be standardized if desired.
- Footprint exposed pad is 3.8 mm square, which is the datasheet maximum exposed pad dimension. Confirm this is acceptable for the target assembly house solder-paste aperture strategy.
Source
Key Specs from Datasheet
Functional Pin Groups Applied
Cross-check Results
Mismatches / Flags
