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PCM1681TPWPRQ1
Public Made by Adomby adom
Texas Instruments ADCs/DACs - Special Purpose, HTSSOP-28. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownPCM1681TPWPRQ1
Texas Instruments · ADCs/DACs - Special Purpose · HTSSOP-28
PCM1681TPWPRQ1 from Texas Instruments, in a HTSSOP-28. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | ZR1/ZR1/FMT0 | bidirectional | Zero-flag output 1 for SPI/I2C modes or format control input 0 for parallel H/W mode; Schmitt-trigger 5-V tolerant. |
| 2 | MS/ADR/FMT1 | input | Select input for SPI, address input for I2C, format control input 1 for H/W; Schmitt-trigger 5-V tolerant. |
| 3 | MC/SCL/DEMP | input | Shift clock input for SPI, serial clock input for I2C, de-emphasis control for H/W; Schmitt-trigger 5-V tolerant. |
| 4 | MD/SDA/MUTE | bidirectional | Serial data input for SPI, serial data input/output for I2C, mute control for H/W; Schmitt-trigger 5-V tolerant, open-drain output in I2C mode. |
| 5 | SCK | input | System clock input with frequency of 128, 192, 256, 384, 512, 768, or 1152 fS (1.024 to 36.864 MHz). |
| 6 | DATA1 | input | Serial audio data input for VOUT1 and VOUT2; Schmitt-trigger 5-V tolerant. |
| 7 | BCK | input | Shift clock input for serial audio data; Schmitt-trigger 5-V tolerant. |
| 8 | LRCK | input | Left/right clock input with frequency equal to sampling rate fS; 5-V tolerant. |
| 9 | VDD | power_in | Digital power supply, 3.3 V nominal (3.0 to 3.6 V operating range). |
| 10 | DGND | power_in | Digital ground. |
| 11 | DATA2 | input | Serial audio data input for VOUT3 and VOUT4; Schmitt-trigger 5-V tolerant. |
| 12 | DATA3 | input | Serial audio data input for VOUT5 and VOUT6; Schmitt-trigger 5-V tolerant. |
| 13 | DATA4 | input | Serial audio data input for VOUT7 and VOUT8; Schmitt-trigger 5-V tolerant. |
| 14 | MSEL | input | Mode control select for I2C (tied to DGND), SPI (tied to VDD), or parallel H/W (pull-up/pull-down for wide/narrow oversampling); VDD/2 biased quad-state input. |
| 15 | VOUT8 | output | Unbalanced audio output for right-channel of DATA4, 3.75 VPP typical into 5 kΩ load. |
| 16 | VOUT7 | output | Unbalanced audio output for left-channel of DATA4, 3.75 VPP typical into 5 kΩ load. |
| 17 | VCC1 | power_in | Analog power supply, 5 V nominal (4.5 to 5.5 V operating range). |
| 18 | AGND1 | power_in | Analog ground. |
| 19 | VOUT6 | output | Unbalanced audio output for right-channel of DATA3, 3.75 VPP typical into 5 kΩ load. |
| 20 | VOUT5 | output | Unbalanced audio output for left-channel of DATA3, 3.75 VPP typical into 5 kΩ load. |
| 21 | VOUT4 | output | Unbalanced audio output for right-channel of DATA2, 3.75 VPP typical into 5 kΩ load. |
| 22 | VOUT3 | output | Unbalanced audio output for left-channel of DATA2, 3.75 VPP typical into 5 kΩ load. |
| 23 | VCC2 | power_in | Analog power supply, 5 V nominal (4.5 to 5.5 V operating range). |
| 24 | AGND2 | power_in | Analog ground. |
| 25 | VCOM | output | Common voltage output biased to 0.486 VCC; requires 10-μF capacitor bypass to AGND. |
| 26 | VOUT2 | output | Unbalanced audio output for right-channel of DATA1, 3.75 VPP typical into 5 kΩ load. |
| 27 | VOUT1 | output | Unbalanced audio output for left-channel of DATA1, 3.75 VPP typical into 5 kΩ load. |
| 28 | ZR2 | output | Zero-flag output 2, detects silence on assigned channels; active-high by default. |
| 29 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | HTSSOP-28 |
| Category | Data Acquisition |
| Pins | 29 |
CAD (KiCad official)
- Symbol:
PCM1681TPWPRQ1 - Footprint:
Package_SO:TSSOP-28-1EP_4.4x9.7mm_P0.65mm_EP2.85x6.7mm - 3D model: HTSSOP-28 (KiCad packages3D, STEP)
- 3D model files:
pcm1681tpwprq1-etched.step/pcm1681tpwprq1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);pcm1681tpwprq1.step/pcm1681tpwprq1.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (46 pp, sha256
a111585ea2f64b35, retrieved 2026-10-01, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).