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PCM1681TPWPRQ1

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Texas Instruments ADCs/DACs - Special Purpose, HTSSOP-28. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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PCM1681TPWPRQ1

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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); pcm1681tpwprq1.step / pcm1681tpwprq1.glb are 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, primary claude-haiku-4-5-20251001 (text), consensus claude-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).

Datasheet PDF