Library

TCA9548A

8-channel I2C multiplexer, TSSOP-24

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Search the Adom Wiki for the library component "TCA9548A" (slug: tca9548a) at https://wiki-ufypy5dpx93o.adom.cloud/wiki/libraries/tca9548a. Pull down the KiCad symbol, footprint, and 3D model files from the wiki page's assets. Install them into my current KiCad project and register in sym-lib-table and fp-lib-table. If the page has a datasheet URL, save that too.
Manufacturer Texas Instruments
Package TSSOP-24
Pins 24 pins (Upstream, Downstream, Config, Power)
LCSC C130592
Channels 8 I2C buses
Interface I2C (400kHz)
Addresses 8 (via A0-A2)
Supply 1.65V-5.5V

Library View

Interactive symbol, footprint, and 3D model — hover pins for cross-highlighting.

SymbolGenerated Generated from pin data (KiCad symbol Interface_Expansion/TCA9548APWR is multi-unit)
FootprintKiCad KiCad standard library: Package_SO/TSSOP-24_4.4x7.8mm_P0.65mm
3DGenerated Generated pad visualization (Babylon.js)

Breakout Board

Auto-generated breakout molecule for TCA9548A — all pins brought to 2mm-pitch headers with 4 corner machine pins on 8mm grid.

Pricing & Availability

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Specifications

Channels8 I2C buses
InterfaceI2C (400kHz)
Addresses8 (via A0-A2)
Supply1.65V-5.5V
PackageTSSOP-24

Pin Configuration

UpstreamDownstreamConfigPower
PinNameGroupFunction
Upstream — Upstream I2C bus
23SDAUpstreamUpstream I2C data
24VCCUpstreamSupply voltage (1.65V-5.5V)
Downstream — Switched I2C channels
2A1DownstreamAddress select bit 1
3A2DownstreamAddress select bit 2
4RESETDownstreamReset (active low)
5SD0DownstreamChannel 0 SDA
6SC0DownstreamChannel 0 SCL
7SD1DownstreamChannel 1 SDA
8SC1DownstreamChannel 1 SCL
9SD2DownstreamChannel 2 SDA
10SC2DownstreamChannel 2 SCL
11SD3DownstreamChannel 3 SDA
14SD4DownstreamChannel 4 SDA
15SC4DownstreamChannel 4 SCL
16SD5DownstreamChannel 5 SDA
17SC5DownstreamChannel 5 SCL
18SD6DownstreamChannel 6 SDA
19SC6DownstreamChannel 6 SCL
Config — Address and reset
1A0ConfigAddress select bit 0
20SD7ConfigChannel 7 SDA
21SC7ConfigChannel 7 SCL
22SCLConfigUpstream I2C clock
Power — Supply and ground
12SC3PowerChannel 3 SCL
13GNDPowerGround

AI Skill Technical Reference

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TCA9548A — 8-channel I2C multiplexer, TSSOP-24

Manufacturer: Texas Instruments Package: TSSOP-24 LCSC: C130592

Description

The TCA9548A is an 8-channel I2C multiplexer from TI. Allows multiple I2C devices with the same address to coexist on a single bus. Features active-low reset and supports 400kHz Fast-mode.

Electrical Specifications

  • Channels: 8 I2C buses
  • Interface: I2C (400kHz)
  • Addresses: 8 (via A0-A2)
  • Supply: 1.65V-5.5V
  • Package: TSSOP-24

Pin Configuration

Package: TSSOP-24

  • Pin 1: A0 — Address select bit 0
  • Pin 2: A1 — Address select bit 1
  • Pin 3: A2 — Address select bit 2
  • Pin 4: RESET — Reset (active low)
  • Pin 5: SD0 — Channel 0 SDA
  • Pin 6: SC0 — Channel 0 SCL
  • Pin 7: SD1 — Channel 1 SDA
  • Pin 8: SC1 — Channel 1 SCL
  • Pin 9: SD2 — Channel 2 SDA
  • Pin 10: SC2 — Channel 2 SCL
  • Pin 11: SD3 — Channel 3 SDA
  • Pin 12: SC3 — Channel 3 SCL
  • Pin 13: GND — Ground
  • Pin 14: SD4 — Channel 4 SDA
  • Pin 15: SC4 — Channel 4 SCL
  • Pin 16: SD5 — Channel 5 SDA
  • Pin 17: SC5 — Channel 5 SCL
  • Pin 18: SD6 — Channel 6 SDA
  • Pin 19: SC6 — Channel 6 SCL
  • Pin 20: SD7 — Channel 7 SDA
  • Pin 21: SC7 — Channel 7 SCL
  • Pin 22: SCL — Upstream I2C clock
  • Pin 23: SDA — Upstream I2C data
  • Pin 24: VCC — Supply voltage (1.65V-5.5V)

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0 revisions · Updated 2026-03-02 17:31:36