Low-Voltage 8-Bit I2C and SMBus I/O Expander - TCA6408A

TCA6408A (ACTIVE)

Low-Voltage 8-Bit I2C and SMBus I/O Expander

 

Description

The TCA6408A is a 16-pin device that provides 8-bits of general purpose parallel input/output (I/O) expansion for the two-line bidirectional I2C bus (or SMBus) protocol. This device can operate with a power supply voltage ranging from 1.65 V to 5.5 V on both the I2C bus side (VCCI) and on the P-port side (VCCP). This allows the TCA6408A to interface with next-generation microprocessors and microcontrollers on the SDA/SCL side, where supply levels are dropping down to conserve power. In contrast to the dropping power supplies of microprocessors and microcontrollers, some PCB components such as LEDs remain at a 5-V power supply.

The device supports both 100-kHz (Standard-mode) and 400-kHz (Fast-mode) clock frequencies. I/O expanders such as the TCA6408A provide a simple solution when additional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, and so forth.

Features

  • I2C to Parallel Port Expander
  • Operating Power-Supply Voltage Range of 1.65 V to 5.5 V
  • Allows Bidirectional Voltage-Level Translation and GPIO Expansion Between 1.8-V, 2.5-V, 3.3-V, and 5-V I2C Bus and P-Ports
  • Low Standby Current Consumption of 1 μA
  • 5-V Tolerant I/O Ports
  • 400-kHz Fast I2C Bus
  • Hardware Address Pin Allows Two TCA6408A Devices on the Same I2C/SMBus Bus
  • Active-Low Reset (RESET) Input
  • Open-Drain Active-Low Interrupt (INT) Output
  • Input/Output Configuration Register
  • Polarity Inversion Register
  • Internal Power-On Reset
  • Power Up With All Channels Configured as Inputs
  • No Glitch On Power Up
  • Noise Filter on SCL/SDA Inputs
  • Latched Outputs With High-Current Drive Maximum Capability for Directly Driving LEDs
  • Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
  • Schmitt-Trigger Action Allows Slow Input Transition and Better Switching Noise Immunity at the SCL and SDA Inputs
  • ESD Protection Exceeds JESD 22
    • 2000-V Human Body Model (A114-A)
    • 1000-V Charged-Device Model (C101)

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Parametrics Compare all products in I2C General Purpose I/O (GPIO)

 
Voltage Nodes (V)
fSCLK (Max) (MHz)
VCC (Min) (V)
Max Frequency (kHz)
VCC (Max) (V)
I2C Address
Number of I/Os
Rating
Operating Temperature Range (C)
Package Group
Pin/Package
TCA6408A PCA6107 TCA6416A TCA6424A TCA7408 TCA9538 TCA9539 TCA9539-Q1
1.8
2.7
3.3
3.6
5   
2.7
3.3
3.6
5   
1.8
2.7
3.3
3.6
5   
1.8
2.7
3.3
3.6
5   
1.8
2.7
3.3
3.6
5   
1.8
2.7
3.3
3.6
5   
1.8
2.7
3.3
3.6
5   
1.8
2.7
3.3
3.6   
0.4    0.4    0.4    0.4    0.4    0.4    0.4    0.4   
1.65    2.3    1.65    1.65    1.65    1.65    1.65    1.65   
400    400    400    400    400    400    400    400   
5.5    5.5    5.5    5.5    5.5    5.5    5.5    3.6   
0100 00x    0011 xxx    0100 00x    0100 01x    0100 00x    1110 0xx    1110 1xx    1110 1xx   
8    8    16    24    8    8    16    16   
Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Automotive   
-40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 125   
TSSOP
UQFN
VQFN   
SOIC    BGA MICROSTAR JUNIOR
TSSOP
WQFN   
UQFN    uCSP    SSOP
TSSOP   
TSSOP
VQFN
WQFN   
TSSOP   
16TSSOP
16UQFN
16VQFN   
18SOIC    24BGA MICROSTAR JUNIOR
24TSSOP
24WQFN   
32UQFN    16uCSP    16SSOP
16TSSOP   
24TSSOP
24VQFN
24WQFN   
24TSSOP   

Other qualified versions of TCA6408A

Version Part Number Definition
Automotive TCA6408A-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects