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)

All trademarks are the property of their respective owners.

View more

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
Package Size: mm2:W x L (PKG)
Pin/Package
TCA6408A PCA6107 TCA6416A TCA6424A TCA7408 TCA9538 TCA9539 TCA9539-Q1
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   
1.8
2.7
3.3
3.6   
0.4      0.4    0.4    0.4    0.4    0.4    0.4   
1.65      1.65    1.65    1.65    1.65    1.65    1.65   
400      400    400    400    400    400    400   
5.5      5.5    5.5    5.5    5.5    5.5    3.6   
0100 00x      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   
QFN
TSSOP
UQFN   
SOIC    BGA MICROSTAR JUNIOR
TSSOP
WQFN   
UQFN    uCSP    TSSOP
SSOP   
TSSOP
VQFN
WQFN   
TSSOP   
16UQFN: 5 mm2: 1.8 x 2.6(UQFN)
16QFN: 9 mm2: 3 x 3(QFN)
16TSSOP: 32 mm2: 6.4 x 5(TSSOP)   
18SOIC: 119 mm2: 10.3 x 11.55(SOIC)    24BGA MICROSTAR JUNIOR: 9 mm2: 3 x 3(BGA MICROSTAR JUNIOR)
24WQFN: 16 mm2: 4 x 4(WQFN)
24TSSOP: 50 mm2: 6.4 x 7.8(TSSOP)   
32UQFN: 25 mm2: 5 x 5(UQFN)    16uCSP: 4 mm2: 2 x 2(uCSP)    16TSSOP: 32 mm2: 6.4 x 5(TSSOP)
16SSOP: 48 mm2: 7.8 x 6.2(SSOP)   
24VQFN: 16 mm2: 4 x 4(VQFN)
24WQFN: 16 mm2: 4 x 4(WQFN)
24TSSOP: 50 mm2: 6.4 x 7.8(TSSOP)   
24TSSOP: 50 mm2: 6.4 x 7.8(TSSOP)   
16TSSOP
16UQFN
16QFN   
18SOIC    24TSSOP
24BGA MICROSTAR JUNIOR
24WQFN   
32UQFN    16uCSP    16SSOP
16TSSOP   
24TSSOP
24WQFN
24VQFN   
24TSSOP   

Other qualified versions of TCA6408A

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