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

TCA6408A (ACTIVE)

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



TCA6408A Free Sample Package Options

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

The TCA6408A Low-voltage 8-Bit I2C and SMBus I/O expander allows bidirectional voltage-level translation and GPIO expansion from 1.8V-5V on the P-port side to 1.8V-5V on the SDA/SCL side.

6.4mm x 5mm 3mm x 3mm 2.6mm x 1.8mm

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 IO Expander

 
Voltage Nodes (V)
Approx. Price (US$)
Pin/Package
Operating Temperature Range (C)
Max Frequency (kHz)
I2C Address
# of I/Os
Rating
Special Features
TCA6408A PCA6107 TCA6416A TCA6424A TCA7408
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    
0.60 | 1ku     0.90 | 1ku     0.78 | 1ku     0.95 | 1ku     0.85 | 1ku    
16QFN
16TSSOP
16UQFN    
18SOIC     24BGA MICROSTAR JUNIOR
24TSSOP
24WQFN    
32UQFN     16uCSP    
-40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85    
400       400     400     400    
0100 00x       0100 00x     0100 01x     0100 00x    
8     8     16     24     8    
Catalog     Catalog     Catalog     Catalog     Catalog    
5V Tolerant I/O
Configuration Registers
Interrupt Driven
Interrupt Output
Low Power
Low Voltage
Push-Pull I/O Type
Reset Input    
  5V Tolerant I/O
Configuration Registers
Interrupt Driven
Interrupt Output
Low Power
Low Voltage
Push-Pull I/O Type
Reset Input    
5V Tolerant I/O
Configuration Registers
Interrupt Driven
Interrupt Output
Low Power
Low Voltage
Push-Pull I/O Type
Reset Input    
Configuration Registers
Interrupt Driven
Interrupt Output
Low Power
Low Voltage
Programmable Pull-Up/Pull-Down
Push-Pull I/O Type
Reset Input    
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