TCA6408_09 Datasheet, PDF (1/31 Pages) Texas Instruments – LOW-VOLTAGE 8-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT, RESET, AND CONFIGURATION REGISTERS

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TCA6408
LOW-VOLTAGE 8-BIT I²C AND SMBus I/O EXPANDER
WITH INTERRUPT OUTPUT, RESET, AND CONFIGURATION REGISTERS
SCPS151C – FEBRUARY 2007 – REVISED JUNE 2007
FEATURES
• 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 SCL/SDA and 1.8-V, 2.5-V,
3.3-V, or 5-V P Port
– 2.5-V SCL/SDA and 1.8-V, 2.5-V,
3.3-V, or 5-V P Port
– 3.3-V SCL/SDA and 1.8-V, 2.5-V,
3.3-V, or 5-V P Port
– 5-V SCL/SDA and 1.8-V, 2.5-V,
3.3-V, or 5-V P Port
• I²C to Parallel Port Expander
• Low Standby Current Consumption of 1 µA
• Schmitt-Trigger Action Allows Slow Input
Transition and Better Switching Noise
Immunity at the SCL and SDA Inputs
– V_hys = 0.18 V Typ at 1.8 V
– V_hys = 0.25 V Typ at 2.5 V
– V_hys = 0.33 V Typ at 3.3 V
– V_hys = 0.5 V Typ at 5 V
PW PACKAGE
(TOP VIEW)
• 5-V Tolerant I/O Ports
• Active-Low Reset Input (RESET)
• Open-Drain Active-Low Interrupt Output (INT)
• 400-kHz Fast I²C Bus
• 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
• ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
RGT PACKAGE
(TOP VIEW)
V_CCI
1
ADDR
2
RESET
3
P0
4
P1
5
P2
6
P3
7
GND
8
16
V_CCP
15
SDA
ZXY PACKAGE
(TOP VIEW)
12345
14
SCL
16 15 14 13
RESET 1
12 SCL A
13
INT
P0 2
11 INT B
12
P7
P1 3
10 P7 C
11
P6
10
P5
P2 4
9 P6 D
5678
9
P4
DESCRIPTION/ORDERING INFORMATION
This 8-bit I/O expander for the two-line bidirectional bus (I²C) is designed to provide general-purpose remote I/O
expansion for most microcontroller families via the I²C interface [serial clock (SCL) and serial data (SDA)].
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
UNLESS OTHERWISE NOTED this document contains
PRODUCTION DATA information current as of publication date.
Products conform to specifications per the terms of Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2007, Texas Instruments Incorporated