TCA6408A Datasheet, PDF (1/35 Pages) Texas Instruments – LOW-VOLTAGE 8-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT, RESET, AND CONFIGURATION REGISTERS

TCA6408A
www.ti.com............................................................................................................................................................. SCPS192C – APRIL 2009– REVISED JULY 2009
LOW-VOLTAGE 8-BIT I²C AND SMBus I/O EXPANDER
WITH INTERRUPT OUTPUT, RESET, AND CONFIGURATION REGISTERS
FEATURES
1
• 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
• 5-V Tolerant I/O Ports
• Active-Low Reset (RESET) Input
• Open-Drain Active-Low Interrupt (INT) Output
• 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)
– 1000-V Charged-Device Model (C101)
PW PACKAGE
(TOP VIEW)
RGT PACKAGE
(TOP VIEW)
RSV PACKAGE
(TOP VIEW)
V_{CCI 1}
ADDR 2
RESET 3
P0 4
P1 5
P2 6
P3 7
GND 8
16 _VCCP
15 _SDA
14 _SCL
13 _INT
12 _P7
11 _P6
10 _P5
9 _P4
RESET ¹
P0 ²
P1 ³
P2 ⁴
Exposed
Center
Pad
12 _SCL
11 _INT
10 _P7
9 _P6
RESET ¹
P0 ²
P1 ³
P2 ⁴
12 _SCL
11 _INT
10 _P7
9 _P6
If used, the exposed center pad
must be connected as a secondary
ground or left electrically open.
1
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.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2009, Texas Instruments Incorporated