1 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 3 μA
• 5-V Tolerant I/O ports
• 400-kHz Fast I2C bus
• Hardware address pin allows two TCA6416A
devices on the same I2C/SMBus bus
• Active-low reset input ( RESET)
• Open-drain active-low interrupt output ( INT)
• 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 and 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)

2 Applications
. Servers
. Routers (telecom switching equipment)
. Personal computers
. Personal electronics (for example, gaming
consoles)
. Industrial automation
. Products with GPIO-limited processors

3 Description
The TCA6416A is a 24-pin device that provides 16-
bits of general purpose parallel input/output (I/O)
expansion for the two-line bidirectional I2C bus (or
SMBus) protocol. The device can operate with a
power supply voltage ranging from 1.65 V to 5.5 V on
the I2C bus side (VCCI) and a power supply voltage
ranging from 1.65 V to 5.5 V on the P-port side
(VCCP).
The device supports both 100-kHz (Standard-mode)
and 400-kHz (Fast-mode) clock frequencies. I/O
expanders such as the TCA6416A provide a simple
solution when additional I/Os are needed for switches,
sensors, push-buttons, LEDs, fans, and so forth.