1 Features
. Operating power-supply voltage range of 1.08V to
3.6V
. Allows bidirectional voltage-level translation and
GPIO expansion between 1.2V, 1.8V, 2.5V, and
3.3V I2C bus and p-ports
. Low standby current consumption of 1μA typical at
1.8V
. 1MHz fast mode plus I2C bus
. Hardware address pin allows two devices on the
same I2C, SMBus bus
. Active-low reset input (RESET )
. Open-drain active-low interrupt output (INT )
. Input or output configuration register
. Polarity inversion register
. Configurable I/O drive strength register
. Pull-up and pull-down resistor configuration
register
. Internal power-on reset
. Noise filter on SCL or SDA inputs
. Latched outputs with high-current drive maximum
capability for directly driving LEDs
. Latch-up performance exceeds 100mA per JESD
78, class II
. ESD protection exceeds JESD 22
. 4000V Human-body model (A114A)
. 1000V Charged-device model (C101)

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

3 Description
The TCAL6416 device provides 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
1.08V to 3.6V on the I2C bus side (VCCI) and a power
supply voltage ranging from 1.08V to 3.6V on the Pport
side (VCCP).
The device supports 100kHz (Standard-mode),
400kHz (Fast-mode), and 1MHz (fast-mode-plus)
I2C clock frequencies. I/O expanders such as the
TCAL6416 provide a simple solution when additional
I/Os are needed for switches, sensors, push-buttons,
LEDs, fans, etc.
The TCAL6416 has Agile I/O ports which include
additional features designed to enhance the I/O
performance in terms of speed, power consumption
and EMI. The additional features are: programmable
output drive strength, programmable pull-up and pulldown
resistors, latchable inputs, maskable interrupt,
interrupt status register, and programmable opendrain
or push-pull outputs.