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)

– Sticky registers retain values when device is

reset with RESET

– I2C functional state machine is reset

? Open-drain active-low interrupt output (INT)

? Input or output configuration register

? Polarity inversion register

? Configurable I/O drive strength register

? 10kΩ pull-up and pull-down resistor configuration

register

? Internal power-on reset

? Software reset call support

? 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 (A114-A)

– 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 TCAL6416R provides general purpose parallel

input and output (I/O) expansion for the two-line

bidirectional I2C bus (or SMBus) protocol. The device

operates 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 TCAL6416R, provide a simple solution when

additional I/Os are needed for switches, sensors,

push-buttons, LEDs, fans, and so on.

The TCAL6416R 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.

The RESET pin only resets the I2C state machine

when stuck to regain access to the I2C. I/O pins and

sticky registers retain the last configured state while

the I2C is being re-initialized.