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Texas Instruments TCAL6416 I²C-bus/SMBus I/O Expander

Texas Instruments TCAL6416 I²C-bus/SMBus I/O Expander allows a general-purpose parallel input/output (I/O) expansion solution for the two-line bidirectional I²C bus (or SMBus) protocol. The TCAL6416 features a 1.08V to 3.6V power supply voltage on the I²C bus side (VCCI) and a power supply voltage ranging from 1.08V to 3.6V on the P-port side (VCCP).

The TI TCAL6416 I²C-bus/SMBus I/O expander provides a 100kHz (Standard-mode), 400kHz (Fast-mode), and 1MHz (fast-mode-plus) I²C clock frequencies. The device offers a simple solution when additional I/Os are needed for switches, sensors, push buttons, LEDs, fans, and more.

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. Other features on the device are programmable output drive strength, programmable pull-up and pulldown resistors, latchable inputs, maskable interrupt, interrupt status register, and programmable open drain or push-pull outputs.

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 (A114-A)
- 1000V Charged-device model (C101)

Applications

Servers
Routers (telecom switching equipment)
Personal computers
Personal electronics

Industrial automation
Gaming consoles
Products with GPIO-limited processors

Texas Instruments TCAL6416 I²C-bus/SMBus I/O Expander

Features

Applications

Simplified Schematic

Typical Application Schematic

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