Product
0
TCAL6416R
  • TCAL6416R
  • TCAL6416R
  • TCAL6416R
  • TCAL6416R
  • TCAL6416R

TCAL6416R

ACTIVE

16-bit translating I²C-bus/SMBus I/O expander with interrupt, reset, sticky registers, and agile

Texas Instruments TCAL6416R Product Info

1 April 2026 1

Parameters

Number of I/Os

16

Features

1-MHz maximum frequency, Adjustable I/O level, Configuration registers, Interrupt pin, Reset pin

Supply voltage (min) (V)

1.08

Supply voltage (max) (V)

3.6

Addresses

2

Rating

Catalog

Frequency (max) (MHz)

1

Operating temperature range (°C)

-40 to 125

Package

X2QFN (DTO)-24-4 mm² 2 x 2

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)
  • 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)

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 P-port 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 pull-down resistors, latchable inputs, maskable interrupt, interrupt status register, and programmable open-drain 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.

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 P-port 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 pull-down resistors, latchable inputs, maskable interrupt, interrupt status register, and programmable open-drain 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.

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