TCAL9539RPWR-Texas Instruments-Price, Stock & Datasheet

The TCAL9539R device provides general purpose parallel input/output (I/O) expansion for the two-line bidirectional I2C bus (or SMBus) protocol and is designed for 1.08V to 3.6V VCC operation.

The device supports 100kHz (Standard-mode), 400kHz (Fast-mode), and 1MHz (fast-mode-plus) I2C clock frequencies. I/O expanders such as the TCAL9539R provide a simple solution when additional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, and so on.

The TCAL9539R 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.

Operating power-supply voltage range of 1.08V to 3.6V
Low standby current consumption of 1µA typical at 1.8mV
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
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
- 2000V Human-body model (A114-A)
- 1000V Charged-device model (C101)