Texas Instruments TCAL9539
The TCAL9539 device provides general purpose parallel input/output (I/O) expansion for the two-line bidirectional I2C bus (or SMBus) protocol and is designed for 1.08-V to 3.6-V VCC operation. The device supports 100-kHz (Standard-mode), 400kHz (Fast-mode), and 1-MHz (fast-mode-plus) I2C clock frequencies. The TCAL9539 has Agile I/O ports which include additional features designed to enhance the I/O performance in terms of speed, power consumption and EMI.| Part No. | TCAL9539 |
|---|---|
| Datasheet | TCAL9539 Download |
| Manufacturer |  Texas Instruments |
| Description | SMBus I/O Expander |
| Buy | Stock & Price |
FEATURES
● Operating power-supply voltage range of 1.08 V to 3.6 V● Low standby current consumption of 1 µA typical at 1.8 mV
● 1-MHz 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 100 mA per JESD 78, class II
● ESD protection exceeds JESD 22 – 2000-V Human-body model (A114-A) – 1000-V 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
I/O expanders such as the TCAL9539 provide a simple solution when additional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, and so on.
