Packaging information
| Package | Pins X2QFN (DTU) | 16 |
| Operating temperature range (°C) -40 to 125 |
| Package qty | Carrier 3,000 | LARGE T&R |
Features for the TCAL9538
- Operating power-supply voltage range of 1.08V to 3.6V
- Low standby current consumption of 1µA typical at 1.8V
- 1MHz fast mode plus I2C bus
- Hardware address pin allows four 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)
Description for the TCAL9538
The TCAL9538 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 TCAL9538 provide a simple solution when additional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, and so on.
The TCAL9538 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.