Packaging information
| Package | Pins VQFN (RGT) | 16 |
| Operating temperature range (°C) -40 to 85 |
| Package qty | Carrier 3,000 | LARGE T&R |
Features for the TCA6408A
- I2C to Parallel port expander
- Operating power-supply voltage range of 1.65 V to 5.5 V
- Allows bidirectional voltage-level translation and gpio expansion between 1.8-V, 2.5-V, 3.3-V, and 5-V I2C bus and P-ports
- Low standby current consumption of 1 µA
- 5-V Tolerant I/O ports
- 400-kHz Fast I2C bus
- Hardware address pin allows two TCA6408A Devices on the same I2C/SMBus bus
- Active-low reset ( RESET) input
- Open-drain active-low interrupt ( INT) output
- Input and output configuration register
- Polarity inversion register
- Internal power-on reset
- Power up with all channels configured as inputs
- No glitch on power up
- Noise filter on SCL and 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
- Schmitt-trigger action allows slow input transition and better switching noise immunity at the SCL and SDA inputs
- ESD Protection exceeds JESD 22
- 2000-V Human body model (A114-A)
- 1000-V Charged-device model (C101)
Description for the TCA6408A
The TCA6408A is a 16-pin device that provides 8-bits of general purpose parallel input/output (I/O) expansion for the two-line bidirectional I2C bus (or SMBus) protocol. This device can operate with a power supply voltage ranging from 1.65 V to 5.5 V on both the I2C bus side (VCCI) and on the P-port side (VCCP). This allows the TCA6408A to interface with next-generation microprocessors and microcontrollers on the SDA/SCL side, where supply levels are dropping down to conserve power. In contrast to the dropping power supplies of microprocessors and microcontrollers, some PCB components such as LEDs remain at a 5-V power supply.
The device supports both 100-kHz (Standard-mode) and 400-kHz (Fast-mode) clock frequencies. I/O expanders such as the TCA6408A provide a simple solution when additional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, and so forth.