TCA6408ARGTR
Interface ICs
Technical Specifications
| Type | Description |
|---|---|
| Interface | I2C;SMBus |
| Number of I/O | 8 |
| Quiescent Current | 1.5 µA |
| Interrupt Output | Interrupt Output |
| Number of Supporting Devices | 2 |
| Current - Output High(IOH) | 10mA |
| Type | Description |
|---|---|
| Operating Temperature | -40°C~+85°C |
| Output Type | Push-Pull |
| Features | Reset function;Built-in LED driver;IO level configurable;Cascade and address expansion |
| Supply Voltage | 1.65V~5.5V |
| Package / Case | QFN-16-EP(3x3) |
Product Introduction
The TCA6408A is a 16-pin device that provides 8-bit general-purpose parallel I/O expansion for the two-wire bidirectional I2C bus (or SMBus) protocol. During device operation, both the I2C bus side (VCCI) and the P-port side (VCCP) can be powered by supplies ranging from 1.65V to 5.5V. This allows the TCA6408A to interface with next-generation microprocessors and microcontrollers on the SDA/SCL side, where supply voltages are being reduced to save power. Unlike the trend toward lower supply voltages for microprocessors and microcontrollers, some PCB components (such as LEDs) still require a 5V supply.
The device supports clock frequencies of 100kHz (standard mode) and 400kHz (fast mode). When additional I/O is needed for devices such as switches, sensors, buttons, LEDs, and fans, I/O expanders like the TCA6408A provide a simple solution.
Features
- I2C-to-parallel port expander
- Operating supply voltage range: 1.65V to 5.5V
- Supports bidirectional voltage-level translation and GPIO expansion between 1.8V, 2.5V, 3.3V, and 5V I2C bus and P-port
- 1μA low standby current consumption
- 5V-tolerant I/O ports
- 400kHz fast-mode I2C bus
- Hardware address pins allowing two TCA6408A devices on the same I2C/SMBus
- Active-low reset (RESET) input
- Open-drain active-low interrupt (INT) output
- Input and output configuration registers
- Polarity inversion register
- Internal power-on reset
- All channels configured as inputs at power-up
- Glitch-free power-up
- Noise filters on SCL and SDA inputs
- Latched outputs with maximum high-current drive capability for direct LED driving
- Latch-up performance exceeding 100mA per JESD78 Class II
- Schmitt-trigger inputs on SCL and SDA for slow input transitions and improved switching noise immunity
- ESD protection exceeding JESD22
- 2000V Human Body Model (A114-A)
- 1000V Charged Device Model (C101)
Applications
- Servers
- Routers (telecom switching equipment)
- Personal computers
- Personal electronics (gaming consoles)
- Industrial automation
- Products with GPIO-constrained processors
Datasheet
Compliance & Export Codes
| Type | Details |
|---|---|
| RoHS | ROHS3 |
| ECCN | EAR99 |
| CNHTS | 8542399000 |
| USHTS | 8542390001 |
| TARIC | 8542399000 |
| Type | Details |
|---|---|
| CAHTS | 8542390000 |
| BRHTS | 85423999 |
| INHTS | 85423900 |
| MXHTS | 8542.39.99 |
Sourcing Information
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