Overview
The TCA6408ARSVR from Texas Instruments is a low-voltage 8-bit I2C and SMBus I/O expander designed to provide additional I/O ports for microcontrollers and microprocessors. This device operates within a power supply voltage range of 1.65 V to 5.5 V, making it versatile for various applications. It features a compact UQFN-16 package and supports both 100-kHz (Standard-mode) and 400-kHz (Fast-mode) clock frequencies on the I2C/SMBus bus. The TCA6408ARSVR is equipped with an active-low reset input, an open-drain active-low interrupt output, and configuration registers, enhancing its functionality and reliability.
Key Specifications
| Attribute | Description |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | TCA6408ARSVR |
| Package | UQFN-16 (1.8x2.6) |
| Operating Voltage | 1.65 V to 5.5 V DC |
| Interface | I2C, SMBus |
| Operating Temperature | -40°C to 85°C |
| Clock Frequency | Up to 400 kHz |
| Standby Current | 1 µA |
| I/O Ports | 8-bit general purpose parallel input/output |
| ESD Protection | 2000-V Human Body Model, 1000-V Charged-Device Model |
Key Features
- Provides 8-bits of general purpose parallel input/output (I/O) expansion for the two-line bidirectional I2C bus (or SMBus) protocol.
- Operating power-supply voltage range of 1.65 V to 5.5 V on both the I2C bus side and the P-port side.
- 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.
- Hardware address pin allows two TCA6408A devices on the same I2C/SMBus bus.
- Active-low reset (RESET) input and open-drain active-low interrupt (INT) output.
- Input and output configuration register, polarity inversion register, and internal power-on reset.
- No glitch on power up and noise filter on SCL and SDA inputs.
- Latched outputs with high-current drive capability for directly driving LEDs.
- Schmitt-trigger action for better switching noise immunity at the SCL and SDA inputs.
Applications
The TCA6408ARSVR is suitable for a wide range of applications where additional I/O ports are required. These include:
- Expanding I/Os for switches, sensors, push-buttons, LEDs, fans, and other peripherals in microcontroller and microprocessor systems.
- Industrial and consumer electronics where reliability and performance are critical.
- Next-generation microprocessors and microcontrollers with dropping power supply levels.
- PCB designs requiring voltage-level translation between different voltage domains.
Q & A
- What is the TCA6408ARSVR?
The TCA6408ARSVR is a low-voltage 8-bit I2C and SMBus I/O expander from Texas Instruments.
- What is the operating voltage range of the TCA6408ARSVR?
The device operates within a power supply voltage range of 1.65 V to 5.5 V DC.
- What interfaces does the TCA6408ARSVR support?
The TCA6408ARSVR supports both I2C and SMBus interfaces.
- What is the maximum clock frequency of the TCA6408ARSVR?
The device supports up to 400 kHz clock frequency in Fast-mode.
- What is the package type of the TCA6408ARSVR?
The TCA6408ARSVR is available in a UQFN-16 package.
- Does the TCA6408ARSVR have ESD protection?
Yes, the device has ESD protection exceeding 2000-V Human Body Model and 1000-V Charged-Device Model.
- What are the key features of the TCA6408ARSVR's I/O ports?
The I/O ports are 5-V tolerant, have latched outputs with high-current drive capability, and support bidirectional voltage-level translation.
- Can multiple TCA6408ARSVR devices be used on the same I2C/SMBus bus?
Yes, the hardware address pin allows two TCA6408A devices on the same I2C/SMBus bus.
- What are some common applications of the TCA6408ARSVR?
The device is commonly used in expanding I/Os for switches, sensors, LEDs, fans, and other peripherals in microcontroller and microprocessor systems.
- Does the TCA6408ARSVR have noise filtering capabilities?
Yes, the device includes noise filters on SCL and SDA inputs and Schmitt-trigger action for better switching noise immunity.
