Overview
The TCA6416APWR, produced by Texas Instruments, is a 16-bit translating I2C/SMBus I/O expander designed to provide additional general-purpose parallel input/output (I/O) expansion for the two-line bidirectional I2C bus (or SMBus) protocol. This device is particularly useful in applications where additional I/Os are needed for components such as switches, sensors, push-buttons, LEDs, and fans.
Key Specifications
| Parameter | Value |
|---|---|
| Operating Power-Supply Voltage Range | 1.65 V to 5.5 V (VCCI and VCCP) |
| I2C Bus Speed | 100 kHz (Standard-mode) and 400 kHz (Fast-mode) |
| Number of I/O Bits | 16 bits |
| Standby Current Consumption | 3 µA |
| I/O Port Tolerance | 5-V Tolerant I/O ports |
| Interrupt Output | Open-drain active-low interrupt output (INT) |
| Reset Input | Active-low reset input (RESET) |
| Package Options | TSSOP (24-pin), WQFN (24-pin), Microstar BGA Junior (24-pin) |
| Thermal Resistance (Junction-to-Ambient) | 108.8 °C/W (TSSOP), 43.6 °C/W (WQFN), 159.2 °C/W (BGA Microstar Junior) |
Key Features
- I2C to parallel port expander with 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 3 µA.
- 5-V Tolerant I/O ports.
- 400-kHz Fast I2C bus support.
- Hardware address pin allows two TCA6416A devices on the same I2C/SMBus bus.
- Input/output configuration register and polarity inversion register.
- Internal power-on reset and power-up with all channels configured as inputs.
- No glitch on power up and noise filter on SCL and SDA inputs.
- Latched outputs with high-current drive capability for directly driving LEDs.
- ESD Protection exceeds JESD 22 standards (2000-V Human-body model, 200-V Machine model, 1000-V Charged-device model).
Applications
- Expansion of I/Os for switches, sensors, push-buttons, LEDs, and fans.
- Use in embedded systems requiring additional I/O ports.
- Implementation in industrial control systems, consumer electronics, and automotive systems.
- Suitable for applications needing voltage-level translation between different voltage domains.
Q & A
- What is the operating power-supply voltage range of the TCA6416APWR?
The operating power-supply voltage range is from 1.65 V to 5.5 V for both VCCI and VCCP.
- What are the supported I2C bus speeds?
The device supports both 100 kHz (Standard-mode) and 400 kHz (Fast-mode) clock frequencies.
- How many I/O bits does the TCA6416APWR provide?
The device provides 16 bits of general-purpose parallel input/output (I/O) expansion.
- What is the standby current consumption of the TCA6416APWR?
The standby current consumption is 3 µA.
- Does the TCA6416APWR support multiple devices on the same I2C/SMBus bus?
Yes, the hardware address pin allows two TCA6416A devices on the same I2C/SMBus bus.
- What type of interrupt output does the TCA6416APWR have?
The device has an open-drain active-low interrupt output (INT).
- What is the purpose of the internal power-on reset?
The internal power-on reset ensures that all channels are configured as inputs at power-up.
- Does the TCA6416APWR have ESD protection?
Yes, the device has ESD protection exceeding JESD 22 standards.
- What are the package options available for the TCA6416APWR?
The device is available in TSSOP (24-pin), WQFN (24-pin), and Microstar BGA Junior (24-pin) packages.
- What is the thermal resistance of the TCA6416APWR in different packages?
The thermal resistance varies by package: 108.8 °C/W (TSSOP), 43.6 °C/W (WQFN), and 159.2 °C/W (BGA Microstar Junior).
