Overview
The TCA9555RTWR is a low-voltage 16-bit I2C and SMBus I/O expander produced by Texas Instruments. This integrated circuit is designed to provide general-purpose remote I/O expansion for most microcontroller families via the I2C interface. It operates within a voltage range of 1.65V to 5.5V, making it versatile for various applications. The device includes configuration registers, input and output ports, and polarity inversion capabilities, allowing for flexible configuration and operation.
Key Specifications
| Parameter | Description |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | TCA9555RTWR |
| Package Type | WQFN-24-EP (4x4) |
| Operating Voltage | 1.65V to 5.5V |
| Interface | I2C and SMBus |
| Number of I/Os | 16-bit |
| I2C Bus Speed | 400 kHz |
| Interrupt Output | Open-drain active-low |
| Temperature Range | -40°C to 85°C |
| Standby Current | 3.5 μA maximum |
Key Features
- Low standby-current consumption of 3.5 μA maximum
- I2C to parallel port expander
- Open-drain active-low interrupt output
- 5-V tolerant I/O ports
- Compatible with most microcontrollers
- Configurable slave address with 3 address pins
- Polarity inversion register
- Latched outputs with high-current drive capability for directly driving LEDs
- Latch-up performance exceeds 100 mA per JESD 78, Class II
- ESD protection exceeds JESD 22 – 2000-V human-body model (A114-A) – 1000-V charged-device model (C101).
Applications
- Servers
- Routers (Telecom Switching Equipment)
- Personal Computers
- Personal Electronics
- Industrial Automation Equipment
- Products with GPIO-limited processors.
Q & A
- What is the operating voltage range of the TCA9555RTWR?
The TCA9555RTWR operates within a voltage range of 1.65V to 5.5V.
- What type of interface does the TCA9555RTWR support?
The TCA9555RTWR supports I2C and SMBus interfaces.
- How many I/Os does the TCA9555RTWR provide?
The TCA9555RTWR provides 16-bit I/O expansion.
- What is the maximum standby current consumption of the TCA9555RTWR?
The maximum standby current consumption is 3.5 μA.
- Does the TCA9555RTWR have ESD protection?
Yes, the TCA9555RTWR has ESD protection that exceeds JESD 22 – 2000-V human-body model (A114-A) – 1000-V charged-device model (C101).
- What is the temperature range for the TCA9555RTWR?
The temperature range is -40°C to 85°C.
- Can the TCA9555RTWR drive LEDs directly?
Yes, the TCA9555RTWR has latched outputs with high-current drive capability for directly driving LEDs.
- Is the TCA9555RTWR compatible with most microcontrollers?
Yes, the TCA9555RTWR is compatible with most microcontrollers.
- What is the I2C bus speed of the TCA9555RTWR?
The I2C bus speed is 400 kHz.
- Does the TCA9555RTWR have a configurable slave address?
Yes, the TCA9555RTWR has a configurable slave address with 3 address pins.
