Overview
The TCA9555RGER, produced by Texas Instruments, is a 16-bit low-voltage I2C and SMBus I/O expander designed for general-purpose remote I/O expansion. It operates within a voltage range of 1.65-V to 5.5-V and is compatible with most microcontroller families via the I2C interface. This device is particularly useful for expanding the I/O capabilities of microcontrollers in various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Voltage Range | 1.65 to 5.5 | V |
| I2C Clock Frequency | Up to 400 kHz | kHz |
| Standby Current Consumption | 3.5 µA (Maximum) | µA |
| Output Drive Capability | Up to 25 mA (Tj ≤ 65°C) | mA |
| ESD Protection | 2000-V Human-Body Model, 1000-V Charged-Device Model | V |
| Address Pins | 3 (A0, A1, A2) | - |
| Package Options | TSSOP (24), SSOP (24), WQFN (24), VQFN (24) | - |
| Operating Temperature Range | -40 to 85 | °C |
Key Features
- 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
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 TCA9555RGER?
The operating voltage range is 1.65-V to 5.5-V. - What is the maximum I2C clock frequency supported by the TCA9555RGER?
The maximum I2C clock frequency is up to 400 kHz. - How many address pins does the TCA9555RGER have?
The device has 3 address pins (A0, A1, A2). - What is the standby current consumption of the TCA9555RGER?
The standby current consumption is 3.5 µA maximum. - Is the TCA9555RGER ESD protected?
Yes, it exceeds JESD 22 standards with 2000-V Human-Body Model and 1000-V Charged-Device Model protection. - What are the package options available for the TCA9555RGER?
The package options include TSSOP (24), SSOP (24), WQFN (24), and VQFN (24). - Can the TCA9555RGER drive LEDs directly?
Yes, it has latched outputs with high-current drive capability for directly driving LEDs. - What is the operating temperature range of the TCA9555RGER?
The operating temperature range is -40 to 85 °C. - Is the TCA9555RGER compatible with most microcontrollers?
Yes, it is compatible with most microcontroller families via the I2C interface. - How many devices can share the same I2C bus or SMBus?
Up to eight TCA9555 devices can share the same I2C bus or SMBus.
