Overview
The TCA9537DGSR is a 4-bit I/O expander designed for operation with the I2C bus, manufactured by Texas Instruments. This component is engineered to provide general-purpose remote I/O expansion for most microcontroller families, operating within a power-supply voltage range of 1.65 V to 5.5 V. It is particularly useful in applications where additional I/O ports are needed without adding complexity to the system design.
Key Specifications
| Parameter | Value |
|---|---|
| Number of I/Os | 4 |
| Supply voltage (min) | 1.65 V |
| Supply voltage (max) | 5.5 V |
| Frequency (max) | 1 MHz |
| Package | VSSOP (DGS) - 10 pins |
| Operating temperature range | -40°C to 125°C |
| ESD protection | 2000-V Human-body model (A114-A), 1000-V Charged-device model (C101) |
Key Features
- I2C to GPIO expander
- Operating power-supply voltage range of 1.65 V to 5.5 V
- 5-V Tolerant I/O ports
- Software Reset via I2C General Call
- RESET input pin for external reset control
- Dedicated INT output
- 1-MHz Fast mode plus I2C bus
- Input and output configuration register
- Polarity inversion register
- Internal power-on reset
- Power-up with all channels configured as inputs
- Noise filter on SCL and SDA inputs
- Latched outputs with high-current drive maximum capability for directly driving LEDs
Applications
The TCA9537DGSR is suitable for a variety of applications where additional I/O ports are required, such as in industrial control systems, consumer electronics, and automotive systems. It is particularly useful in scenarios where microcontrollers need to control or monitor multiple devices but lack sufficient I/O ports. The component's ability to operate over a wide voltage range and its robust ESD protection make it a reliable choice for diverse environments.
Q & A
- Q: What is the operating voltage range of the TCA9537DGSR?
A: The TCA9537DGSR operates within a power-supply voltage range of 1.65 V to 5.5 V. - Q: How many I/O ports does the TCA9537DGSR provide?
A: The TCA9537DGSR provides 4 I/O ports. - Q: What is the maximum frequency of the I2C bus for the TCA9537DGSR?
A: The maximum frequency of the I2C bus for the TCA9537DGSR is 1 MHz. - Q: Does the TCA9537DGSR have ESD protection?
A: Yes, the TCA9537DGSR has ESD protection exceeding JESD 22 standards, including 2000-V Human-body model (A114-A) and 1000-V Charged-device model (C101). - Q: How can the TCA9537DGSR be reset?
A: The TCA9537DGSR can be reset using either a software reset via an I2C General Call or a hard reset using the RESET input pin. - Q: What is the purpose of the INT output on the TCA9537DGSR?
A: The INT output is an open-drain interrupt output that is activated when any input differs from its corresponding Input Port register state, indicating to the system controller that an input state has changed. - Q: Can the TCA9537DGSR drive LEDs directly?
A: Yes, the TCA9537DGSR has latched outputs with high-current drive capability, allowing it to directly drive LEDs. - Q: What is the package type of the TCA9537DGSR?
A: The TCA9537DGSR is packaged in a VSSOP (DGS) with 10 pins. - Q: What is the operating temperature range of the TCA9537DGSR?
A: The TCA9537DGSR operates within an temperature range of -40°C to 125°C. - Q: Does the TCA9537DGSR have noise filters on its SCL and SDA inputs?
A: Yes, the TCA9537DGSR includes noise filters on its SCL and SDA inputs.
