Overview
The TCA9534APWR is a 16-pin, 8-bit I²C and SMBus low-power I/O expander manufactured by Texas Instruments. This device is designed to provide additional general-purpose parallel input and output (I/O) expansion for the two-line bidirectional I²C bus (or SMBus) protocol. It operates with a power supply voltage range of 1.65 V to 5.5 V, making it versatile for use with a wide range of devices. The TCA9534A supports both 100-kHz (Standard-mode) and 400-kHz (Fast-mode) clock frequencies, enhancing its compatibility and performance in various applications.
Key Specifications
| Attribute | Description |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | TCA9534APWR |
| Package | TSSOP-16 |
| Operating Voltage | 1.65 V to 5.5 V |
| I²C Bus Frequency | 100 kHz (Standard-mode), 400 kHz (Fast-mode) |
| I/O Ports | 8-bit |
| Interrupt Output | Open-Drain Active-Low |
| Address Pins | Three hardware selectable address pins (A0, A1, A2) |
| ESD Protection | 2000-V Human-Body Model, 1000-V Charged-Device Model |
| Power-On Reset | Internal Power-On Reset |
| Output Drive Capability | Latched outputs with high-current drive capability |
Key Features
- Low Standby Current Consumption
- I²C to Parallel Port Expander
- Open-Drain Active-Low Interrupt Output
- 5-V Tolerant I/O Ports
- 400-kHz Fast I²C Bus
- Three Hardware Address Pins Allow up to Eight Devices on the I²C/SMBus
- Input and Output Configuration Register
- Polarity Inversion Register
- Internal Power-On Reset
- Power-Up With All Channels Configured as Inputs
- No Glitch on Power Up
- Noise Filter on SCL/SDA Inputs
- Latched Outputs With High-Current Drive Maximum Capability for Directly Driving LEDs
- Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
- ESD Protection Exceeds JESD 22
Applications
The TCA9534A is suitable for a variety of applications where additional I/Os are needed. These include:
- Switches and sensors
- Push-buttons and LEDs
- Fans and other similar devices
- Embedded systems requiring I/O expansion
- Industrial control systems
- Consumer electronics
Q & A
- What is the operating voltage range of the TCA9534APWR?
The operating voltage range is from 1.65 V to 5.5 V. - What is the maximum I²C bus frequency supported by the TCA9534A?
The device supports up to 400 kHz in Fast-mode. - How many devices can be connected on the same I²C bus using the TCA9534A?
Up to eight devices can be connected using the three hardware selectable address pins (A0, A1, A2). - What type of interrupt output does the TCA9534A have?
The device has an open-drain active-low interrupt output. - Does the TCA9534A have internal power-on reset?
Yes, it has an internal power-on reset. - What is the ESD protection level of the TCA9534A?
The device has ESD protection exceeding 2000-V Human-Body Model and 1000-V Charged-Device Model. - Can the TCA9534A directly drive LEDs?
Yes, it has latched outputs with high-current drive capability for directly driving LEDs. - What is the package type of the TCA9534APWR?
The package type is TSSOP-16. - Is the TCA9534A RoHS compliant?
Yes, the device is RoHS compliant. - What are some common applications of the TCA9534A?
Common applications include switches, sensors, push-buttons, LEDs, fans, and other similar devices.
