Overview
The TCA9534PWR is an I/O expander designed by Texas Instruments for use with the I2C bus. This component is particularly useful for expanding the digital input/output capabilities of various devices. It features 16 open-drain active-low interrupt outputs, which enable efficient communication and control of connected devices. The device is packaged in a compact 16-pin TSSOP (Thin Small Outline Package) and operates within a wide power supply voltage range of 1.65V to 5.5V, making it suitable for a variety of applications including LED dimming, display control, and industrial automation systems.
Key Specifications
| Parameter | Specification |
|---|---|
| Package Type | TSSOP-16 |
| Operating Voltage Range | 1.65V to 5.5V |
| I2C Bus Frequency | 100kHz (Standard-mode), 400kHz (Fast-mode) |
| Interrupt Output | Open-drain, active-low |
| Address Pins | Three hardware selectable address pins (A0, A1, A2) |
| ESD Protection | Exceeds JESD 22 standards (2000-V Human-Body Model, 1000-V Charged-Device Model) |
| Operating Temperature Range | -40°C to 85°C |
| I/O Port Tolerance | 5-V tolerant I/O ports |
Key Features
- Interrupt Function: Generates a signal on the INT pin to notify the master when an input port changes state.
- Hardware Selectable Address Pins: Allows up to eight TCA9534 devices to coexist on the same I2C bus.
- Low Standby Current: Minimizes power usage when not in active use.
- I2C to Parallel Port Expander: Facilitates communication between a microcontroller and external devices.
- ESD Protection: Exceeds JESD 22 standards, providing robust protection against electrostatic discharge.
- Wide Power Supply Range: Operates effectively across 1.65V to 5.5V supply voltages.
- Latched Outputs with High-Current Drive: Capable of directly driving LEDs.
- No Glitch on Power Up: Ensures stable operation during power-up.
- Noise Filter on SCL/SDA Inputs: Enhances reliability by filtering out noise.
Applications
- LED Dimming: Suitable for controlling and dimming LEDs in various lighting systems.
- Display Control: Used in display dimming and control applications.
- Industrial Automation: Enhances I/O capabilities in industrial automation systems.
- Consumer Electronics: Used in personal electronics such as gaming consoles and personal computers.
- Telecom Switching Equipment: Applied in servers, routers, and other telecom equipment.
- General-Purpose I/O Expansion: Expands I/O capabilities for devices with GPIO-limited processors.
Q & A
- What is the TCA9534PWR used for?
The TCA9534PWR is an I/O expander used to expand the digital input/output capabilities of various devices, particularly those using the I2C bus.
- What is the operating voltage range of the TCA9534PWR?
The TCA9534PWR operates within a voltage range of 1.65V to 5.5V.
- What types of I2C bus frequencies does the TCA9534PWR support?
The TCA9534PWR supports both 100kHz (Standard-mode) and 400kHz (Fast-mode) I2C bus frequencies.
- How many devices can coexist on the same I2C bus using the TCA9534PWR?
Up to eight TCA9534 devices can coexist on the same I2C bus due to the three hardware selectable address pins (A0, A1, A2).
- What kind of ESD protection does the TCA9534PWR offer?
The TCA9534PWR exceeds JESD 22 standards for ESD protection, including 2000-V Human-Body Model and 1000-V Charged-Device Model.
- What is the operating temperature range of the TCA9534PWR?
The TCA9534PWR operates within a temperature range of -40°C to 85°C.
- Does the TCA9534PWR have any noise filtering capabilities?
Yes, the TCA9534PWR includes noise filters on SCL/SDA inputs to enhance reliability.
- Can the TCA9534PWR directly drive LEDs?
Yes, the TCA9534PWR has latched outputs with high-current drive capability, making it suitable for directly driving LEDs.
- What is the package type of the TCA9534PWR?
The TCA9534PWR is packaged in a 16-pin TSSOP (Thin Small Outline Package).
- What are some common applications of the TCA9534PWR?
Common applications include LED dimming, display control, industrial automation, and general-purpose I/O expansion in various devices.
