Overview
The TCA9535RTWR, produced by Texas Instruments, is a 16-bit low-voltage I2C and SMBus I/O expander. This device is designed to provide 16 bits of general-purpose parallel input and output expansion for the two-line bidirectional I2C bus or SMBus protocol. It operates with a wide power supply voltage range of 1.65 V to 5.5 V, making it versatile for various applications. The TCA9535RTWR features low standby-current consumption, an open-drain active-low interrupt output, and 5-V tolerant I/O ports. It is available in several package options, including TSSOP, SSOP, VQFN, and WQFN, each with 24 pins.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Power Supply Voltage | 1.65 to 5.5 | V |
| I2C Clock Frequency (Standard Mode) | 0 to 100 | kHz |
| I2C Clock Frequency (Fast Mode) | 0 to 400 | kHz |
| Operating Temperature | -40 to 85 | °C |
| Package Types | TSSOP, SSOP, VQFN, WQFN | |
| Pins | 24 | |
| ESD Protection | 2000-V Human-Body Model, 1000-V Charged-Device Model | |
| Interrupt Output | Open-drain active-low | |
| I/O Port Configuration | Configurable as inputs or outputs |
Key Features
- I2C to Parallel port expander
- Wide power supply voltage range of 1.65 V to 5.5 V
- Low standby-current consumption
- Open-drain active-low interrupt output
- 5-V tolerant I/O ports
- 400-kHz Fast I2C bus
- Polarity inversion register
- Address by three hardware address pins for use of up to eight devices
- Latched outputs with high-current drive capability for directly driving LEDs
- ESD protection exceeds JESD 22 standards
Applications
The TCA9535RTWR is suitable for a variety of applications, including:
- Consumer electronics
- Industrial automation
- Products with GPIO-limited processors
- Automotive systems
- Medical devices
Q & A
- What is the power supply voltage range of the TCA9535RTWR?
The TCA9535RTWR operates with a power supply voltage ranging from 1.65 V to 5.5 V. - What is the maximum I2C clock frequency for the TCA9535RTWR?
The maximum I2C clock frequency for the TCA9535RTWR is 400 kHz in Fast Mode. - What type of interrupt output does the TCA9535RTWR have?
The TCA9535RTWR has an open-drain active-low interrupt output. - How many devices can be addressed using the TCA9535RTWR?
Up to eight devices can be addressed using the three hardware address pins. - What is the ESD protection level of the TCA9535RTWR?
The TCA9535RTWR has ESD protection exceeding 2000-V Human-Body Model and 1000-V Charged-Device Model. - Can the I/O ports be configured as inputs or outputs?
Yes, the I/O ports of the TCA9535RTWR can be configured as either inputs or outputs by writing to the I/O configuration bits. - What is the operating temperature range of the TCA9535RTWR?
The operating temperature range of the TCA9535RTWR is -40°C to 85°C. - What package types are available for the TCA9535RTWR?
The TCA9535RTWR is available in TSSOP, SSOP, VQFN, and WQFN packages. - How many pins does the TCA9535RTWR have?
The TCA9535RTWR has 24 pins. - Does the TCA9535RTWR include internal I/O pull-up resistors?
No, the TCA9535RTWR does not include internal I/O pull-up resistors, requiring external pull-ups and pull-downs on unused I/O pins when configured as inputs and undriven.
