Overview
The PCA9673BS,118 is a remote 16-bit I/O expander produced by NXP USA Inc. This component is designed to provide general-purpose remote I/O expansion for most microcontroller families via the two-line bidirectional I²C-bus. It is part of the Fast-mode Plus (Fm+) family, offering enhanced performance compared to its predecessor, the PCF8575. The PCA9673 is notable for its higher I²C-bus speeds of up to 1 MHz, higher drive capability, and increased total package sink capacity, making it suitable for a variety of applications requiring robust I/O expansion.
Key Specifications
| Specification | Value |
|---|---|
| I²C-bus Interface Speed | Up to 1 MHz (Fast-mode Plus) |
| Number of I/O Pins | 16-bit |
| Output Drive Capability | 25 mA per pin, 400 mA total package sink |
| Operating Voltage | 2.3 V to 5.5 V |
| I/O Voltage Tolerance | 5.5 V tolerant |
| Interrupt Output | Active LOW open-drain |
| Slave Addresses | 16 programmable addresses using 2 address pins |
| Operating Temperature | -40°C to +85°C |
| ESD Protection | Exceeds 2000 V HBM and 1000 V CDM |
| Packages Available | SO24, TSSOP24, HVQFN24, DHVQFN24 |
Key Features
- Compliant with I²C-bus Fast and Standard modes
- SDA with 30 mA sink capability for 4000 pF buses
- Latched outputs with 25 mA sink capability for directly driving LEDs
- Low standby current
- Internal Power-On Reset (POR), hardware reset pin (RESET), and software reset sequence
- Readable device ID (manufacturer, device type, and revision)
- Interrupt line (INT) for informing the microcontroller of incoming data without I²C-bus communication
Applications
- LED signs and displays
- Servers
- Industrial control systems
- Medical equipment
- Programmable Logic Controllers (PLCs)
- Cellular telephones
Q & A
- What is the PCA9673BS,118 used for?
The PCA9673BS,118 is used for general-purpose remote I/O expansion for most microcontroller families via the I²C-bus.
- What are the key improvements over the PCF8575?
The PCA9673 offers higher I²C-bus speeds (1 MHz vs 400 kHz), higher drive capability (30 mA vs 3 mA), and increased total package sink capacity (400 mA vs 100 mA).
- What is the operating voltage range of the PCA9673BS,118?
The operating voltage range is 2.3 V to 5.5 V.
- How many programmable slave addresses does the PCA9673BS,118 support?
The PCA9673BS,118 supports 16 programmable slave addresses using 2 address pins.
- What is the purpose of the interrupt line (INT) on the PCA9673BS,118?
The interrupt line (INT) informs the microcontroller of incoming data on the I/O ports without needing to communicate via the I²C-bus.
- What are the available package types for the PCA9673BS,118?
The available packages include SO24, TSSOP24, HVQFN24, and DHVQFN24.
- What is the maximum current drive capability per pin?
The maximum current drive capability per pin is 25 mA.
- Does the PCA9673BS,118 have ESD protection?
- What is the operating temperature range of the PCA9673BS,118?
The operating temperature range is -40°C to +85°C.
- Is the PCA9673BS,118 still in production?
No, the PCA9673BS,118 is obsolete and no longer manufactured.
