Overview
The PCA9674PW,112 is a remote 8-bit I/O expander produced by NXP USA Inc. This device provides general-purpose remote I/O expansion via the two-line bidirectional I²C-bus (serial clock (SCL), serial data (SDA)). It is part of the Fast-mode Plus (Fm+) I²C-bus family, supporting high-speed data transfer up to 1 MHz.
The PCA9674 and PCA9674A are identical except for their different, non-overlapping slave addresses, allowing up to 126 of these I/O expanders to be connected on the same I²C-bus without the need for bus buffers, supporting up to 1008 I/Os.
Key Specifications
| Parameter | Description |
|---|---|
| Package | TSSOP16 |
| I²C-Bus Interface | Fast-mode Plus (Fm+), up to 1 MHz |
| Supply Voltage | 2.3 V to 5.5 V |
| I/O Pins | 8-bit remote I/O, default to inputs at power-up |
| Output Capability | Latched outputs with 25 mA sink capability |
| Total Package Sink Capability | 200 mA |
| Interrupt Output | Active LOW open-drain interrupt output |
| Slave Addresses | 64 programmable addresses for PCA9674, 62 for PCA9674A |
| Operating Temperature | -40°C to +85°C |
| ESD Protection | Exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101 |
Key Features
- I²C-bus to parallel port expander
- 1 MHz I²C-bus interface (Fast-mode Plus I²C-bus)
- SDA with 30 mA sink capability for 4000 pF buses
- 5.5 V tolerant I/Os held to VDD with 100 μA current source
- Latched outputs with 25 mA sink capability for directly driving LEDs
- Active LOW open-drain interrupt output
- Readable device ID (manufacturer, device type, and revision)
- Software Reset to Power-On Reset state
- Low standby current (4.5 μA typical)
- ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101
Applications
- LED signs and displays
- Servers
- Key pads
- Industrial control
- Medical equipment
- PLCs (Programmable Logic Controllers)
- Cellular telephones
- Mobile devices
- Gaming machines
- Instrumentation and test measurement
Q & A
- What is the PCA9674PW,112 used for?
The PCA9674PW,112 is used for general-purpose remote I/O expansion via the I²C-bus.
- What is the maximum I²C-bus speed supported by the PCA9674PW,112?
The device supports up to 1 MHz I²C-bus speed in Fast-mode Plus.
- How many I/O expanders can be connected on the same I²C-bus?
Up to 126 I/O expanders (PCA9674 and PCA9674A) can be connected on the same I²C-bus.
- What is the operating supply voltage range for the PCA9674PW,112?
The operating supply voltage range is from 2.3 V to 5.5 V.
- What is the total package sink capability of the PCA9674PW,112?
The total package sink capability is 200 mA.
- Does the PCA9674PW,112 have ESD protection?
Yes, it exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101.
- What is the operating temperature range for the PCA9674PW,112?
The operating temperature range is from -40°C to +85°C.
- How many programmable slave addresses does the PCA9674PW,112 have?
The PCA9674 has 64 programmable slave addresses, while the PCA9674A has 62.
- What type of interrupt output does the PCA9674PW,112 have?
The device has an active LOW open-drain interrupt output.
- Can the PCA9674PW,112 be reset via software?
Yes, the device can be reset to its Power-On Reset state via a software reset.
