Overview
The PCA9674ABS,118 is a remote 8-bit I/O expander produced by NXP USA Inc., designed to provide general-purpose remote I/O expansion via the two-line bidirectional I²C-bus. This device is part of the Fast-mode Plus (Fm+) family, supporting high-speed data transfer up to 1 MHz. It is available in the HVQFN16 package and is suitable for a wide range of applications requiring additional I/O ports.
Key Specifications
| Specification | Value |
|---|---|
| Interface | 2-line bidirectional I²C-bus (SCL, SDA) |
| I²C-bus Speed | Up to 1 MHz (Fast-mode Plus) |
| Number of I/O Ports | 8 quasi-bidirectional ports |
| Package Type | HVQFN16 |
| Operating Temperature | -40°C to +85°C |
| Standby Current | Typical 4.5 μA |
| ESD Protection | Exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101 |
| Addressing Capability | Up to 64 addresses for PCA9674, up to 62 addresses for PCA9674A |
Key Features
- Readable device ID (manufacturer, device type, and revision)
- Software Reset capability to return the device to Power-On Reset state
- Active LOW open-drain interrupt output (INT) for indicating input state changes
- Internal Power-On Reset (POR) initializes I/Os as inputs with a weak internal pull-up 100 μA current source
- Support for PWM dimming of LEDs and higher I²C-bus drive (30 mA)
- Low standby current and high ESD protection
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 PCA9674ABS,118 used for?
The PCA9674ABS,118 is used for general-purpose remote I/O expansion via the I²C-bus.
- What is the maximum I²C-bus speed supported by the PCA9674ABS,118?
The device supports up to 1 MHz I²C-bus speed in Fast-mode Plus.
- How many I/O ports does the PCA9674ABS,118 have?
The device has 8 quasi-bidirectional I/O ports.
- What is the operating temperature range of the PCA9674ABS,118?
The operating temperature range is -40°C to +85°C.
- Does the PCA9674ABS,118 support software reset?
Yes, the device supports software reset to return it to the Power-On Reset state.
- How many devices of this type can be connected on the same I²C-bus?
Up to 126 devices (64 PCA9674 and 62 PCA9674A) can be connected on the same I²C-bus.
- What is the standby current of the PCA9674ABS,118?
The typical standby current is 4.5 μA.
- What kind of ESD protection does the PCA9674ABS,118 have?
The device exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101 in ESD protection.
- Can the PCA9674ABS,118 be used for PWM dimming of LEDs?
Yes, the device supports PWM dimming of LEDs.
- What are some common applications of the PCA9674ABS,118?
Common applications include LED signs, servers, key pads, industrial control, medical equipment, and more.
