Overview
The PCA9674APW,112 is a remote 8-bit I/O expander produced by NXP USA Inc. This component is designed to provide general-purpose remote I/O expansion via the two-line bidirectional I²C-bus. It is part of the PCA9674 and PCA9674A series, which are identical except for their different, non-overlapping slave addresses. This device is particularly useful in applications requiring multiple I/O expansions on the same I²C-bus without the need for bus buffers.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | NXP Semiconductors / Freescale |
| Part Number | PCA9674APW,112 |
| Description | IC I/O EXPANDER I2C 8B 16TSSOP |
| Package / Case | 16-TSSOP (0.173", 4.40mm Width) |
| Supply Voltage | 2.3 V ~ 5.5 V |
| Operating Temperature | -40°C ~ 85°C |
| Number of I/O | 8 |
| Mounting Type | Surface Mount |
| Interrupt Output | Yes, Active LOW open-drain |
| Interface | I²C (Fast-mode Plus) |
| Clock Frequency | 1 MHz |
| Output Type | Push-Pull |
| Output Current | 100µA, 25mA |
Key Features
- I²C-bus to parallel port expander with Fast-mode Plus I²C-bus interface (1 MHz)
- SDA with 30 mA sink capability for 4000 pF buses
- Operating supply voltage 2.3 V to 5.5 V with 5.5 V tolerant I/Os held to VDD with 100 µA current source
- 8-bit remote I/O pins that default to inputs at power-up
- Latched outputs with 25 mA sink capability for directly driving LEDs
- Total package sink capability of 200 mA
- Active LOW open-drain interrupt output
- Sixty-four programmable slave addresses using three address pins (PCA9674A - sixty-two)
- Readable device ID (manufacturer, device type, and revision)
- Software Reset pushes the device back 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
- Latch-up testing is done to JEDEC standard JESD78 which exceeds 100 mA
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 PCA9674APW,112 used for?
The PCA9674APW,112 is used for remote 8-bit I/O expansion via the I²C-bus, providing additional I/O ports for microcontrollers.
- What is the operating voltage range of the PCA9674APW,112?
The operating supply voltage range is 2.3 V to 5.5 V.
- What is the maximum clock frequency of the I²C-bus interface?
The maximum clock frequency is 1 MHz (Fast-mode Plus I²C-bus).
- How many I/O pins does the PCA9674APW,112 have?
The device has 8 remote I/O pins.
- What is the purpose of the interrupt output on the PCA9674APW,112?
The active LOW open-drain interrupt output is used to indicate to the microcontroller that an input state has changed, eliminating the need for continuous polling.
- How many slave addresses can be programmed using the PCA9674APW,112?
The PCA9674 can be programmed to 64 different slave addresses, while the PCA9674A can be programmed to 62 different slave addresses.
- What is the standby current of the PCA9674APW,112?
The standby current is typically 4.5 µA.
- What are the ESD protection levels for the PCA9674APW,112?
The device has ESD protection that exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101.
- What types of packages are available for the PCA9674APW,112?
The device is available in SO16, TSSOP16, and HVQFN16 packages.
- What is the operating temperature range of the PCA9674APW,112?
The operating temperature range is -40°C to +85°C.
- Can the PCA9674APW,112 drive LEDs directly?
Yes, the latched outputs have a 25 mA sink capability, which is sufficient for directly driving LEDs.
