Overview
The PCA9574PW,118 is a CMOS device developed by NXP USA Inc. that provides 8 bits of General Purpose parallel Input/Output (GPIO) expansion. This device is designed for use in low voltage processor and handheld battery-powered mobile applications. It enhances the NXP family of I²C-bus I/O expanders with features such as lower supply current, lower operating voltage, and dual and separate supply rails for voltage level translation. The device supports a 400 kHz clock frequency and is available in compact packaging options like TSSOP16 and HVQFN16.
Key Specifications
| Parameter | Value |
|---|---|
| Number of GPIOs | 8 bits |
| Operating Voltage | 1.1 V to 3.6 V |
| Clock Frequency | 400 kHz |
| Package Types | TSSOP16, HVQFN16 |
| Operating Temperature Range | -40 °C to +85 °C |
| Interface | I²C-bus, SMBus |
| Pin Count | 16 |
| RoHS Status | ROHS3 Compliant |
Key Features
- Provides 8 bits of General Purpose parallel Input/Output (GPIO) expansion.
- Low supply current and operating voltage (1.1 V to 3.6 V).
- Dual and separate supply rails for voltage level translation.
- 400 kHz clock frequency.
- Each I/O port can be configured as an input or output independently.
- Built-in level shifting feature for mixed signal environments.
- Bus-hold with programmable on-chip pull-up or pull-down feature for I/Os.
- Open-drain interrupt output pin (INT) for monitoring input pins.
- ‘GPIO All Call’ command for programming multiple devices simultaneously.
- Internal Power-On Reset (POR) or hardware reset pin (RESET) for initialization.
Applications
- Battery-powered mobile applications.
- Clamshell devices.
- Interfacing to sensors, push buttons, and keypads.
- Voltage level translation between processor and I/O devices operating at different voltage levels.
- Mixed signal environments requiring communication between incompatible I/Os.
Q & A
- What is the PCA9574PW,118 used for?
The PCA9574PW,118 is used for providing 8 bits of General Purpose parallel Input/Output (GPIO) expansion in low voltage processor and handheld battery-powered mobile applications.
- What are the operating voltage ranges for the PCA9574PW,118?
The device operates within a voltage range of 1.1 V to 3.6 V.
- What is the clock frequency of the PCA9574PW,118?
The clock frequency is 400 kHz.
- What package types are available for the PCA9574PW,118?
The device is available in TSSOP16 and HVQFN16 packages.
- What is the operating temperature range for the PCA9574PW,118?
The operating temperature range is -40 °C to +85 °C.
- Can each I/O port be configured independently?
Yes, each of the eight I/O ports can be configured as an input or output independently.
- Does the PCA9574PW,118 support level shifting?
Yes, it has a built-in level shifting feature for mixed signal environments.
- What is the purpose of the ‘GPIO All Call’ command?
The ‘GPIO All Call’ command allows programming multiple PCA9574 devices simultaneously, even if they have different individual I²C-bus addresses.
- How does the device handle power-on reset?
The device has an internal Power-On Reset (POR) or hardware reset pin (RESET) that initializes the eight I/Os as inputs and sets the registers to their default values.
- Is the PCA9574PW,118 RoHS compliant?
Yes, the PCA9574PW,118 is ROHS3 compliant.
