XD8574AP – I/O Expander – Xinluda

The Xinluda XD8574AP is an 8-bit remote I/O expander with an I2C-bus interface in a DIP-16 package, providing eight quasi-bidirectional ports plus an open-drain interrupt output. PCF8574-compatible and available by RFQ from Pacific Component Xchange.

The Xinluda XD8574AP is an 8-bit remote input/output (I/O) port expander designed for the two-wire bidirectional I2C bus. It adds eight general-purpose quasi-bidirectional I/O lines to a microcontroller or processor that is short on GPIO, using only the serial data (SDA) and serial clock (SCL) lines. The device belongs to the XL8574/XL8574A family and is functionally compatible with the industry-standard PCF8574/PCF8574A interface, making it a practical alternative for designs that have GPIO-limited host processors.

Each of the eight ports can be independently used as an input or an output. An active-LOW open-drain interrupt (INT) output signals the host whenever an input port changes state, allowing event-driven polling instead of continuous bus traffic. The latched outputs can directly drive LEDs, and the device is addressed by three hardware address pins (A0, A1, A2), so up to eight XD8574A devices can share a single I2C bus, expanding a system to as many as 64 I/O lines on one two-wire connection.

Key Features

• 8-bit remote I/O expander for the I2C bus with eight quasi-bidirectional ports
• I2C-bus serial interface (SDA/SCL), 100 kHz bus clock frequency
• Supply voltage range of 2.3 V to 5.5 V (recommended operating conditions)
• Active-LOW open-drain interrupt output (INT) for input state-change detection
• Latched outputs capable of directly driving LEDs
• Low standby current, typically 2.5 uA
• Three hardware address inputs allow up to 8 devices on one bus
• Total package sink capability of 80 mA
• Operating temperature range of -40 C to +85 C
• DIP-16 (300 mil) through-hole package
• Functionally compatible with the PCF8574A I/O expander

Applications

• GPIO expansion for microcontrollers and SoCs with limited I/O
• LED signage, status indicators, and displays
• Keypads and front-panel control interfaces
• Industrial control, PLCs, and instrumentation
• Servers and networking equipment
• Medical and test-and-measurement equipment

Why Source XD8574AP from Pacific Component Xchange

The XD8574AP is a specialty Xinluda part with little to no authorized-distributor stock in Western markets, which can stall production for buyers who need a verified, trusted and guaranteed supply. Pacific Component Xchange is an independent distributor focused on hard-to-find and obsolete power-management ICs and interface components. We help engineering and procurement teams secure parts like the XD8574AP that are difficult to source through mainstream channels.

Every order is backed by our commitment to authenticity and quality, with global shipping to keep your line running. Because the XD8574AP is offered on a request-for-quote basis, contact Pacific Component Xchange for current pricing, lead time, and availability. Submit an RFQ today and our sourcing team will respond with verified options for your quantity and delivery requirements.