Shenzhen Xinluda Information Technology Electronic Parts
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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.
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.
The XD8574AP is an 8-bit remote I/O expander with an I2C-bus interface from Xinluda (part of the XL8574/XL8574A family). It provides eight quasi-bidirectional general-purpose I/O ports plus an active-LOW open-drain interrupt output, in a DIP-16 package.
Yes. The XD8574AP is functionally compatible with the industry-standard PCF8574A I/O expander, so it can serve as an alternative in many designs that use the PCF8574 family. Always validate the I2C address and electrical parameters against the datasheet for your specific application.
As with the PCF8574/PCF8574A family, the suffixed 'A' version (XD8574A / XD8574AP) uses a different fixed portion of the I2C slave address than the non-A version, allowing both types to coexist on the same bus. Confirm the exact address range in the datasheet before designing in.
The XD8574AP is supplied in a through-hole DIP-16 (300 mil) package and operates over a recommended supply voltage range of 2.3 V to 5.5 V, with an operating temperature range of -40 C to +85 C.
Using its three hardware address inputs (A0, A1, A2), up to eight XD8574A devices can be addressed on a single I2C bus, expanding a system to as many as 64 I/O lines over one two-wire connection. Combining 'A' and non-'A' variants allows up to 16 devices and 128 I/O lines on the same bus.
The XD8574AP is offered on a request-for-quote basis because authorized-distributor stock is limited. Submit an RFQ to Pacific Component Xchange with your quantity and delivery needs, and our sourcing team will respond with current pricing, lead time, and availability.
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