Xinluda Information Technology Co., Ltd. Electronic Parts
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The Xinluda XL8574AT is a remote 8-bit I/O expander that adds eight general-purpose, quasi-bidirectional I/O ports to a microcontroller over a simple two-wire I²C-bus interface (serial clock SCL and serial data SDA). Each port can be independently assigned as an input to monitor keypads or interrupt sources, or as a latched output to drive indicator devices such as LEDs directly. The XL8574AT shares the same pinout and register behavior as the widely used PCF8574A, making it a convenient sourcing alternative for designs that are GPIO-limited.
Three hardware address pins (A0, A1, A2) let up to eight XL8574A devices share a single I²C-bus. Combined with the related XL8574 (different fixed slave-address portion), up to 16 expanders can coexist on one bus, supporting as many as 128 I/Os. An active-LOW, open-drain interrupt output (INT) signals the host MCU whenever an input state changes, eliminating the need for continuous polling. An internal Power-On Reset initializes all I/Os as inputs with a weak 100µA pull-up at HIGH logic levels.
The XL8574AT from Xinluda has limited authorized-distributor coverage in North America and the EU, which can stall production for buyers who need a PCF8574A-compatible I/O expander. Pacific Component Xchange is an independent distributor specializing in hard-to-find and end-of-life power-management ICs and interface devices. We help engineering and procurement teams secure parts like the XL8574AT when mainstream channels show no stock.
Every order is backed by our authenticity and quality-assurance process, with worldwide shipping to keep your line running. Pricing on this part is offered by quotation. Submit an RFQ today and our sourcing team will respond with current availability, lead time, and pricing for the XL8574AT.
The XL8574AT is a Xinluda remote 8-bit I/O expander for the I2C-bus with interrupt. It adds eight quasi-bidirectional general-purpose I/O ports (P0-P7) to a microcontroller over a two-wire interface, with an open-drain interrupt output. It is supplied in a SOP16W (300mil) package.
Yes. The XL8574/XL8574A family is function- and pin-compatible with the industry-standard PCF8574/PCF8574A I2C I/O expanders, making the XL8574AT a practical sourcing alternative for existing designs.
The two devices are electrically identical except for the fixed portion of their I2C slave address. The 3 hardware address pins allow eight of each device on one bus, so using both variants together up to 16 expanders can share a single I2C-bus, supporting as many as 128 I/Os.
The XL8574AT is the SOP16W (300mil) version with topside marking XL8574AT. It operates from -40 C to +85 C, supports a 100kHz Standard-mode I2C clock, and draws only 2.5 uA typical in standby. The family is also offered in DIP16, SOP16 (150mil), and SSOP20.
The datasheet lists an operating power supply range of 2.5V to 6.0V, with a recommended operating supply voltage of 2.3V to 5.5V (VCC max 5.5V). The I/Os are non-overvoltage-tolerant and held to VCC through a 100 uA current source.
The XL8574AT has limited authorized-distributor availability outside Asia. Pacific Component Xchange is an independent distributor that sources hard-to-find parts like this one. Submit an RFQ and our team will provide current availability, lead time, and pricing.
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