Shenzhen Xinluda Information Technology Co., Ltd Electronic Parts
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The XL9555QF24 from Xinluda (Shenzhen Xinluda Information Technology Co., Ltd) is a 16-bit I2C-bus and SMBus I/O port expander that adds general-purpose parallel input/output (GPIO) to virtually any microcontroller-based system over a simple two-wire serial interface. The QF24 suffix denotes the surface-mount QFN-24 (QFN24-4×4) package. With an open-drain active-LOW interrupt output and configuration registers, the XL9555QF24 lets a host MCU monitor input transitions without continuous polling, making it well suited to designs where I/O pins are scarce.
The XL9555QF24 has limited authorized-distributor availability, which can stall production for buyers who need it in volume or on short lead times. Pacific Component Xchange specializes in hard-to-find and allocated interface and I/O devices like this one. We provide authenticity-verified sourcing, global shipping, and responsive quoting for both prototype and production quantities. Request a quote (RFQ) for the XL9555QF24 today and our team will confirm availability, lead time, and pricing for your required quantity.
The XL9555QF24 is Xinluda's 16-bit I2C-bus and SMBus I/O port expander with interrupt output and configuration registers, supplied in a QFN-24 package. It adds 16 general-purpose I/O lines to a host microcontroller over a two-wire serial interface.
The QF24 suffix indicates the surface-mount QFN-24 (QFN24-4x4) package. The same XL9555 die is also offered by Xinluda in other packages such as TSSOP-24, SSOP-24, and SOP-24.
It operates from 2.3 V to 5.5 V and communicates over a 400 kHz fast-mode I2C-bus / SMBus interface. Its I/O ports are 5 V tolerant.
Up to 8 devices can be addressed on a single I2C bus using the three hardware address pins (A0, A1, A2).
Per the datasheet, the operating supply current (ICC) is typically 135 uA and 200 uA maximum at 5.5 V with fSCL = 100 kHz and no load. Standby current is even lower for most pin states.
Yes. The XL9555QF24 is available through Pacific Component Xchange. Because it has limited authorized-distributor stock, it is offered on a request-for-quote (RFQ) basis so we can confirm current availability, lead time, and pricing for your quantity.
Yes. It provides an open-drain, active-LOW interrupt (INT) output that flags changes in input state, allowing the host MCU to respond to events without continuous polling.
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