XL9555QF24 – I/O Expander – Xinluda

The Xinluda XL9555QF24 is a 16-bit I2C-bus and SMBus I/O port expander with interrupt output and configuration registers, supplied in a QFN-24 package. Available for RFQ at Pacific Component Xchange.

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.

Key Features

• 16 bits (16 channels) of bidirectional GPIO expansion via I2C-bus / SMBus
• Operating supply voltage range of 2.3 V to 5.5 V
• 400 kHz fast-mode I2C-bus clock frequency
• Up to 8 devices addressable on one bus via 3 hardware address pins (A0, A1, A2)
• Open-drain active-LOW interrupt (INT) output to flag input state changes
• 5 V tolerant I/O ports
• High-level output current (IOH) rated to 10 mA; low-level output current (IOL) rated to 25 mA (recommended operating conditions)
• Low operating supply current (ICC): 135 uA typical, 200 uA maximum at 5.5 V, fSCL = 100 kHz
• 16 I/O pins default to inputs at power-up
• Internal power-on reset
• Industrial operating temperature range of -40 C to +85 C
• RoHS compliant QFN-24 surface-mount package

Applications

• I/O port expansion for microcontrollers and SoCs
• Keypad, push-button and switch sensing
• LED, fan and relay control
• Sensor and status-signal monitoring
• General industrial and consumer control panels

Why Source XL9555QF24 from Pacific Component Xchange

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.