PCA9552PW,112

Overview

The PCA9552PW,112 is a 16-bit I²C-bus LED driver manufactured by NXP Semiconductors. It operates within a supply voltage range of 2.3 V to 5.5 V and features 16 open-drain outputs capable of sinking up to 6.5 mA each. The device utilizes a TSSOP-24 package and supports SMD/SMT mounting. It functions as an LED blinker with programmable internal oscillators for two distinct blink rates, reducing I²C bus traffic. The component operates between -40°C and +85°C, with a maximum power dissipation of 400 mW and a maximum supply current of 350 µA.

Feature Summary

• Integrates an internal oscillator to provide two fully programmable blink rates without external components
• Reduces I²C bus communication load by allowing single-command control of LED on/off states and blinking cycles
• Supports general-purpose parallel input/output expansion for bits not assigned to LED driving

Applications

• I²C-bus applications requiring limited bus traffic
• SMBus applications needing timer resource release from the host controller
• Systems utilizing MCU, MPU, DSP, or chipset controllers where peripheral timers are constrained

Procurement Notes

Verify component authenticity through authorized NXP distributors or certified suppliers. Confirm RoHS compliance status via official documentation. Check for end-of-life or obsolescence notices prior to procurement. Ensure packaging specifications match design requirements. Validate electrical parameters against the latest datasheet revisions.

Selection Notes

Select this component when 16-channel LED control with hardware-based blinking is required. Suitable for designs needing low standby current and SMBus compatibility. Consider thermal limits and output current capabilities relative to the specific LED load. Verify address pin configurations if multiple devices share the same bus.

Part Context

This part belongs to the PCA955x series of I²C-bus LED drivers. It shares functional similarities with the PCA9551 (8-bit) and PCA9553 (4-bit) but offers higher channel density. The series is designed to offload timing tasks from the main processor, optimizing system efficiency in embedded environments.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult NXP technical support for direct replacements or pin-compatible alternatives.