PCA9532PW,112

Overview

The PCA9532PW,112 is a 16-bit I²C-bus and SMBus I/O expander optimized for LED dimming applications. It features an internal oscillator with two user-programmable blink rates and duty cycles coupled to the output PWM. The device provides open-drain outputs that directly drive LEDs with a maximum sink current of 25 mA per bit and 200 mA per package. It operates within a supply voltage range of 2.3 V to 5.5 V and supports clock frequencies up to 400 kHz. The component is housed in a TSSOP-24 surface-mount package.

Feature Summary

• Integrated 16-channel LED driver with programmable PWM brightness control
• Internal oscillator supporting two user-defined blink rates and duty cycles
• Open-drain outputs capable of direct LED driving with high sink current capacity
• Hardware address pins enabling multiple devices on a single I²C bus

Applications

• Red/Green/Blue (RGB) color mixing systems
• Display backlight brightness adjustment
• General-purpose parallel input/output expansion
• ACPI power switch and sensor monitoring interfaces

Procurement Notes

Verify the specific suffix '112' against official NXP documentation to confirm exact ordering code and availability status. Ensure compatibility with target I²C bus voltage levels and check for any regional distribution restrictions or lifecycle notices prior to finalizing procurement plans.

Selection Notes

Select this component when precise multi-level LED dimming is required without external timing components. The integrated oscillator simplifies design by eliminating need for external crystals. Consider the 25 mA per channel limit and total package current constraints when sizing loads for high-density LED arrays.

Part Context

This part belongs to the PCA9532 series of I²C-bus LED dimmers. It differs from standard GPIO expanders by including dedicated hardware for PWM generation and blink rate control. The family is designed to reduce microcontroller load by handling LED state transitions autonomously after initial programming.

Replacement Considerations

PCA9532PW,118