PCA9532D,118

Overview

The PCA9532D,118 is a 16-bit I²C-bus LED dimmer IC from NXP Semiconductors. It features an internal oscillator with two user-programmable blink rates and duty cycles coupled to output PWM for RGB color mixing and backlight applications. 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 24-SOIC (7.50 mm wide) surface-mount package.

Feature Summary

• Integrates an internal oscillator allowing programmable blink rates and duty cycles without external components
• Supports 256 discrete brightness steps for Red/Green/Blue color mixing via PWM control
• Includes hardware address pins enabling multiple devices to operate on the same I²C bus
• Features active LOW hardware reset and Power-On Reset for reliable initialization

Applications

• RGB color mixing systems
• Backlight illumination control
• General-purpose parallel input/output expansion

Procurement Notes

Verify the specific suffix against official documentation to confirm package type and tape/reel specifications. Confirm RoHS compliance status and lead times through authorized distributors. Ensure ESD handling protocols are followed during storage and assembly. Cross-reference the manufacturer part number with distributor codes to avoid ordering errors.

Selection Notes

Select this component when 16 independent LED channels with programmable blinking are required. It is suitable for applications needing reduced I²C bus traffic by offloading blink timing to the hardware. Consider the 25 mA per channel sink capability and the 24-pin SOIC footprint for PCB layout constraints.

Part Context

This part belongs to the PCA9532 family of I²C-bus LED dimmers. It is functionally similar to other NXP expanders like the PCA9555 but optimized for LED control with integrated PWM capabilities. The 'D' suffix indicates a SOIC package variant, distinct from the PW (TSSOP) version.

Replacement Considerations

Publicly confirmed substitute: PCA9532PW,118.