PCA9533DP/01,118

Overview

The PCA9533DP/01,118 is a 4-bit I2C LED dimmer IC manufactured by NXP USA Inc. It features linear I2C dimming with an output current of 25mA per channel. The device operates on a supply voltage ranging from 2.3V to 5.5V and supports clock frequencies up to 400kHz. It is housed in an 8-TSSOP surface-mount package and functions within a temperature range of -40°C to 85°C.

Feature Summary

• Provides 4-bit I2C bus and SMBus I/O expansion specifically optimized for RGB color mixing and backlight applications.
• Enables 256-step brightness control through programmable PWM signals generated by an internal oscillator.
• Supports two user-programmable blink rates and duty cycles for independent LED flashing control.

Applications

• RGB color mixing systems
• Display backlighting
• General purpose input/output expansion

Procurement Notes

Verify the specific suffix /01,118 against official NXP documentation to confirm fixed I2C address configuration. Ensure the 8-TSSOP package dimensions match the target PCB footprint. Confirm RoHS3 compliance status if required by project specifications before finalizing procurement.

Selection Notes

Select this component when precise I2C-controlled LED dimming is required without external timing components. It is suitable for designs needing multiple independently controlled LEDs or general-purpose I/O expansion on a single serial bus. Consider the 25mA sink current limit per channel when sizing the load.

Part Context

This part belongs to the PCA9533 family of LED controllers designed for low-pin-count applications. It integrates PWM functionality directly into an I/O expander architecture, allowing flexible use as either a dedicated LED driver or a standard GPIO expander depending on system requirements.

Replacement Considerations

PCA9533DP/02,118 offers a different fixed I2C address for multi-device bus operation.