PCA9533D/01,118

Overview

The PCA9533D/01,118 is a 4-bit LED driver IC manufactured by NXP Semiconductors. It operates on an I²C bus and SMBus interface with a supply voltage range of 2.3 V to 5.5 V. The device provides four open-drain outputs capable of driving LEDs up to 25 mA each. It features programmable blink rates ranging from 0.591 Hz to 152 Hz, offering 256 brightness levels for dimming control. The component includes an internal oscillator, eliminating the need for external timing components, and supports hot insertion without pulse interference.

Feature Summary

• Four independent open-drain outputs directly drive LEDs up to 25 mA per channel
• Programmable blink functionality with two selectable frequencies and adjustable duty cycles
• Integrated internal oscillator removes requirement for external timing components
• I²C/SMBus compatible interface with noise filters on SCL and SDA inputs

Applications

• LED backlighting systems
• Status indicator lighting
• General-purpose GPIO expansion via unused output pins

Procurement Notes

Verify the specific suffix '01' to confirm the fixed I²C address configuration, as the '/02' variant utilizes a different address. Ensure the package type matches the design requirements, as this part number corresponds to the TSSOP8 or MSOP8 form factor. Confirm RoHS compliance status and check for any obsolescence notices from NXP before finalizing procurement plans.

Selection Notes

Select this component when precise LED intensity control and programmable blinking are required within a compact footprint. It is suitable for designs needing multiple LED channels controlled via a standard serial bus. Consider the 25 mA output limit per pin when sizing current requirements. Verify that the system power supply falls within the 2.3 V to 5.5 V operating range.

Part Context

This device belongs to the PCA9533 family of low-power LED controllers designed for I²C bus applications. It serves as a dedicated solution for managing LED arrays where software-controlled brightness and blinking patterns are necessary. The family allows multiple units on a single bus through distinct address configurations provided by the /01 and /02 variants.

Replacement Considerations

PCA9533DP/02,118 shares identical functional specifications but uses a different fixed I²C address.