PCA9532BS,118

Overview

The PCA9532BS,118 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 package.

Feature Summary

• Integrated internal oscillator supporting two programmable blink rates and duty cycles for hardware-controlled LED flashing without bus intervention
• Direct LED driving capability via open-drain outputs with specified sink current limits per bit and per package
• Hardware address pins enabling multiple devices to operate on the same I²C bus simultaneously

Applications

• RGB color mixing systems requiring discrete step dimming control
• Display backlight brightness adjustment applications
• General Purpose Input/Output (GPIO) expansion for sensors or switches

Procurement Notes

Verify the specific suffix '118' corresponds to the TSSOP-24 reel packaging configuration as listed in official NXP documentation. Confirm the active status of this specific variant against current production schedules. Ensure compatibility with the target system's I²C voltage levels and interface requirements before finalizing procurement orders.

Selection Notes

Select this component when hardware-based LED blinking and dimming are required to reduce microcontroller load. It is suitable for designs needing direct LED drive capability without external transistors. Consider the 16-bit capacity and available GPIO flexibility if additional digital inputs or outputs are needed alongside lighting control functions.

Part Context

This part belongs to the PCA9532 series of I²C-bus I/O expanders designed specifically for LED applications. It differs from standard GPIO expanders by integrating dedicated PWM functionality and internal oscillators. The BS suffix typically denotes the HVQFN package variant in some contexts, but the datasheet specifies TSSOP-24 for this ordering code.

Replacement Considerations

PCA9532PW,118 serves as a pin-compatible alternative in different packaging.