PCA9553D/02,118

Overview

The PCA9553D/02,118 is a linear LED driver IC manufactured by NXP USA Inc., designed for I²C-bus and SMBus applications. It features four open-drain outputs capable of sinking up to 25 mA per channel with a total package limit of 100 mA. The device operates on a supply voltage range of 2.3 V to 5.5 V and supports clock frequencies up to 400 kHz. It includes an internal oscillator providing two programmable blink rates (frequency and duty cycle) to reduce bus traffic. The component is housed in an 8-TSSOP surface-mount package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Internal oscillator enables programmable blinking without external components or continuous controller intervention
• I²C interface logic compatible with SMBus standards for flexible system integration
• Unused output bits function as general-purpose parallel input/output expansion

Applications

• LED blinker applications requiring reduced I²C bus traffic
• Systems needing to free up microcontroller timers
• General-purpose parallel input/output expansion alongside LED control

Procurement Notes

Verify the specific suffix /02 against official documentation to confirm the fixed I²C address configuration, as this variant differs from the /01 version. Confirm availability status directly with NXP or authorized distributors, as lead times may vary. Ensure the 8-TSSOP package dimensions align with your PCB footprint requirements before finalizing procurement.

Selection Notes

Select this component when application constraints require reducing I²C bus load by offloading blinking tasks to hardware. It is suitable for designs needing both LED driving and GPIO expansion in a compact 8-pin package. Verify that the required blink rates fall within the internal oscillator capabilities and that the 25 mA sink current meets the LED specifications.

Part Context

This part belongs to the PCA9553 family of LED blinkers developed by NXP Semiconductors. The series is engineered to minimize I²C communication overhead by utilizing internal oscillators for LED flashing patterns. Variants such as the /01 and /02 offer distinct fixed addresses, allowing multiple devices to operate on the same bus without address conflicts.

Replacement Considerations

PCA9553DP/01,118 is listed as a parameter-equivalent substitute by Rochester Electronics, LLC.