NXP Semiconductors PCA9632DP2,118

Overview

PCA9632DP2,118 from NXP Semiconductors is a 4-bit Fast-mode Plus (Fm+) I²C-bus LED driver optimized for RGBA color mixing, featuring individual 8-bit PWM (1.5625 kHz) and group dimming/blinking control, 25 mA sink per channel, and TSSOP10 package with hardware address pins A0/A1. It operates from 2.3 V to 5.5 V and supports 5.5 V-tolerant inputs.

For engineers reviewing the PCA9632DP2,118 datasheet, PCA9632DP2,118 pinout, PCA9632DP2,118 application, or PCA9632DP2,118 equivalent, this device delivers precise LED brightness control in space-constrained RGB status indicators, keypad backlights, and low-power display interfaces requiring stable I²C timing, multi-device bus coordination, and sub-1 μA standby current.

Technical Context

The PCA9632DP2,118 implements dual PWM architectures: an 8-bit individual controller (1.5625 kHz, 0–99.6% duty cycle) and a 6-bit group controller (6.25 kHz, 0–98.4%) for per-channel dimming, plus a 4-bit group PWM (190 Hz, 0–93.75%) for global dimming or 8-bit group blinking (24 Hz to 0.09 Hz). Its Fm+ interface supports 1 MHz clocking and 30 mA SDA drive strength for high-capacitance buses.

Hardware address selection via A0/A1 pins enables up to four PCA9632DP2,118 devices on one bus; software-configurable LEDOUT register modes (off/on/individual/group) and SWRST Call provide flexible output state management and system-level reset without hardware intervention.

Key Specifications

Pinout & Package

TSSOP10 package (SOT552-1), 3 mm body width, 0.5 mm pitch, exposed pad not present - suitable for automated assembly and compact PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LED driver applications.

Compared with TLC59116IPWPR and PCA9633DP,118, the PCA9632DP2,118 uniquely combines ultra-low standby current (<1 μA), 1 MHz Fm+ bus support, hardware addressability, and dual-mode (dimming + blinking) group control - making it optimal for compact, power-aware RGB interfaces where timing precision and multi-device coordination are essential.

Availability

PCA9632DP2,118 is available at Aetrix Electronics and suitable for RGB status indicators, keypad backlights, and LCD backlight control requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for PCA9632DP2,118 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The PCA9632 product line was designed specifically for low-power, I²C-controlled LED color mixing and status indication - emphasizing energy efficiency, bus scalability, and seamless integration into resource-constrained microcontroller systems.

FAQ

What is the maximum I²C bus capacitance supported by PCA9632DP2,118?

The PCA9632DP2,118 supports up to 4000 pF bus capacitance due to its 30 mA high-drive SDA output and Fast-mode Plus (Fm+) compliance. This allows reliable operation with longer traces, more connectors, or multiple devices on a single bus without external buffers - a key advantage over standard 400 kHz I²C drivers. The PCA9632DP2,118 maintains signal integrity even under heavy capacitive loading.

How does PCA9632DP2,118 achieve <1 μA standby current?

The PCA9632DP2,118 achieves sub-microamp standby current by disabling its internal 400 kHz oscillator and entering Sleep mode via the SLEEP bit in MODE1 register. In this state, all PWM generators halt, outputs go high-impedance, and only essential bias circuits remain active. The PCA9632DP2,118 resumes full operation within 500 μs after clearing the SLEEP bit - ideal for intermittent LED activation in battery-powered devices.

Can PCA9632DP2,118 drive LEDs directly without external components?

Yes, the PCA9632DP2,118 can drive standard LEDs directly: in totem-pole mode it sources 10 mA and sinks 25 mA per channel at 5 V; in open-drain mode it sinks 25 mA. Its 5.5 V-tolerant outputs accommodate common anode configurations and eliminate the need for external MOSFETs or current-limiting resistors in many cases - simplifying layout and reducing BOM cost. The PCA9632DP2,118 supports direct connection for LEDs rated ≤25 mA and ≤5.5 V forward voltage.

What is the function of A0 and A1 pins on PCA9632DP2,118?

A0 and A1 are hardware I²C address select pins on the PCA9632DP2,118 that configure the device's 7-bit target address. With four possible combinations (00, 01, 10, 11), they enable up to four PCA9632DP2,118 devices to share one I²C bus without address conflict. These pins must be pulled HIGH or LOW externally - no internal pull-ups exist. The PCA9632DP2,118 reads their state at power-up to set its base address before any I²C communication begins.

Does PCA9632DP2,118 support synchronized LED updates across multiple devices?

Yes, the PCA9632DP2,118 supports synchronized LED state changes using the "Change on STOP" output update mode (default setting in MODE2 register). When enabled, all LED outputs update simultaneously upon receipt of the I²C STOP condition - ensuring atomic brightness or blink transitions across multiple PCA9632DP2,118 devices on the same bus. This eliminates visible stepping or phase misalignment in coordinated lighting effects like marquee chasing or uniform dimming.