NXP Semiconductors OM6282,598

Overview

OM6282,598 from NXP Semiconductors is a 4-bit I²C-bus LED driver optimized for RGBA color mixing, featuring four independent 8-bit PWM channels (97 kHz, 0–99.6% duty cycle), one group PWM controller (190 Hz fixed or 24 Hz–10.73 s programmable), 2.3–5.5 V supply range, and 5.5 V-tolerant outputs. It supports totem-pole (25 mA sink / 10 mA source) or open-drain (25 mA sink) output configuration and targets LED status indicators and keypad backlights in handheld devices.

For engineers reviewing the OM6282,598 datasheet, OM6282,598 pinout, OM6282,598 application, or OM6282,598 equivalent, key selection criteria include I²C Fast-mode Plus (1 MHz) compatibility, hardware address pin count (0 for this variant), OE pin absence, and TSSOP8 package constraints for space-constrained portable designs.

Technical Context

The OM6282,598 implements a dual-layer PWM architecture: per-channel 97 kHz individual brightness control with 256-step linear resolution, and a shared group PWM operating at 190 Hz (dimming) or programmable 24 Hz–10.73 s (blinking). Its I²C interface complies with Fast-mode Plus (Fm+), supporting up to 1 MHz clock rate and 30 mA SDA drive strength for high-capacitance buses.

No Output Enable (OE) pin is present; output state is fully software-controlled via the LEDOUT register (LDRx bits) and MODE2's OUTDRV bit. The device uses an internal 25 MHz oscillator-no external timing components required-and includes noise filtering on SDA/SCL inputs plus edge-rate control on outputs to reduce EMI.

Key Specifications

Pinout & Package

OM6282,598 is supplied in an 8-pin TSSOP package (SOT505-1), 3 mm body width, with exposed pad not electrically connected. Pin functions are fixed: LED0–LED3 (outputs), VDD/VSS (power), SDA/SCL (I²C interface). No address pins or OE pin present - matches the 8-pin variant described in Table 1 as PCA9633DP1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC59116IPWPR and IS31FL3728-QFLS4-TR, OM6282,598 delivers purpose-optimized 4-channel RGBA control in the smallest footprint and lowest gate count, with unique group PWM synchronization ideal for status and backlighting where coordinated visual effects matter more than raw channel count.

Availability

OM6282,598 is available at Aetrix Electronics and suitable for RGB status indicators, keypad backlights, and LED display segments requiring stable component supply across consumer electronics, industrial handhelds, and medical instrumentation programs.

Supply support for OM6282,598 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 consumer applications.

OM6282,598 belongs to NXP's PCA96xx family of I²C LED drivers, engineered specifically for low-pin-count, low-power, and space-constrained embedded lighting control - emphasizing ease of integration, bus efficiency, and visual consistency.

FAQ

What is the I²C address configuration for OM6282,598?

OM6282,598 is the 8-pin variant (PCA9633DP1) with a fixed I²C slave address of 0xC0 (1100000b, R/W=0). It has no hardware address pins, so address collision is avoided in single-device configurations. The LED All Call address (0xE0) and Software Reset address (0x06) remain available for broadcast commands and remote initialization, respectively. This simplifies firmware development in systems with only one OM6282,598.

Does OM6282,598 support external PWM dimming via the OE pin?

No, OM6282,598 does not include an Output Enable (OE) pin. That feature is exclusive to the 16-pin versions (e.g., PCA9633D16, PCA9633PW). In OM6282,598, LED output enable/disable is controlled entirely through software via the LEDOUT register (LDRx bits), and global dimming/blinking is managed by the GRPPWM and GRPFREQ registers. Hardware-based synchronous dimming across multiple devices is not supported in this variant.

Can OM6282,598 drive LEDs directly without external current-limiting resistors?

OM6282,598 provides constant-current sink capability (25 mA per channel at 5 V) but does not regulate current internally - it operates as a controlled switch. External current-limiting resistors are required to set LED forward current. The 5.5 V-tolerant outputs allow direct connection to LEDs with Vf up to 5.5 V, but resistor values must be selected based on supply voltage, LED Vf, and desired current (e.g., 100 Ω for ~20 mA at 3.3 V with 2.0 V Vf).

What is the minimum supply voltage for OM6282,598 to operate correctly?

OM6282,598 operates down to 2.3 V, enabling compatibility with single-cell Li-ion (2.7–4.2 V) and Li-polymer batteries, as well as 2.5 V logic domains. At 2.3 V, the internal 25 MHz oscillator remains functional, and all PWM generators retain full 256-step resolution. However, output drive strength decreases proportionally - maximum sink current drops to ~18 mA at 2.3 V, which must be accounted for in LED brightness budgeting.

How does OM6282,598 handle power-up behavior and register initialization?

OM6282,598 performs an internal power-on reset (POR) that initializes all registers to default values: MODE1 = 0x00 (sleep disabled, All Call enabled), MODE2 = 0x04 (totem-pole outputs, outputs change on STOP), PWMx = 0x00 (LEDs off), GRPPWM = 0xFF (full brightness), LEDOUT = 0x00 (all LEDs off). No external reset is needed. The Software Reset (SWRST) command (I²C address 0x06) replicates this POR state, allowing full register recovery via software without cycling VDD.