NXP Semiconductors MC40XS6500DEKR2

Overview

MC40XS6500DEKR2 from NXP Semiconductors is a penta-channel 40 mΩ automotive high-side switch IC for LED and incandescent lamp control in centralized lighting ECUs. It delivers 5 protected high-side outputs, 5.0 MHz daisy-chainable SPI interface, programmable current sensing (1:100–1:1000), dynamic overcurrent threshold profiling, and -16 V reverse polarity protection. Used in exterior lighting modules requiring fail-safe diagnostics and limp-home operation.

For engineers reviewing the MC40XS6500DEKR2 datasheet, MC40XS6500DEKR2 pinout, MC40XS6500DEKR2 application, or MC40XS6500DEKR2 equivalent, key selection criteria include R_DS(on) per channel (40 mΩ), operating voltage range (7.0–18 V full spec), sleep current (< 5.0 µA), SOIC-32EP package compatibility, and SPI-configurable PWM duty cycle and open-load detection.

Technical Context

The MC40XS6500DEKR2 integrates five self-protected high-side power switches with active clamp circuitry for inductive load switching, thermal shutdown with prewarning, and programmable output edge shaping to reduce EMI. Its dual-supply architecture uses VBAT (7–18 V) for power stages and VCC (4.5–5.5 V) for SPI logic and register access.

It implements a 16-bit SPI 5.0 MHz interface supporting daisy-chaining, configurable fault reporting (openload, short-to-battery, severe short-to-ground, overtemperature), and synchronized analog feedback via CSNS/SYNCB pins. Fail mode activation occurs on LIMP assertion or SPI communication loss, enabling direct IN1–IN4 control of OUT1–OUT4 while disabling OUT5/OUT6.

Key Specifications

Pinout & Package

MC40XS6500DEKR2 is housed in a 32-pin SOIC with exposed pad (SOICEP), optimized for thermal dissipation in automotive lighting modules. The exposed VBAT pad serves as primary power input and thermal path to PCB ground plane.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side switch applications.

Compared with MC40XS6500BEK and MC40XS6500CEK, the MC40XS6500DEKR2 offers identical core functionality but ships in tape-and-reel format optimized for automated placement, reducing line changeover time and minimizing static-sensitive handling in high-mix production environments.

Availability

MC40XS6500DEKR2 is available at Aetrix Electronics and suitable for automotive exterior lighting, LED headlamp control, and centralized lamp diagnostics requiring stable component supply, long-term lifecycle support, and AEC-Q100 qualified sourcing.

Supply support for MC40XS6500DEKR2 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 leader specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in automotive power management and functional safety.

The MC40XS6500DEKR2 belongs to NXP's 12XS6 SMARTMOS family-designed specifically for centralized automotive lighting ECUs requiring robust diagnostics, fail-safe operation, and software-compatible scalability across output count and R_DS(on) variants.

FAQ

What is the maximum continuous output current per channel for MC40XS6500DEKR2?

The MC40XS6500DEKR2 supports 3.9 A continuous output current per channel (OUT1–OUT5) under thermal limits defined by R_θJA = 22 °C/W on a four-layer board. This rating assumes junction temperature remains ≤150 °C and VBAT is within 7.0–18 V. Derating is required above ambient temperatures of 85 °C or with reduced copper area.

Does MC40XS6500DEKR2 require both VBAT and VCC to operate?

Yes, MC40XS6500DEKR2 requires both supplies: VBAT (7.0–18 V) powers the high-side drivers and internal regulator, while VCC (4.5–5.5 V) is mandatory for SPI communication, logic operation, and OUT6 control. Without VCC, the device enters sleep mode and SPI registers become inaccessible-even if VBAT is present.

How does the dynamic overcurrent threshold work in MC40XS6500DEKR2?

The MC40XS6500DEKR2 implements a time-varying overcurrent threshold that starts high during initial turn-on to tolerate inrush current (e.g., cold LED strings or incandescent filaments), then decays to a lower steady-state level for precise fault detection. This profile is SPI-programmable per channel and prevents false trips while maintaining tight current monitoring accuracy.

Can MC40XS6500DEKR2 drive loads above 18 V, such as during load dump?

MC40XS6500DEKR2 tolerates up to 40 V on VBAT for short durations (e.g., load dump per ISO 7637-2 Pulse 5a), but full specification compliance-including R_DS(on), timing, and diagnostic accuracy-is guaranteed only between 7.0 V and 18 V. Operation at 28 V (jump start) is supported in extended mode, though some features like PWM may be limited.

Is MC40XS6500DEKR2 pin-compatible with other 12XS6 family members?

Yes, MC40XS6500DEKR2 shares identical SOIC-32EP footprint and pinout with MC40XS6500BEK and MC40XS6500CEK, including matching VBAT pad layout and SPI signal placement. This enables drop-in replacement across variants without PCB redesign, provided firmware supports the same register map and feature set.