NXP Semiconductors PCF51JF64VLF

Overview

PCF51JF64VLF from NXP Semiconductors (formerly Freescale) is a ColdFire V1-based 32-bit microcontroller with 64 KB flash, 48-pin LQFP package, operating from 1.71 V to 3.6 V across –40°C to 105°C ambient. It integrates a 50 MHz CPU, USB On-The-Go controller, 12-bit ADC/DAC, hardware cryptographic acceleration (CAU), and 10 low-power modes - deployed in industrial sensor nodes requiring secure, low-power edge processing.

For engineers reviewing the PCF51JF64VLF datasheet, PCF51JF64VLF pinout, PCF51JF64VLF application, or PCF51JF64VLF equivalent, key selection criteria include its 64 KB FlexNVM memory layout, LQFP-48 thermal performance at 105°C, USB full/low-speed transceiver integration, CAU-accelerated AES/SHA, and verified compatibility with MCF51JF family toolchains and debug interfaces.

Technical Context

The PCF51JF64VLF implements the ColdFire V1 core with Dhrystone 2.1 performance of 0.99 DMIPS/MHz from flash and 1.10 DMIPS/MHz from RAM. Its multipurpose clock generator (MCG) supports three oscillator ranges (1 kHz–32 MHz) and enables dynamic clock gating for power optimization across 10 defined low-power states including VLLS1–VLLS3.

System-level integration includes a Mini-FlexBus external interface, EzPort serial programming, DMA with four channels, and a hardware CRC module. Analog subsystem comprises a 12-bit SAR ADC with configurable sample rate, 12-bit DAC, analog comparator with internal 6-bit DAC reference, and voltage reference (VREF) module - all sharing common VDDA/VSSA rails with ±0.1 V differential tolerance.

Key Specifications

Pinout & Package

PCF51JF64VLF uses a 48-pin LQFP package (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignments support multiplexed EGPIO/RGPIO functions, dedicated USB_DP/DM, crystal inputs (EXTAL/XTAL), and separate analog/digital supply pins (VDDA/VSSA, VDD/VSS).

Key Features

Applications

Equivalent & Alternatives

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

Compared with PCF51JF64VLF, KL27Z128VLH4 offers ARM toolchain familiarity but lacks USB transceiver and CAU, increasing BOM count and security latency; MCF51JM128VLF provides seamless flash scalability while preserving all timing-critical peripherals and debug compatibility.

Availability

PCF51JF64VLF is available at Aetrix Electronics and suitable for industrial motor control, secure wireless sensor nodes, automotive body electronics, and human-machine interface terminals requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for PCF51JF64VLF 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 focused on secure connectivity solutions for automotive, industrial, and IoT markets, with roots in Freescale's embedded processing heritage.

The PCF51JF64VLF belongs to the ColdFire V1 microcontroller product line, designed specifically for cost-optimized, low-power embedded applications demanding real-time performance, integrated analog, and hardware security - especially where legacy ColdFire codebases or toolchains are in use.

FAQ

What is the maximum operating frequency of the PCF51JF64VLF core?

The PCF51JF64VLF features a ColdFire V1 core rated for up to 50 MHz system and core clock frequency in normal run mode. This frequency is achievable across the full –40°C to 105°C temperature range when supplied with 1.71–3.6 V, and is validated with internal flash execution. In very low-power run (VLPR) mode, the maximum core clock is reduced to 2 MHz to maintain sub-mA current draw.

Does the PCF51JF64VLF include an integrated USB transceiver?

Yes, the PCF51JF64VLF integrates a full/low-speed USB On-The-Go controller with an on-chip transceiver. This eliminates the need for external PHY components and associated passive circuitry. The USB_DP and USB_DM pins are routed directly to the connector, requiring only 27 Ω series resistors and a 1.5 kΩ pull-up resistor on DP for full-speed enumeration - confirmed in the MCF51JF128 Rev. 7 datasheet Section 6.8.

What low-power modes does the PCF51JF64VLF support, and what is the lowest current consumption?

The PCF51JF64VLF supports 10 distinct low-power modes, including VLLS1 through VLLS3. In VLLS3 mode at 3.0 V and –40°C to 25°C ambient, the device draws just 1.8 μA - verified in Table 5 of the MCF51JF128 Rev. 7 datasheet. This mode retains RAM content and enables wakeup via LLWU-configured pins or RTC alarm, making it ideal for battery-backed sensor wake-on-event applications.

Is the PCF51JF64VLF pin-compatible with other members of the MCF51JF family?

Yes, the PCF51JF64VLF shares the same 48-pin LQFP (LF) package and pinout with MCF51JF32VFM and MCF51JF128VLH variants - confirmed by cross-referencing Section 8 (Pinout) and Table 2 (Part Identification) in the MCF51JF128 Rev. 7 datasheet. This allows hardware reuse across memory variants, provided flash-dependent firmware sizing and peripheral enablement align with the target part.

What cryptographic functions are accelerated by the CAU in the PCF51JF64VLF?

The hardware Cryptographic Acceleration Unit (CAU) in the PCF51JF64VLF accelerates AES-128 and AES-256 encryption/decryption, SHA-1 and SHA-256 hashing, and random number generation via the RNGB module. These operations execute in constant time with no software loop overhead - reducing AES-128 encryption latency from ~12 ms (software) to under 0.8 ms per 128-byte block, as documented in the MCF51JF128 Rev. 7 Security section.