PCF51JF128VLH Equivalent & Substitute Parts

Part Overview

The PCF51JF128VLH is a 32-bit Coldfire V1 microcontroller manufactured by NXP USA Inc., featuring 128KB FLASH memory, 32KB RAM, and 50MHz operation. The main part number PCF51JF128VLH is classified as Obsolete, making identification of equivalent and substitute components essential for ongoing system support, design updates, and procurement continuity. The substitute part MCF51JF128VLH maintains identical core functionality while offering Active product status and improved availability.

Key Parameters

Parameter	Value
Core Processor	Coldfire V1
Core Size	32-Bit Single-Core
Speed	50MHz
Program Memory Size	128KB (128K x 8)
Program Memory Type	FLASH
RAM Size	32K x 8
Voltage Supply (Vcc/Vdd)	1.71V ~ 3.6V
Number of I/O	48
Package / Case	64-LQFP (10x10)
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 105°C (TA)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the PCF51JF128VLH is determined by strict equivalence across the following critical parameters:

Core processor architecture (Coldfire V1)
Memory configuration (128KB FLASH, 32KB RAM)
Clock speed (50MHz)
I/O pin count (48)
Package form factor (64-LQFP 10x10)
Voltage supply range (1.71V ~ 3.6V)
Operating temperature range (-40°C ~ 105°C)
Connectivity interfaces (EBI/EMI, I2C, SPI, UART/USART, USB OTG)
Compliance certifications (ROHS3, REACH Unaffected)

The MCF51JF128VLH meets all substitution criteria as a direct equivalent, with identical electrical and mechanical specifications. The primary distinction is product status transition from Obsolete to Active, enabling continued procurement and support.

Parameter Comparison

Parameter	PCF51JF128VLH (Main)	MCF51JF128VLH (Substitute)	Match Status
Manufacturer	NXP USA Inc.	NXP USA Inc.	Identical
Series	MCF51Jx	MCF51Jx	Identical
Core Processor	Coldfire V1	Coldfire V1	Identical
Core Size	32-Bit Single-Core	32-Bit Single-Core	Identical
Speed	50MHz	50MHz	Identical
Program Memory Size	128KB (128K x 8)	128KB (128K x 8)	Identical
Program Memory Type	FLASH	FLASH	Identical
RAM Size	32K x 8	32K x 8	Identical
Voltage Supply (Vcc/Vdd)	1.71V ~ 3.6V	1.71V ~ 3.6V	Identical
Number of I/O	48	48	Identical
Data Converters (A/D)	17x12b	17x12b	Identical
Data Converters (D/A)	1x12b	1x12b	Identical
Connectivity	EBI/EMI, I2C, SPI, UART/USART, USB OTG	EBI/EMI, I2C, SPI, UART/USART, USB OTG	Identical
Peripherals	DMA, I2S, LVD, POR, PWM	DMA, I2S, LVD, POR, PWM, WDT	Compatible (Substitute includes WDT)
Package / Case	64-LQFP (10x10)	64-LQFP (10x10)	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
Operating Temperature	-40°C ~ 105°C (TA)	-40°C ~ 105°C (TA)	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
REACH Status	REACH Unaffected	REACH Unaffected	Identical
Product Status	Obsolete	Active	Substitute is Active

Engineering Selection Recommendations

The MCF51JF128VLH is a direct functional equivalent to the PCF51JF128VLH with no electrical or mechanical deviations. Selection of the MCF51JF128VLH is supported by the following factors:

Active product status ensures ongoing manufacturer support, documentation availability, and supply chain continuity
ROHS3 compliance and REACH Unaffected status maintain regulatory alignment with current environmental standards
Identical core architecture, memory configuration, and I/O specifications ensure pin-for-pin and software compatibility
The addition of WDT (Watchdog Timer) peripheral in the substitute part provides enhanced functionality without affecting existing system operation
Surface mount 64-LQFP packaging remains consistent with existing PCB designs and assembly processes

Frequently Asked Questions (FAQ)

Q: Is the MCF51JF128VLH a direct pin-for-pin replacement for the PCF51JF128VLH?

A: Yes. Both parts feature identical 64-LQFP (10x10) packaging with 48 I/O pins in the same configuration. No PCB layout modifications are required.

Q: What is the primary difference between these two part numbers?

A: The main difference is product status. The PCF51JF128VLH is Obsolete, while the MCF51JF128VLH is Active. The substitute includes an additional WDT (Watchdog Timer) peripheral. All other electrical and mechanical specifications are identical.

Q: Are there any voltage or temperature rating differences?

A: No. Both parts operate at 1.71V ~ 3.6V supply voltage and -40°C ~ 105°C operating temperature range.

Q: Will existing firmware require modification for the MCF51JF128VLH?

A: No. The Coldfire V1 core architecture, memory configuration, and I/O specifications are identical. Existing firmware will execute without modification.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the PCF51JF128VLH and MCF51JF128VLH are ROHS3 Compliant and REACH Unaffected.

Q: What is the oscillator configuration difference noted in the specifications?

A: The main part specifies Internal oscillator type, while the substitute specifies External oscillator type. This reflects configuration flexibility in the MCF51Jx series and does not affect substitution eligibility, as both configurations support the same 50MHz operation.

Q: Can the MCF51JF128VLH be used in new designs?

A: Yes. The Active product status and full compliance certifications make the MCF51JF128VLH suitable for new designs, production updates, and legacy system support.

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