DF36079LFZV Equivalent & Substitute Parts

Part Overview

The DF36079LFZV is a 16-bit H8/300H Tiny microcontroller manufactured by Renesas Electronics Corporation, featuring 128KB FLASH memory and a 64-LFQFP package. This device is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. The part operates at 16MHz with a 3V to 3.6V supply range and includes integrated peripherals such as I2C, SCI connectivity, PWM, watchdog timer, and low-voltage detection.

Substiute Parts

DF36079LFZV

Renesas Electronics CorporationIn Stock: 1091DF36079LFZV Datasheet

Current PartRFQ

MCF51QE128CLH

NXP USA Inc.In Stock: 2409MCF51QE128CLH Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the DF36079LFZV is determined by the following critical parameters:

Package Compatibility: Both the main part and substitute must use the 64-LQFP (10x10) surface mount package to ensure mechanical and electrical compatibility with existing PCB layouts.

Memory Configuration: The 128KB FLASH program memory is a core functional requirement. Substitute parts must provide equal or greater FLASH capacity to maintain firmware compatibility.

Supply Voltage Range: The DF36079LFZV operates within 3V to 3.6V. Substitute parts must support this voltage range or a compatible overlapping range to function within the same power distribution system.

Connectivity and Peripherals: The presence of I2C and SCI interfaces, along with PWM, watchdog timer, and low-voltage detection, defines the minimum peripheral set required for functional equivalence.

Compliance and Certifications: RoHS3 compliance and MSL rating of 3 establish the environmental and handling standards that substitute parts must meet.

The MCF51QE128CLH meets these substitution criteria through identical package geometry, matching FLASH memory capacity, compatible supply voltage range, and equivalent peripheral feature set.

Parameter Comparison

Engineering Selection Recommendations

The MCF51QE128CLH is a direct substitute for the DF36079LFZV based on matching package geometry, identical FLASH memory capacity, overlapping supply voltage range, and equivalent peripheral feature set. Both devices maintain ROHS3 compliance and identical MSL ratings, ensuring compatibility with current manufacturing and handling standards.

The MCF51QE128CLH offers enhanced specifications including 32-bit architecture, higher clock speed (50MHz versus 16MHz), increased RAM (8K versus 6K), additional I/O pins (54 versus 47), and extended operating temperature range (-40°C to 85°C versus -20°C to 75°C). The substitute part includes SPI connectivity in addition to I2C and SCI, and provides higher-resolution analog-to-digital conversion (20x12b versus 8x10b).

The active product status of the MCF51QE128CLH ensures ongoing availability and manufacturer support, addressing the obsolescence of the DF36079LFZV.

Frequently Asked Questions (FAQ)

Q: Can the MCF51QE128CLH be used as a direct replacement for the DF36079LFZV in existing designs?

A: The MCF51QE128CLH is mechanically and electrically compatible due to identical 64-LQFP package geometry and matching FLASH memory capacity. However, firmware adaptation is required due to architectural differences between the H8/300H 16-bit processor and the Coldfire V1 32-bit processor. Peripheral register maps and instruction sets differ between manufacturers.

Q: What are the key compatibility factors for substitution?

A: Package type (64-LQFP 10x10), FLASH memory size (128KB), supply voltage overlap (3V to 3.6V), and presence of core peripherals (I2C, SCI, PWM, WDT, LVD) determine substitution viability. Both devices meet these criteria.

Q: Does the MCF51QE128CLH support the same voltage supply range?

A: The MCF51QE128CLH supports 1.8V to 3.6V, which encompasses the DF36079LFZV range of 3V to 3.6V. The substitute part operates at lower minimum voltage, providing additional design flexibility.

Q: Are there differences in peripheral functionality?

A: Both devices include I2C, SCI, PWM, and watchdog timer. The MCF51QE128CLH adds SPI connectivity. The DF36079LFZV includes power-on reset (POR) as a discrete peripheral; the MCF51QE128CLH integrates this function within the low-voltage detection module.

Q: What is the impact of the higher clock speed in the MCF51QE128CLH?

A: The MCF51QE128CLH operates at 50MHz compared to 16MHz in the DF36079LFZV. This provides increased processing capability but requires firmware validation to ensure timing-critical operations remain compatible. Power consumption may increase proportionally to clock frequency.

Q: Are both devices compliant with current environmental standards?

A: Both the DF36079LFZV and MCF51QE128CLH are ROHS3 compliant and carry MSL rating 3 (168 hours), meeting current manufacturing and handling requirements.