DF36079GHV Equivalent & Substitute Parts

Part Overview

The DF36079GHV is a 16-bit H8/300H Tiny Microcontroller manufactured by Renesas Electronics Corporation, featuring 128KB FLASH memory, 6KB RAM, and 47 I/O pins in a 64-QFP package. This device operates at 20MHz with a supply voltage range of 4.5V to 5.5V and includes integrated peripherals such as I2C, SCI, PWM, WDT, LVD, and POR functionality. The DF36079GHV is classified as obsolete, making equivalent substitute components necessary for new designs, legacy system maintenance, and production continuity.

Substiute Parts

DF36079GHV

Renesas Electronics CorporationIn Stock: 1153DF36079GHV Datasheet

Current PartRFQ

MCF51AG128CQH

Freescale SemiconductorIn Stock: 5501MCF51AG128CQH Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the DF36079GHV is determined by the following critical parameters:

Package Compatibility: Both the main part and substitute must use the 64-QFP (14x14) 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.

I/O Pin Count: The 47 I/O pins define the peripheral connectivity capability. Substitute parts must provide sufficient I/O to support the same or greater number of external connections.

Voltage Supply Range: The 4.5V ~ 5.5V supply voltage range establishes the power domain. Substitute parts must operate within or encompass this voltage range.

Connectivity Interfaces: I2C and SCI interfaces are specified peripherals. Substitute parts must support these communication protocols.

Compliance & Certifications: RoHS3 compliance and MSL rating ensure environmental and handling standards are maintained across substitutions.

The MCF51AG128CQH meets these substitution criteria through equivalent package geometry, matching FLASH capacity, expanded I/O capability, and broader voltage tolerance, while maintaining required connectivity interfaces and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The MCF51AG128CQH is an active product from Freescale Semiconductor, providing long-term availability and supply chain stability compared to the obsolete DF36079GHV. Both devices share identical 64-QFP package geometry and 128KB FLASH memory capacity, ensuring direct PCB compatibility and firmware storage equivalence.

The MCF51AG128CQH offers enhanced specifications including 32-bit processing architecture, increased clock speed (50MHz vs. 20MHz), expanded RAM (16K vs. 6K), additional I/O pins (53 vs. 47), and broader operating temperature range (-40°C to 85°C vs. -20°C to 75°C). The extended voltage supply range (2.7V to 5.5V) encompasses the DF36079GHV operating window, ensuring power domain compatibility.

Selection of the MCF51AG128CQH is supported by its active product status, which guarantees continued manufacturing, technical support, and component availability. The device maintains required connectivity interfaces (I2C, SCI) and adds SPI capability. RoHS3 compliance status for the MCF51AG128CQH should be verified with the manufacturer for applications requiring environmental certification.

Frequently Asked Questions (FAQ)

Q: Can the MCF51AG128CQH directly replace the DF36079GHV on existing PCBs?

A: Yes. Both devices use identical 64-QFP (14x14) surface mount packages with matching pin counts and layouts. No PCB redesign is required for mechanical and electrical pin compatibility.

Q: Are firmware modifications necessary when substituting to the MCF51AG128CQH?

A: Firmware compatibility depends on application-specific code. Both devices provide 128KB FLASH memory and support I2C and SCI interfaces. However, the MCF51AG128CQH uses a different processor architecture (32-bit Coldfire V1 vs. 16-bit H8/300H), requiring code recompilation and potential instruction set adaptation. Existing firmware binaries are not directly portable.

Q: What is the voltage supply compatibility between these devices?

A: The DF36079GHV operates at 4.5V ~ 5.5V. The MCF51AG128CQH operates at 2.7V ~ 5.5V, providing broader voltage tolerance. Existing power supply designs for the DF36079GHV will operate the MCF51AG128CQH within specification.

Q: Does the MCF51AG128CQH provide equivalent peripheral functionality?

A: The MCF51AG128CQH includes all peripherals specified for the DF36079GHV (LVD, PWM, WDT) plus additional features (DMA). The SPI interface is added. Both devices support I2C and SCI connectivity. Peripheral register mapping and control sequences differ due to processor architecture differences.

Q: What is the operating temperature range difference?

A: The DF36079GHV operates from -20°C to 75°C. The MCF51AG128CQH operates from -40°C to 85°C, providing extended temperature capability suitable for industrial and automotive applications.

Q: Is the MCF51AG128CQH RoHS3 compliant?

A: RoHS3 compliance status for the MCF51AG128CQH is not specified in the provided data. Verification with Freescale Semiconductor documentation is required for applications with environmental certification requirements.