HD64F3694FPV Equivalent & Substitute Parts

Part Overview

The HD64F3694FPV is a 16-bit H8/300H Tiny microcontroller manufactured by Renesas Electronics Corporation, featuring 32KB FLASH memory and a 64-LQFP package. This device is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design requirements and production continuity. The part operates at 20MHz with integrated peripherals including I2C, SCI, PWM, and watchdog timer functionality, making it suitable for embedded control applications requiring moderate processing capability and memory capacity.

Substiute Parts

HD64F3694FPV

Renesas Electronics CorporationIn Stock: 1993HD64F3694FPV Datasheet

Current PartRFQ

MC9S08MM32AVLH

Freescale SemiconductorIn Stock: 2331MC9S08MM32AVLH Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HD64F3694FPV 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 PCB layout compatibility without redesign.

Memory Configuration: The 32KB FLASH program memory and 2K x 8 RAM are baseline requirements for functional equivalence in applications designed for the HD64F3694FPV.

Voltage Supply Range: The substitute must operate within or encompass the 3V ~ 5.5V supply range to ensure compatibility with existing power distribution designs.

I/O Count and Connectivity: A minimum of 29 I/O pins with I2C and SCI connectivity are required to maintain interface compatibility with peripheral devices and communication protocols.

Peripheral Integration: PWM and watchdog timer (WDT) functionality must be present to support timing-critical and safety-related application requirements.

The MC9S08MM32AVLH qualifies as a substitute based on matching package geometry, memory capacity, I/O count, and core peripheral set, despite differences in core architecture, processing speed, and voltage supply range.

Parameter Comparison

Engineering Selection Recommendations

The MC9S08MM32AVLH is available as an active product from Freescale Semiconductor, providing production continuity for applications currently using the obsolete HD64F3694FPV. Both devices share identical package geometry (64-LQFP 10x10), program memory capacity (32KB FLASH), and RAM configuration (2K x 8), enabling direct socket compatibility without PCB modifications.

The substitute device provides enhanced capabilities including higher processing speed (48MHz versus 20MHz), expanded I/O count (33 versus 29 pins), additional connectivity options (SPI in addition to I2C and SCI), and extended operating temperature range (-40°C to 105°C versus -20°C to 75°C). These enhancements support broader application requirements without functional degradation.

Voltage supply range differs between the devices: the HD64F3694FPV operates at 3V ~ 5.5V while the MC9S08MM32AVLH operates at 1.8V ~ 3.6V. Applications requiring 5V operation must implement appropriate voltage regulation or level shifting to accommodate the substitute device's lower maximum supply voltage.

The MC9S08MM32AVLH includes low voltage detection (LVD) and power-on reset (POR) functionality not present in the original device, providing enhanced system reliability. Firmware migration from the H8/300H architecture to the S08 architecture is required, as these represent distinct processor families with different instruction sets and peripheral register mappings.

Frequently Asked Questions (FAQ)

Q: Can the MC9S08MM32AVLH be used as a direct replacement without PCB modifications?

A: Yes, regarding physical placement. Both devices use the 64-LQFP (10x10) package with identical pin count and footprint. However, firmware recompilation for the S08 architecture is mandatory, and voltage supply circuitry may require modification if the application requires 5V operation.

Q: What are the critical differences between these microcontrollers?

A: The primary differences are core architecture (16-bit H8/300H versus 8-bit S08), processing speed (20MHz versus 48MHz), voltage supply range (3V-5.5V versus 1.8V-3.6V), and instruction set. The MC9S08MM32AVLH provides additional I/O pins (33 versus 29), SPI connectivity, and enhanced analog capabilities (16-bit A/D and 12-bit D/A converters).

Q: Is the voltage supply range difference a compatibility issue?

A: The MC9S08MM32AVLH maximum supply voltage of 3.6V is lower than the HD64F3694FPV maximum of 5.5V. Applications designed for 5V operation require voltage regulation to 3.6V or below. The substitute device's minimum supply voltage of 1.8V is lower, supporting low-power applications.

Q: Are there memory capacity differences?

A: No. Both devices provide 32KB FLASH program memory and 2K x 8 RAM, ensuring equivalent memory resources for application code and data storage.

Q: What is the impact of the different core architectures?

A: The H8/300H and S08 are distinct processor families with different instruction sets, register organizations, and peripheral interfaces. Existing firmware must be recompiled or rewritten for the S08 architecture. Development tools, compiler support, and debugging capabilities differ between the two platforms.

Q: Does the substitute provide additional I/O capability?

A: Yes. The MC9S08MM32AVLH provides 33 I/O pins compared to 29 on the HD64F3694FPV, offering four additional general-purpose I/O lines for expanded peripheral connectivity.

Q: What compliance certifications apply to these devices?

A: The HD64F3694FPV is ROHS3 compliant. RoHS compliance status for the MC9S08MM32AVLH is not specified in the provided data and should be verified with the manufacturer for applications requiring regulatory compliance documentation.