M37545G4GP#U0 Equivalent & Substitute Parts

Part Overview

The M37545G4GP#U0 is an 8-bit microcontroller manufactured by Renesas, featuring a 740 core processor operating at 4MHz with 16KB QzROM program memory and 512 x 8 bytes of RAM. This device is packaged in a 32-LQFP (7x7) surface mount configuration and operates across a supply voltage range of 1.8V to 3.6V with an operating temperature range of -20°C to 85°C.

The M37545G4GP#U0 has reached obsolete product status. Identifying equivalent and substitute parts is necessary to support legacy system maintenance, design updates, and procurement continuity where original components are no longer available through standard distribution channels.

Substiute Parts

M37545G4GP#U0

RenesasIn Stock: 3144M37545G4GP#U0 Datasheet

Current PartRFQ

R5F11BBCAFP#50

Renesas Electronics CorporationIn Stock: 775R5F11BBCAFP#50 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the M37545G4GP#U0 is based on the following critical parameters that determine functional and physical compatibility:

Package Compatibility: Both the main part and substitute part utilize the 32-LQFP (7x7) surface mount package, ensuring identical PCB footprint and mounting requirements.

Processor Architecture: While the M37545G4GP#U0 employs an 8-bit 740 core and the substitute R5F11BBCAFP#50 uses a 16-bit RL78 core, both are Renesas microcontroller architectures designed for embedded applications.

Supply Voltage Range: The main part operates at 1.8V to 3.6V, while the substitute operates at 1.6V to 5.5V. The substitute's wider voltage range encompasses the original specification, providing compatibility in this parameter.

Operating Temperature Range: The main part operates from -20°C to 85°C, while the substitute operates from -40°C to 85°C. The substitute's extended lower temperature range covers the original specification.

Peripheral Feature Set: Both devices include LVD (Low Voltage Detect), POR (Power-On Reset), and WDT (Watchdog Timer) peripherals, providing core system management functions.

Product Status and Compliance: The main part is obsolete and RoHS non-compliant. The substitute is an active product with ROHS3 compliance, supporting modern regulatory requirements.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The M37545G4GP#U0 is classified as obsolete, indicating end-of-life status and limited availability through standard distribution. The R5F11BBCAFP#50 maintains active product status with ongoing manufacturer support and availability.

Regulatory Compliance: The M37545G4GP#U0 is RoHS non-compliant, reflecting its legacy design status. The R5F11BBCAFP#50 is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for new designs and manufacturing environments subject to environmental compliance mandates.

Physical Compatibility: Both devices share identical 32-LQFP (7x7) surface mount packaging, enabling direct PCB footprint compatibility without layout modifications.

Electrical Parameter Coverage: The R5F11BBCAFP#50 supply voltage range (1.6V to 5.5V) encompasses the M37545G4GP#U0 specification (1.8V to 3.6V). The operating temperature range of the substitute (-40°C to 85°C) extends below the original specification (-20°C to 85°C), providing broader environmental coverage.

Memory and Performance Characteristics: The substitute provides increased program memory (32KB versus 16KB), additional RAM (5.5K x 8 versus 512 x 8), integrated EEPROM (4K x 8), and significantly higher operating speed (32MHz versus 4MHz). These enhancements support more complex firmware implementations and faster processing requirements.

Architectural Differences: Substitution requires firmware adaptation due to the transition from 8-bit 740 architecture to 16-bit RL78 architecture. Software compatibility is not guaranteed and requires engineering evaluation of the target application.

Frequently Asked Questions (FAQ)

Q: Can the R5F11BBCAFP#50 be used as a direct replacement for the M37545G4GP#U0 without PCB modifications?

A: Yes, regarding physical placement. Both devices use the 32-LQFP (7x7) package with identical pin count and footprint dimensions, eliminating the need for PCB layout changes. However, firmware modifications are required due to architectural differences between the 8-bit 740 core and 16-bit RL78 core.

Q: What are the key electrical differences between these two microcontrollers?

A: The M37545G4GP#U0 operates at 4MHz with 16KB QzROM program memory and 512 x 8 bytes of RAM. The R5F11BBCAFP#50 operates at 32MHz with 32KB FLASH program memory, 5.5K x 8 bytes of RAM, and 4K x 8 bytes of EEPROM. The substitute provides eight times the operating speed and significantly expanded memory resources.

Q: Is the supply voltage range compatible between these parts?

A: The R5F11BBCAFP#50 supply voltage range (1.6V to 5.5V) fully encompasses the M37545G4GP#U0 specification (1.8V to 3.6V). Designs operating within the original voltage range will function with the substitute. The substitute supports extended voltage operation up to 5.5V if required by the application.

Q: What is the significance of the RoHS compliance difference?

A: The M37545G4GP#U0 is RoHS non-compliant, reflecting its legacy status. The R5F11BBCAFP#50 is ROHS3 compliant, meeting current environmental and regulatory requirements. For new designs or manufacturing environments subject to RoHS directives, the substitute is the appropriate selection.

Q: Are the peripheral features equivalent between these microcontrollers?

A: Both devices include LVD (Low Voltage Detect), POR (Power-On Reset), and WDT (Watchdog Timer) peripherals. The M37545G4GP#U0 includes LED peripheral support, while the R5F11BBCAFP#50 includes PWM (Pulse Width Modulation) capability. The substitute provides additional connectivity options including CSI, I2C, IrDA, LINbus, and UART/USART, which are not specified for the original part.

Q: What is the operating temperature range difference?

A: The M37545G4GP#U0 operates from -20°C to 85°C. The R5F11BBCAFP#50 operates from -40°C to 85°C, extending the lower temperature limit by 20°C. Applications requiring operation below -20°C benefit from the substitute's extended range.

Q: How does the program memory type difference affect substitution?

A: The M37545G4GP#U0 uses QzROM (mask-programmed read-only memory), while the R5F11BBCAFP#50 uses FLASH memory. FLASH memory provides in-system programmability and reprogrammability, offering greater flexibility for firmware updates and development cycles compared to mask-programmed QzROM.

Q: What is the I/O pin count difference?

A: The M37545G4GP#U0 provides 25 I/O pins, while the R5F11BBCAFP#50 provides 28 I/O pins. Both devices share the same 32-LQFP package, with the additional I/O pins available on the substitute for expanded application requirements.