AT89C51RC2-3CSIM Equivalent & Substitute Parts

Part Overview

The AT89C51RC2-3CSIM is an 8-bit microcontroller from Microchip Technology's 89C series, featuring 32KB FLASH program memory, 1.25KB RAM, and 32 I/O pins in a 40-PDIL package. This device operates at 60MHz with a supply voltage range of 2.7V to 5.5V and includes integrated peripherals such as SPI, UART/USART, POR, PWM, and WDT functionality.

The AT89C51RC2-3CSIM is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure component availability, and support legacy system maintenance and production requirements.

Substiute Parts

AT89C51RC2-3CSIM

Microchip TechnologyIn Stock: 781AT89C51RC2-3CSIM Datasheet

Current PartRFQ

AT89C51RC2-3CSUM

Microchip TechnologyIn Stock: 2153AT89C51RC2-3CSUM Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT89C51RC2-3CSIM is determined by strict equivalence across the following critical parameters:

• Core Processor Architecture: 80C51 instruction set compatibility
• Memory Configuration: 32KB FLASH program memory and 1.25KB RAM
• I/O Count: 32 I/O pins
• Operating Frequency: 60MHz maximum speed
• Supply Voltage Range: 2.7V to 5.5V
• Package Type: 40-DIP form factor
• Peripheral Set: SPI, UART/USART, POR, PWM, WDT
• Temperature Range: -40°C to 85°C

The AT89C51RC2-3CSUM meets all these criteria and qualifies as a direct functional equivalent. Differences in packaging format (Tube vs. standard packaging) and product status do not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The AT89C51RC2-3CSUM is the direct substitute for the AT89C51RC2-3CSIM. All electrical and mechanical parameters are identical, ensuring pin-for-pin and functional compatibility.

Product Status Consideration: The AT89C51RC2-3CSIM is obsolete, while the AT89C51RC2-3CSUM maintains active product status. Selection of the active part ensures ongoing availability and support.

Compliance Consideration: The AT89C51RC2-3CSUM is ROHS3 compliant, whereas the AT89C51RC2-3CSIM is RoHS non-compliant. For applications subject to RoHS regulations, the AT89C51RC2-3CSUM is the appropriate selection.

Packaging Format: The AT89C51RC2-3CSUM is supplied in Tube packaging. This difference does not affect electrical performance or mechanical fit in standard 40-DIP sockets.

Frequently Asked Questions (FAQ)

Q: Can the AT89C51RC2-3CSUM be used as a direct replacement for the AT89C51RC2-3CSIM?

A: Yes. The AT89C51RC2-3CSUM is electrically and mechanically equivalent. All core parameters—processor architecture, memory configuration, I/O count, operating frequency, supply voltage, package type, and peripheral set—are identical. The parts are pin-for-pin compatible and require no circuit modifications.

Q: What is the difference between the AT89C51RC2-3CSIM and AT89C51RC2-3CSUM?

A: The primary differences are product status and compliance certification. The AT89C51RC2-3CSIM is obsolete and RoHS non-compliant. The AT89C51RC2-3CSUM is active and ROHS3 compliant. Packaging format also differs (standard vs. Tube), but this does not affect functionality or socket compatibility.

Q: Are there any circuit design changes required when switching to the AT89C51RC2-3CSUM?

A: No circuit design changes are required. The AT89C51RC2-3CSUM maintains identical electrical specifications, pin assignments, and functional behavior. Existing PCB layouts and firmware are fully compatible.

Q: Does the 40-DIP package format remain the same?

A: Yes. Both parts use the 40-DIP (0.600", 15.24mm) package format. Physical dimensions, pin spacing, and socket compatibility are identical.

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

A: RoHS3 compliance indicates the AT89C51RC2-3CSUM meets current environmental and hazardous substance restrictions. For applications subject to RoHS regulations or customer requirements, the AT89C51RC2-3CSUM is the appropriate selection.