AT89C51RB2-SLRIL Equivalent & Substitute Parts

Part Overview

The AT89C51RB2-SLRIL is an 8-bit microcontroller from the 89C series manufactured by Microchip Technology. This device integrates an 80C51 core processor with 16KB of FLASH program memory, 1.25KB of RAM, and 32 I/O pins in a 44-PLCC surface mount package. The part operates at 40MHz with a supply voltage range of 2.7V to 3.6V and includes integrated peripherals such as SPI, UART/USART connectivity, power-on reset (POR), pulse-width modulation (PWM), and watchdog timer (WDT) functionality.

The AT89C51RB2-SLRIL is classified as obsolete. Locating equivalent or substitute components is necessary for ongoing production support, design updates, or inventory replenishment when original stock becomes unavailable.

Substiute Parts

AT89C51RB2-SLRIL

Microchip TechnologyIn Stock: 1122AT89C51RB2-SLRIL Datasheet

Current PartRFQ

AT89C51RB2-SLRUL

AtmelIn Stock: 1440AT89C51RB2-SLRUL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT89C51RB2-SLRIL is determined by strict equivalence across the following critical parameters:

• Core Processor Architecture: 80C51 core
• Memory Configuration: 16KB FLASH program memory, 1.25KB RAM
• I/O Count: 32 I/O pins
• Operating Frequency: 40MHz
• Supply Voltage Range: 2.7V ~ 3.6V
• Connectivity Interfaces: SPI and UART/USART
• Integrated Peripherals: POR, PWM, WDT
• Package Type: 44-PLCC (16.6x16.6) with 44-LCC J-Lead configuration
• Mounting Technology: Surface Mount

The AT89C51RB2-SLRUL meets all substitution criteria and is classified as a direct equivalent based on identical electrical specifications, memory architecture, I/O configuration, and physical packaging.

Parameter Comparison

Engineering Selection Recommendations

The AT89C51RB2-SLRUL is a direct functional and electrical equivalent to the AT89C51RB2-SLRIL. Both devices share identical core processor architecture, memory configuration, I/O pin count, operating frequency, supply voltage specifications, and physical packaging.

The primary distinction between these parts is product lifecycle status. The AT89C51RB2-SLRIL is classified as obsolete, while the AT89C51RB2-SLRUL maintains active product status. For new designs or ongoing production requiring long-term component availability, the AT89C51RB2-SLRUL is the appropriate selection. Both parts are manufactured to the same electrical and mechanical specifications, ensuring functional interchangeability in applications designed for the 80C51 architecture with 16KB FLASH memory and 32 I/O pins.

Frequently Asked Questions (FAQ)

Q: Can the AT89C51RB2-SLRUL be used as a direct replacement for the AT89C51RB2-SLRIL?

A: Yes. Both parts are electrically and mechanically equivalent. They share identical core processor architecture, memory size, I/O configuration, operating frequency, supply voltage range, and 44-PLCC package specifications. No circuit modifications are required for substitution.

Q: What is the difference between the AT89C51RB2-SLRIL and AT89C51RB2-SLRUL?

A: The primary difference is product status. The AT89C51RB2-SLRIL is obsolete, while the AT89C51RB2-SLRUL is active. Both devices are functionally identical with respect to electrical performance and physical packaging.

Q: Are there any compatibility concerns when switching from AT89C51RB2-SLRIL to AT89C51RB2-SLRUL?

A: No compatibility concerns exist. Both parts conform to the same 44-PLCC (16.6x16.6) package specification with 44-LCC J-Lead configuration. Pin assignments, electrical characteristics, and operating parameters are identical.

Q: What parameters determine substitution eligibility for 80C51-based microcontrollers?

A: Substitution eligibility is determined by matching core processor type, program memory size and type, RAM capacity, I/O pin count, operating frequency, supply voltage range, connectivity interfaces, integrated peripherals, and physical package configuration. All these parameters must align for functional equivalence.

Q: Why is the AT89C51RB2-SLRIL classified as obsolete?

A: Product obsolescence reflects the end of manufacturing and support lifecycle. The AT89C51RB2-SLRUL, manufactured by Atmel, maintains active status and represents the current equivalent for ongoing production and design applications.