Request Quote
(Ships tomorrow)
AT89C51RB2-SLSIM Equivalent & Substitute Parts
Part Overview
The AT89C51RB2-SLSIM is an 8-bit microcontroller from Microchip Technology's 89C series, featuring a 60MHz 80C51 core processor with 16KB FLASH program memory. This device is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and component procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Core Processor | 80C51 |
| Core Size | 8-Bit |
| Speed | 60MHz |
| Program Memory Size | 16KB (16K x 8) |
| Program Memory Type | FLASH |
| RAM Size | 1.25K x 8 |
| Number of I/O | 32 |
| Voltage Supply (Vcc/Vdd) | 2.7V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Connectivity | SPI, UART/USART |
| Peripherals | POR, PWM, WDT |
| Mounting Type | Surface Mount |
| Package / Case | 44-LCC (J-Lead) |
| Supplier Device Package | 44-PLCC (16.6x16.6) |
Substitute Part Grouping Explanation
Substitution eligibility for the AT89C51RB2-SLSIM is determined by strict equivalence across the following critical parameters:
- Core processor architecture (80C51)
- Core size (8-Bit)
- Operating frequency (60MHz)
- Program memory capacity and type (16KB FLASH)
- RAM capacity (1.25K x 8)
- I/O pin count (32)
- Supply voltage range (2.7V ~ 5.5V)
- Operating temperature range (-40°C ~ 85°C)
- Connectivity interfaces (SPI, UART/USART)
- Peripheral features (POR, PWM, WDT)
- Package form factor (44-LCC J-Lead / 44-PLCC)
The AT89C51RB2-SLSUM meets all substitution criteria as a direct equivalent part.
Parameter Comparison
| Parameter | AT89C51RB2-SLSIM (Main) | AT89C51RB2-SLSUM (Substitute) |
|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology |
| Series | 89C | 89C |
| Core Processor | 80C51 | 80C51 |
| Core Size | 8-Bit | 8-Bit |
| Speed | 60MHz | 60MHz |
| Program Memory Size | 16KB (16K x 8) | 16KB (16K x 8) |
| Program Memory Type | FLASH | FLASH |
| RAM Size | 1.25K x 8 | 1.25K x 8 |
| Number of I/O | 32 | 32 |
| Voltage Supply (Vcc/Vdd) | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Connectivity | SPI, UART/USART | SPI, UART/USART |
| Peripherals | POR, PWM, WDT | POR, PWM, WDT |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 44-LCC (J-Lead) | 44-LCC (J-Lead) |
| Supplier Device Package | 44-PLCC (16.6x16.6) | 44-PLCC (16.6x16.6) |
| Product Status | Obsolete | Active |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant |
| Packaging | Not specified | Tube |
Engineering Selection Recommendations
The AT89C51RB2-SLSUM is the direct functional equivalent for the obsolete AT89C51RB2-SLSIM. Both parts share identical electrical and mechanical specifications across all critical parameters. The primary distinction is product lifecycle status: the AT89C51RB2-SLSUM is active and available, while the AT89C51RB2-SLSIM is obsolete.
The AT89C51RB2-SLSUM additionally provides ROHS3 compliance, whereas the AT89C51RB2-SLSIM is RoHS non-compliant. For applications requiring regulatory compliance with current environmental standards, the AT89C51RB2-SLSUM is the appropriate selection. Both parts carry identical REACH and ECCN classifications.
Frequently Asked Questions (FAQ)
Q: Are AT89C51RB2-SLSIM and AT89C51RB2-SLSUM pin-for-pin compatible?
A: Yes. Both parts use the 44-LCC (J-Lead) package with 44-PLCC (16.6x16.6) form factor and identical pinout. Direct PCB substitution is supported without layout modification.
Q: What is the difference between the packaging designations SLSIM and SLSUM?
A: SLSIM indicates the original packaging configuration, while SLSUM specifies Tube packaging. The electrical and functional specifications remain identical between these variants.
Q: Can AT89C51RB2-SLSUM replace AT89C51RB2-SLSIM in existing designs?
A: Yes. The AT89C51RB2-SLSUM is functionally equivalent across all electrical, thermal, and mechanical parameters. No design changes are required for substitution.
Q: What is the significance of the RoHS compliance difference?
A: The AT89C51RB2-SLSUM meets ROHS3 compliance standards, while AT89C51RB2-SLSIM does not. For new designs or applications subject to environmental regulations, ROHS3 compliance is a material consideration.
Q: Are there inventory differences between these parts?
A: AT89C51RB2-SLSIM has 2299 units in stock, while AT89C51RB2-SLSUM has 3601 units available. Both are listed as new original stock.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts