Request Quote
(Ships tomorrow)
T89C51AC2-SLSIM Equivalent & Substitute Parts
Part Overview
The T89C51AC2-SLSIM is an 8-bit microcontroller from Microchip Technology based on the 80C51 core architecture. This device integrates 32KB of FLASH program memory, 1.25KB of RAM, and 2KB of EEPROM, operating at speeds up to 40MHz with a supply voltage range of 3V to 5.5V. The microcontroller features UART/USART connectivity, integrated peripherals including Power-On Reset (POR), Pulse Width Modulation (PWM), and Watchdog Timer (WDT), along with 34 I/O pins and an 8-channel 10-bit analog-to-digital converter.
The T89C51AC2-SLSIM is classified as obsolete. Locating equivalent or substitute components is necessary for ongoing system support, maintenance, and new design implementations where this architecture remains applicable.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Core Processor | 80C51 |
| Core Size | 8-Bit |
| Speed | 40MHz |
| Program Memory Size | 32KB (32K x 8) |
| Program Memory Type | FLASH |
| EEPROM Size | 2K x 8 |
| RAM Size | 1.25K x 8 |
| Voltage Supply (Vcc/Vdd) | 3V ~ 5.5V |
| Number of I/O | 34 |
| Data Converters | A/D 8x10b |
| Connectivity | UART/USART |
| Peripherals | POR, PWM, WDT |
| Oscillator Type | External |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
| Package / Case | 44-LCC (J-Lead) |
| Supplier Device Package | 44-PLCC (16.6x16.6) |
Substitute Part Grouping Explanation
Substitution of the T89C51AC2-SLSIM is determined by strict equivalence across the following critical parameters:
- Core Architecture: 80C51 processor core
- Memory Configuration: 32KB FLASH program memory, 2KB EEPROM, 1.25KB RAM
- Operating Frequency: 40MHz maximum speed
- Supply Voltage Range: 3V to 5.5V
- I/O Count: 34 pins
- Peripheral Set: UART/USART, POR, PWM, WDT
- Data Conversion: 8-channel 10-bit A/D converter
- Package Format: 44-PLCC (16.6x16.6) with 44-LCC J-Lead configuration
- Mounting Technology: Surface Mount
The AT89C51AC2-SLSUM meets all electrical and mechanical specifications required for direct substitution. Both devices share identical core processor architecture, memory organization, peripheral functionality, and physical packaging.
Parameter Comparison
| Parameter | T89C51AC2-SLSIM | AT89C51AC2-SLSUM |
|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology |
| Core Processor | 80C51 | 80C51 |
| Core Size | 8-Bit | 8-Bit |
| Speed | 40MHz | 40MHz |
| Program Memory Size | 32KB (32K x 8) | 32KB (32K x 8) |
| Program Memory Type | FLASH | FLASH |
| EEPROM Size | 2K x 8 | 2K x 8 |
| RAM Size | 1.25K x 8 | 1.25K x 8 |
| Voltage Supply (Vcc/Vdd) | 3V ~ 5.5V | 3V ~ 5.5V |
| Number of I/O | 34 | 34 |
| Data Converters | A/D 8x10b | A/D 8x10b |
| Connectivity | UART/USART | UART/USART |
| Peripherals | POR, PWM, WDT | POR, PWM, WDT |
| Oscillator Type | External | External |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| 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 |
| Moisture Sensitivity Level (MSL) | 2 (1 Year) | 3 (168 Hours) |
Engineering Selection Recommendations
The AT89C51AC2-SLSUM is a direct functional equivalent to the T89C51AC2-SLSIM. Both devices are manufactured by Microchip Technology and provide identical electrical performance and pin compatibility.
The AT89C51AC2-SLSUM carries an Active product status, ensuring ongoing availability and manufacturer support. The substitute part achieves ROHS3 compliance, whereas the original part is RoHS non-compliant. This distinction is significant for applications subject to environmental regulations or customer requirements mandating RoHS compliance.
The Moisture Sensitivity Level differs between the two parts: the original specifies MSL 2 (1 Year), while the substitute specifies MSL 3 (168 Hours). This parameter affects storage and handling requirements prior to assembly.
Frequently Asked Questions (FAQ)
Q: Are the T89C51AC2-SLSIM and AT89C51AC2-SLSUM pin-compatible?
A: Yes. Both devices use the 44-PLCC (16.6x16.6) package with 44-LCC J-Lead configuration. Pin assignments, electrical characteristics, and functional behavior are identical.
Q: Can the AT89C51AC2-SLSUM be used as a direct replacement in existing designs?
A: Yes. The substitute part meets all electrical and mechanical specifications of the original. No circuit modifications are required for functional substitution.
Q: What is the significance of the RoHS compliance difference?
A: The AT89C51AC2-SLSUM is ROHS3 compliant, while the T89C51AC2-SLSIM is RoHS non-compliant. For applications or markets requiring RoHS compliance, the substitute part satisfies regulatory requirements.
Q: How do the Moisture Sensitivity Levels affect component handling?
A: MSL ratings specify maximum storage duration at specified humidity levels before assembly. The original part (MSL 2, 1 Year) allows longer shelf life than the substitute (MSL 3, 168 Hours). Proper storage conditions and handling procedures must be observed according to the respective MSL classification.
Q: Is the AT89C51AC2-SLSUM currently available?
A: Yes. The substitute part carries an Active product status with documented inventory availability, whereas the original is classified as Obsolete.
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