Microchip Technology AT89S51-24JU Microcontrollers
IC MCU 8BIT 4KB FLASH 44PLCC
Same model may have multiple batches, images only for reference.
Manufacturer
Part Number (MPN)
AT89S51-24JU
Base Model
Detailed Description
IC MCU 8BIT 4KB FLASH 44PLCC
Package
44-LCC (J-Lead)
Lifecycle Status
Active
Datasheet
AT89S51-24JU Datasheet
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Technical Specifications
Microchip Technology AT89S51-24JU Microcontrollers technical specifications.
General
RAM Size
128 x 8
RoHS
Yes
Number of Pins
44
Package / Case
44-LCC
Mounting Type
Surface Mount
Operating Temperature
-40°C ~ 85°C (TA)
Supply Voltage
4V ~ 5.5V
Lifecycle Status
Active
Peripherals
WDT
Number of I/O
32
Related Parts Comparison (AT89S51-24JU vs AT89S8253-24AU vs AT89S8253-24PU vs AT89S8253-24JU)
Side-by-side specifications of related catalog parts.
Engineering verification required. Related parts may have different electrical ratings, pinouts, footprints, and operating limits. Verify suitability for your circuit before substitution.
| This Part | Related Part | Related Part | Related Part | |
|---|---|---|---|---|
| Package / Case | 44-LCC | 44-TQFP | 40-DIP | 44-LCC |
| Mounting Type | Surface Mount | Surface Mount | Through Hole | Surface Mount |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Supply Voltage | 4V ~ 5.5V | 2.7V ~ 5.5V | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| Number of Pins | 44 | 44 | 44 | 44 |
| Core Processor | 8051 | 8051 | 8051 | 8051 |
| Core Size | 8-Bit | 8-Bit | 8-Bit | 8-Bit |
| RAM Size | 128 x 8 | 256 x 8 | 256 x 8 | 256 x 8 |
| RoHS | Yes | Yes | Yes | Yes |
| Lifecycle Status | Active | Active | Active | Active |
| ADC Channels | 0 | 0 | 0 | 0 |
| Connectivity | UART/USART | SPI, UART/USART | SPI, UART/USART | SPI, UART/USART |
| Action |
Cross Reference
Manufacturer-stated alternates from official cross-reference tools. These are not a guaranteed pin-compatible drop-in. Qualify package, pinout, and electrical limits against the datasheet before a board change. See cross-reference vs drop-in compatible .
Suggested replacements
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IC MCU 8BIT 8KB FLASH 24QFN
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