Microchip Technology AT89C55WD-24JU Microcontroller, Microprocessor, FPGA Modules
IC MCU 8BIT 20KB FLASH 44PLCC
Same model may have multiple batches, images only for reference.
Manufacturer
Part Number (MPN)
AT89C55WD-24JU
Series
Detailed Description
IC MCU 8BIT 20KB FLASH 44PLCC
Package
44-LCC (J-Lead)
Key Features
Package / Case: 44-LCC (J-Lead); Mounting Type: Surface Mount
Lifecycle Status
Active
RoHS State
RoHS Compliant
Datasheet
AT89C55WD-24JU Datasheet
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Technical Specifications
Microchip Technology AT89C55WD-24JU Microcontroller, Microprocessor, FPGA Modules technical specifications.
General
RAM Size
256 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
4.5V ~ 5.5V
Lifecycle Status
Active
Peripherals
WDT
Number of I/O
32
Alternate Parts Comparison (AT89C55WD-24JU vs AT89C1051-24PC vs AT89C52-24JC vs AT89C51-24AC)
Side-by-side technical parameter comparison of related primary models in this product family.
| This Part | Alternate Parts | Alternate Parts | Alternate Parts | |
|---|---|---|---|---|
| Package / Case | 44-LCC | -- | 44-LCC | 44-TQFP |
| Mounting Type | Surface Mount | -- | Surface Mount | Surface Mount |
| Operating Temperature | -40°C ~ 85°C (TA) | -- | 0°C ~ 70°C | 0°C ~ 70°C |
| Supply Voltage | 4.5V ~ 5.5V | -- | 4V ~ 6V | 4V ~ 6V |
| Core Processor | 8051 | -- | 8051 | 8051 |
| Core Size | 8-Bit | -- | 8-Bit | 8-Bit |
| RAM Size | 256 x 8 | -- | 256 x 8 | 128 x 8 |
| RoHS | Yes | -- | Yes | Yes |
| Lifecycle Status | Active | -- | Obsolete | Obsolete |
| Connectivity | UART/USART | -- | SIO, UART/USART | UART/USART |
| Number of I/O | 32 | -- | 32 | 32 |
| Oscillator Type | Internal | -- | Internal | Internal |
| 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
S9S08AW32E5CPUENXP SemiconductorsNXP
IC MCU 8BIT 32KB FLASH 64LQFP
MC9S08GT32ACFBENXP SemiconductorsNXP
IC MCU 8BIT 32KB FLASH 44QFP
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