Microchip Technology AT89C55WD-24PU Microcontrollers
IC MCU 8BIT 20KB FLASH 40DIP
Same model may have multiple batches, images only for reference.
Manufacturer
Part Number (MPN)
AT89C55WD-24PU
Series
Base Model
Detailed Description
IC MCU 8BIT 20KB FLASH 40DIP
Package
40-DIP (0.600", 15.24mm)
Lifecycle Status
Active
Datasheet
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Technical Specifications
Microchip Technology AT89C55WD-24PU Microcontrollers technical specifications.
General
RAM Size
256 x 8
RoHS
Yes
Number of Pins
44
Package / Case
40-DIP
Mounting Type
Through Hole
Operating Temperature
-40°C ~ 85°C (TA)
Supply Voltage
4.5V ~ 5.5V
Lifecycle Status
Active
Peripherals
WDT
Number of I/O
32
Related Parts Comparison (AT89C55WD-24PU vs AT89C1051-24PC vs AT89C52-24JC vs AT89C51-24AC)
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 | 40-DIP | -- | 44-LCC | 44-TQFP |
| Mounting Type | Through Hole | -- | 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 .
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