Microchip Technology AT89C55WD-24AU Microcontrollers
IC MCU 8BIT 20KB FLASH 44TQFP
Same model may have multiple batches, images only for reference.
Manufacturer
Part Number (MPN)
AT89C55WD-24AU
Series
Base Model
Detailed Description
IC MCU 8BIT 20KB FLASH 44TQFP
Package
TQFP-44
Lifecycle Status
Active
Datasheet
AT89C55WD-24AU Datasheet
Quick Jump:
Technical Specifications
Microchip Technology AT89C55WD-24AU Microcontrollers technical specifications.
General
RoHS
Yes
Package
TQFP-44
Related Parts Comparison (AT89C55WD-24AU vs AT89C51CC03CA-RDTUM vs AT89C51CC02CA-TISUM vs AT89C51SND1C-ROTUL)
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 | |
|---|---|---|---|---|
| RoHS | Yes | Yes | -- | Yes |
| Package | TQFP-44 | LQFP-64 | -- | TQFP-80 |
| Package / Case | -- | 64-LQFP | 28-SOIC | 80-LQFP |
| Mounting Type | -- | Surface Mount | Surface Mount | Surface Mount |
| Operating Temperature | -- | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Supply Voltage | -- | 3V ~ 5.5V | 3V ~ 5.5V | 2.7V ~ 3.3V |
| Core Processor | -- | 80C51 | 80C51 | 80C51 |
| Core Size | -- | 8-Bit | 8-Bit | 8-Bit |
| RAM Size | -- | 2.25K x 8 | 512 x 8 | 2.25K x 8 |
| Lifecycle Status | -- | Active | Active | Obsolete |
| Connectivity | -- | CANbus, SPI, UART/USART | CANbus, UART/USART | I²C, IDE/ATAPI, Memory Card, SPI, UART/USART, USB |
| Data Converters | -- | A/D 8x10b | A/D 8x10b | A/D 2x10b |
| 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
More Parts in Microcontrollers
Browse additional parts from the same category, grouped by series, package type, and manufacturer. These are catalog suggestions — not verified pin-compatible alternates.
