AT89C55WD-24AU
IC MCU 8BIT 20KB FLASH 44TQFP
Embedded Microcontrollers
44-TQFP
89C
Active
$2.22 / unit (market reference)
MOQ: 136 pcs
Submit your quantity via the inquiry form for a competitive quote within 24 hours.
Parameters
| Parameter | Value |
|---|---|
| Brand | Rochester Electronics, LLC |
| Model | AT89C55WD-24AU |
| Package / Case | 44-TQFP |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Core Processor | 8051 |
| Speed | 24MHz |
| Program Memory Size | 20KB (20K x 8) |
| RAM Size | 256 x 8 |
| Number of I/O | 32 |
| Voltage - Supply | 4.5V ~ 5.5V |
| Connectivity | UART/USART |
| Peripherals | WDT |
| Supplier Device Package | 44-TQFP (10x10) |
| RoHS | RoHS |
| Part Status | Active |
Application & Notes
AT89C55WD-24AU by Rochester Electronics, LLC is a 8051 microcontroller widely used in industrial control, motor drives, IoT devices, 3D printer mainboards, and consumer electronics. The 44-TQFP package fits automated SMT assembly. Operating temperature is -40°C ~ 85°C (TA) — verify your application environment. Pin-compatible domestic alternatives include GigaDevice GD32 series and Artery AT32 series — note GD32 ADC specs may differ slightly from ST originals.
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All Technical Specifications
| Speed | 24MHz |
| RAM Size | 256 x 8 |
| Core Size | 8-Bit |
| Peripherals | WDT |
| Connectivity | UART/USART |
| Number of I/O | 32 |
| Core Processor | 8051 |
| Oscillator Type | Internal |
| Program Memory Size | 20KB (20K x 8) |
| Program Memory Type | FLASH |
| Voltage - Supply (Vcc/Vdd) | 4.5V ~ 5.5V |
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