Atmel Corporation Microcontrollers AT89C55WD-24AU

8051 89C Microcontroller IC 8-Bit 24MHz 20KB (20K x 8) FLASH 44-TQFP (10x10)

Microcontroller, 8-Bit, FLASH, 80C51 CPU, 24MHz, CMOS, PQFP44

Manufacturer: Microchip Technology
Win Source Part Number: 1019739-AT89C55WD-24AU
Packaging: Tray
Core Processor: 8051
Number of I/O: 32
Program Memory Size: 20KB (20K x 8)
Program Memory Type: FLASH
Family Name: AT89C55
Categories: Integrated Circuits
Status: Active
Temperature Range - Operating: -40°C to 85°C (TA)
Case / Package: 44-TQFP (10x10)
Speed(Frequency): 24MHz
Supply Voltage - Operating: 4.5 V to 5.5 V
Part Core Size: 8-Bit
Data RAM Size: 256 x 8
Alternative Parts (Cross-Reference): P89C51RC2FBD/01,55; P89C51RC2FBD/01; P89C51RC2FBD/01,557; P89C51RC2BBD/01,557;
Introduction Date: October 09, 1996
ECCN: 3A991.a.2
Country of Origin: Republic of Korea, Taiwan
Estimated EOL Date: 2026
Halogen Free: Compliant
Is this a common-used part?: Yes
Popularity: High
Fake Threat In the Open Market: 58 pct.
Supply and Demand Status: Balance

IC MCU 8BIT 20KB FLASH 44TQFP Product overview: AT89C55WD-24AU from Microchip Technology is an Embedded Microcontroller MCU for industrial control, IoT devices, embedded automation, motor control, metering, and low-power board designs. It is useful for engineers and buyers comparing datasheets, replacement parts, BOM lines, package options, lifecycle status, and procurement availability. Key searchable attributes include 8-bit, 8BIT, 20KB. Search-friendly keywords include microcontroller, MCU, embedded control, ARM Cortex, Flash memory, low-power, 8-bit, 8BIT, 20KB, Embedded Microcontroller MCU. This listing supports clearer product discovery for industrial, commercial, repair, automation, power, sensing, and embedded system projects. Product number 685-AT89C55WD-24AU can be used for catalog matching and distributor lookup.