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AT89C55WD-24JU

AT89C55WD-24JU

AT89C55WD-24JU

Microchip Technology

20KB 20K x 8 FLASH 8051 8-Bit Microcontroller 89C Series AT89C55 44 Pin 24MHz 5V 44-LCC (J-Lead)

SOT-23

AT89C55WD-24JU Datasheet PDF

non-compliant

Technical Specifications

Parameter NameValue
TypeParameter
Factory Lead Time 9 Weeks
Lifecycle Status Production (Last Updated: 2 years ago)
Mount Surface Mount
Mounting Type Surface Mount
Package / Case 44-LCC (J-Lead)
Surface MountYES
Number of Pins 44
Supplier Device Package 44-PLCC (16.59x16.59)
Number of Terminals 44
Mounting Style SMD/SMT
Data Converters --
Family Name AT89
Instruction Set Architecture CISC
Dimensions 16.66 x 16.66 x 4.06mm
Typical Operating Supply Voltage 4 → 5.5 V
Package Type PLCC
Maximum Operating Temperature+85 °C
Minimum Operating Temperature -40 °C
MSL MSL 2 - 1 year
Qualification -
Interfaces UART
Number of I/Os 32 I/O
Interface Type UART
Manufacturer Microchip
Brand Microchip Technology / Atmel
RoHS Details
Schedule B 8542310000, 8542310000/8542310000/8542310000/8542310000/8542310000
Package Tube
Base Product Number AT89C55
Mfr Microchip Technology
Product Status Active
Package Shape SQUARE
Number of I/O Lines 32
Operating Temperature-40°C~85°C TA
PackagingTube
Series 89C
Published 1996
JESD-609 Code e3
Pbfree Code yes
Part StatusActive
Moisture Sensitivity Level (MSL) 3 (168 Hours)
Number of Terminations 44
Terminal Finish Matte Tin (Sn) - annealed
Max Operating Temperature85 °C
Min Operating Temperature -40 °C
Terminal Position QUAD
Terminal FormJ BEND
Peak Reflow Temperature (Cel) 245
Supply Voltage 5V
Terminal Pitch1.27mm
Reach Compliance Code compliant
Frequency 24MHz
Time@Peak Reflow Temperature-Max (s) 40
Base Part Number AT89C55
Pin Count44
JESD-30 Code S-PQCC-J44
Qualification StatusNot Qualified
Operating Supply Voltage5V
Power Supplies5V
Temperature GradeINDUSTRIAL
Interface UART, USART
Max Supply Voltage5.5 V
Min Supply Voltage4 V
Memory Size20kB
Oscillator TypeInternal
Number of I/O 32
Speed 24MHz
RAM Size 256 x 8
Memory TypeFLASH
Voltage - Supply (Vcc/Vdd) 4.5V~5.5V
uPs/uCs/Peripheral ICs Type MICROCONTROLLER
Core Processor 8051
Peripherals WDT
Program Memory TypeFLASH
Core Size 8-Bit
Program Memory Size 20KB 20K x 8
Connectivity UART/USART
Supply Current-Max 25 mA
Bit Size 8
Watchdog TimerYes
Access Time 24 μs
Has ADC NO
DMA Channels NO
Data Bus Width 8b
PWM Channels NO
DAC Channels NO
Seated Height-Max 4.572 mm
Number of Timers/Counters 3
Address Bus Width8b
Product Type8-bit Microcontrollers - MCU
ROM (words) 20480
Core Architecture 8051
EEPROM Size --
CPU Family 8051
Max Frequency 24 MHz
External Data Bus Width 8
Number of Programmable I/O 32
Number of UART Channels 1
RAM (bytes) 256
ROM Programmability FLASH
Product Category8-bit Microcontrollers - MCU
Device Core8051
Height 4.064mm
Length 16.66mm
Width 16.662mm
REACH SVHC No SVHC
Radiation HardeningNo
RoHS StatusROHS3 Compliant
Lead Free Lead Free
In-Stock:1240 items

Pricing & Ordering

QuantityUnit PriceExt. Price
1$2.56000$2.56
25$2.35880$58.97
100$2.13210$213.21

AT89C55WD-24JU Product Details

AT89C55WD-24JU Overview


Packaged in a 44-LCC (J-Lead) format, this MCU is available in a compact size. There are 32 I/Os on the Microcontroller. It is important to note that the Microcontroller has a Surface Mount mounting type. 8-Bit core is the basis for this Microcontroller. This program has a type of memory called FLASH for this MCU's program memory. Temperatures in this range are operated by this Microcontroller. The 89C series includes this electrical component. There is 20KB 20K x 8 bytes of program memory in MCU, which corresponds to the size of the program. With a 8051 Core processor, MCU is equipped with the latest technology available. This is a MICROCONTROLLER uPs/uCs/Peripheral IC. During the manufacturing process, 44 terminations were applied to the IC chip. 8-bits are used in Microcontroller. The MCU chip's supply output is 5V volts. Currently, MCU chip has NO DMA channels. 20kB memory size belongs to the Chip part. Alternatives can be found by looking at the base part number AT89C55. In the case of 24MHz frequency operation, it can perform efficiently. There are NO PWM channels on the device. The chip has 44 pins. The clock has 3 timers/counters to keep track of the time. 44 pins are counted on this board. This device is embedded with a 8051 processor family, which is a powerful and efficient CPU. There is a FLASH memory feature on this equipment. With 8051 core architecture, it offers high performance. A total of 32 programmable I/Os are available on this board. There are 1 UART channels available on this board.

AT89C55WD-24JU Features


44-LCC (J-Lead) package
Mounting type of Surface Mount
Minimum temperature of -40 °C


AT89C55WD-24JU Applications


There are a lot of Microchip Technology
AT89C55WD-24JU Microcontroller applications.


  • Equipment control
  • Instrument control
  • Toys
  • Robots
  • Radio
  • Television
  • Heater/Fan
  • Calculator
  • Kindle
  • Christmas lights

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