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AT89C55WD-24AU

AT89C55WD-24AU

AT89C55WD-24AU

Microchip Technology

20KB 20K x 8 FLASH 8051 8-Bit Microcontroller 89C Series AT89C55 44 Pin 24MHz 5V 44-TQFP

SOT-23

AT89C55WD-24AU Datasheet PDF

non-compliant

Technical Specifications

Parameter NameValue
TypeParameter
Factory Lead Time 10 Weeks
Lifecycle Status Production (Last Updated: 2 years ago)
Contact PlatingTin
Mount Surface Mount
Mounting Type Surface Mount
Package / Case 44-TQFP
Surface MountYES
Number of Pins 44
Supplier Device Package 44-TQFP (10x10)
Number of Terminals 44
Mounting Style SMD/SMT
Instruction Set Architecture CISC
Clock Freq 24(MHz)
Operating Temperature Classification Industrial
Package Type TQFP
Number of Timers - General Purpose 3
Operating Temp Range -40C to 85C
# I/Os (Max) 32
Interface Type UART
Total Internal Ram Size 256B(kB)
Device Core Size 8(b)
Operating Supply Voltage (Max) 5.5(V)
Operating Supply Voltage (Typ) 5(V)
Rad Hardened No
Operating Supply Voltage (Min) 4(V)
Programmable Yes
Maximum Expanded Memory Size 64KB
Mounting Surface Mount
Data Converters --
Package Tray
Base Product Number AT89C55
Mfr Microchip Technology
Product Status Active
Number of I/Os 32 I/O
Maximum Operating Temperature+ 85 C
Minimum Operating Temperature - 40 C
Manufacturer Microchip
Brand Microchip Technology / Atmel
RoHS Details
Schedule B 8542310000, 8542310000/8542310000/8542310000/8542310000/8542310000
Package Shape SQUARE
Number of I/O Lines 32
Operating Temperature-40°C~85°C TA
PackagingTray
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 FormGULL WING
Peak Reflow Temperature (Cel) 260
Supply Voltage 5V
Terminal Pitch0.8mm
Reach Compliance Code compliant
Frequency 24MHz
Time@Peak Reflow Temperature-Max (s) 40
Base Part Number AT89C55
Pin Count44
JESD-30 Code S-PQFP-G44
Qualification StatusNot Qualified
Operating Temperature (Max) 85C
Operating Temperature (Min) -40C
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 1.2 mm
Number of Timers/Counters 3
Address Bus Width16
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 MCU
Product Category8-bit Microcontrollers - MCU
Device Core80C51
Height 1.05mm
Length 10.1mm
Width 10.1mm
REACH SVHC No SVHC
Radiation HardeningNo
RoHS StatusROHS3 Compliant
Lead Free Lead Free
In-Stock:2207 items

Pricing & Ordering

QuantityUnit PriceExt. Price
1$2.07000$2.07
25$1.89520$47.38
100$1.72010$172.01

AT89C55WD-24AU Product Details

AT89C55WD-24AU Overview


The package is 44-TQFP-shaped. There are 32 I/Os. In the case of the IC chip, the type of mounting is Surface Mount. Microcontroller is based on the 8-Bit core architecture. The type of program memory it uses is FLASH. Temperatures in the range of -40°C~85°C TA are operated by this Microcontroller. It is part of the 89C series of electrical components. Having a size of 20KB 20K x 8, Microcontroller has a program memory of X bytes. A 8051 Core Processor is at the core of this Microcontroller. This device belongs to the MICROCONTROLLER uPs/uCs/Peripheral ICs category. IC Chip 44 has 44 terminations. 8-bits are used for its size. IC Chip has 5V volt supply outputs. With NO DMA channels, Microcontroller chip can handle large data transfers. 20kB is the size of the memory in the IC part. Using the base part number AT89C55, you will be able to find alternatives for the part. Using a 24MHz frequency, this electronic part can perform efficiently. Devices work in NO PWM channels. On the chip, 44 pins are accessible. In total, there are 3 timers/counters on the device. The pin count is 44. There is an embedded the 8051 CPU family inside the device, which makes it a powerful device. There is FLASH memory on this piece of equipment. In addition, it comes with a 8051 core architecture. It has 32 Programmable Input/Output pins that can be programmed. A total of 8 UART channels are available on it.

AT89C55WD-24AU Features


44-TQFP package
Mounting type of Surface Mount
Minimum temperature of -40 °C


AT89C55WD-24AU Applications


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


  • Instrument control
  • Toys
  • Robots
  • Radio
  • Television
  • Heater/Fan
  • Calculator
  • Kindle
  • Christmas lights
  • 3D printers

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