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AT89C55WD-33AC

AT89C55WD-33AC

AT89C55WD-33AC

Atmel (Microchip Technology)

Microcontroller 44 Pin 5V TQFP

SOT-23

AT89C55WD-33AC Datasheet PDF

non-compliant

Technical Specifications

Parameter NameValue
TypeParameter
Package / Case TQFP
Surface MountYES
Number of Pins 44
JESD-609 Code e0
Pbfree Code no
Moisture Sensitivity Level (MSL) 3 (168 Hours)
Number of Terminations 44
Terminal Finish Tin/Lead (Sn/Pb)
Max Operating Temperature85°C
Min Operating Temperature -40°C
Terminal Position QUAD
Terminal FormGULL WING
Peak Reflow Temperature (Cel) 240
Supply Voltage 5V
Terminal Pitch0.8mm
Time@Peak Reflow Temperature-Max (s) 30
Pin Count44
Power Supplies5V
Temperature GradeCOMMERCIAL
Max Supply Voltage5.5V
Min Supply Voltage4.5V
Memory Size20kB
Number of I/O 32
RAM Size 256B
Memory TypeFLASH
uPs/uCs/Peripheral ICs Type MICROCONTROLLER
Supply Current-Max 25mA
Bit Size 8
Frequency (Max) 33MHz
Access Time 33 μs
Has ADC NO
DMA Channels NO
Data Bus Width 8b
PWM Channels NO
DAC Channels NO
Number of Timers/Counters 3
Address Bus Width16
ROM (words) 20480
Core Architecture 8051
On Chip Program ROM Width 8
Number of Programmable I/O 32
RAM (bytes) 256
Length 10mm
Height Seated (Max) 1.2mm
Radiation HardeningNo
RoHS StatusRoHS Compliant
Lead Free Contains Lead
In-Stock:3846 items

AT89C55WD-33AC Product Details

AT89C55WD-33AC Overview


The package is TQFP-shaped. There are 32 I/Os. 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. 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 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.

AT89C55WD-33AC Features


TQFP package
Minimum temperature of -40°C


AT89C55WD-33AC Applications


There are a lot of Atmel (Microchip Technology)
AT89C55WD-33AC Microcontroller applications.


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

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