×
Futurlec - The Electronic Components and Semiconductor Superstore
View Cart


AT89C55-33JC - AT89C55 44-Pin 33MHz 8kb 8-bit Microcontroller Technical Data - Buy AT89C55-33JC

Photograph
AT89C55-33JC - AT89C55 44-Pin 33MHz 8kb 8-bit Microcontroller

Features

arrowCompatible with MCS-51 Products

arrow20K Bytes of In-System Reprogrammable Flash Memory

arrow4V to 5.5V Operating Range

arrowFully Static Operation: 0 Hz to 24 MHz

arrowThree-level Program Memory Lock

arrow256 x 8-bit Internal RAM

arrow32 Programmable I/O Lines

arrowThree 16-bit Timer/Counters

arrowEight Interrupt Sources

arrowProgrammable Serial Channel

arrowLow-power Idle and Power-down Mode

arrowInterrupt Recovery from Power-down Mode

arrowHardware Watchdog Timer

arrowDual Data Pointer

arrowPower-off Flag

arrow44-pin PLCC


Pin Layout
AT89C55 Pin Layout

Pin Description
Pin Number Description
1 NC - Not Connected
2 - 9 P1.0 - P1.7 - Port 1
10 RST - Reset
11 P3.0 - Port 3
12 NC - Not Connected
13 - 19 P3.1 - P3.7 - Port 3
20 XTAL2 - Crystal
21 XTAL1 - Crystal
22 GND - Ground
23 NC - Not Connected
24 - 31 P2.0 - P2.7 - Port 2
32 PSEN - Program Store Enable
33 ALE/PROG - Address Latch Enable
34 NC - Not Connected
35 EA/Vpp - External Access Enable
36 - 43 P0.7 - P0.1 - Port 0
44 Vcc - Positive Power Supply

Dimensional Drawing
PLCC44 Dimension Drawing

Technical Data

Data Sheet

Microchip Web Site - Data Sheet for AT89C52 Datasheet

Application Notes