AT89C51-24PI

AT89C51-24PI Datasheet


The AT89C51 is a low-power, high-performance CMOS 8-bit microcomputer with 4K bytes of Flash programmable and erasable read only memory PEROM . The device is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry-standard MCS-51 instruction set and pinout. The on-chip Flash allows the program memory to be reprogrammed in-system or by a conventional nonvolatile memory programmer. By combining a versatile 8-bit CPU with Flash on a monolithic chip, the Atmel AT89C51 is a powerful microcomputer which provides a highly-flexible and cost-effective solution to many embedded control applications.

Part Datasheet
AT89C51-24PI AT89C51-24PI AT89C51-24PI (pdf)
Related Parts Information
AT89C51-24AI AT89C51-24AI AT89C51-24AI
AT89C51-24JC AT89C51-24JC AT89C51-24JC
AT89C51-24JI AT89C51-24JI AT89C51-24JI
AT89C51-24PC AT89C51-24PC AT89C51-24PC
AT89C51-24AC AT89C51-24AC AT89C51-24AC
PDF Datasheet Preview
• Compatible with MCS-51 Products
• 4K Bytes of In-System Reprogrammable Flash Memory

Endurance 1,000 Write/Erase Cycles
• Fully Static Operation 0 Hz to 24 MHz
• Three-level Program Memory Lock
• 128 x 8-bit Internal RAM
• 32 Programmable I/O Lines
• Two 16-bit Timer/Counters
• Six Interrupt Sources
• Programmable Serial Channel
• Low-power Idle and Power-down Modes

The AT89C51 is a low-power, high-performance CMOS 8-bit microcomputer with 4K bytes of Flash programmable and erasable read only memory PEROM . The device is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry-standard MCS-51 instruction set and pinout. The on-chip Flash allows the program memory to be reprogrammed in-system or by a conventional nonvolatile memory programmer. By combining a versatile 8-bit CPU with Flash on a monolithic chip, the Atmel AT89C51 is a powerful microcomputer which provides a highly-flexible and cost-effective solution to many embedded control applications.

WR P3.6 12 RD P3.7 13

XTAL2 14 XTAL1 15

GND 16 GND 17 A8 P2.0 18 A9 P2.1 19 A10 P2.2 20 A11 P2.3 21 A12 P2.4 22
44 P1.4 43 P1.3 42 P1.2 41 P1.1 T2 EX 40 P1.0 T2 39 NC 38 VCC 37 P0.0 AD0 36 P0.1 AD1 35 P0.2 AD2 34 P0.3 AD3

Pin Configurations

PQFP/TQFP

P1.5 1 P1.6 2 P1.7 3 RST 4 RXD P3.0 5

NC 6 TXD P3.1 7 INT0 P3.2 8 INT1 P3.3 9

T0 P3.4 10 T1 P3.5 11
33 PO.4 AD4 32 P0.5 AD5 31 P0.6 AD6 30 P0.7 AD7 29 EA/VPP 28 NC 27 ALE/PROG 26 PSEN 25 P2.7 A15 24 P2.6 A14 23 P2.5 A13

PDIP

P1.0 1 P1.1 2 P1.2 3 P1.3 4 P1.4 5 P1.5 6 P1.6 7 P1.7 8 RST 9 RXD P3.0 10 TXD P3.1 11 INT0 P3.2 12 INT1 P3.3 13 T0 P3.4 14 T1 P3.5 15 WR P3.6 16 RD P3.7 17 XTAL2 18 XTAL1 19 GND 20
40 VCC 39 P0.0 AD0 38 P0.1 AD1 37 P0.2 AD2 36 P0.3 AD3 35 P0.4 AD4 34 P0.5 AD5 33 P0.6 AD6 32 P0.7 AD7 31 EA/VPP 30 ALE/PROG 29 PSEN 28 P2.7 A15 27 P2.6 A14 26 P2.5 A13 25 P2.4 A12 24 P2.3 A11 23 P2.2 A10 22 P2.1 A9 21 P2.0 A8

PLCC
6 P1.4 5 P1.3 4 P1.2 3 P1.1 2 P1.0 1 NC 44 VCC 43 P0.0 AD0 42 P0.1 AD1 41 P0.2 AD2 40 P0.3 AD3

P1.5 7 P1.6 8 P1.7 9 RST 10 RXD P3.0 11

NC 12 TXD P3.1 13 INT0 P3.2 14 INT1 P3.3 15

T0 P3.4 16 T1 P3.5 17
39 PO.4 AD4 38 P0.5 AD5 37 P0.6 AD6 36 P0.7 AD7 35 EA/VPP 34 NC 33 ALE/PROG 32 PSEN 31 P2.7 A15 30 P2.6 A14 29 P2.5 A13
8-bit Microcontroller with 4K Bytes Flash

AT89C51

Not Recommended for New Designs. Use AT89S51.

WR P3.6 18 RD P3.7 19

XTAL2 20 XTAL1 21

GND 22 NC 23

A8 P2.0 24 A9 P2.1 25 A10 P2.2 26 A11 P2.3 27 A12 P2.4 28

Block Diagram

VCC GND

RAM ADDR. REGISTER

P0.0 - P0.7 PORT 0 DRIVERS

P2.0 - P2.7 PORT 2 DRIVERS

PORT 0 LATCH

PORT 2 LATCH

FLASH

B REGISTER

STACK POINTER

PROGRAM ADDRESS REGISTER

PSEN ALE/PROG
Ordering Information

Speed MHz

Power Supply
5V ± 20%
5V ± 20%
5V ± 20%
5V ± 20%
Ordering Code AT89C51-12AC AT89C51-12JC AT89C51-12PC AT89C51-12QC AT89C51-12AI AT89C51-12JI AT89C51-12PI AT89C51-12QI AT89C51-16AC AT89C51-16JC AT89C51-16PC AT89C51-16QC AT89C51-16AI AT89C51-16JI AT89C51-16PI AT89C51-16QI AT89C51-20AC AT89C51-20JC AT89C51-20PC AT89C51-20QC AT89C51-20AI AT89C51-20JI AT89C51-20PI AT89C51-20QI AT89C51-24AC AT89C51-24JC AT89C51-24PC AT89C51-24QC AT89C51-24AI AT89C51-24JI AT89C51-24PI AT89C51-24QI

Package 44A 44J 40P6 44Q 44A 44J 40P6 44Q 44A 44J 40P6 44Q 44A 44J 40P6 44Q 44A 44J 40P6 44Q 44A 44J 40P6 44Q 44A 44J 40P6 44Q 44A 44J 40P6 44Q
44A 44J 40P6 44Q

Package Type 44-lead, Thin Plastic Gull Wing Quad Flatpack TQFP 44-lead, Plastic J-leaded Chip Carrier PLCC 40-lead, Wide, Plastic Dual Inline Package PDIP 44-lead, Plastic Gull Wing Quad Flatpack PQFP

AT89C51

Operation Range Commercial 0° C to 70° C Industrial
-40° C to 85° C Commercial 0° C to 70° C Industrial
-40° C to 85° C Commercial 0° C to 70° C Industrial
-40° C to 85° C Commercial 0° C to 70° C Industrial
-40° C to 85° C

Packaging Information
44A, 44-lead, Thin mm Plastic Gull Wing Quad Flatpack TQFP Dimensions in Millimeters and Inches *

JEDEC STANDARD MS-026 ACB

PIN 1 ID
44J, 44-lead, Plastic J-leaded Chip Carrier PLCC Dimensions in Inches and Millimeters

JEDEC STANDARD MS-018 AC

X 45° PIN NO. 1 IDENTIFY

X 30° - 45°
.650 16.5 SQ
.685 17.4 SQ

REF SQ

X 45° MAX 3X

Controlling dimension millimeters
40P6, 40-lead, Wide, Plastic Dual Inline Package PDIP Dimensions in Inches and Millimeters

PIN 1

SEATING PLANE
0 REF 15

AT89C51
44Q, 44-lead, Plastic Quad Flat Package PQFP Dimensions in Millimeters and Inches *

JEDEC STANDARD MS-022 AB

PIN 1 ID

Controlling dimension millimeters

Atmel Headquarters

Corporate Headquarters 2325 Orchard Parkway San Jose, CA 95131 TEL 408 441-0311 FAX 408 487-2600

Europe Atmel U.K., Ltd. Coliseum Business Centre Riverside Way Camberley, Surrey GU15 3YL England TEL 44 1276-686-677 FAX 44 1276-686-697

Asia Atmel Asia, Ltd. Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimhatsui East Kowloon Hong Kong TEL 852 2721-9778 FAX 852 2722-1369

Japan Atmel Japan K.K. 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan TEL 81 3-3523-3551 FAX 81 3-3523-7581

Atmel Operations

Atmel Colorado Springs 1150 E. Cheyenne Mtn. Blvd. Colorado Springs, CO 80906 TEL 719 576-3300 FAX 719 540-1759

Atmel Rousset Zone Industrielle 13106 Rousset Cedex France TEL 33 4-4253-6000 FAX 33 4-4253-6001

Fax-on-Demand North America 1- 800 292-8635 International 1- 408 441-0732
More datasheets: DCP54-16-13 | IPC-5120-25CE | IPC-5120-35CE | IPC-7120-35CE | IPC-7120-25CE | IPC-7120-00CE | IPC-5120-00CE | FQA5N90_F109 | SEN0231 | BEAGLEBONE-DVIDCAPE


Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived AT89C51-24PI Datasheet file may be downloaded here without warranties.

Datasheet ID: AT89C51-24PI 519080