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AT89C51-20QI

Description
8-BIT, FLASH, 24 MHz, MICROCONTROLLER, PDIP40
CategoryThe embedded processor and controller    Microcontrollers and processors   
File Size132KB,17 Pages
ManufacturerAtmel (Microchip)
Download Datasheet Parametric View All

AT89C51-20QI Overview

8-BIT, FLASH, 24 MHz, MICROCONTROLLER, PDIP40

AT89C51-20QI Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerAtmel (Microchip)
Parts packaging codeQFP
package instructionQFP, QFP44,.5SQ,32
Contacts44
Reach Compliance Codeunknow
Has ADCNO
Address bus width16
bit size8
CPU series8051
maximum clock frequency24 MHz
DAC channelNO
DMA channelNO
External data bus width8
JESD-30 codeS-PQFP-G44
JESD-609 codee0
length10 mm
Number of I/O lines32
Number of terminals44
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
PWM channelNO
Package body materialPLASTIC/EPOXY
encapsulated codeQFP
Encapsulate equivalent codeQFP44,.5SQ,32
Package shapeSQUARE
Package formFLATPACK
Peak Reflow Temperature (Celsius)NOT SPECIFIED
power supply5 V
Certification statusNot Qualified
RAM (bytes)128
rom(word)4096
ROM programmabilityFLASH
Maximum seat height2.45 mm
speed20 MHz
Maximum supply voltage6 V
Minimum supply voltage4 V
Nominal supply voltage5 V
surface mountYES
technologyCMOS
Temperature levelINDUSTRIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch0.8 mm
Terminal locationQUAD
Maximum time at peak reflow temperatureNOT SPECIFIED
width10 mm
uPs/uCs/peripheral integrated circuit typeMICROCONTROLLER
Features
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
Description
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 conven-
tional 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.
8-bit
Microcontroller
with 4K Bytes
Flash
AT89C51
Not Recommended
for New Designs.
Use AT89S51.
Pin Configurations
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
RST
(RXD) P3.0
(TXD) P3.1
(INT0) P3.2
(INT1) P3.3
(T0) P3.4
(T1) P3.5
(WR) P3.6
(RD) P3.7
XTAL2
XTAL1
GND
PDIP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
VCC
P0.0 (AD0)
P0.1 (AD1)
P0.2 (AD2)
P0.3 (AD3)
P0.4 (AD4)
P0.5 (AD5)
P0.6 (AD6)
P0.7 (AD7)
EA/VPP
ALE/PROG
PSEN
P2.7 (A15)
P2.6 (A14)
P2.5 (A13)
P2.4 (A12)
P2.3 (A11)
P2.2 (A10)
P2.1 (A9)
P2.0 (A8)
PQFP/TQFP
P1.4
P1.3
P1.2
P1.1 (T2 EX)
P1.0 (T2)
NC
VCC
P0.0 (AD0)
P0.1 (AD1)
P0.2 (AD2)
P0.3 (AD3)
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
12
13
14
15
16
17
18
19
20
21
22
P1.5
P1.6
P1.7
RST
(RXD) P3.0
NC
(TXD) P3.1
(INT0) P3.2
(INT1) P3.3
(T0) P3.4
(T1) P3.5
1
2
3
4
5
6
7
8
9
10
11
PO.4 (AD4)
P0.5 (AD5)
P0.6 (AD6)
P0.7 (AD7)
EA/VPP
NC
ALE/PROG
PSEN
P2.7 (A15)
P2.6 (A14)
P2.5 (A13)
PLCC
P1.4
P1.3
P1.2
P1.1
P1.0
NC
VCC
P0.0 (AD0)
P0.1 (AD1)
P0.2 (AD2)
P0.3 (AD3)
(WR)P3.6
(RD) P3.7
XTAL2
XTAL1
GND
NC
(A8) P2.0
(A9) P2.1
(A10) P2.2
(A11) P2.3
(A12) P2.4
18
19
20
21
22
23
24
25
26
27
28
P1.5
P1.6
P1.7
RST
(RXD) P3.0
NC
(TXD) P3.1
(INT0) P3.2
(INT1) P3.3
(T0) P3.4
(T1) P3.5
7
8
9
10
11
12
13
14
15
16
17
6
5
4
3
2
1
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
PO.4 (AD4)
P0.5 (AD5)
P0.6 (AD6)
P0.7 (AD7)
EA/VPP
NC
ALE/PROG
PSEN
P2.7 (A15)
P2.6 (A14)
P2.5 (A13)
(WR)P3.6
(RD) P3.7
XTAL2
XTAL1
GND
GND
(A8) P2.0
(A9) P2.1
(A10) P2.2
(A11) P2.3
(A12) P2.4
Rev. 0265G–02/00
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