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81C55 PDF даташит

Спецификация 81C55 изготовлена ​​​​«OKI electronic componets» и имеет функцию, называемую «2048-Bit CMOS STATIC RAM WITH I/O PORTS AND TIMER».

Детали детали

Номер произв 81C55
Описание 2048-Bit CMOS STATIC RAM WITH I/O PORTS AND TIMER
Производители OKI electronic componets
логотип OKI electronic componets логотип 

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81C55 Даташит, Описание, Даташиты
E2O0014-27-X2
¡ Semiconductor¡ Semiconductor
MThSiMs v8e1rCsi5o5n-:5JRaSn/. G19S9/8JS
Previous version: Aug. 1996
MSM81C55-5RS/GS/JS
2048-Bit CMOS STATIC RAM WITH I/O PORTS AND TIMER
GENERAL DESCRIPTION
The MSM81C55-5 has a 2k-bit static RAM (256 bytes) with parallel I/O ports and a timer. It uses
silicon gate CMOS technology and consumes a standby current of 100 micro ampere, maximum,
while the chip is not selected. Featureing a maximum access time of 400 ns, the MSM81C55-5
can be used in an MSM80C85AH system without using wait states. The parallel I/O consists
of two 8-bit ports and one 6-bit port (both general purpose).
The MSM81C55-5 also contains a 14-bit programmable counter/timer which may be used for
sequence-wave generation or terminal count-pulsing.
FEATURES
• High speed and low power achieved with silicon gate CMOS technology
• 256 words x 8bits RAM
• Single power supply, 3 to 6 V
• Completely static operation
• On-chip address latch
• 8-bit programmable I/O ports (port A and B)
• TTL Compatible
• RAM data hold characteristic at 2 V
• 6-bit programmable I/O port (port C)
• 14-bit programmable binary counter/timer
• Multiplexed address/data bus
• Direct interface with MSM80C85AH
• 40-pin Plastic DIP (DIP40-P-600-2.54): (Product name: MSM81C55-5RS)
• 44-pin Plastic QFJ (QFJ44-P-S650-1.27): (Product name: MSM81C55-5JS)
• 44-pin Plastic QFP (QFP44-P-910-0.80-2K): (Product name: MSM81C55-5GS-2K)
FUNCTIONAL BLOCK DIAGRAM
IO/M
AD0 - 7
CE
ALE
RD
WR
RESET
256 ¥ 8
Static
RAM
Timer
Port A
A 8 PA0 - 7
Port B
B 8 PB0 - 7
Port C
C 6 PC0 - 5
TIMER IN
TIMER OUT
VCC (+5 V)
GND (0 V)
1/19









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81C55 Даташит, Описание, Даташиты
¡ Semiconductor
PIN CONFIGURATION (TOP VIEW)
44 pin Plastic QFP
TIMEROUT 1
IO/M 2
CE 3
RD 4
WR 5
ALE 6
AD0 7
AD1 8
AD2 9
AD3 10
NC 11
MSM81C55-5RS/GS/JS
40 pin Plastic DIP
PC3
PC4
TIMER IN
1
2
3
RESET 4
PC5 5
TIMER OUT 6
IO/M 7
CE 8
RD 9
WR 10
ALE 11
AD0 12
AD1 13
AD2 14
AD3 15
AD4 16
AD5 17
AD6 18
AD7 19
GND 20
40 VCC
39 PC2
38 PC1
37 PC0
36 PB7
35 PB6
34 PB5
33 PB4
32 PB3
31 PB2
30 PB1
29 PB0
28 PA7
27 PA6
26 PA5
25 PA4
24 PA3
23 PA2
22 PA1
21 PA0
33 PB6
32 PB5
31 PB4
30 PB3
29 PB2
28 PB1
27 PB0
26 PA7
25 PA6
24 PA5
23 PA4
44 pin Plastic QFJ
TIMER OUT 7
IO/M 8
CE 9
RD 10
WR 11
NC 12
ALE 13
AD0 14
AD1 15
AD2 16
AD3 17
39 PB6
38 PB5
37 PB4
36 PB3
35 PB2
34 NC
33 PB1
32 PB0
31 PA7
30 PA6
29 PA5
2/19









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81C55 Даташит, Описание, Даташиты
¡ Semiconductor
MSM81C55-5RS/GS/JS
ABSOLUTE MAXIMUM RATING
Parameter
Power Supply Voltage
Input Voltage
Output Voltage
Storage Temperature
Power Dissipation
Symbol
VCC
VIN
VOUT
TSTG
PD
Conditions
Referenced
to GND
Ta = 25°C
Rating
MSM81C55-5RS MSM81C55-5GS MSM81C55-5JS
–0.5 to +7
–0.5 to VCC +0.5
–0.5 to VCC +0.5
–55 to +150
1.0 0.7
1.0
Unit
V
V
V
°C
W
OPERATING CONDITION
Parameter
Power Supply Voltage
Operating Temperature
Symbol
VCC
TOP
Range
3 to 6
–40 to +85
RECOMMENDED OPERATING CONDITIONS
Parameter
Power Supply Voltage (81C55)
Operating Temperature (81C55)
"L" Level Input
"H" Level Input
Supply Voltage (81C55-5)
Operating Temperature (81C55-5)
Symbol
VCC
TOP
VIL
VIH
VCC
VOP
Min.
4.5
–40
–0.3
2.2
4.75
–40
Typ.
5
+25
5
+25
Max.
5.5
+85
+0.8
VCC +0.3
5.25
+70
Unit
V
°C
Unit
V
°C
V
V
V
°C
DC CHARACTERISTICS
Parameter
Symbol
"L" Level Output Voltage VOL
"H" Level Output Voltage VOH
Input Leak Current
Output Leak Current
ILI
ILO
Standby Current
ICCS
Mean Operating
Current
ICC
Condition
IOL = 2 mA
IOH = –400 mA
IOH = –40 mA
0 £ VIN £ VCC
0 £ VOUT £ VCC
VCC = 4.5 V to 5.5 V
Ta = –40°C to 85°C
CE VCC –0.2 V
VIH VCC –0.2 V
VIL £ –0.2 V
Memory cycle
time: 1 ms
Min.
2.4
4.2
–10
–10
Typ. Max. Unit
— 0.45 V
—— V
—— V
— 10 mA
— 10 mA
0.1 100 mA
— 5 mA
3/19










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