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M81C55 반도체 회로 부품 판매점

MSM81C55



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M81C55 데이터시트, 핀배열, 회로
www.DataSheet4U.com
www.DataESh2eOet040U1.c4om-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 (portDAataanSdheBe)t4U.com
• 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)
DataShee
FUNCTIONAL BLOCK DIAGRAM
DataSheet4U.com
IO/M
AD0 - 7
CE
ALE
RD
WR
RESET
256 ¥ 8
Static
RAM
Timer
DataSheet4 U .com
TIMER IN
TIMER OUT
Port A
A 8 PA0 - 7
Port B
B 8 PB0 - 7
Port C
C 6 PC0 - 5
VCC (+5 V)
GNDDa(t0aVS)heet4U.com
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M81C55 데이터시트, 핀배열, 회로
www.DataSheet4U.com
¡ Semiconductor
MSM81C55-5RS/GS/JS
PIN CONFIGURATION (TOP VIEW)
et4U.com
TIMEROUT 1
IO/M 2
CE 3
RD 4
WR 5
ALE 6
AD0 7
AD1 8
AD2 9
AD3 10
NC 11
44 pin Plastic QFP
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
DataSheet341UPB.c4 om
30 PB3
29 PB2
28 PB1
27 PB0
26 PA7
25 PA6
24 PA5
23 PA4
44 pin Plastic QFJ
DataShee
DataSheet4U.com
DataSheet4 U .com
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
DataSheet4U.com
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