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M81C55 데이터시트 PDF




OKI에서 제조한 전자 부품 M81C55은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

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기능 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
1/19




M81C55 pdf, 반도체, 판매, 대치품
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¡ Semiconductor
MSM81C55-5RS/GS/JS
AC CHARACTERISTICS
Parameter
VCC = 4.5 V to 5.5 V, VCC = 4.75 V to 5.25 V,
Ta = –40 to +80°C Ta = –40 to +70°C
Symbol 80C85AH 3MHz I/F 80C85AH 5MHz I/F Unit
Remarks
et4U.com
Address/latch Setup Time
Latch/address Holt Time
Latch/read (write) Delay Time
Read/output Delay Time
Address/output Delay Time
Latch Width
Read/data Bus Floating Time
Read (write)/latch Delay Time
Read (write) Width
Data In/write Setup Time
Write/data-in Hold Time
Recovery Time
Write/port Output Delay Time
Port Input/read Setup Time
Read/port Input Hold Time
Strobe/buffer Full Delay Time
Strobe Width
Strobe/buffer Empty Delay Time
Strobe/interrupt-on Delay Time
Read/interrupt-off Delay Time
Port Input/strobe Setup Time
Strobe/port-input Hold Time
Strobe/buffer-empty Delay Time
Write/buffer-full Delay Time
Write/interrupt-off Delay Time
Time Output Delay Time Low
Time Output Delay Time High
Read/data Buse Enable Delay Time
Timer Cycle Time
Timer Input Rise and Fall Times
Timer Input Low Level Time
Timer Input High Level Time
WRITE to TIMER-IN
for writes which start counting
TIMER-IN to WRITE
for writes which start counting
Min. Max.
tAL 50 —
tLA 30 —
tLC 100 —
tRD — 170
tAD — 400
tLL 100 —
tRDF 0 100
tCL 20 —
tCC 250 —
tDW 150 —
tWD 0 —
tRV 300 —
tWP — 400
tPR 70
tRP 50
tSBF DataSheet4U.c40o0m
tSS 200 —
tRBE — 400
tSI — 400
tRDI — 400
tPSS 50 —
tPHS 120
tSBE — 400
tWBF — 400
tWI — 400
tTL — 400
tTH — 400
tRDE 10
tCYC 320 —
tr, tf — 80
t1 80 —
t2 120 —
tWT 200
tTW 0 —
Min.
37
30
40
70
0
20
200
100
25
200
50
10
150
20
100
10
320
40
70
200
0
Max.
— ns
— ns
— ns
140 ns
330 ns
— ns
80 ns
— ns
— ns
— ns
— ns
— ns
300 ns
DataShee
— ns Load capaci-
— ns tance: 150 pF
300 ns
— ns
300 ns
300 ns
300 ns
— ns
— ns
300 ns
300 ns
300 ns
300 ns
300 ns
— ns
— ns
80 ns
— ns
— ns
— ns
— ns
Note: Timings are measured wth VL = 0.8 V and VH = 2.2 V for both input and output.
DataSheet4U.com
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4/19

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M81C55 전자부품, 판매, 대치품
www.DataSheet4U.com
¡ Semiconductor
Basic Input Mode
RD
Port Input
Data Bus
tPR
MSM81C55-5RS/GS/JS
tRP
Basic Output Mode
WR
et4U.com
Data Bus
Port Output
tWP
Note: The DATA BUS timing is the same as the read and write cycles.
DataSheet4U.com
Timer Waveforms 1
Load Counter From
Count Length Register
21
tf
5
TIMER IN
TIMER OUT
(Pulse)
tr
(Note)
TIMER OUT
(Square Wave)
(Note)
Load Counter From
Count Length Register
432
1
t2 (T.C)
t1
tCYC
tTL
5
tTH
tTL tTH
Count Down(5Æ1)
Note: Periodically outut according to the output mode (m1=1) programming contents.
DataShee
DataSheet4U.com
DataSheet4 U .com
DataSheet4U.com
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