OKI MSM82C43GS-K, MSM82C43RS Datasheet
E2E1034 -27-Y4
¡ Semiconductor MSM82C43
¡ Semiconductor
This version: Jan. 1998
Previous version: Nov. 1996
MSM82C43
INPUT/OUTPUT PORT EXPANDER
GENERAL DESCRIPTION
The MSM82C43 is an input/output port expander device based on CMOS technology and
designed to operate at low power consumption levels.
In systems employing the MSM80C48/49 8–bit single chip microcomputers, 4–bit data can be
expanded by dividing between four I/O lines by executing the MOVDA, Pp, A and ORLDPp,
A instructions.
FEATURES
• CMOS technology for low power consumption
• 2.5 to 6 V single power supply (dependent on MSM80C48/49 operating frequency.)
• Fully static operation
• Bidirectional I/O ports
• TTL coimpatible (ports 4 thru 7)
• Functional compatiblity with Intel i8243
• Package options
24 pin Plastic DIP (DIP24–P–600-2.54) : (Product name : MSM82C43RS)
24 pin Plastic SOP (SOP24–P–430–1.27-K) : (Product name : MSM82C43GS-K)
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FUNCTIONAL BLOOK DIAGRAM
PORT 2
PROG
CS
4
MUX
CONTROL
ADDRESS
DECODER
INSTRUCTION
DECODER
TEMP
AND/OR
LOGIC
LATCH
PORT 4
4
INPUT
BUFFER
LATCH
PORT 5
4
INPUT
BUFFER
4
LATCH
PORT 6
4
INPUT
4
BUFFER
RESET
CIRCUIT
LATCH
INPUT
BUFFER
PORT 7
4
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PIN CONFIGURATION (TOP VIEW)
MSM82C43RS
P50
P40
P41
P42
P43
CS
PROG
P23
22
P21
P20
GND
1
2
3
4
5
6
7
8
9
10
11
12
24-pin Plastic DIP
MSM82C43GS
24
23
22
21
20
19
18
17
16
15
14
13
V
CC
P51
P52
P53
P60
P61
P62
P63
P73
P72
P71
P70
P50
P40
P41
P42
P43
CS
PROG
P23
22
P21
P20
GND
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
24 pin Plastic Small Outline Package
V
CC
P51
P52
P53
P60
P61
P62
P63
P73
P72
P71
P70
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¡ Semiconductor MSM82C43
ABSOLUTE MAXIMUM RATINGS
Parameter Symbol Conditions Rating Unit
Supply Voltage
Input Voltage
Storage Temperature
V
CC
V
I
T
STG
Ta=25∞C
Ta=25∞C
—
–0.5 to 7
–0.3 to 7
–65 to +150
V
V
∞C
RECOMMENDED OPERATING CONDITIONS
Parameter Symbol Conditions Range Unit
Supply Voltage
Ambient Temperature
Fan–out
V
CC
T
A
N
—
—
MOS load
2.5 to 6*1
–40 to +85
10
V
∞C
—
TTL load 3*2 —
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