Dear customers,
About the change in the name such as "Oki Electric Industry Co. Ltd." and
"OKI" in documents to OKI Semiconductor Co., Ltd.
The semiconductor business of Oki Electric Industry Co., Ltd. was succeeded to OKI
Semiconductor Co., Ltd. on October 1, 2008.
Therefore, please accept that although
the terms and marks of "Oki Electric Industry Co., Ltd.", “Oki Electric”, and "OKI"
remain in the documents, they all have been changed to "OKI Semiconductor Co., Ltd.".
It is a change of the company name, the company trademark, and the logo, etc. , and
NOT a content change in documents.
October 1, 2008
OKI Semiconductor Co., Ltd.
550-1 Higashiasakawa-cho, Hachioji-shi, Tokyo 193-8550, Japan
http://www.okisemi.com/en/
E2E1034 -27-Y4
¡ Semiconductor
MSM82C43
¡ Semiconductor
INPUT/OUTPUT PORT EXPANDER
This version: Jan. 1998
MSM82C43
Previous version: Nov. 1996
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, P
p
, A and ORLDP
p
,
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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¡ Semiconductor
MSM82C43
FUNCTIONAL BLOOK DIAGRAM
ADDRESS
DECODER
LATCH
4
PORT 4
INPUT
BUFFER
INSTRUCTION
DECODER
LATCH
4
PORT 5
PORT 2
4
MUX
TEMP
4
INPUT
BUFFER
LATCH
PROG
CS
CONTROL
AND/OR
LOGIC
INPUT
4
4
PORT 6
BUFFER
RESET
CIRCUIT
LATCH
4
PORT 7
INPUT
BUFFER
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¡ Semiconductor
MSM82C43
PIN CONFIGURATION (TOP VIEW)
MSM82C43RS
P50
P40
P41
P42
P43
CS
PROG
P23
22
1
2
3
4
5
6
7
8
9
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
P21 10
P20 11
GND 12
24-pin Plastic DIP
MSM82C43GS
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
V
CC
P51
P52
P53
P60
P61
P62
P63
P73
P72
P71
P70
24 pin Plastic Small Outline Package
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¡ Semiconductor
MSM82C43
ABSOLUTE MAXIMUM RATINGS
Parameter
Supply Voltage
Input Voltage
Storage Temperature
Symbol
V
CC
V
I
T
STG
Conditions
Ta=25∞C
Ta=25∞C
—
Rating
–0.5 to 7
–0.3 to 7
–65 to +150
Unit
V
V
∞C
RECOMMENDED OPERATING CONDITIONS
Parameter
Supply Voltage
Ambient Temperature
Fan–out
Symbol
V
CC
T
A
N
Conditions
—
—
MOS load
TTL load
Range
2.5 to 6*1
–40 to +85
10
3*2
Unit
V
∞C
—
—
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