9338DMQB 반도체 회로 부품 판매점
8-Bit Multiple Port Register
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 National Semiconductor |
9338 DM9338 8-Bit Multiple Port Register
General Description
The DM9338 is an 8-bit multiple port register designed for
high speed random access memory applications where the
ability to simultaneously read and write is desirable A com-
mon use would be as a register bank in a three address
computer Data can be written into any one of the eight bits
and read from any two of the eight bits simultaneously
Connection Diagrams
Dual-In-Line Package
June 1989
TL F 9794 – 1
Order Number 9338DMQB 9338FMQB or DM9338N
See NS Package Number J16A N16E or W16A
Pin Names
A0 – A2
DA
B0 – B2
C0 – C2
CP
SLE
ZB
ZC
Description
Write Address Inputs
Data Input
B Read Address Inputs
C Read Address Inputs
Clock Pulse Input (Active Rising Edge)
Slave Enable Input (Active LOW)
B Output
C Output
FAST and TRI-STATE are registered trademarks of National Semiconductor Corporation
C1995 National Semiconductor Corporation TL F 9794
RRD-B30M115 Printed in U S A
Absolute Maximum Ratings (Note)
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Supply Voltage
7V
Input Voltage
5 5V
Operating Free Air Temperature Range
Military
b55 C to a125 C
Commercial
0 C to a70 C
Storage Temperature Range
b65 C to a150 C
Note The ‘‘Absolute Maximum Ratings’’ are those values
beyond which the safety of the device cannot be guaran-
teed The device should not be operated at these limits The
parametric values defined in the ‘‘Electrical Characteristics’’
table are not guaranteed at the absolute maximum ratings
The ‘‘Recommended Operating Conditions’’ table will define
the conditions for actual device operation
Recommended Operating Conditions
Symbol
VCC
VIH
VIL
IOH
IOL
TA
ts (H)
ts (L)
th (H)
th (L)
ts (H)
ts (L)
th (H)
th (L)
tw (H)
tw (L)
Parameter
Supply Voltage
High Level Input Voltage
Low Level Input Voltage
High Level Output Current
Low Level Output Current
Free Air Operating Temperature
Setup Time HIGH or LOW
DA to CP
Hold Time HIGH or LOW
DA to CP
Setup Time HIGH or LOW
An to CP
Hold Time HIGH or LOW
An to CP
CP Pulse Width HIGH or LOW
Min
45
2
b55
20
12
0
b8 0
10
10
0
0
23
13
Military
Nom
5
Max
55
08
b0 8
16
125
Commercial
Min Nom Max
4 75 5 5 25
2
08
b0 8
16
0 70
20
12
0
b8 0
10
10
0
0
23
13
Units
V
V
V
mA
mA
C
ns
ns
ns
ns
ns
Electrical Characteristics
Over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
VI
VOH
VOL
II
Input Clamp Voltage
High Level Output Voltage
Low Level Output Voltage
Input Current Max
Input Voltage
VCC e Min II e b12 mA
VCC e Min IOH e Max
VIL e Max
VCC e Min IOL e Max
VIH e Min
VCC e Max VI e 5 5V
IIH
High Level Input Current
VCC e Max VI e 2 4V
IIL
Low Level Input Current
VCC e Max VI e 0 4V
IOS Short Circuit
Output Current
VCC e Max
(Note 2)
MIL
COM
ICC Supply Current
VCC e Max
Note 1 All typicals are at VCC e 5V TA e 25 C
Note 2 Not more than one output should be shorted at a time
Min
24
b10
b10
Typ
(Note 1)
34
02
Max
b1 5
04
1
27
b1 1
b70
b70
135
Units
V
V
V
mA
mA
mA
mA
mA
2
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