TL/F/6609
9334/DM9334 8-Bit Addressable Latch
June 1989
9334/DM9334 8-Bit Addressable Latch
General Description
The DM9334 is a high speed 8-bit Addressable Latch de-
signed for general purpose storage applications in digital
systems. It is a multifunctional device capable of storing sin-
gle line data in eight addressable latches, and being a one-
of-eight decoder and demultiplexer with active level high
outputs. The device also incorporates an active level low
common clear for resetting all latches, as well as an active
level low enable.
The DM9334 has four modes of operation which are shown
in the mode selection table. In the addressable latch mode,
data on the data line (D) is written into the addressed latch.
The addressed latch will follow the data input with all non-
addressed latches remaining in their previous states. In the
memory mode, all latches remain in their previous state and
are unaffected by the data or address inputs.
In the one-of-eight decoding or demultiplexing mode, the
addressed output will follow the state of the D input with all
other inputs in the low state. In the clear mode all outputs
are low and unaffected by the address and data inputs.
When operating the device as an addressable latch, chang-
ing more than one bit of the address could impose a tran-
sient wrong address. Therefore, this should only be done
while in the memory mode.
The function tables summarize the operation of the product.
Features
YCommon clear
YEasily expandable
YRandom (addressable) data entry
YSerial to parallel capability
Y8 bits of storage/output of each bit available
YActive high demultiplexing/decoding capability
YAlternate Military/Aerospace device (9334) is available.
Contact a National Semiconductor Sales Office/Distrib-
utor for specifications.
Connection Diagram
Dual-In-Line Package
TL/F/6609–1
Order Number 9334DMQB, 9334FMQB, DM9334J or DM9334N
See NS Package Number J16A, N16E or W16A
C1995 National Semiconductor Corporation RRD-B30M105/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§Ctoa
125§C
Commercial 0§to a70§C
Storage Temperature Range b65§Ctoa
150§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 Parameter Military Commercial Units
Min Nom Max Min Nom Max
VCC Supply Voltage 4.5 5 5.5 4.75 5 5.25 V
VIH High Level Input Voltage 2 2 V
VIL Low Level Input Voltage 0.8 0.8 V
IOH High Level Output Current b0.8 b0.8 mA
IOL Low Level Output Current 16 16 mA
tWENABLE Pulse Width 19 13 19 13 ns
(Fig. 1) (Note 4)
tSU Setup Time Data 1 (Fig. 4) 20 13 20 13
(Note 4) Data 0 (Fig. 4) 20 14 20 14 ns
Address (Fig. 6) 10 5 10 5
(Note 1)
tHHold Time Data 1 (Fig. 4) 0 b10 0 b10 ns
(Note 4) Data 0 (Fig. 4) 0 b13 0 b13
TAFree Air Operating Temperature b55 125 0 70 §C
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Symbol Parameter Conditions Min Typ Max Units
(Note 2)
VIInput Clamp Voltage VCC eMin, IIeb
12 mA b1.5 V
VOH High Level Output VCC eMin, IOH eMax 2.4 3.6 V
Voltage VIL eMax, VIH eMin
VOL Low Level Output VCC eMin, IOL eMax 0.2 0.4 V
Voltage VIH eMin, VIL eMax
IIInput Current @Max VCC eMax, VIe5.5V 1mA
Input Voltage
IIH High Level Input VCC eMax E Input 60 mA
Current VIe2.4V Others 40
IIL Low Level Input VCC eMax E Input b2.4 mA
Current VIe0.4V Others b1.6
IOS Short Circuit VCC eMax MIL b30 b100 mA
Output Current (Note 3) COM b30 b100
ICC Supply Current VCC eMax 56 86 mA
Note 1: The ADDRESS setup time is the time before the negative ENABLE transition that the ADDRESS must be stable so that the correct latch is addressed
without affecting the other latches.
Note 2: All typicals are at VCC e5V, TAe25§C.
Note 3: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 4: TAe25§C and VCC e5V.
2
Switching Characteristics at VCC e5V and TAe25§C (See Section 1 for Test Waveforms and Output Load)
Symbol Parameter From (Input) RLe400X,C
Le15 pF Units
To (Output) Min Max
tPLH Propagation Delay Time Enable to 28 ns
Low to High Level Output Output, Fig. 1
tPHL Propagation Delay Time Enable to 27 ns
High to Low Level Output Output, Fig. 1
tPLH Propagation Delay Time Data to 35 ns
Low to High Level Output Output, Fig. 2
tPHL Propagation Delay Time Data to 28 ns
High to Low Level Output Output, Fig. 2
tPLH Propagation Delay Time Address to 35 ns
Low to High Level Output Output, Fig. 3
tPHL Propagation Delay Time Address to 35 ns
High to Low Level Output Output, Fig. 3
tPHL Propagation Delay Time Clear to 31 ns
High to Low Level Output Output, Fig. 5
Function Tables
E C Mode
L H Addressable Latch
H H Memory
L L Active High Eight
Channel Demultiplexer
H L Clear
Inputs Present Output States Mode
C E DA0A1A2 Q0 Q1 Q2 Q3 Q4Q5 Q6 Q7
L H X X X X L L L L L L L L Clear
LLL L L L L L L L L L L L
LLHLLL H L L L LL L L
LLL H L L L L L L L L L L
LLHH L L L H L L L L L L
### # # Demultiplex
### # #
### # #
LLHHHH L L L L L L L H
HHXXXXQ
N
b
1Memory
HLLLLL L Q
N
b
1
Q
N
b
1
Q
N
b
1
HLH L L L H Q
N
b
1Q
N
b
1
HLL H L L Q
N
b
1LQ
N
b
1
HLH H L L Q
N
b
1HQ
N
b
1Addressable
### # # Latch
### # #
### # #
HLLHHHQ
N
b
1Q
N
b
1L
HLH H H H Q
N
b
1Q
N
b
1H
X
e
Don’t Care Condition
LeLow Voltage Level
HeHigh Voltage Level
QNb1ePrevious Output State
3
Logic Diagram
9334
TL/F/6609–2
Switching Time Waveforms
TL/F/6609–3
Other Conditions: C eH, A eStable
Figure 1
TL/F/6609–4
Other Conditions: E eL, C eH, A eStable
Figure 2
TL/F/6609–5
Other Conditions: E eL, C eL, D eH
Figure 3
TL/F/6609–6
Other Conditions: C eH, A eStable
Figure 4
TL/F/6609–7
Other Conditons: E eH
Figure 5
TL/F/6609–8
Other Conditions: C eH
Figure 6
Note: The shaded areas indicate when the inputs are permitted to change for predictable output performance.
4
Physical Dimensions inches (millimeters)
16-Lead Ceramic Dual-In-Line Package (J)
Order Number 9334DMQB or DM9334J
NS Package Number J16A
16-Lead Molded Dual-In-Line Package (N)
Order Number DM9334N
NS Package Number N16E
5
9334/DM9334 8-Bit Addressable Latch
Physical Dimensions inches (millimeters) (Continued)
16-Lead Ceramic Flat Package (W)
Order Number 9334FMQB
NS Package Number W16A
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