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National Semiconductor Electronic Components Datasheet

DM54LS164 Datasheet

8-Bit Serial In/Parallel Out Shift Registers

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June 1989
54LS164 DM54LS164 DM74LS164
8-Bit Serial In Parallel Out Shift Registers
General Description
These 8-bit shift registers feature gated serial inputs and an
asynchronous clear A low logic level at either input inhibits
entry of the new data and resets the first flip-flop to the low
level at the next clock pulse thus providing complete con-
trol over incoming data A high logic level on either input
enables the other input which will then determine the state
of the first flip-flop Data at the serial inputs may be changed
while the clock is high or low but only information meeting
the setup and hold time requirements will be entered Clock-
ing occurs on the low-to-high level transition of the clock
input All inputs are diode-clamped to minimize transmis-
sion-line effects
Features
Y Gated (enable disable) serial inputs
Y Fully buffered clock and serial inputs
Y Asynchronous clear
Y Typical clock frequency 36 MHz
Y Typical power dissipation 80 mW
Y Alternate Military Aerospace device (54LS164) is avail-
able Contact a National Semiconductor Sales Office
Distributor for specifications
Connection Diagram
Function Table
Dual-In-Line Package
Inputs
Outputs
Clear Clock A B QA QB
QH
L
X XX L
L
H L X X QA0 QB0
uH H H H QAn
uH L X L QAn
uH X L L QAn
L
QH0
QGn
QGn
QGn
H e High Level (steady state) L e Low Level (steady state)
X e Don’t Care (any input including transitions)
u e Transition from low to high level
QA0 QB0 QH0 e The level of QA QB or QH respectively before the
indicated steady-state input conditions were established
uQAn QGn e The level of QA or QG before the most recent transition of
the clock indicates a one-bit shift
TL F 6398 – 1
Order Number 54LS164DMQB 54LS164FMQB
54LS164LMQB DM54LS164J DM54LS164W
DM74LS164M or DM74LS164N
See NS Package Number E20A
J14A M14A N14A or W14B
Logic Diagram
C1995 National Semiconductor Corporation TL F 6398
TL F 6398 – 2
RRD-B30M105 Printed in U S A


National Semiconductor Electronic Components Datasheet

DM54LS164 Datasheet

8-Bit Serial In/Parallel Out Shift Registers

No Preview Available !

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
7V
Operating Free Air Temperature Range
DM54LS and 54LS
b55 C to a125 C
DM74LS
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’’ tables will de-
fine the conditions for actual device operation
Recommended Operating Conditions
Symbol
VCC
VIH
VIL
IOH
IOL
fCLK
tW
tSU
tH
tREL
TA
Parameter
Supply Voltage
High Level Input Voltage
Low Level Input Voltage
High Level Output Current
Low Level Output Current
Clock Frequency (Note 4)
Pulse Width
(Note 4)
Clock
Clear
Data Setup Time (Note 4)
Data Hold Time (Note 4)
Clear Release Time (Note 4)
Free Air Operating Temperature
DM54LS164
Min Nom Max
45 5 55
2
07
b0 4
4
0 25
20
20
17
5
30
b55
125
DM74LS164
Min Nom Max
4 75 5
5 25
2
08
b0 4
8
0 25
20
20
17
5
30
0 70
Units
V
V
V
mA
mA
MHz
ns
ns
ns
ns
C
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Min
Typ
(Note 1)
Max
Units
VI
VOH
VOL
Input Clamp Voltage
High Level Output
Voltage
Low Level Output
Voltage
VCC e Min II e b18 mA
VCC e Min IOH e Max
VIL e Max VIH e Min
VCC e Min IOL e Max
VIL e Max VIH e Min
DM54
DM74
DM54
DM74
25
27
b1 5
V
34 V
34
0 25 0 4
0 35 0 5 V
IOL e 4 mA VCC e Min
DM74
II
Input Current Max
VCC e Max VI e 7V
Input Voltage
0 25 0 4
0 1 mA
IIH
High Level Input Current
VCC e Max VI e 2 7V
IIL
Low Level Input Current
VCC e Max VI e 0 4V
IOS Short Circuit
Output Current
VCC e Max
(Note 2)
DM54
DM74
b20
b20
20
b0 4
b100
b100
mA
mA
mA
ICC Supply Current
VCC e Max (Note 3)
16 27 mA
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 and the duration should not exceed one second
Note 3 ICC is measured with all outputs open the SERIAL input grounded the CLOCK input at 2 4V and a momentary ground then 4 5V applied to the CLEAR
input
Note 4 TA e 25 C and VCC e 5V
2


Part Number DM54LS164
Description 8-Bit Serial In/Parallel Out Shift Registers
Maker National Semiconductor
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DM54LS164 Datasheet PDF






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