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DM54194 Datasheet

4-Bit Bidirectional Universal Shift Registers

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DM54194 pdf
June 1989
DM54194
4-Bit Bidirectional Universal Shift Registers
General Description
This bidirectional shift register is designed to incorporate
virtually all of the features a system designer may want in a
shift register it features parallel inputs parallel outputs
right-shift and left-shift serial inputs operating-mode-control
inputs and a direct overriding clear line The register has
four distinct modes of operation namely
Parallel (broadside) load
Shift right (in the direction QA toward QD)
Shift left (in the direction QD toward QA)
Inhibit clock (do nothing)
Synchronous parallel loading is accomplished by applying
the four bits of data and taking both mode control inputs S0
and S1 high The data is loaded into the associated flip-
flops and appears at the outputs after the positive transition
of the clock input During loading serial data flow is inhibit-
ed
Shift right is accomplished synchronously with the rising
edge of the clock pulse when S0 is high and S1 is low
Serial data for this mode is entered at the shift-right data
input When S0 is low and S1 is high data shifts left syn-
chronously and new data is entered at the shift-left serial
input
Clocking of the flip-flop is inhibited when both mode control
inputs are low The mode controls of the DM54194
DM74194 should be changed only while the clock input is
high
Features
Y Parallel inputs and outputs
Y Four operating modes
Synchronous parallel load
Right shift
Left shift
Do nothing
Y Positive edge-triggered clocking
Y Direct overriding clear
Y Typical clock frequency 36 MHz
Y Typical power dissipation 195 mW
Connection Diagram
Dual-In-Line Package
Order Number DM54194J or DM54194W
See NS Package Number J16A or W16A
TL F 6564 – 1
C1995 National Semiconductor Corporation TL F 6564
RRD-B30M105 Printed in U S A


National Semiconductor Electronic Components Datasheet

DM54194 Datasheet

4-Bit Bidirectional Universal Shift Registers

No Preview Available !

DM54194 pdf
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
DM54
b55 C to a125 C
Storage Temperature Range
b65 C to a150 C
Recommended Operating Conditions
Symbol
Parameter
VCC Supply Voltage
VIH High Level Input Voltage
VIL Low Level Input Voltage
IOH High Level Output Current
IOL Low Level Output Current
fCLK
Clock Frequency (Note 4)
tW
Pulse Width (Note 4)
Clock
Clear
tSU
Setup Time (Note 4)
Mode
Data
tH Hold Time (Note 4)
tREL
Clear Release Time (Note 4)
TA Free Air Operating Temperature
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
Min
45
2
0
20
20
30
20
0
25
b55
DM54194
Nom
5
36
Max
55
08
b0 8
16
25
125
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
Typ
Min (Note 1) Max Units
VI Input Clamp Voltage
VOH
High Level Output
Voltage
VOL Low Level Output
Voltage
II Input Current Max
Input Voltage
VCC e Min II e b12 mA
VCC e Min IOH e Max
VIL e Max VIH e Min
VCC e Min IOL e Max
VIH e Min VIL e Max
VCC e Max VI e 5 5V
24
b1 5
V
34 V
02 04 V
1 mA
IIH
High Level Input Current
VCC e Max VI e 2 4V
40 mA
IIL
Low Level Input Current
VCC e Max VI e 0 4V
b1 6
mA
IOS
Short Circuit Output Current
VCC e Max (Note 2)
b20
b57
mA
ICC Supply Current
VCC e Max (Note 3)
39 63 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
Note 3 With all outputs open inputs A through D grounded and 4 5V applied to S0 S1 CLEAR and the serial inputs ICC is tested with a momentary ground then
4 5V applied to CLOCK
Note 4 TA e 25 C and VCC e 5V
2


Part Number DM54194
Description 4-Bit Bidirectional Universal Shift Registers
Maker National Semiconductor
Total Page 6 Pages
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