SN54/74LS322A
8-BIT SHIFT REGISTERS
WITH SIGN EXTEND
These 8-bit shift registers have multiplexed input/output data ports to
accomplish full 8-bit data handling in a single 20-pin package. Serial data may
enter the shift-right register through either D0 or D1 inputs as selected by the
data select pin. A serial output is also provided. Synchronous parallel loading
is achieved by taking the register enable and the S/P inputs low. This places
the three-state input/output ports in the data input mode. Data is entered on
the low-to-high clock transition. The data extend function repeats the sign in
8-BIT SHIFT REGISTERS
WITH SIGN EXTEND
LOW POWER SCHOTTKY
the Q flip-flop during shifting. An overriding clear input clears the internal
A
registers when taken low whether the outputs are enabled or off. The output
enable does not affect synchronous operation of the register.
• Multiplexed Inputs/Outputs Provide Improved Bit Density
• Sign Extend Function
J SUFFIX
CERAMIC
• Direct Overriding Clear
• 3-State Outputs Drive Bus Lines Directly
CASE 732-03
20
1
(TOP VIEW)
DATA
SIGN
N SUFFIX
PLASTIC
CASE 738-03
V
SELECT EXTEND D1
B/Q
D/Q
F/Q
H/Q
Q/
H
CLOCK
11
CC
B
D
F
H
19
DS
18
SE
17
D1
16
15
14
13
12
20
20
1
B/Q
D/Q
F/Q
H/G
Q/
B
D
F
H
H
G
CK
DW SUFFIX
SOIC
CASE 751D-03
S/P
D0
A/Q C/Q
E/Q
G/Q
7
OE
8
CLR
A
C
E
G
20
1
1
2
3
4
5
6
9
10
REGISTER S/P
ENABLE
D0
A/Q
C/Q
E/Q
E
G/Q OUTPUT CLEAR GND
G
A
C
ENABLE
ORDERING INFORMATION
SN54LSXXXJ
Ceramic
SN74LSXXXN Plastic
SN74LSXXXDW SOIC
GUARANTEED OPERATING RANGES
Symbol
Parameter
Min
Typ
Max
Unit
V
CC
Supply Voltage
54
74
4.5
4.75
5.0
5.0
5.5
5.25
V
T
A
Operating Ambient Temperature Range
54
74
–55
0
25
25
125
70
°C
I
I
Output Current — High
Output Current — Low
Q
′
54, 74
–0.4
mA
mA
OH
H
Q
Q
′
′
54
74
4.0
8.0
OL
H
H
I
I
Output Current — High
Output Current — Low
Q –Q
Q –Q
A
54
74
–1.0
–2.6
mA
mA
OH
A
H
H
Q –Q
54
74
12
24
OL
A
H
H
Q –Q
A
FAST AND LS TTL DATA
5-1