SN54/74LS299
8-BIT SHIFT/STORAGE REGISTER
WITH 3-STATE OUTPUTS
The SN54 / 74LS299 is an 8-Bit Universal Shift / Storage Register with
3-state outputs. Four modes of operation are possible: hold (store), shift left,
shift right and load data.
The parallel load inputs and flip-flop outputs are multiplexed to reduce the
total number of package pins. Separate outputs are provided for flip-flops Q0
and Q7 to allow easy cascading. A separate active LOW Master Reset is used
to reset the register.
8-BIT SHIFT/STORAGE REGISTER
WITH 3-STATE OUTPUTS
LOW POWER SCHOTTKY
•
Common I/O for Reduced Pin Count
•
Four Operation Modes: Shift Left, Shift Right, Load and Store
•
Separate Shift Right Serial Input and Shift Left Serial Input for Easy
Cascading
•
3-State Outputs for Bus Oriented Applications
•
Input Clamp Diodes Limit High-Speed Termination Effects
•
ESD > 3500 Volts
20
1
J SUFFIX
CERAMIC
CASE 732-03
20
N SUFFIX
PLASTIC
CASE 738-03
1
CONNECTION DIAGRAM DIP
(TOP VIEW)
V
CC
20
S
1
19
D
s7
18
Q
7
17
I/O
7
16
I/O
5
15
I/O
3
14
I/O
1
13
CP
12
DS
0
11
20
NOTE:
The Flatpak version
has the same pinouts
(Connection Diagram) as
the Dual In-Line Package.
1
DW SUFFIX
SOIC
CASE 751D-03
ORDERING INFORMATION
SN54LSXXXJ
Ceramic
SN74LSXXXN Plastic
SN74LSXXXDW SOIC
1
S
0
2
OE
1
3
OE
2
4
I/O
6
5
I/O
4
6
I/O
2
7
I/O
0
8
Q
0
9
MR
10
GND
PIN NAMES
HIGH
CP
DS0
DS7
I/On
OE1, OE2
Q0, Q7
MR
S0, S1
Clock Pulse (active positive-going edge) Input
Serial Data Input for Right Shift
Serial Data Input for Left Shift
Parallel Data Input or
Parallel Output (3-State) (Note c)
3-State Output Enable (active LOW) Inputs
Serial Outputs (Note b)
Asynchronous Master Reset (active LOW) Input
Mode Select Inputs
LOADING
(Note a)
LOW
0.25 U.L.
0.25 U.L.
0.25 U.L.
0.25 U.L.
15 (7.5) U.L.
0.25 U.L.
5 (2.5) U.L.
0.25 U.L.
0.5 U.L.
0.5 U.L.
0.5 U.L.
0.5 U.L.
0.5 U.L.
65 (25) U.L.
0.5 U.L.
10 U.L.
0.5 U.L.
1 U.L.
NOTES:
a) 1 TTL Unit Load (U.L.) = 40
µA
HIGH/1.6 mA LOW.
b) The Output LOW drive factor is 2.5 U.L for Military (54) and 5 U.L. for Commercial (74) Temperature Ranges.
c) The Output LOW drive factor is 7.5 U.L for Military (54) and 15 U.L. for Commercial (74). The Output HIGH drive factor is 25 U.L. for Military (54) and 65 U.L. for
Commercial (74) Temperature Ranges.
FAST AND LS TTL DATA
5-479
SN54/74LS299
LOGIC DIAGRAM
S
1
19
S
0
1
18
D
S7
DS
0
11
12
CLOCK
D CK
CLR
8
Q
D CK
CLR
Q
D CK
CLR
Q
D CK
CLR
Q
D CK
CLR
Q
D CK
CLR
Q
D CK
CLR
Q
D CK
CLR
Q
17
Q
0
MR
Q
7
9
2
OE
1
OE
2
3
7
13
6
14
5
15
4
16
V
= PIN 20
CC
GND = PIN 10
= PIN NUMBERS
I/O
0
I/O
1
I/O
2
I/O
3
I/O
4
I/O
5
I/O
6
I/O
7
FUNCTION TABLE
INPUTS
MR
L
L
L
L
L
H
H
H
H
H
H
H
H
S1
X
X
H
L
X
L
L
H
H
H
L
L
L
S0
X
X
H
X
L
H
H
L
L
H
L
L
L
OE1
H
X
X
L
L
X
L
X
L
X
H
X
L
OE2
X
H
X
L
L
X
L
X
L
X
X
H
L
X
X
X
CP
X
X
X
X
X
DS0
X
X
X
X
X
D
D
X
X
X
X
X
X
DS7
X
X
X
X
X
X
X
D
D
X
X
X
X
Asynchronous Reset; Q0 = Q7 = LOW
I/O Voltage Undetermined
Asynchronous Reset; Q0 = Q7 = LOW
I/O Voltage LOW
Shift Right; D Q0; Q0 Q1; etc.
Shift Right; D Q0 & I/O0; Q0 O1 & I/O1; etc.
Shift Left; D Q7; Q7 Q6; etc.
Shift Left; D Q7 & I/O7; Q7 Q6 & I/O6; etc.
Parallel Load; I/On Qn
Hold: I/O Voltage undetermined
Hold: I/On = Qn
RESPONSE
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
GUARANTEED OPERATING RANGES
Symbol
VCC
TA
IOH
IOL
IOH
IOL
Supply Voltage
Operating Ambient Temperature Range
Output Current — High
Output Current — Low
Output Current — High
Output Current — Low
Q0, Q7
Q0, Q7
Q0, Q7
I/O0 – I/O7
I/O0 – I/O7
I/O0 – I/O7
I/O0 – I/O7
Parameter
54
74
54
74
54, 74
54
74
54
74
54
74
Min
4.5
4.75
– 55
0
Typ
5.0
5.0
25
25
Max
5.5
5.25
125
70
– 0.4
4.0
8.0
– 1.0
– 2.6
12
24
Unit
V
°C
mA
mA
mA
mA
FAST AND LS TTL DATA
5-480
SN54/74LS299
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE
(unless otherwise specified)
Limits
Symbol
VIH
VIL
VIK
VOH
Parameter
Input HIGH Voltage
54
Input LOW Voltage
74
Input Clamp Diode Voltage
Output HIGH Voltage
I/O0 – I/O7
Output HIGH Voltage
Q0, Q7
Output LOW Voltage
I/O0 – I/O7
Output LOW Voltage
I/O0 – I/O7
Output Off Current HIGH
I/O0 – I/O7
Output Off Current LOW
I/O0 – I/O7
Others
S0, S1,
I/O0 – I/O7
IIH
Input HIGH Current
Others
S0, S1
I/O0 – I/O7
Others
IIL
IOS
Input LOW Current
S0, S1
Short Circuit Current
(Note 1)
Power Supply Current
Q0, Q7
I/O0 – I/O7
– 20
– 30
– 0.8
–100
–130
53
mA
mA
mA
mA
54
74
54
74
54, 74
74
54, 74
74
2.4
2.4
2.5
2.7
– 0.65
3.2
3.1
3.4
3.4
0.25
0.35
0.4
0.5
0.4
0.5
40
– 400
20
40
0.1
0.2
0.1
– 0.4
0.8
– 1.5
V
V
V
V
V
V
V
V
V
µA
µA
µA
µA
mA
mA
mA
mA
VCC = MAX, VIN = 0.4 V
VCC = MAX
VCC = MAX
VCC = MAX
VCC = MAX, VIN = 7.0 V
VCC = MAX, VIN = 5.5 V
VCC = MAX, VIN = 2.7 V
VCC = MIN, IOH = MAX
IOL = 12 mA
IOL = 24 mA
IOL = 4.0 mA
IOL = 8.0 mA
VCC = VCC MIN,
VIN = VIL or VIH
per Truth Table
VCC = VCC MIN,
VIN = VIL or VIH
per Truth Table
VCC = MIN, IOH = MAX
Min
2.0
0.7
V
Typ
Max
Unit
V
Test Conditions
Guaranteed Input HIGH Voltage for
All Inputs
Guaranteed Input LOW Voltage for
All Inputs
VCC = MIN, IIN = – 18 mA
VOH
VOL
VOL
IOZH
IOZL
VCC = MAX, VOUT = 2.7 V
VCC = MAX, VOUT = 0.4 V
ICC
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
FAST AND LS TTL DATA
5-481
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