SN54LS299 Datasheet, PDF (1/7 Pages) Motorola, Inc – 8-BIT SHIFT/STORAGE REGISTER WITH 3-STATE OUTPUTS

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.
• 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
CONNECTION DIAGRAM DIP (TOP VIEW)
VCC S1
20
19
Ds7
18
Q7 I/O7 I/O5 I/O3 I/O1 CP DS0
17
16
15
14
13
12
11
NOTE:
The Flatpak version
has the same pinouts
(Connection Diagram) as
the Dual In-Line Package.
1
S0
2
3
4
5
6
7
8
OE1 OE2 I/O6 I/O4 I/O2 I/O0 Q0
9
10
MR GND
SN54/74LS299
8-BIT SHIFT/STORAGE REGISTER
WITH 3-STATE OUTPUTS
LOW POWER SCHOTTKY
20
1
20
1
20
1
J SUFFIX
CERAMIC
CASE 732-03
N SUFFIX
PLASTIC
CASE 738-03
DW SUFFIX
SOIC
CASE 751D-03
ORDERING INFORMATION
SN54LSXXXJ Ceramic
SN74LSXXXN Plastic
SN74LSXXXDW SOIC
PIN NAMES
LOADING (Note a)
HIGH
LOW
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
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.
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.
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