SN54LS194A Datasheet, PDF (1/6 Pages) Motorola, Inc – 4-BIT BIDIRECTIONAL UNIVERSAL SHIFT REGISTER

4-BIT BIDIRECTIONAL
UNIVERSAL SHIFT REGISTER
The SN54 / 74LS194A is a High Speed 4-Bit Bidirectional Universal Shift
Register. As a high speed multifunctional sequential building block, it is useful
in a wide variety of applications. It may be used in serial-serial, shift left, shift
right, serial-parallel, parallel-serial, and parallel-parallel data register trans-
fers. The LS194A is similar in operation to the LS195A Universal Shift
Register, with added features of shift left without external connections and
hold (do nothing) modes of operation. It utilizes the Schottky diode clamped
process to achieve high speeds and is fully compatible with all Motorola TTL
families.
• Typical Shift Frequency of 36 MHz
• Asynchronous Master Reset
• Hold (Do Nothing) Mode
• Fully Synchronous Serial or Parallel Data Transfers
• Input Clamp Diodes Limit High Speed Termination Effects
CONNECTION DIAGRAM DIP (TOP VIEW)
VCC Q0 Q1 Q2 Q3 CP S1 S0
16 15 14 13 12 11 10 9
1
2
34
56
78
MR DSR P0 P1 P2 P3 DSL GND
PIN NAMES
LOADING (Note a)
HIGH
LOW
S0, S1
P0 – P3
DSR
DSL
CP
MR
Q0 – Q3
Mode Control Inputs
Parallel Data Inputs
Serial (Shift Right) Data Input
Serial (Shift Left) Data Input
Clock (Active HIGH Going Edge) Input
Master Reset (Active LOW) Input
Parallel Outputs (Note b)
0.5 U.L.
0.5 U.L.
0.5 U.L.
0.5 U.L.
0.5 U.L.
0.5 U.L.
10 U.L.
0.25 U.L.
0.25 U.L.
0.25 U.L.
0.25 U.L.
0.25 U.L.
0.25 U.L.
5 (2.5) 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)
b. Temperature Ranges.
SN54/74LS194A
4-BIT BIDIRECTIONAL
UNIVERSAL SHIFT REGISTER
LOW POWER SCHOTTKY
16
1
J SUFFIX
CERAMIC
CASE 620-09
16
1
N SUFFIX
PLASTIC
CASE 648-08
16
1
D SUFFIX
SOIC
CASE 751B-03
ORDERING INFORMATION
SN54LSXXXJ
SN74LSXXXN
SN74LSXXXD
Ceramic
Plastic
SOIC
FAST AND LS TTL DATA
5-360