54LS174 Datasheet, PDF (1/8 Pages) National Semiconductor (TI) – Hex/Quad D Flip-Flops with Clear

June 1989
54LS174 DM54LS174 DM74LS174
54LS175 DM54LS175 DM74LS175
Hex Quad D Flip-Flops with Clear
General Description
These positive-edge-triggered flip-flops utilize TTL circuitry
to implement D-type flip-flop logic All have a direct clear
input and the quad (175) versions feature complementary
outputs from each flip-flop
Information at the D inputs meeting the setup time require-
ments is transferred to the Q outputs on the positive-going
edge of the clock pulse Clock triggering occurs at a particu-
lar voltage level and is not directly related to the transition
time of the positive-going pulse When the clock input is at
either the high or low level the D input signal has no effect
at the output
Features
Y _{LS174 contains six flip-flops with single-rail outputs}
Y _{LS175 contains four flip-flops with double-rail outputs}
Y _{Buffered clock and direct clear inputs}
Y _{Individual data input to each flip-flop}
Y _{Applications include}
Buffer storage registers
Shift registers
Pattern generators
Y _{Typical clock frequency 40 MHz}
Y _{Typical power dissipation per flip-flop 14 mW}
Y _{Alternate Military Aerospace device (54LS174}
54LS175) is available Contact a National Semiconduc-
tor Sales Office Distributor for specifications
Connection Diagrams
Dual-In-Line Package
Dual-In-Line Package
TL F 6404 – 1
Order Number 54LS174DMQB 54LS174FMQB
54LS174LMQB DM54LS174J
DM54LS174W DM74LS174M or DM74LS174N
See NS Package Number E20A J16A
M16A N16E or W16A
TL F 6404 – 2
Order Number 54LS175DMQB 54LS175FMQB
54LS175LMQB DM54LS175J
DM54LS175W DM74LS175M or DM74LS175N
See NS Package Number E20A J16A
M16A N16E or W16A
Function Table (Each Flip-Flop)
Inputs
Clear
Clock
D
L
X
X
H
u
H
H
u
L
H
L
X
Outputs
Q
Q
L
H
H
L
L
H
Q₀
Q₀
H e High Level (steady state)
L e Low Level (steady state)
X e Don’t Care
u e Transition from low to high level
Q₀ e The level of Q before the indicated steady-state input conditions were
established
e LS175 only
C1995 National Semiconductor Corporation TL F 6404
RRD-B30M105 Printed in U S A