Hex/Quad D Flip-Flops with Clear - National Semiconductor
Description
54174 DM54174 DM74174 54175 DM54175 DM74175 Hex Quad D Flip-Flops with Clear
June 1989
54174 DM54174 DM74174 54175 DM54175 DM74175 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) version features complementary outputs from each flip-flop Information at the D inputs meeting the setup and hold time requirements is transferred to the Q outputs on the positivegoing edge of the clock pulse Clock triggering occurs at a particular 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 Y Y Y Y
Y Y Y
174 contains six flip-flops with single-rail outputs 175 contains four flip-flops with double-rail outputs Buffered clock and direct clear inputs Individual data input to each flip-flop Applications include Buffer storage registers Shift registers Pattern generators Typical clock frequency 40 MHz Typical power dissipation per flip-flop 38 mW Alternate Military Aerospace device (54174 54175) is available Contact a National Semiconductor Sales Office Distributor for specifications
Connection Diagrams
Dual-In-Line Package Dual-In-Line Package
TL F 6557 – 1
TL F 6557 – 2
Order Number 54174DMQB 54174FMQB DM54174J DM54174W or DM74174N See NS Package Number J16A N16E or W16A
Order Number 54175DMQB 54175FMQB DM54175J DM54175W or DM74175N See NS Package Number J16A N16E or W16A
Function Table (Each Flip-Flop)
Inputs Clear L H H H Clock X D X H L X Q L H L Q0 Outputs Q H L H Q0
u u
L
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 175 only
C1995 National Semiconductor Corporation TL F 6557 RRD-B30M105 Printed in U S A
Absol...
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