MC74ACT74 Motorola, MC74ACT74 Datasheet

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MC74ACT74

Manufacturer Part Number
MC74ACT74
Description
DUAL D-TYPE POSITIVE EDGE-TRIGGERED FLIP-FLOP
Manufacturer
Motorola
Datasheet

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DataSheet U .com
Dual D Type Positive
Edge Triggered Flip Flop
and Set inputs and complementary (Q,Q) outputs. Information at the input is
transferred to the outputs on the positive edge of the clock pulse. Clock triggering
occurs at a voltage level of the clock pulse and is not directly related to the transition
time of the positive-going pulse. After the Clock Pulse input threshold voltage has
been passed, the Data input is locked out and information present will not be
transferred to the outputs until the next rising edge of the Clock Pulse input.
Asynchronous Inputs:
4
TRUTH TABLE (Each Half)
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Q 0 (Q 0 ) = Previous Q(Q) before
Outputs Source/Sink 24 mA
C D1
S D
= LOW-to-HIGH Clock Transition
ACT74 Has TTL Compatible Inputs
The MC74AC74/74ACT74 is a dual D-type flip-flop with Asynchronous Clear
LOW input to S D (Set) sets Q to HIGH level
LOW input to C D (Clear) sets Q to LOW level
Clear and Set are independent of clock
Simultaneous LOW on C D and S D makes both Q and Q HIGH
V CC
H
H
H
H
L
L
14
1
D 1
CP 1
C D2
D 1
C D
13
LOW-to-HIGH Transition of Clock
C D1
Inputs
S D1
2
H
H
H
H
L
L
Q 1
Q 1
CP 1
D 2
12
CP
3
X
X
X
L
CP 2
S D1
11
4
D
X
X
X
H
X
L
CP 2
D 2
S D2
Q 1
10
5
Q 0
Q
H
H
H
C D2
L
L
S D2
Outputs
Q 2
Q 2
Q 2
Q 1
9
6
Q 0
Q
H
H
H
L
L
GND
Q 2
8
7
PIN NAMES
D 1 , D 2
CP 1 , CP 2
C D1 , C D2
S D1 , S D2
Q 1 , Q 1 , Q 2 , Q 2
FACT DATA
5-1
Data Inputs
Clock Pulse Inputs
Direct Clear Inputs
Direct Set Inputs
Outputs
MC74ACT74
MC74AC74
DUAL D-TYPE POSITIVE
EDGE-TRIGGERED
LOGIC SYMBOL
S D1
S D2
CASE 751A-03
CASE 646-06
Q 1
D 1
D 2
FLIP-FLOP
Q 2
N SUFFIX
D SUFFIX
PLASTIC
PLASTIC
CP 1
CP 2
Q 1
Q 2
C D1
CD 2

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MC74ACT74 Summary of contents

Page 1

... Direct Set Inputs Q 1 GND Outputs FACT DATA 5-1 MC74AC74 MC74ACT74 DUAL D-TYPE POSITIVE EDGE-TRIGGERED FLIP-FLOP N SUFFIX CASE 646-06 PLASTIC D SUFFIX CASE 751A-03 PLASTIC LOGIC SYMBOL ...

Page 2

... V in from 0 2.0 V; see individual Data Sheets for devices that differ from the typical input rise and fall times. 4 DataSheet U .com MC74AC74 MC74ACT74 LOGIC DIAGRAM Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. ...

Page 3

... Propagation Delay t PHL t PHL Voltage Range 3 3.3 V 0.3 V. Voltage Range 5 5 DataSheet U .com MC74AC74 MC74ACT74 74AC Parameter Parameter +25 C (V) (V) Typ 3.0 1 ...

Page 4

... Dynamic Output Current Output Current I OHD I CC Maximum Quiescent Supply Current Supply Current * All outputs loaded; thresholds on input associated with output under test. † Maximum test duration 2.0 ms, one output loaded at a time. 4 DataSheet U .com MC74AC74 MC74ACT74 Parameter Parameter (V) (V) 3.3 5.0 3.3 5.0 3.3 5 ...

Page 5

... Pulse Width Recovery TIme t rec t rec Voltage Range 5 5.0 V 0.5 V. CAPACITANCE Symbol C IN Input Capacitance C PD Power Dissipation Capacitance 4 DataSheet U .com MC74AC74 MC74ACT74 Parameter Parameter (V) (V) Min 5.0 5.0 145 145 5.0 5.0 3.0 3.0 5.0 5.0 3 ...

Page 6

... Motorola, Inc. Motorola, Inc Equal Opportunity/Affirmative Action Employer. How to reach us: USA/EUROPE: Motorola Literature Distribution; P.O. Box 20912; Phoenix, Arizona 85036. 1–800–441–2447 MFAX: RMFAX0@email.sps.mot.com –TOUCHTONE (602) 244–6609 INTERNET: http://Design–NET.com 4 DataSheet U .com MC74AC74 MC74ACT74 OUTLINE DIMENSIONS N SUFFIX PLASTIC DIP PACKAGE CASE 646–06 ISSUE ...

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