SN54LS74J Motorola, SN54LS74J Datasheet
SN54LS74J
Manufacturer Part Number
SN54LS74J
Description
DUAL D-TYPE POSITIVE EDGE-TRIGGERED FLIP-FLOP
Manufacturer
Motorola
Datasheet
1.SN54LS74J.pdf
(3 pages)
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DUAL D-TYPE POSITIVE
EDGE-TRIGGERED FLIP-FLOP
cuitry to produce high speed D-type flip-flops. Each flip-flop has individual
clear and set inputs, and also complementary Q and Q outputs.
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. When the clock input is at either the HIGH or the LOW level, the D input
signal has no effect.
* Both outputs will be HIGH while both S D and C D are LOW, but the output states are unpredictable
H, h = HIGH Voltage Level
L, I = LOW Voltage Level
X = Don’t Care
i, h (q) = Lower case letters indicate the state of the referenced input (or output) one set-up time
i, h (q) =
if S D and C D go HIGH simultaneously. If the levels at the set and clear are near V IL maximum then
we cannot guarantee to meet the minimum level for V OH .
Set
Reset (Clear)
*Undetermined
Load “1” (Set)
Load “0” (Reset)
The SN54 / 74LS74A dual edge-triggered flip-flop utilizes Schottky TTL cir-
Information at input D is transferred to the Q output on the positive-going
CLEAR (CD)
SET (S D )
OPERATING MODE
OPERATING MODE
CLOCK
prior to the HIGH to LOW clock transition.
D
4 (10)
1 (13)
3 (11)
2 (12)
LOGIC DIAGRAM (Each Flip-Flop)
MODE SELECT — TRUTH TABLE
S D
H
H
H
L
L
INPUTS
S D
H
H
H
L
L
FAST AND LS TTL DATA
D
X
X
X
h
l
5-72
Q
H
H
H
L
L
OUTPUTS
5 (9)
6 (8)
Q
Q
Q
H
H
H
L
L
EDGE-TRIGGERED FLIP-FLOP
3
2
14
14
SN54/74LS74A
DUAL D-TYPE POSITIVE
14
ORDERING INFORMATION
LOW POWER SCHOTTKY
1
1
D
CP
SN54LSXXJ
SN74LSXXN
SN74LSXXD
S D
C D
4
1
1
LOGIC SYMBOL
Q
Q
V CC = PIN 14
GND = PIN 7
5
6
12
11
Ceramic
Plastic
SOIC
CASE 751A-02
CASE 632-08
CASE 646-06
CERAMIC
N SUFFIX
D SUFFIX
J SUFFIX
PLASTIC
D
CP
SOIC
10
S D
C D
13
Q
Q
9
8
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SN54LS74J Summary of contents
Page 1
DUAL D-TYPE POSITIVE EDGE-TRIGGERED FLIP-FLOP The SN54 / 74LS74A dual edge-triggered flip-flop utilizes Schottky TTL cir- cuitry to produce high speed D-type flip-flops. Each flip-flop has individual clear and set inputs, and also complementary Q and Q outputs. Information at ...
Page 2
GUARANTEED OPERATING RANGES Symbol Parameter V CC Supply Voltage T A Operating Ambient Temperature Range I OH Output Current — High I OL Output Current — Low DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE Symbol Symbol Parameter Parameter V IH Input ...
Page 3
SN54/74LS74A AC WAVEFORMS 1 h(L) t s(L) t W(H) 1 MAX t PHL Q 1 PLH 1 *The shaded areas indicate when the input is permitted to change for ...