74LS74 PDF Datasheet浏览和下载

型号.:
74LS74
PDF下载:
下载PDF文件
内容描述:
小功率肖特基
[LOW POWER SCHOTTKY]
文件大小:
106 K
文件页数:
8 Pages
品牌Logo:
品牌名称:
ONSEMI [ ON SEMICONDUCTOR ]
PCB Prototype
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SN74LS74A
Dual D-Type Positive
Edge-Triggered Flip-Flop
The SN74LS74A dual edge-triggered flip-flop utilizes Schottky
TTL circuitry 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 input D is transferred to the Q output on the
positive-going 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.
http://onsemi.com
LOW
POWER
SCHOTTKY
MODE SELECT – TRUTH TABLE
INPUTS
OPERATING MODE
S
D
Set
Reset (Clear)
*Undetermined
Load “1” (Set)
Load “0” (Reset)
*
L
H
L
H
H
S
D
H
L
L
H
H
D
X
X
X
h
l
Q
H
L
H
H
L
Q
L
H
H
L
H
14
1
OUTPUTS
PLASTIC
N SUFFIX
CASE 646
Both outputs will be HIGH while both S
D
and C
D
are LOW, but the output
states are unpredictable 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
.
14
1
H, h = HIGH Voltage Level
L, I = LOW Voltage Level
X = Don’t Care
l, h (q) = Lower case letters indicate the state of the referenced input
i, h (q) =
(or output) one set-up time prior to the HIGH to LOW clock transition.
SOIC
D SUFFIX
CASE 751A
GUARANTEED OPERATING RANGES
Symbol
V
CC
T
A
I
OH
I
OL
Parameter
Supply Voltage
Operating Ambient
Temperature Range
Output Current – High
Output Current – Low
Min
4.75
0
Typ
5.0
25
Max
5.25
70
– 0.4
8.0
Unit
V
°C
mA
mA
ORDERING INFORMATION
Device
SN74LS74AN
SN74LS74AD
Package
14 Pin DIP
14 Pin
Shipping
2000 Units/Box
2500/Tape & Reel
©
Semiconductor Components Industries, LLC, 1999
1
December, 1999 – Rev. 6
Publication Order Number:
SN74LS74A/D