74AC74B PDF даташит
Спецификация 74AC74B изготовлена «STMicroelectronics» и имеет функцию, называемую «DUAL D-TYPE FLIP FLOP WITH PRESET AND CLEAR». |
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Детали детали
Номер произв | 74AC74B |
Описание | DUAL D-TYPE FLIP FLOP WITH PRESET AND CLEAR |
Производители | STMicroelectronics |
логотип |
11 Pages
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74AC74
DUAL D-TYPE FLIP FLOP WITH PRESET AND CLEAR
s HIGH SPEED:
fMAX = 300 MHz (TYP.) at VCC = 5V
s LOW POWER DISSIPATION:
ICC = 4 µA (MAX.) at TA = 25 oC
s HIGH NOISE IMMUNITY:
VNIH = VNIL = 28% VCC (MIN.)
BM
s 50Ω TRANSMISSION LINE DRIVING
(Plastic Package)
(Micro Package)
CAPABILITY
s SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 24 mA (MIN)
ORDER CODES :
74AC74B
74AC74M
s BALANCED PROPAGATION DELAYS:
A signal on the D INPUT is transferred to the Q
tPLH ≅ tPHL
OUTPUT during the positive going transition of
s OPERATING VOLTAGE RANGE:
the clock pulse.
VCC (OPR) = 2V to 6V
s PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 74
s IMPROVED LATCH-UP IMMUNITY
CLEAR and PRESET are independent of the
clock and accomplished by a low setting on the
appropriate input.
It is ideal for low power applications mantaining
DESCRIPTION
The AC74 is an
advanced
high-speed
high speed operation similar to equivalent Bipolar
CMwOwwS.DataSheet4SU.ccohm ottky TTL.
OCTAL D-TYPE FLIP FLOP WITH PRESET AND All inputs and outputs are equipped with
CLEAR NON INVERTING fabricated with protection circuits against static discharge, giving
sub-micron silicon gate and double-layer metal them 2KV ESD immunity and transient excess
wiring C2MOS technology.
voltage.
PIN CONNECTION AND IEC LOGIC SYMBOLS
April 1997
1/11
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74AC74
INPUT AND OUTPUT EQUIVALENT CIRCUIT
TRUTH TABLE
CLR
L
H
L
H
H
H
X: Don’t Care
INPUTS
PR
H
L
L
H
H
H
D
X
X
X
L
H
X
LOGIC DIAGRAMS
CK
X
X
X
PIN DESCRIPTION
PIN No
1, 13
2, 12
3, 11
4, 10
5, 9
6, 8
7
14
SYMBOL
1CLR,
2CLR
1D, 2D
1CK, 2CK
1PR, 2PR
1Q, 2Q
1Q, 2Q
GND
VCC
NAME AND FUNCTION
Asyncronous Reset -
Direct Input
Data Inputs
Clock Input
(LOW-to-HIGH, Edge-
Triggered)
Asyncronous Set - Direct
Input
True Flip-Flop Outputs
Complement Flip-Flop
Outputs
Ground (0V)
Positive Supply Voltage
OUT PUT S
QQ
LH
HL
HH
LH
HL
Qn Qn
F UNCT IO N
CLEAR
PRESET
NO CHANGE
This logic diagram has not be used to estimate propagation delays
2/11
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74AC74
ABSOLUTE MAXIMUM RATINGS
Sy mb o l
Parameter
Value
Unit
VCC Supply Voltage
-0.5 to +7
V
VI DC Input Voltage
-0.5 to VCC + 0.5
V
VO DC Output Voltage
-0.5 to VCC + 0.5
V
IIK DC Input Diode Current
± 20 mA
IOK DC Output Diode Current
± 20 mA
IO DC Output Current
± 50 mA
ICC or IGND DC VCC or Ground Current
± 200
mA
Tstg Storage Temperature
-65 to +150
oC
TL Lead Temperature (10 sec)
300 oC
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.
RECOMMENDED OPERATING CONDITIONS
Sy mb o l
Parameter
VCC Supply Voltage
VI Input Voltage
VO Output Voltage
Top Operating Temperature:
dt/dv Input Rise and Fall Time VCC = 3.0, 4.5 or 5.5 V(note 1)
1) VIN from 30% to 70% of VCC
Value
2 to 6
0 to VCC
0 to VCC
-40 to +85
8
Un it
V
V
V
oC
ns/V
3/11
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Номер в каталоге | Описание | Производители |
74AC74 | DUAL D-TYPE FLIP FLOP WITH PRESET AND CLEAR | STMicroelectronics |
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74AC74 | DUAL D-TYPE POSITIVE EDGE-TRIGGERED FLIP-FLOP | ON Semiconductor |
74AC74 | Dual D-Type Positive Edge-Triggered Flip-Flop | Fairchild Semiconductor |
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DataSheet26.com | 2020 | Контакты | Поиск |