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74ACT74 반도체 회로 부품 판매점

DUAL D-TYPE FLIP FLOP WITH PRESET AND CLEAR



STMicroelectronics 로고
STMicroelectronics
74ACT74 데이터시트, 핀배열, 회로
www.DataSheet4U.com
74ACT74
DUAL D-TYPE FLIP FLOP WITH PRESET AND CLEAR
s HIGH SPEED:
fMAX = 250MHz (TYP.) at VCC = 5V
s LOW POWER DISSIPATION:
ICC = 4µA(MAX.) at TA=25°C
s COMPATIBLE WITH TTL OUTPUTS
VIH = 2V (MIN.), VIL = 0.8V (MAX.)
s 50TRANSMISSION LINE DRIVING
CAPABILITY
s SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 24mA (MIN)
s BALANCED PROPAGATION DELAYS:
tPLH tPHL
s OPERATING VOLTAGE RANGE:
VCC (OPR) = 4.5V to 5.5V
s PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 74
s IMPROVED LATCH-UP IMMUNITY
DESCRIPTION
The 74ACT74 is an advanced high-speed CMOS
DUAL D-TYPE FLIP FLOP WITH PRESET AND
CLEAR fabricated with sub-micron silicon gate
and double-layer metal wiring C2MOS tecnology.
A signal on the D INPUT is transferred to the Q
and Q OUTPUTS during the positive going
transition of the clock pulse.
DIP
SOP
TSSOP
ORDER CODES
PACKAGE
DIP
SOP
TSSOP
TUBE
74ACT74B
74ACT74M
T&R
74ACT74MTR
74ACT74TTR
CLEAR and PRESET are independent of the
clock and accomplished by a low setting on the
appropriate input.
The device is designed to interface directly High
Speed CMOS systems with TTL, NMOS and
CMOS output voltage levels.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
PIN CONNECTION AND IEC LOGIC SYMBOLS
April 2001
1/12


74ACT74 데이터시트, 핀배열, 회로
74ACT74
INPUT AND OUTPUT EQUIVALENT CIRCUIT
TRUTH TABLE
CLR
L
H
L
H
H
H
X : Don’t Care
INPUTS
PR D
HX
LX
LX
HL
HH
HX
LOGIC DIAGRAM
CK
X
X
X
PIN DESCRIPTION
PIN No
1, 13
2, 12
3, 11
4, 10
5, 9
6, 8
7
14
SYMBOL NAME AND FUNCTION
1CLR, 2CLR
Asyncronous Reset -
Direct Input
1D, 2D Data Inputs
1CK, 2CK Clock Input
(LOW to HIGH, Edge
Triggered)
1PR, 2PR Asyncronous Set - Direct
Input
1Q, 2Q True Flip-Flop Outputs
1Q, 2Q Complement Flip-Flop
Outputs
GND Ground (0V)
VCC Positive Supply Voltage
OUTPUTS
QQ
LL
HL
HH
LH
HL
Qn Qn
FUNCTION
CLEAR
PRESET
NO CHANGE
This logic diagram has not be used to estimate propagation delays
2/12




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