STTL double-J-K flip-flop
54S112/74S112 STTL J-K (、 ) : f =125MHz Pd=75mW
PRE
K × × × L L H H ×
CLR
CLK
× × × ↓ ↓ ↓ ↓ H
J × × ...
Description
54S112/74S112 STTL J-K (、 ) : f =125MHz Pd=75mW
PRE
K × × × L L H H ×
CLR
CLK
× × × ↓ ↓ ↓ ↓ H
J × × × L H L H ×
H= L=
Q
H L H* QO H L QO
Q
×= ↓=
L H L H H H H H
H L L H H H H H
L H H*
Q0
QO=
Q
Q0 =
L H
Q * , ,。
Q0
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54S112/74S112 STTL J-K (、 )
Vcc VIH VIL IOH IOL fCK tW tsu th TA
74Ⅱ 4.75 5 5.25 2.0 0.8 -1000 20 0 80 6 6.5 8 3↓ 3↓ 0↓ -40 85
54 4.5 5 5.5 V 2.0 V 0.8 V -1000 μA 20 mA 0 80 MHz 6 ns 6.5 8 3↓ ns 3↓ 0↓ ns -55 125 ℃
: (,)
74Ⅱ 54 -1.2 -1.2 V 2.7 0.5 1 50 100 100 100 -1.6 -7 -7 -4 -100 50 2.5 3.4 0.5 1 50 100 100 100 -1.6 -7 -7 -4 -100 50
VIK VOH VOL II
()
Vcc= Vcc= VIH=2V Vcc= VIH=2V
II=-18mA VIL= IOH= VIL= IOL=
V V mA
Vcc= VI=5.5V
IIH
IIL IOS ICC
J、K CLR Vcc= VI=2.7V PRE CLK J、K ※ Vcc= CLR ※ VI=0.5V PRE CLK Vcc= VO=0V Vcc= ( 1)
μA
mA mA mA
-40
-40 30
1: Icc ,, Q Q 。, 。 : CLR IIL ; PRE IIL ; Vcc=5.0V, TA=25℃。
※
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54S112/74S112 STTL J-K (、 ) ():Vcc=5.0V, TA=25℃
() () 80 125 4 5 5
fmax tPLH PRE CLR
PRE CLR ()
MHz
Q Q
CL=15pF
7
7 7 7 7
ns ns ns
tPHL
PRE CLR () CLK
Q Q RL=280Ω
tPLH tPHL
Q Q
4 5
ns ns
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...
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