參數(shù)資料
型號: 74HCU
廠商: NXP Semiconductors N.V.
英文描述: HCMOS family characteristics
中文描述: HCMOS家庭特征
文件頁數(shù): 12/19頁
文件大?。?/td> 88K
代理商: 74HCU
March 1988
12
Philips Semiconductors
HCMOS family characteristics
FAMILY SPECIFICATIONS
Test circuit for 74HC
HCT TYPES
AC waveforms 74HCT
handbook, full pagewidth
MGK563
D.U.T
VCC
VCC
VI
VO
RT
RL = 1 k
CL
50 pF
PULSE
GENERATOR
Switch position
Note
1.
For open-drain N-channel outputs t
PLZ
and t
PZL
are applicable.
TEST
SWITCH
t
PZH
t
PZL
t
PHZ
t
PLZ
GND
V
CC
GND
V
CC
Fig.7 Test circuit for 3-state outputs.
C
L
=
load capacitance including jig and probe capacitance
(see AC CHARACTERISTICS for values).
R
T
=
termination resistance should be equal to the output impedance Z
o
of
the pulse generator.
Fig.8 Input rise and fall times, transition times and propagation delays for combinatorial logic ICs.
handbook, halfpage
MGK567
10%
90%
90%
1.3 V
1.3 V
10%
INPUT
OUTPUT
tr
tf
tPHL
tTHL
tPLH
tTLH
GND
3 V
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