參數(shù)資料
型號: 74F455
廠商: NXP Semiconductors N.V.
英文描述: Buffers/drivers
中文描述: 緩沖器/驅(qū)動器
文件頁數(shù): 8/12頁
文件大?。?/td> 104K
代理商: 74F455
Philips Semiconductors
Product specification
74F455,* 74F456
Buffers/Drivers
1999 Jan 08
8
* Discontinued part. Please see the Discontinued Products List.
AC WAVEFORMS
For all waveforms, V
M
= 1.5V.
SF00965
V
M
V
M
V
M
V
M
t
PHL
t
PLH
Dn
E, O, Qn
Waveform 1. Propagation Delay, Non-Inverting Outputs
SF00966
V
M
V
M
V
M
V
M
t
PHL
t
PLH
Dn
E, O, Qn
Waveform 2. Propagation Delay, Inverting Outputs
V
M
V
M
V
M
t
PHZ
t
PZH
V
OH
-0.3V
0V
OEn
SF00967
E, O, Qn, Qn
Waveform 3. 3-State Output Enable Time to High Level and
Output Disable Time from High Level
V
M
V
M
V
M
t
PLZ
t
PZL
V
OL
+0.3V
OEn
SF00968
E, O, Qn, Qn
Waveform 4. 3-State Output Enable Time to Low Level and
Output Disable Time from Low Level
TEST CIRCUIT AND WAVEFORMS
t
w
90%
V
M
10%
90%
V
M
10%
90%
V
M
10%
90%
V
M
10%
NEGATIVE
PULSE
POSITIVE
PULSE
t
w
AMP (V)
0V
0V
t
THL (
t
f
)
INPUT PULSE REQUIREMENTS
rep. rate
t
w
t
TLH
t
THL
1MHz
500ns
2.5ns
2.5ns
Input Pulse Definition
V
CC
family
74F
D.U.T.
PULSE
GENERATOR
R
L
C
L
R
T
V
IN
V
OUT
Test Circuit for 3-State Outputs
DEFINITIONS:
R
L
=
Load resistor;
see AC electrical characteristics for value.
Load capacitance includes jig and probe capacitance;
see AC electrical characteristics for value.
Termination resistance should be equal to Z
OUT
of
pulse generators.
C
L
=
R
T
=
t
THL (
t
f
)
t
TLH (
t
r
)
t
TLH (
t
r
)
AMP (V)
amplitude
3.0V
1.5V
V
M
R
L
7.0V
SF00777
TEST
t
PLZ
t
PZL
All other
SWITCH
closed
closed
open
SWITCH POSITION
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