參數(shù)資料
型號(hào): 74ALS38
廠商: NXP Semiconductors N.V.
英文描述: Quad 2-Input NAND buffer open collector
中文描述: 四2輸入與非緩沖集電極開路
文件頁數(shù): 4/7頁
文件大?。?/td> 85K
代理商: 74ALS38
Philips Semiconductors
Product specification
74ALS38A
Quad 2-input NAND buffer (open collector)
1991 Feb 08
4
AC ELECTRICAL CHARACTERISTICS
LIMITS
SYMBOL
PARAMETER
TEST CONDITION
T
amb
= 0
°
C to +70
°
C
V
= +5.0V
±
10%
C
L
= 50pF, R
L
= 500
UNIT
MIN
MAX
t
PLH
t
PHL
Propagation delay
nA or nB to nY
Waveform 1
3.0
3.0
11.0
11.0
ns
AC WAVEFORMS
For all waveforms, V
M
= 1.3V.
V
M
V
M
V
M
V
M
t
PLH
t
PHL
nA, nB
nY
SC00004
Waveform 1.
Propagation Delay for Data to Output
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)
0.3V
0.3V
t
THL (
t
f
f
)
INPUT PULSE REQUIREMENTS
Rep.Rate
t
w
t
TLH
2.0ns
t
THL
2.0ns
1MHz
500ns
Input Pulse Definition
V
CC
Family
74ALS
D.U.T.
PULSE
GENERATOR
R
L
C
L
R
T
V
IN
V
OUT
Test Circuit for Open Collector 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
3.5V
1.3V
V
M
SC00036
R
L
7.0V
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