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參數(shù)資料
| 型號： | 74F245SJX |
| 元件分類： | 通用總線功能 |
| 英文描述： | Single 8-bit Bus Transceiver |
| 中文描述： | 單8位總線收發(fā)器 |
| 文件頁數(shù)： | 8/12頁 |
| 文件大小： | 147K |
| 代理商： | 74F245SJX |
Philips Semiconductors
Product specification
74F240/74F240A/
74F241/74F241A
Buffers
8
V
M
V
M
V
M
t
PHZ
t
PZH
V
OH
-0.3V
0V
Yn, Yn
OEn
OEb
SF00330
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
SF00331
3.5V
OEn
OEb
Yn, Yn
Waveform 4. 3-state output enable time to low level and output
disable time from low level
V
M
V
M
t
sk(0)
Yn,
Yn
Yn,
Yn
SF00332
Waveform 5. Output skew
Notes to AC waveforms
1. For all waveforms, V
M
= 1.5V.
2. The shaded areas indicate when the input is permitted to change
for predictable output performance.
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 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
3.0V
1.5V
V
M
R
L
7.0V
SF00128
TEST
t
PLZ
t
PZL
All other
SWITCH
closed
closed
open
SWITCH POSITION
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| 74F251 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:8-Input Multiplexer with 3-STATE Outputs |
| 74F251A | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:8-Input Multiplexer with 3-STATE Outputs |
| 74F251A_00 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:8-Input Multiplexer with 3-STATE Outputs |
| 74F251A_WHH3026B WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| 74F251AD | 制造商:Texas Instruments 功能描述: |
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