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參數資料
| 型號： | FST32245 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Octal Bus Switch with 25з Series Resistor in Outputs (Preliminary) |
| 中文描述： | 八路總線開關25з系列電阻的輸出（初步） |
| 文件頁數： | 3/5頁 |
| 文件大小： | 170K |
| 代理商： | FST32245 |
Preliminary
3
www.fairchildsemi.com
F
AC Electrical Characteristics
Note 6:
This parameter is guaranteed by design but is not tested. The bus switch contributes no propagation delay other than the RC delay of the typical On
Resistance of the switch and the 50pF load capacitance, when driven by an ideal voltage the source (zero output impedance).
Capacitance
(Note 7)
Note 7:
T
A
=
+
25
°
C, f
=
1 MHz, Capacitance is characterized but not tested.
AC Loading and Waveforms
Note:
Input driven by 50
source terminated in 50
Note:
C
L
includes load and stray capacitance
Note:
Input PRR
=
1.0 MHz t
W
=
500 ns
FIGURE 1. AC Test Circuit
FIGURE 2. AC Waveforms
Symbol
Parameter
T
A
=
40
°
C to
+
85
°
C,
C
L
=
50pF, RU
=
RD
=
500
V
CC
=
4.5 – 5.5V
Min
Max
1.25
Units
Conditions
Figure
Number
V
CC
=
4.0V
Min
Max
1.25
t
PHL
, t
PLH
Propagation Delay Bus to Bus
(Note 6)
Output Enable Time
ns
V
I
=
OPEN
Figures
1, 2
Figures
1, 2
t
PZH
, t
PZL
1.0
5.9
6.4
ns
V
I
=
7V for t
PZL
V
I
=
OPEN for t
PZH
V
I
=
7V for t
PLZ
V
I
=
OPEN for t
PHZ
t
PHZ
, t
PLZ
Output Disable Time
1.0
6.0
5.7
ns
Figures
1, 2
Symbol
C
IN
Parameter
Typ
3
Max
Units
pF
Conditions
Control Pin Input Capacitance
V
CC
=
5.0V
C
I/O
Input/Output Capacitance
5
pF
V
CC
, OE
=
5.0V
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