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參數(shù)資料
| 型號： | FSTU3257 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Quad 2:1 Multiplexer/Demultiplexer Bus Switch with -2V Undershoot Protection |
| 中文描述： | 四2:1多路復(fù)用器/解復(fù)用器總線開關(guān)與- 2V的下沖保護(hù) |
| 文件頁數(shù)： | 4/7頁 |
| 文件大小： | 89K |
| 代理商： | FSTU3257 |
www.fairchildsemi.com
4
F
AC Electrical Characteristics
Note 7:
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 8)
Note 8:
T
A
=
+
25
°
C, f
=
1 MHz, Capacitance is characterized but not tested.
Undershoot Characteristic
(Note 9)
Note 9:
This is intended to characterize the device
’
s protective capabilities by maintaining output signal integrity during an input transient voltage undershoot
event.
FIGURE 1.
Device Test Conditions
Transient
Input Voltage (V
IN
) Waveform
Symbol
Parameter
T
A
=
40
°
C to
+
85
°
C,
C
L
=
50pF, RU
=
RD
=
500
V
CC
=
4.5 – 5.5V
Min
Max
0.25
7.0
30.0
7.0
30.0
Units
Conditions
Figure
V
CC
=
4.0V
Min
No.
Max
0.25
35.0
35.0
t
PHL
,t
PLH
Prop Delay Bus to Bus (Note 7)
Prop Delay, Select to Bus A
t
PZH
, t
PZL
Output Enable Time, Select to Bus B
ns
V
I
=
OPEN
Figures
2, 3
ns
V
I
=
7V for t
PZL
Figures
2, 3
Output Enable Time, OE to Bus A, B
7.0
30.0
35.0
V
I
=
OPEN for t
PZH
V
I
=
7V for t
PLZ
t
PHZ
, t
PLZ
Output Disable Time, Select to Bus B
1.5
8.4
9.8
ns
Figures
2, 3
Output Disable Time, Output Enable Time, OE to Bus A, B
1.5
8.8
9.8
V
I
=
OPEN for t
PHZ
Symbol
Parameter
Typ
3
Max
Units
pF
Conditions
C
IN
Control Pin Input Capacitance
V
CC
=
5.0V
C
I/O
A Port
B Port
Input/Output Capacitance
7.5
5.5
14
pF
pF
pF
V
CC
, OE
=
5.0V
C
I/O
ON State
Input/Output Capacitance ON State (A or B Port)
V
CC
=
5.0V Switch ON
Symbol
V
OUTU
Parameter
Min
2.5
Typ
Max
Units
V
Conditions
Figure 1
Output Voltage During Undershoot
V
OH
0.3
Parameter
V
IN
R
1
- R
2
V
TRI
V
CC
Value
See Waveform
Units
V
V
V
100K
11.0
5.5
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