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VS3345 Datasheet(Arkusz danych) 5 Page - Vaishali Semiconductor

Numer części VS3345
Szczegółowy opis  High Speed CMOS VSwitch 8-Bit Bus Switches with Active High & Low Enables
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Producent  VAISH [Vaishali Semiconductor]
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VS3345/VS32345
2001-04-12
Page 5
MDSS-0010-01
www.vaishali.com
Vaishali Semiconductor
747 Camden Avenue, Suite C
Campbell
CA 95008
Ph. 408.377.6060
Fax 408.377.6063
Table 8. Switching Characteristics Over Operating Range
TA = -40
oC to +85oC, V
CC = 5.0V + 10
%
CLOAD = 50pF, RLOAD = 500
Ω unless otherwise stated.
Symbol
Description
(1)
VS3245
Min
(3)
Max
VS32245
Min
(3)
Max
Units
tPLH, tPHL
Data Propagation Delay
(2,3) through the switch
0.25
1.25
ns
tPZH, tPZL
Switch Turn-on Delay: /OE, OE to An, Bn
0.5
5.6
0.5
6.6
ns
tPLZ, tPHZ
Switch Turn-off Delay: /OE, OE to An, Bn
0.5
4.5
0.5
4.5
ns
Notes:
1.
See test circuits and waveforms.
2.
This parameter is the calculated theoretical RC time constant of ON-state resistance of the switch and the specified load
capacitance when driven by an ideal voltage source (zero source impedance). This time-constant is on the order of 0.25 ns for
VS3345 and 1.25 ns for VS32345. Since this time-constant is much smaller than rise/fall times of typical driving signals, it adds
very little propagation delay to the system.
3.
This parameter is guaranteed, but not production tested.
Figure 6. AC Test Circuit and Switching Waveforms
AC Test Circuit
Load Switch Position
TEST
S1
tPLH, tPHL
Open
tPLZ, tPZL
Closed
tPHZ, tPZH
Open
Input Conditions
Input voltage = 0 V to 3.0 V
tr = tf = 2.5ns (10% to 90%)
Pulse
Generator
DUT
V
IN
V
OUT
C
L
500
RL
S1
7 V
50
Ω=Coax to
Oscilloscope
50
450




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