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VS3244 Datasheet(PDF) 1 Page - Vaishali Semiconductor

Part No. VS3244
Description  High Speed CMOS VSwitch Dual 4-Bit Bus Switches
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Maker  VAISH [Vaishali Semiconductor]
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VS3244 Datasheet(HTML) 1 Page - Vaishali Semiconductor

   
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2001-04-12
Page 1
MDSS-0008-02
www.vishali.com
Vaishali Semiconductor
747 Camden Avenue, Suite C
Campbell
CA 95008
Ph. 408.377.6060
Fax 408.377.6063
Applications
•= 5V to 3.3V translation in mixed-supply environment
•= Hot-swap interface
•= Logic replacement
•= Bus isolation
General Description
The VS3244 and VS32244 are high-speed TTL–compatible dual 4-bit bus switches. The VS3244 contains
two banks of 4-bit switches, with one common active low enable (/G) per bank. The low ON resistance of the
VS3244 allows inputs to be connected to outputs, without adding propagation delay and without generating
additional signal noise. The VS32244 has 25
Ω resistors in series with the switches to reduce ground-bounce
noise and signal reflection.
The VS3244 and VS32244 bus switches are function and pinout compatible with QS3244 and CBT3244
switches. They enable 5V to 3.3V translation when used with a diode in the power supply line. In addition,
the high off-isolation in the ‘disable’ mode makes VS3244 and VS32244 ideal interface elements for hot-swap
applications.
Figure 1. Functional Block Diagram
Figure 2. Pin Configuration
(All Pins Top View)
VS3244 / VS32244
High Speed CMOS VSwitch
Dual 4-Bit Bus Switches
Features
•= Enhanced N-FET with no DC path to VCC
or GND in normal operating signal voltage
range.
•= Low impedance bidirectional data flow:
5
Ω (VS3244) and 25Ω (VS32244)
•= Pin-compatible with QS3244 and CBT3244
switches.
•= Near-zero propagation delay
•= Zero added ground bounce or signal noise
•= TTL-compatible control signals
•= Undershoot clamp diodes on all switch and
control pins
•= ESD rating >2000V (Human Body Model)
or >200V (Machine Model)
•= Latch-up current >100mA
•= Available- Available in 150-mil wide QSOP
package
QSOP
A0
2A3
2A4
1B4
1B1
1B2
/1G
1B3
1A1
1A2
1A3
1B4
1A4
2B1
2B2
/2G
2B3
2A1
2A2
2A3
2B4
2A4
GND
VCC
1
2
3
4
8
5
6
7
9
10
20
19
18
17
16
15
14
13
12
11
/2G
1B1
1B2
1B3
2A2
2A1
/1G
1A1
2B4
2B3
1A2
1A3
2B2
1A4
2B1


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