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VS3244 Datasheet, PDF (1/6 Pages) Vaishali Semiconductor – High Speed CMOS VSwitch Dual 4-Bit Bus Switches | |||
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VS3244 / VS32244
High Speed CMOS VSwitch
Dual 4-Bit Bus Switches
Applications
â¢= 5V to 3.3V translation in mixed-supply environment
â¢= Hot-swap interface
â¢= Logic replacement
â¢= Bus isolation
General Description
The VS3244 and VS32244 are high-speed TTLâcompatible 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⦠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 âdisableâ mode makes VS3244 and VS32244 ideal interface elements for hot-swap
applications.
Features
â¢= Enhanced N-FET with no DC path to VCC
or GND in normal operating signal voltage
range.
â¢= Low impedance bidirectional data flow:
5⦠(VS3244) and 25⦠(VS32244)
â¢= Pin-compatible with QS3244 and CBT3244
switches.
â¢= Near-zero propagation delay
â¢= Zero added ground bounce or signal noise
â¢= TTL-compatible control signals
â¢= Undershoot clamp diodes on all switch and
control pins
â¢= ESD rating >2000V (Human Body Model)
or >200V (Machine Model)
â¢= Latch-up current >100mA
â¢= Available- Available in 150-mil wide QSOP
package
Figure 1. Functional Block Diagram
/1G
1A1
1A2
1A3
1A4
/2G
1B1
2A1
1B2
2A2
1B3
2A3
1B4
2A4
Figure 2. Pin Configuration
(All Pins Top View)
QSOP
2B1
/1G 1
1A1 2
2B4 3
20 VCC
19 /2G
18 1B1
2B2
1A2 4
17 2A4
A0
2B3
2B4
2B3 5
1A3 6
2B2 7
16 1B2
15 2A3
14 1B3
1A4 8
13 2A2
2B1 9
12 1B4
GND 10
11 2A1
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
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