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Vaishali Semiconductor
Vaishali Semiconductor

VS32244Q Datasheet Preview

VS32244Q Datasheet

High Speed CMOS VSwitch Dual 4-Bit Bus Switches

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VS32244Q pdf
VS3244 / VS32244
High Speed CMOS VSwitch
Dual 4-Bit Bus Switches
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 25resistors 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.
Features
= Enhanced N-FET with no DC path to VCC
or GND in normal operating signal voltage
range.
= Low impedance bidirectional data flow:
5(VS3244) and 25(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
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
2B2
2B3
2B4
/1G
1A1
2B4
1A2
2B3
1A3
2B2
1A4
2B1
GND
1
2
3
4
5
6
7
8
9
10
20 VCC
19 /2G
18 1B1
17 2A4
16 1B2
15 2A3
14 1B3
13 2A2
12 1B4
11 2A1
A0
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



Vaishali Semiconductor
Vaishali Semiconductor

VS32244Q Datasheet Preview

VS32244Q Datasheet

High Speed CMOS VSwitch Dual 4-Bit Bus Switches

No Preview Available !

VS32244Q pdf
VS3244/VS32244
Table 1. Pin Description
Name
1A1 – 1A4
2A1 – 2A4
/1G, /2G
1B1 – 1B4
2B1 – 2B4
I/O
I/O
I
I/O
Description
Data Input or Output
Enable Input
Data Output or Input
Table 2. Function Table ( Each 4-bit bus switch)
Input
/nG
Path
Function
H
Hi Impedance
Disable all switches
L
Switch Closed
A port = B port
Table 3. Absolute Maximum Ratings
Supply Voltage to Ground………………………….…..-0.5V to +7.0V
DC Switch Voltage VS……………………….………….-0.5V to +7.0V
DC Input Voltage VIN………………………………… ...-0.5V to +7.0V
AC Input Voltage (Pulse Width < 20ns)……………….…………-3.0V
DC Output Sink Current per Switch Pin…………………...…..120 mA
Maximum Power Dissipation…………………………….…..0.5 Watts
Storage Temperature………………………………...-65oC to +150oC
ABSOLUTE MAXIMUM CONTINUOUS RATINGS are those values beyond which damage to the device may occur.
Exposure to these conditions or conditions beyond those indicated may adversely affect device reliability.
Correct functional operation while operating in the absolute maximum rated conditions is not implied.
Table 4. Capacitance
TA = 25oC, f = 1 MHz, VIN = 0V, VOUT = 0V
QSOP
Pins
Typ Max
Unit
Control Inputs
45
VSwitch Channels 5 7
pF
pF
(Switch OFF)
Note Capacitance is guaranteed, but not production tested. Total capacitance of a path, when the switch is closed, is
the sum of the switch terminal capacitances.
2001-04-12
Page 2
MDSS-0008-02
www.vaishali.com
Vaishali Semiconductor 747 Camden Avenue, Suite C Campbell CA 95008 Ph. 408.377.6060 Fax 408.377.6063


Part Number VS32244Q
Description High Speed CMOS VSwitch Dual 4-Bit Bus Switches
Maker Vaishali Semiconductor
Total Page 6 Pages
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