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Vaishali Semiconductor
Vaishali Semiconductor

VS32X245 Datasheet Preview

VS32X245 Datasheet

High Speed CMOS VSwitch 16-Bit Bus Switches

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VS32X245 pdf
VS32X245 / VS32X2245
High Speed CMOS VSwitch
16-Bit Bus Switches
Applications
= 5V to 3.3V translation in mixed-supply environment
= Hot-swap interface
= Logic replacement
= Bus isolation
General Description
The VS32X245 and VS32X2245 are high-speed TTL-compatible 16-bit bus switches in a flow-through pinout.
Each device contains two banks of 8-bit switches with a common active-LOW enable (/OEx) for each bank.
The low ON resistance of the VS32X245 allows inputs to be connected to outputs, without adding
propagation delay and without generating additional signal noise. The VS32X2245 has 25resistors in series
with the switches to reduce ground-bounce noise from the driving source and signal reflection.
The VS32X245 and VS32X2245 bus switches are function and pinout compatible with QS32X245 and
QS32X2245 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 these switches 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(VS32X245) and 25(VS32X2245)
= Pin-compatible with QS32X245 and
QS32X2245 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 in 150-mil wide 40 pin QSOP
package
Figure 1. Functional Block Diagram
A0 A1 A2 A3 A4 A5 A6 A7
Figure 2. Pin Configuration
QSOP
(All Pins Top View)
/OE1
B0 B1 B2 B3 B4 B5 B6 B7
A8 A9 A10 A11 A12 A13 A14 A15
/OE2
B8 B9 B10 B11 B12 B13 B14 B15
NC
A0
A1
A2
A3
A4
A5
A6
A7
GND
NC
A8
A9
A10
A11
A12
A13
A14
A15
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40 VCC
39 /OE1
38 B0
37 B1
36 B2
35 B3
34 B4
33 B5
32 B6
31 B7
30 VCC
29 /OE2
28 B8
27 B9
26 B10
25 B11
24 B12
23 B13
22 B14
21 B15
2001-04-12
Page 1
MDSS-0013-01
www.vaishali.com
Vaishali Semiconductor 747 Camden Avenue, Suite C Campbell CA 95008 Ph. 408.377.6060 Fax 408.377.6063



Vaishali Semiconductor
Vaishali Semiconductor

VS32X245 Datasheet Preview

VS32X245 Datasheet

High Speed CMOS VSwitch 16-Bit Bus Switches

No Preview Available !

VS32X245 pdf
VS32X245/VS32X2245
Table 1. Pin Description
Name
A0 – A15
/OE1, /OE2
B0 – B15
I/O
I/O
I
I/O
Description
Bus A – Data Input or Output
Output enable
Bus B – Data Output or Input
Table 2. Function Table
/OE1
H
/OE2
H
A0 - A7
Hi - Z
LH
B0 – B7
HL
Hi - Z
LL
B0 – B7
A8 – A15
Hi - Z
Hi - Z
B8 – B15
B8 – B15
Function
Disconnect
Connect
Connect
Connect
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…………………………….…..0.92 Watts
Storage Temperature………………………………...-65oC to +150oC
Note 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-0013-01
www. vaishali.com
Vaishali Semiconductor 747 Camden Avenue, Suite C Campbell CA 95008 Ph. 408.377.6060 Fax 408.377.6063


Part Number VS32X245
Description High Speed CMOS VSwitch 16-Bit Bus Switches
Maker Vaishali Semiconductor
Total Page 6 Pages
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