Vaishali Semiconductor VS32X245Q2, VS32X2245Q2 Datasheet
VS32X245 / VS32X2245
A
A1 A
A
A
A
A
A
A
A9 A
A
A
A
A
A
Q
A
A
A4 A
A
A
A
A
A
A
A11A13A
A12A14A
High Speed CMOS VSwitch
16-Bit Bus Switches
Applications
•= 5V to 3.3V translation in mixed-supply environment
•= Hot-swap interface
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 25Ω resistors 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 hotswap applications.
•= Logic replacement
•= Bus isolation
Features
•= Enhanced N-FET with no DC path to VCC
or GND in normal operating signal voltage
range.
•= Low impedance bidirectional data flow:
5Ω (VS32X245) and 25Ω (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 Figure 2. Pin Configuration
0
2
3
5
4
7
6
(All Pins Top View)
SOP
/OE1
14
B7 B0 B1
15
B15B8 B9
/OE2
B2 B4 B5
B3 B6
8
11
10
B11 B14
B10 B12 B13
12
13
NC
GND
NC
10
15
GND
1
2
0
3
1
4
2
5
3
6
5
7
8
6
9
7
10
11
8
12
9
13
14
15
16
17
18
19
20
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
V
CC
/OE1
B0
B1
B2
B3
B4
B5
B6
B7
V
CC
/OE2
B8
B9
B10
B11
B12
B13
B14
B15
2001-04-12 Page 1 MDSS-0013-01
Vaishali Semic onductor 747 Camden Avenue, Suite C Cam pbel l CA 95008 P h. 408.377.6060 Fax 408.377.6063
www.vaishali.com
VS32X245/VS32X2245
Table 1. Pin Description
Name I/O Description
A0 – A15 I/O Bus A – Data Input or Output
/OE1, /OE2 I Output enable
B0 – B15 I/O Bus B – Data Output or Input
Table 2. Function Table
/OE1 /OE2 A0 - A7 A8 – A15 Function
H H Hi - Z Hi - Z Disconnect
L H B0 – B7 Hi - Z Connect
H L Hi - Z B8 – B15 Connect
L L B0 – B7 B8 – B15 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, V
OUT
= 0V
QSOP
Pins Typ Max Unit
Control Inputs 4 5 pF
VSwitch Channels
(Switch OFF)
5
7
pF
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 Semic onductor 747 Camden Avenue, Suite C Cam pbel l CA 95008 P h. 408.377.6060 Fax 408.377.6063
Loading...