VS32X245 Datasheet, PDF (1/6 Pages) Vaishali Semiconductor – High Speed CMOS VSwitch 16-Bit Bus Switches

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 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 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:
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
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 ₁
A0 ²
A1 3
A2 4
A3 5
A4 6
A5 7
A6 8
A7 9
GND 10
NC 11
A8 12
A9 13
A10 14
A11 15
A12 16
A13 17
A14 18
A15 19
GND 20
40 VCC
39 /OE1
38 B0
37 B1
36 B2
35 ^B3
34 B4
33 B5
32 B6
31 B7
30 V_CC
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 [phone]