VS3245 Datasheet, PDF (1/6 Pages) Vaishali Semiconductor – High Speed CMOS VSwitch 8-Bit Bus Switches

VS3245 / VS32245
High Speed CMOS VSwitch
8-Bit Bus Switches
Applications
•= 5V to 3.3V translation in mixed-supply environment
•= Hot-swap interface
•= Logic replacement
•= Bus isolation
General Description
The VS3245 and VS32245 are high-speed TTL–compatible 8-bit bus switches. The VS3245 contains eight
high-speed bus switches, with a common active low enable (/OE). The low ON resistance of the VS3245
allows inputs to be connected to outputs, without adding propagation delay and without generating additional
signal noise. The VS32245 has 25Ω resistors in series with the switches to reduce ground-bounce noise and
signal reflection.
The VS3245 and VS32245 bus switches are function and pinout compatible with QS3245 and CBT3245
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 VS3245 and VS32245 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 (VS3245) and 25Ω (VS32245)
•= Pin-compatible with QS3245 and CBT3245
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 QSOP package
Figure 1. Functional Block Diagram
Figure 2. Pin Configuration
(All Pins Top View)
A0 A1 A2 A3 A4 A5 A6 A7
QSOP
/OE
B0 B1 B2 B3 B4 B5 B6 B7
NC 1
A0 2
A1 3
A2 4
A3 5
A4 6
A5 ₇
A6 8
A7 9
GND 10
20 VCC
19 /OE
18 ^B0
17 ^B1
16 B2
15 B3
14 B4
13 B5
12 B6
11 B7
2001-04-12
Page 1
MDSS-0007-02
www.vaishali.com
Vaishali Semiconductor 747 Camden Avenue, Suite C Campbell CA 95008 Ph. 408.377.6060 Fax [phone]