VS3257/VS32257

2001-04-12

Page 5

MDSS-0009-01

www.vaishali.com

Vaishali Semiconductor

747 Camden Avenue, Suite C

Campbell

CA 95008

Ph. 408.377.6060

Fax 408.377.6063

Table 8. Switching Characteristics Over Operating Range

%

Ω unless otherwise stated.

Symbol

Description

(1)

VS3257

Min

(3)

Max

VS32257

Min

(3)

Max

Units

Data Propagation Delay

0.25

1.25

ns

0.5

5.2

0.5

6.2

ns

0.5

4.8

0.5

5.8

ns

Switch Turn-off Delay

0.5

5.0

0.5

5.0

ns

Notes:

1.

See test circuits and waveforms.

2.

This parameter is the calculated theoretical RC time constant of ON-state resistance of the switch and the specified load

capacitance when driven by an ideal voltage source (zero source impedance). This time-constant is on the order of 0.25 ns for

VS3257 and 1.25 ns for VS32257. Since this time-constant is much smaller than rise/fall times of typical driving signals, it adds

very little propagation delay to the system.

3.

This parameter is guaranteed, but not production tested.

Figure 6. AC Test Circuit and Switching Waveforms

AC Test Circuit

Load Switch Position

TEST

S1

Open

Closed

Open

Input Conditions

Input voltage = 0 V to 3.0 V

Pulse

Generator

DUT

V

IN

V

OUT

C

L

500

Ω

7 V

50

Ω=Coax to

Oscilloscope

50

Ω

450

Ω