US5C3305

Preliminary

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

4 of 5

www.unisonic.com.tw

QW-R121-025.a



PARAMETER

SYMBOL

TEST CONDITIONS

(Note 1)

MIN

TYP

MAX

UNIT

0.25

ns

Propagation Delay Time Signal A to B,

B to A (Note 2, 3)

1.0

0.25

ns

5.5

ns

Bus Enable Time

1.0

4.9

ns

4.5

ns

Bus Disable Time

4.2

ns

Notes: 1. See test circuit and waveforms.

2. This parameter is guaranteed but not tested on Propagation Delays.

3. The bus switch contributes no propagational delay other than the RC delay of the On-Resistance of the

switch and the load capacitance. The time constant for the switch alone is of the order of 0.25ns for 50pF

load. Since this time constant is much smaller than the rise/fall times of typical driving signals, it adds very

little propagational delay to the system. Propagational delay of the bus switch when used in a system is

determined by the driving circuit on the driving side of the switch and its interaction with the load on the

driven side.