PI3B16210/162210

3.3V, Hot Insertion, 20-Bit, 2-Port BusSwitch

3

PS8193B

11/09/98

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Com.

Parameters

Description

Min

Max

Units

tPLH

16210

0.25

tPHL

Ax to Bx, Bx to Ax

Ω

162210

1.25

tPZH

Bus Enable Time

1

4.5

ns

tPZL

BE to Ax or Bx

tPHZ

Bus Disable Time

1

5.0

BE to Ax or Bx

Pericom Semiconductor Corporation

2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com

Power Supply Characteristics

Parameters Description

Test Conditions

(1)

Min.

Typ

(2)

Max.

Units

Quiescent Power

10

µA

Supply Current

Supply Current per

(3)

750

µA

Input @ TTL HIGH

Supply Current per

0.25

mA/

A and B Pins Open

MHz

BE = GND

Control Input Toggling

50% Duty Cycle

Notes:

1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.

2. Typical values are at Vcc = 3.3V, +25°C ambient.

3. Per TTL driven input (control inputs only); A and B pins do not contribute to Icc.

4. This current applies to the control inputs only and represent the current required to switch internal capacitance at the specified

frequency. The A and B inputs generate no significant AC or DC currents as they transition. This parameter is not tested, but is

guaranteed by design.

Switching Characteristics over Operating Range

Notes:

1. See test circuit and wave forms.

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.

R =

500Ω