FST3345QSC View Datasheet(PDF) - Fairchild Semiconductor

Part Name

Description

Manufacturer

FST3345QSC

8-Bit Bus Switch

Fairchild Semiconductor 

AC Electrical Characteristics

Symbol

Parameter

TA 40 qC to 85 qC,

CL 50 pF, RU RD 500:

VCC 4.5  5.5V

VCC 4.0V

Units

Conditions

Figure

No.

Min

Max

Min

Max

tPHL,tPLH Propagation Delay Bus to Bus

(Note 7)

0.25

0.25

ns VI OPEN

Figures

1, 2

tPZH, tPZL Output Enable Time

1.5

6.5

7.0

ns

VI 7V for tPZL

VI OPEN for tPZH

Figures

1, 2

tPHZ, tPLZ Output Disable Time

1.0

8.0

8.2

ns

VI 7V for tPLZ

VI OPEN for tPHZ

Figures

1, 2

Note 7: This parameter is guaranteed by design but is not tested. The bus switch contributes no propagation delay other than the RC delay of the typical On

Resistance of the switch and the 50pF load capacitance, when driven by an ideal voltage the source (zero output impedance).

Capacitance (Note 8)

Symbol

Parameter

Typ

CIN

Control Pin Input Capacitance

4

CI/O

Input/Output Capacitance

5

Note 8: TA 25qC, f 1 MHz, Capacitance is characterized but not tested.

Max

Units

pF

pF

Conditions

VCC 5.0V

VCC, OE 5.0V, OE 0V

AC Loading and Waveforms

Note: Input driven by 50 : source terminated in 50 :

Note: CL includes load and stray capacitance

Note: Input PRR 1.0 MHz tW 500 nS

FIGURE 1. AC Test Circuit

FIGURE 2. AC Waveforms

3

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