FST34170(2000) View Datasheet(PDF) - Fairchild Semiconductor

Part Name

Description

Manufacturer

FST34170
(Rev.:2000)

17-Bit to 34-Bit Multiplexer/Demultiplexer Bus Switch

Fairchild Semiconductor 

AC Electrical Characteristics

TA = −40 °C to +85 °C,

Symbol

Parameter

CL = 50 pF, RU= RD = 500Ω

VCC = 4.5 − 5.5V

VCC = 4.0V

Units

Conditions

Figure No.

Min

Max

Min

Max

tPHL, tPLH

tPZH

A or B, to B or A (Note 7)

Output Enable Time,

SEL to A, B

0.25

7.0

30.0

0.25

35.0

ns VI = OPEN

ns

VI = OPEN for tPZH

Figures 1, 2

Figures 1, 2

tPZL

Output Enable Time,

SEL to A, B

7.0

30.0

35.0

ns

VI = 7V for tPZL

Figures 1, 2

tPHZ

Output Disable Time,

SEL to A, B

1.0

6.9

7.3

ns

VI = OPEN for tPHZ

Figures 1, 2

tPLZ

Output Disable Time,

SEL to A, B

1.0

7.7

7.7

ns

VI = 7V for tPLZ

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 source (zero output impedance).

Capacitance (Note 8)

Symbol

Parameter

Typ

CIN

Control pin Input Capacitance

4

CI/O OFF

Input/Output Capacitance “OFF State”

8

Note 8: TA = +25°C, f = 1 MHz, Capacitance is characterized but not tested.

Max

Units

Conditions

pF

VCC = 5.0V

pF

VCC = 5.0V, Switch OFF

AC Loading and Waveforms

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

Note: CL includes load and stray capacitance, CL = 50 pF

Note: Input PRR = 1.0 MHz, tW = 500 ns

FIGURE 1. AC Test Circuit

FIGURE 2. AC Waveforms

3

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