FST3125(1999) 데이터 시트보기 (PDF) - Fairchild Semiconductor

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FST3125
(Rev.:1999)

Quad Bus Switch

Fairchild Semiconductor 

AC Electrical Characteristics

Symbol

Parameter

TA = −40 °C to +85 °C,

CL = 50pF, RU = RD = 500Ω

VCC = 4.5 – 5.5V

VCC = 4.0V

Units

Conditions

Figure No.

Min

Max

Min

Max

tPHL,tPLH

Prop Delay Bus to Bus (Note 6)

0.25

0.25

ns VI = OPEN

Figure 1

Figure 2

tPZH, tPZL

Output Enable Time

1.0

5.0

5.5

ns

VI = 7V for tPZL

Figure 1

VI = OPEN for tPZH

Figure 2

tPHZ, tPLZ

Output Disable Time

1.5

5.3

5.6

ns

VI = 7V for tPLZ

Figure 1

VI = OPEN for tPHZ

Figure 2

Note 6: 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 7)

Symbol

Parameter

Typ

CIN

Control Pin Input Capacitance

3

CI/O

Input/Output Capacitance

5

Note 7: TA = +25°C, f = 1 MHz, Capacitance is characterized but not tested.

Max

Units

pF

pF

Conditions

VCC = 5.0V

VCC, OE = 5.0V

AC Loading and Waveforms

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

Note: CL includes load and stray capacitance

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

FIGURE 1. AC Test Circuit

FIGURE 2. AC Waveforms

3

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