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FSTU6800

10-Bit Bus Switch with Precharged Outputs and −2V Undershoot Protection

Fairchild Semiconductor 

AC Electrical Characteristics

Symbol

Parameter

TA = −40 °C to +85 °C,

CL = 50 pF, 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)

tPZH

Output Enable Time

7.0

tPZL

7.0

0.25

30.0

30.0

0.25

ns

VI = OPEN

35.0

ns

VI = OPEN

BiasV = GND

35.0

ns

VI = 7V

BiasV = 3V

Figures 1, 2

Figures 1, 2

tPHZ

Output Disable Time

tPLZ

1.0

6.1

1.0

7.3

6.5

ns

VI = OPEN

BiasV = GND

6.8

ns

VI = 7V

BiasV = 3V

Figures 1, 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 50 pF load capacitance, when driven by an ideal voltage the 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, RU = RD = 500 Ω

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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