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PARAMETER MEASUREMENT INFORMATION

(see Note A)

TEST CIRCUIT

S1

2

Open

GND

Output

Waveform 1

S1 at 2

(see Note B)

Output

Waveform 2

S1 at Open

(see Note B)

0 V

0 V

0 V

Output

Control

VOLTAGE WAVEFORMS

VOLTAGE WAVEFORMS

ENABLE AND DISABLE TIMES

Output

B. Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by the output control.

Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control.

C. All input pulses are supplied by generators having the following characteristics: PRR

D. The outputs are measured one at a time, with one transition per measurement.

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

H. All parameters and waveforms are not applicable to all devices.

50

Ω

DUT

50

Ω

50

Ω

50

Ω

TEST

S1

2.5 V

± 0.2 V

3.3 V

± 0.3 V

2.5 V

± 0.2 V

3.3 V

± 0.3 V

2.5 V

± 0.2 V

3.3 V

± 0.3 V

Open

Open

2

2

Open

Open

500

Ω

500

Ω

500

Ω

500

Ω

500

Ω

500

Ω

3.6 V or GND

5.5 V or GND

GND

GND

3.6 V

5.5 V

30 pF

50 pF

30 pF

50 pF

30 pF

50 pF

0.15 V

0.3 V

0.15 V

0.3 V

Output

Control

Input Generator

Input Generator

SN74CB3T3257

4-BIT 1-OF-2 FET MULTIPLEXER/DEMULTIPLEXER

2.5-V/3.3-V LOW-VOLTAGE BUS SWITCH WITH 5-V-TOLERANT LEVEL SHIFTER

SCDS149 – OCTOBER 2003 – REVISED MARCH 2005

Figure 2. Test Circuit and Voltage Waveforms

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