IDT74FST163383, IDT74FST1632383

20-BIT BUS EXCHANGE SWITCH

COMMERCIAL TEMPERATURE RANGE

5

TEST CIRCUITS AND WAVEFORMS

TEST CIRCUITS FOR ALL OUTPUTS

SWITCH POSITION

Pulse

Generator

D.U.T.

50pF

500

Ω

500

Ω

7.0V

3V

1.5V

0V

3V

1.5V

0V

3V

1.5V

0V

3V

1.5V

0V

DATA

INPUT

TIMING

INPUT

ASYNCHRONOUS CONTROL

PRESET

CLEAR

ETC.

SYNCHRONOUS CONTROL

HIGH-LOW-HIGH

PULSE

LOW-HIGH-LOW

PULSE

1.5V

1.5V

SAME PHASE

INPUT TRANSITION

3V

1.5V

0V

1.5V

OUTPUT

OPPOSITE PHASE

INPUT TRANSITION

3V

1.5V

0V

CONTROL

INPUT

3V

1.5V

0V

3.5V

0V

OUTPUT

NORMALLY

LOW

OUTPUT

NORMALLY

HIGH

SWITCH

CLOSED

SWITCH

OPEN

0.3V

0.3V

3.5V

0V

1.5V

1.5V

ENABLE

DISABLE

PRESET

CLEAR

CLOCK ENABLE

ETC.

ENABLE AND DISABLE TIMES

PROPAGATION DELAY

PULSE WIDTH

SET-UP, HOLD AND RELEASE TIMES

Test

Switch

Disable Low

Enable Low

Closed

All Other Tests

Open

Open Drain

DEFINITIONS:

Load capacitance: includes jig and probe capacitance.

= Termination resistance: should be equal to Z

OUT

of the Pulse

Generator.

3474 lnk 08

3474 lnk 03

3474 lnk 04

3474 lnk 05

3474 lnk 06

3474 lnk 07

NOTES:

1. Diagram shown for input Control Enable-LOW and input Control Disable-

HIGH

2. Pulse Generator for All Pulses: Rate