IDT74FST1632861PVG datasheet(5/6 Pages) IDT

5 / 6 page

INDUSTRIALTEMPERATURERANGE

IDT74FST1632861

20-BIT, TWO PORT BUS SWITCH WITH RESISTOR

D.U.T.

VCC

1 MHz

Signal

Generator

CL =

50pF

(3)

VOUT

Switch

Out

Enable/Select

Switch In

Switch In (MUX)

(1)

(2)

Pulse

Generator

D.U.T.

VCC

VIN

VOUT

50pF

500

7.0V

1.5V

DATA

INPUT

TIMING

INPUT

ASYNCHRONOUS

CONTROL

SYNCHRONOUS

CONTROL

tSU

tREM

tSU

HIGH-LOW-HIGH

PULSE

LOW-HIGH-LOW

PULSE

1.5V

SAME PHASE

INPUT TRANSITION

1.5V

VOH

tPLH

OUTPUT

OPPOSITE PHASE

INPUT TRANSITION

1.5V

tPLH

tPHL

VOL

CONTROL

INPUT

1.5V

3.5V

OUTPUT

NORMALLY

LOW

OUTPUT

NORMALLY

HIGH

SWITCH

CLOSED

SWITCH

OPEN

VOL

0.3V

tPLZ

tPZL

tPZH

tPHZ

3.5V

1.5V

ENABLE

DISABLE

VOH

TEST CIRCUITS AND WAVEFORMS

Propagation Delay

Test Circuits for All Outputs

Enable and Disable Times

Set-up, Hold, and Release Times

Pulse Width

NOTES:

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

2. Pulse Generator for All Pulses: Rate

≤ 1.0MHz; tF ≤ 2.5ns; tR ≤ 2.5ns.

Test

Switch

Open Drain

Disable Low

Closed

Enable Low

All Other Tests

Open

SWITCH POSITION

DEFINITIONS:

CL = Load capacitance: includes jig and probe capacitance.

RT = Termination resistance: should be equal to ZOUT of the Pulse Generator.

Charge Injection

NOTES:

1. Select is used with multiplexers for measuring IQDCII during multiplexer select. During

all other tests Enable is used.

2. Used with multiplexers to measure IQDCII only.

3. Charge Injection =

ΔVOUT CL, with Enable toggling for IQCII or Select toggling for IQDCII.

ΔVOUT is the change in VOUT and is measured with a 10MΩ probe.

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