INDUSTRIALTEMPERATURERANGE

74FCT3244/A

3.3VCMOSOCTALBUFFER/LINEDRIVER

5

Feb.11.20

Pulse

Generator

RT

D.U.T.

V CC

VIN

CL

VOUT

50pF

500

Ω

500

Ω

Open

GND

6v

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

tSU

tH

tREM

tSU

tH

PRESET

CLEAR

CLOCK ENABLE

ETC.

HIGH-LOW-HIGH

PULSE

LOW-HIGH-LOW

PULSE

tW

1.5V

1.5V

SAME PHASE

INPUT TRANSITION

3V

1.5V

0V

1.5V

VOH

tPLH

OUTPUT

OPPOSITE PHASE

INPUT TRANSITION

3V

1.5V

0V

tPLH

tPHL

tPHL

VOL

CONTROL

INPUT

3V

1.5V

0V

3V

0V

OUTPUT

NORMALLY

LOW

OUTPUT

NORMALLY

HIGH

SWITCH

6V

SWITCH

GND

VOL

0.3V

0.3V

tPLZ

tPZL

tPZH

tPHZ

3V

0V

1.5V

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; ZO ≤ 50Ω; tF ≤ 2.5ns; tR ≤ 2.5ns.

3. If Vcc is below 3V, input voltage swings should be adjusted not to exceed Vcc.

Test

Switch

Open Drain

Disable Low

6V

Enable Low

Disable High

GND

Enable High

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.