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IDT74FCT3807

3.3V CMOS 1-TO-10 CLOCK DRIVER

Integrated Device Technology 

IDT74FCT3807/A

3.3V CMOS 1-TO-10 CLOCK DRIVER

TEST CIRCUITS

COMMERCIAL/INDUSTRIAL TEMPERATURE RANGES

VIN

Pulse

Generator

VCC

D.U.T.

RT

VCC

100Ω

VOUT

100Ω

VIN

Pulse

Generator

10pF

VCC

D.U.T.

RT

VOUT

50Ω

220pF

10pF

Figure 1. ZO = 50Ω to VCC/2, CL = 10pF

Figure 2. ZO = 50Ω AC Termination, CL = 10pF

The capacitor value for ac termination is determined by the operating frequency. For very

low frequencies a higher capacitor value should be selected.

VCC

VIN

Pulse

Generator

D.U.T.

RT

VOUT

30pF

CL

Figure 3. CL = 30pF Circuit

VCC

VIN

Pulse

Generator

D.U.T.

RT

VOUT

50pF

CL

Figure 3. CL = 50pF Circuit

6V

VCC

GND

VIN

Pulse

Generator

D.U.T.

VOUT

RT

50pF

CL

Figure 5. Enable and Disable Time Circuit

500Ω

500Ω

ENABLE AND DISABLE TIME

SWITCH POSITION

Test

Disable LOW

Enable LOW

Disable HIGH

Enable HIGH

Switch

6V

GND

DEFINITIONS:

CL = Load capacitance: includes jig and probe capacitance.

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

6

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