IDT74FCT3807 查看數據表（PDF） - Integrated Device Technology
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IDT74FCT3807 Datasheet PDF : 8 Pages
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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.
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