dp83241 National Semiconductor Corporation, dp83241 Datasheet - Page 18

• Manufacturer Part Number: dp83241
• Description: Cdd Device Fddi Clock Distribution Device
• Manufacturer: National Semiconductor Corporation

5 0 Detailed Information
(Continued)
5 5 SYSTEM DEBUGGING FLOWCHART
TL F 10385 – 23
Note 1 If the crystal oscillator is chosen as the input reference source then the XTL OUT pin should be checked for the correct frequency of oscillation If the
d
oscillator fails to oscillate then the DC voltage on these pins should be checked and be equal to approximately V
2 (with or without the crystal oscillator
CC
present)
5 6 AC TEST CIRCUITS
TL F 10385 – 26
FIGURE 5-12 Switching Test Circuit
for All ECL Output Signals
TL F 10385 – 24
FIGURE 5-11 Switching Test Circuit
for All TTL Output Signals
18