11c90 National Semiconductor Corporation, 11c90 Datasheet - Page 5

• Manufacturer Part Number: 11c90
• Description: 650 Mhz Prescalers
• Manufacturer: National Semiconductor Corporation

Conditions
V
V
R
C
I
C
Note 7 Use high impedance to test QTTL
Note 8 For High frequency test use AC coupled input as in Figure 3
1
CC
EE
T
L
e
e
e
e
e b
e a
0 1 pF
L
Jig and stray capacitance
50X (scope input impedance)
2
Connect pin 13 to V
Adjust input amplitude to 350 mV peak-to-peak
e
3 2V
2 0V
equal 50X impedance lines
EE
k
5 0 pF
FIGURE 1 AC Test Circuit
5
TL F 9892 – 3
TL F 9892 – 4