MPC93R52 Motorola, MPC93R52 Datasheet - Page 10

• Manufacturer Part Number: MPC93R52
• Description: LOW VOLTAGE 3.3V LVCMOS 1:11 CLOCK GENERATOR
• Manufacturer: Motorola

MPC93R52
cause any false clock triggering, however designers may be
uncomfortable with unwanted reflections on the line. To better
MOTOROLA
Since this step is well above the threshold region it will not
3.0
2.5
2.0
1.5
1.0
0.5
0
Figure 11. Single versus Dual Waveforms
t D = 3.8956
2
In
OutA
4
Figure 13. CCLK MPC93R52 AC test reference for V cc = 3.3V and V cc = 2.5V
Generator
Z = 50
Pulse
6
TIME (nS)
t D = 3.9386
W
OutB
8
10
Z O = 50
12
R T = 50
14
V TT
MPC93R52
10
DUT
match the impedances when driving multiple lines the
situation in Figure 12. “Optimized Dual Line Termination”
should be used. In this case the series terminating resistors
are reduced such that when the parallel combination is added
to the output buffer impedance the line impedance is perfectly
matched.
Figure 12. Optimized Dual Line Termination
MPC93R52
OUTPUT
BUFFER
14
14 + 22
Z O = 50
R S = 22
R S = 22
25 = 25
R T = 50
k
22 = 50
V TT
Z O = 50
Z O = 50
k
TIMING SOLUTIONS
50