mpc9351 Integrated Device Technology, mpc9351 Datasheet - Page 9

• Manufacturer Part Number: mpc9351
• Description: Low Voltage Pll Clock Driver
• Manufacturer: Integrated Device Technology

IDT™ Low Voltage PLL Clock Driver
Freescale Timing Solutions Organization has been acquired by Integrated Device Technology, Inc
MPC9351
Low Voltage PLL Clock Driver
Advanced Clock Drivers Devices
Freescale Semiconductor
3.0
2.5
2.0
1.5
1.0
0.5
0
Figure 9. Single versus Dual Waveforms
t
2
D
= 3.8956
OutA
In
4
Figure 11. TCLK MPC9351 AC Test Reference for V
Differential Pulse
Generator
Generator
Z = 50Ω
Z = 50Ω
6
Pulse
Time (ns)
t
D
= 3.9386
OutB
8
Figure 12. PCLK MPC9351 AC Test Reference
10
Z
O
V
= 50Ω
TT
Z
12
O
R
= 50Ω
T
R
= 50Ω
T
= 50Ω
14
V
TT
MPC9351 DUT
9
MPC9351 DUT
cause any false clock triggering; however, designers may be
uncomfortable with unwanted reflections on the line. To better
match the impedances when driving multiple lines, the
situation in
terminating resistors are reduced such that when the parallel
combination is added to the output buffer impedance, the line
impedance is perfectly matched.
Since this step is well above the threshold region it will not
Figure 10. Optimized Dual Line Termination
CC
Figure 10
MPC9351
Output
= 3.3 V and V
Buffer
14Ω
14Ω + 22Ω || 22Ω = 50Ω || 50Ω
Z
Z
O
O
= 50Ω
= 50Ω
should be used. In this case, the series
R
R
25Ω = 25Ω
T
T
R
R
CC
= 50Ω
S
S
= 50Ω
= 22Ω
= 22Ω
= 2.5 V
V
V
TT
TT
Z
Z
O
O
= 50Ω
= 50Ω
MPC9351
NETCOM
MPC9351
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