MPC8543VTANGA Freescale Semiconductor, MPC8543VTANGA Datasheet - Page 71

• Manufacturer Part Number: MPC8543VTANGA
• Description: Microprocessors - MPU PQ3 8543
• Manufacturer: Freescale Semiconductor

Specifications of MPC8543VTANGA

• Product Category: Microprocessors - MPU
• Rohs: yes
• Processor Series: PowerQUICC III
• Data Bus Width: 32 bit
• Maximum Clock Frequency: 800 MHz
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Package / Case: BGA
• I/o Voltage: 1.8 V, 2.5 V, 3.3 V
• Minimum Operating Temperature: 0 C

to AC-coupling. Its value could be ranged from 140to 240 depending on the clock driver vendor’s
requirement. R2 is used together with the SerDes reference clock receiver’s 50- termination resistor to
attenuate the LVPECL output’s differential peak level such that it meets the SerDes reference clock’s
differential input amplitude requirement (between 200 and 800 mV differential peak). For example, if the
LVPECL output’s differential peak is 900 mV and the desired SerDes reference clock input amplitude is
selected as 600 mV, the attenuation factor is 0.67, which requires R2 = 25 Consult a clock driver chip
manufacturer to verify whether this connection scheme is compatible with a particular clock driver chip.
Figure 46
It assumes the DC levels of the clock driver are compatible with the SerDes reference clock input’s DC
requirement.
Freescale Semiconductor
LVPECL CLK Driver Chip
Clock Driver
Single-Ended CLK
Clock Driver
Clock Driver
Clock Driver
Figure 45. AC-Coupled Differential Connection with LVPECL Clock Driver (Reference Only)
Driver Chip
shows the SerDes reference clock connection reference circuits for a single-ended clock driver.
CLK_Out
CLK_Out
CLK_Out
CLK_Out
CLK_Out
MPC8548E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 9
Figure 46. Single-Ended Connection (Reference Only)
33 
R1
R1
100 Differential PWB Trace
Total 50 Assume clock driver’s
output impedance is about 16 
R2
R2
R2
R2
50
100 Differential PWB Trace
10 nF
10 nF
SD_REF_CLK
SD_REF_CLK
SD_REF_CLK
SD_REF_CLK
50 
50 
50 
50 
High-Speed Serial Interfaces (HSSI)
MPC8548E
SerDes Refer.
CLK Receiver
SerDes Refer.
CLK Receiver
MPC8548E
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