參數(shù)資料
型號： MPC8378VRANDA
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 32-BIT, 266 MHz, MICROPROCESSOR, PBGA689
封裝： 31 X 31 MM, 2.46 MM HEIGHT, 1 MM PITCH, LEAD FREE, PLASTIC, BGA-689
文件頁數(shù)： 97/125頁
文件大?。?/td> 894K
代理商： MPC8378VRANDA
MPC8378E PowerQUICC II Pro Processor Hardware Specifications, Rev. 5
Freescale Semiconductor
73
NOTE
The reference impedance for return loss measurements is 50
to ground for both the D+
and D– line (that is, as measured by a Vector Network Analyzer with 50
probes—see
Figure 48). Note that the series capacitors, CPEACCTX, are optional for the return loss
measurement.
Figure 47. Minimum Receiver Eye Timing and Voltage Compliance Specification
15.5.1
Compliance Test and Measurement Load
The AC timing and voltage parameters must be verified at the measurement point, as specified within 0.2 inches of the package
pins, into a test/measurement load shown in Figure 48.
NOTE
The allowance of the measurement point to be within 0.2 inches of the package pins is
meant to acknowledge that package/board routing may benefit from D+ and D– not being
exactly matched in length at the package pin boundary. If the vendor does not explicitly
state where the measurement point is located, the measurement point is assumed to be the
D+ and D– package pins.
Figure 48. Compliance Test/Measurement Load
VRX-DIFFp-p-MIN > 175 mV
0.4 UI = TRX-EYE-MIN
VRX-DIFF = 0 mV
(D+ D– Crossing Point)
VRX-DIFF = 0 mV
(D+ D– Crossing Point)
TX Silicon +
Package
R = 50
R = 50
C = CTX
D+ Package Pin
D– Package Pin
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相關代理商/技術參數(shù)
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