參數(shù)資料
型號(hào)： MPC8378VRAGDA
廠商： Freescale Semiconductor
文件頁數(shù)： 93/128頁
文件大小： 0K
描述： MPU POWERQUICC II 400MHZ 689PBGA
標(biāo)準(zhǔn)包裝： 27
系列： MPC83xx
處理器類型： 32-位 MPC83xx PowerQUICC II Pro
速度： 400MHz
電壓： 1V
安裝類型： 表面貼裝
封裝/外殼： 689-BBGA 裸露焊盤
供應(yīng)商設(shè)備封裝： 689-TEPBGA II（31x31）
包裝： 托盤
MPC8378E PowerQUICC II Pro Processor Hardware Specifications, Rev. 8
Freescale Semiconductor
67
15.4.1
Differential Transmitter (Tx) Output
This table defines the specifications for the differential output at all transmitters. The parameters are
specified at the component pins.
Table 57. Differential Transmitter (Tx) Output Specifications
Parameter
Conditions
Symbol
Min
Typical
Max
Units
Note
Unit interval
Each UPETX is 400 ps ± 300
ppm. UPETX does not account
for Spread Spectrum Clock
dictated variations.
UI
399.88
400
400.12
ps
Differential
peak-to-peak output
voltage
VPEDPPTX = 2 × |VTX-D+ –
VTX-D-|
VTX-DIFFp-p
0.8
—
1.2
V
De-emphasized
differential output
voltage (ratio)
Ratio of the VPEDPPTX of the
second and following bits after
a transition divided by the
VPEDPPTX of the first bit after a
transition.
VTX-DE-RATIO
–3.0
–3.5
–4.0
dB
Minimum Tx eye width
The maximum transmitter
jitter can be derived as
TTX-MAX-JITTER = 1 –
UPEEWTX= 0.3 UI.
TTX-EYE
0.70
—
UI
Maximum time between
the jitter median and
maximum deviation
from the median
Jitter is defined as the
measurement variation of the
crossing points (VPEDPPTX = 0
V) in relation to a recovered Tx
UI. A recovered Tx UI is
calculated over 3500
consecutive unit intervals of
sample data. Jitter is
measured using all edges of
the 250 consecutive UI in the
center of the 3500 UI used for
calculating the Tx UI.
TTX-EYE-MEDIAN-to-
MAX-JITTER
—
0.15
UI
D+/D– Tx output
rise/fall time
—TTX-RISE, TTX-FALL
0.125
—
UI
RMS AC peak common
mode output voltage
VPEACPCMTX = RMS(|VTXD+ –
VTXD-|/2 – VTX-CM-DC)
VTX-CM-DC = DC(avg) of
|VTX-D+ – VTX-D-|/2
VTX-CM-ACp
——
20
mV
Absolute delta of DC
common mode voltage
during LO and electrical
idle
|VTX-CM-DC (during LO) –
VTX-CM-Idle-DC (During Electrical
Idle)|<=100 mV
VTX-CM-DC = DC(avg) of
|VTX-D+ – VTX-D-|/2 [LO]
VTX-CM-Idle-DC = DC(avg) of
|VTX-D+ – VTX-D-|/2 [Electrical
Idle]
VTX-CM-DC- ACTIVE-
IDLE-DELTA
0—
100
mV
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