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参数资料
型号： MC8640DHX1250HE
厂商： FREESCALE SEMICONDUCTOR INC
元件分类： 微控制器/微处理器
英文描述： 32-BIT, 1250 MHz, MICROPROCESSOR, CBGA1023
封装： 33 X 33 MM, CERAMIC, FCBGA-1023
文件页数： 101/130页
文件大小： 1495K
代理商： MC8640DHX1250HE
MPC8640 and MPC8640D Integrated Host Processor Hardware Specifications, Rev. 3
72
Freescale Semiconductor
PCI Express
14.4.3
Differential Receiver (Rx) Input Specifications
Table 50 defines the specifications for the differential input at all receivers. The parameters are specified
at the component pins.
Table 50. Differential Receiver Input Specifications
Parameter
Symbol
Min
Nom
Max
Units
Comments
Unit Interval
UI
399.88
400
400.12
ps
Each UI is 400 ps ± 300 ppm. UI does not
account for spread spectrum clock dictated
variations. See Note 1.
Differential
Peak-to-Peak
Output Voltage
VRX-DIFFp-p
0.175
—
1.200
V
VRX-DIFFp-p = 2 × |VRX-D+ – VRX-D–|
See Note 2.
Minimum
Receiver Eye
Width
TRX-EYE
0.4
—
UI
The maximum interconnect media and
transmitter jitter that can be tolerated by the
receiver can be derived as TRX-MAX-JITTER =
1 – TRX-EYE = 0.6 UI.
See Notes 2 and 3.
Maximum time
between the jitter
median and
maximum
deviation from
the median.
TRX-EYE-MEDIAN-to-MAX
-JITTER
—
0.3
UI
Jitter is defined as the measurement variation
of the crossing points (VRX-DIFFp-p = 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. See Notes 2, 3 and 7.
AC Peak
Common Mode
Input Voltage
VRX-CM-ACp
——
150
mV
VRX-CM-ACp = |VRXD+ – VRXD-|/2 – VRX-CM-DC
VRX-CM-DC = DC(avg) of |VRX-D+ – VRX-D–|/2
See Note 2
Differential
Return Loss
RLRX-DIFF
15
—
dB
Measured over 50 MHz to 1.25 GHz with the
D+ and D– lines biased at +300 mV and
–300 mV, respectively.
See Note 4
Common Mode
Return Loss
RLRX-CM
6
—
dB
Measured over 50 MHz to 1.25 GHz with the
D+ and D– lines biased at 0 V. See Note 4
DC Differential
Input Impedance
ZRX-DIFF-DC
80
100
120
Ω
Rx DC Differential mode impedance. See
Note 5
DC Input
Impedance
ZRX-DC
40
50
60
Ω
Required Rx D+ as well as D– DC impedance
(50 ± 20% tolerance). See Notes 2 and 5.
Powered Down
DC Input
Impedance
ZRX-HIGH-IMP-DC
200
—
k
Ω
Required Rx D+ as well as D– DC impedance
when the receiver terminations do not have
power. See Note 6.
Electrical Idle
Detect Threshold
VRX-IDLE-DET-DIFFp-p
65
—
175
mV
VRX-IDLE-DET-DIFFp-p = 2 × |VRX-D+ –VRX-D–|
Measured at the package pins of the receiver
相关PDF资料
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MC8640DHX1067NC 32-BIT, 1067 MHz, MICROPROCESSOR, CBGA1023
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相关代理商/技术参数
参数描述
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MC8640DTHX1000HE 功能描述:微处理器 - MPU G8 REV 3.0 1.05V -40/105C RoHS:否 制造商:Atmel 处理器系列:SAMA5D31 核心:ARM Cortex A5 数据总线宽度:32 bit 最大时钟频率:536 MHz 程序存储器大小:32 KB 数据 RAM 大小:128 KB 接口类型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作电源电压:1.8 V to 3.3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-324
MC8640DTHX1000N 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Integrated Host Processor Hardware Specifications Addendum for the MC8640xTxxyyyyaC Series
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