参数资料
型号: LFE3-35EA-6FN484C
厂商: LATTICE SEMICONDUCTOR CORP
元件分类: FPGA
中文描述: FPGA, PBGA484
封装: 23 X 23 MM, LEAD FREE, FPBGA-484
文件页数: 123/130页
文件大小: 2667K
代理商: LFE3-35EA-6FN484C
3-40
DC and Switching Characteristics
Lattice Semiconductor
LatticeECP3 Family Data Sheet
PCI Express Electrical and Timing Characteristics
AC and DC Characteristics
Over Recommended Operating Conditions
Symbol
Description
Test Conditions
Min
Typ
Max
Units
Transmit
1
UI
Unit interval
399.88
400
400.12
ps
VTX-DIFF_P-P
Differential peak-to-peak output voltage
0.8
1.0
1.2
V
VTX-DE-RATIO
De-emphasis differential output voltage
ratio
-3
-3.5
-4
dB
VTX-CM-AC_P
RMS AC peak common-mode output
voltage
——
20
mV
VTX-RCV-DETECT
Amount of voltage change allowed dur-
ing receiver detection
——
600
mV
VTX-DC-CM
Tx DC common mode voltage
0
VCCOB + 5%
V
ITX-SHORT
Output short circuit current
VTX-D+=0.0V
VTX-D-=0.0V
——
90
mA
ZTX-DIFF-DC
Differential output impedance
80
100
120
Ohms
RLTX-DIFF
Differential return loss
10
dB
RLTX-CM
Common mode return loss
6.0
dB
TTX-RISE
Tx output rise time
20 to 80%
0.125
UI
TTX-FALL
Tx output fall time
20 to 80%
0.125
UI
LTX-SKEW
Lane-to-lane static output skew for all
lanes in port/link
——
1.3
ns
TTX-EYE
Transmitter eye width
0.75
UI
TTX-EYE-MEDIAN-TO-MAX-JITTER
Maximum time between jitter median
and maximum deviation from median
0.125
UI
Receive
1, 2
UI
Unit Interval
399.88
400
400.12
ps
VRX-DIFF_P-P
Differential peak-to-peak input voltage
0.34
3
—1.2
V
VRX-IDLE-DET-DIFF_P-P
Idle detect threshold voltage
65
340
3
mV
VRX-CM-AC_P
Receiver common mode voltage for AC
coupling
——
150
mV
ZRX-DIFF-DC
DC differential input impedance
80
100
120
Ohms
ZRX-DC
DC input impedance
40
50
60
Ohms
ZRX-HIGH-IMP-DC
Power-down DC input impedance
200K
Ohms
RLRX-DIFF
Differential return loss
10
dB
RLRX-CM
Common mode return loss
6.0
dB
TRX-IDLE-DET-DIFF-ENTERTIME
Maximum time required for receiver to
recognize and signal an unexpected idle
on link
——
ms
1. Values are measured at 2.5 Gbps.
2. Measured with external AC-coupling on the receiver.
3.Not in compliance with PCI Express 1.1 standard.
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