參數(shù)資料
型號(hào): Am79C874
廠商: Advanced Micro Devices, Inc.
英文描述: NetPHY-1LP Low Power 10/100-TX/FX Ethernet Transceiver
中文描述: NetPHY - 1LP低功率10/100-TX/FX以太網(wǎng)收發(fā)器
文件頁數(shù): 46/60頁
文件大小: 869K
代理商: AM79C874
46
Am79C874
P R E L I M I N A R Y
SWITCHING CHARACTERISTICS
Note:
Parametric values are the same for commercial devices and industrial devices.
System Clock Signal
Figure 14.
Clock Signal
MLT-3 Signals
Figure 15.
MLT-3 Test Waveform
Symbol
t
CLK
t
CLKH
t
CLKL
t
CLR
t
CLF
Parameter Description
REFCLK Period
REFCLK Width HIGH
REFCLK Width LOW
REFCLK Rise Time
REFCLK Fall Time
Min.
39.998
18
18
-
-
Max.
40.002
22
22
5
5
Unit
ns
ns
ns
ns
ns
Symbol
t
TXR
t
TXF
t
TXRFS
t
TXDCD
t
TXJ
Parameter Description
Rise Time of MLT-3 Signal
Fall Time of MLT-3 Signal
Rise Time and Fall Time Symmetry of MLT-3 Signal
Duty Cycle Distortion Peak to Peak
Transmit Jitter Using Scrambled Idle Signals
Min.
3.0
3.0
-
-
-
Max.
5.0
5.0
5
0.5
1.4
Unit
ns
ns
%
ns
ns
t
CLR
80%
20%
t
CLF
t
CLKH
t
CLKL
t
CLK
REFCLK
22235I-16
t
TXR
t
TXF
16 ns
TX
±
t
XTDCD
t
XTDCD
1
0
1
0
1
0
1
22235I-17
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