45732 AMD 780E Databook 3.10
© 2009 Advanced Micro Devices, Inc.
5-6
Proprietary
Electrical Characteristics
Figure 5-2 DC Characteristics of the LVDS Interface
Table 5-12 Electrical Requirements for the LVTM Interface in LVDS Mode
Symbol
Parameter
Min
Typical
Max
Unit
Note
VCM
Differential Output Common-mode Voltage
1.125
–
1.375
V
1
DVCM
Differential Output Common-mode Voltage
Ripple
–
–
150
mV
1
VH
Single-ended High Level Output Voltage
VCM + 0.125
–
VCM + 0.225
V
1
VL
Single-ended Low Level Output Voltage
VCM - 0.225
–
VCM - 0.125
V
1
VSW
Single-ended Output Swing
257
–
454
mV
1
VOS
Differential Output Overshoot (Ringing)
–
–
160
mV
1
VUS
Differential Output Undershoot (Ringing)
–
–
160
mV
1
IDDLP
Average Supply Current at LTPVDD18
–
10.0
–
mA
2
IDDLV
Average Supply Current at VDDLT18/33
–
100.0
–
mA
2
IOL
Output Low Current
–
2.5
–
mA
IOH
Output High Current
–
4.5
–
mA
IPDLP
Power Down Current at LTPVDD18
–
10.0
–
A
3
IPDLV
Power Down Current at VDDLT18/33
–
10.0
–
A
3
Notes:
1 Differential termination is 100 ohms.
2 Measured under typical conditions, at minimum Differential Clock Frequency and maximum LVDS PLL VOC frequency.
3 Measured under typical conditions, based on typical leakage values.
4 Figure 5-2 below illustrates the DC Characteristics of the LVDS interface.
VSW
0V
+257 to
+454mV
-257 to
-454mV
Differential Waveform
VSW
VCM = 1.125-
1.375V
Single-ended Waveforms
Ground