EP2SGX30C Datasheet, PDF (216/314 Pages) Altera Corporation – Stratix II GX Device

Operating Conditions
Figures 4–6 and 4–7 show receiver input and transmitter output
waveforms, respectively, for all differential I/O standards (LVDS and
LVPECL).
Figure 4–6. Receiver Input Waveforms for Differential I/O Standards
Single-Ended Waveform
V_ID
V_CM
Positive Channel (p) = V_IH
Negative Channel (n) = V_IL
Ground
Differential Waveform
V_ID
V_{ID (Peak-to-Peak)}
p−n=0V
V_ID
Figure 4–7. Transmitter Output Waveforms for Differential I/O Standards
Single-Ended Waveform
V_CM
V_OD
Positive Channel (p) = V_OH
Negative Channel (n) = V_OL
Ground
Differential Waveform
V_OD
p−n=0V
V_OD
4–46
Stratix II GX Device Handbook, Volume 1
Altera Corporation
October 2007