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EP2C8Q208C6 Datasheet, PDF (152/168 Pages) Altera Corporation – Section I. Cyclone II Device Family Data Sheet | |||
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Timing Specifications
Table 5â50. LVDS Transmitter Timing Specification (Part 2 of 2)
â6 Speed Grade
â7 Speed Grade
â8 Speed Grade
Symbol Conditions
Min
Typ
Max
(1)
Max
(2)
Min
Typ
Max
(1)
Max
(2)
Min
Typ
Max
(1)
Max
(2)
Unit
tF A L L
80â20% 150 200
250
150 200
250
150 200
250 (11)
ps
tL O C K
â
ââ
100
ââ
100
ââ
100 (12)
μs
Notes to Table 5â50:
(1) The maximum data rate that complies with duty cycle distortion of 45â55%.
(2) The maximum data rate when taking duty cycle in absolute ps into consideration that may not comply with 45â55%
duty cycle distortion. If the downstream receiver can handle duty cycle distortion beyond the 45â55% range, you
may use the higher data rate values from this column. You can calculate the duty cycle distortion as a percentage
using the absolute ps value. For example, for a data rate of 640 Mbps (UI = 1562.5 ps) and a tD U T Y of 250 ps, the
duty cycle distortion is ± tD U T Y /(UI*2) *100% = ± 250 ps/(1562.5 *2) * 100% = ± 8%, which gives you a duty cycle
distortion of 42â58%.
(3) The TCCS specification applies to the entire bank of LVDS, as long as the SERDES logic is placed within the LAB
adjacent to the output pins.
(4) For extended temperature devices, the maximum input clock frequency for Ã10 through Ã2 modes is 137.5 MHz.
(5) For extended temperature devices, the maximum data rate for Ã10 through Ã2 modes is 275 Mbps.
(6) For extended temperature devices, the maximum input clock frequency for Ã10 through Ã2 modes is 200 MHz.
(7) For extended temperature devices, the maximum data rate for Ã10 through Ã2 modes is 400 Mbps.
(8) For extended temperature devices, the maximum input clock frequency for Ã1 mode is 340 MHz.
(9) For extended temperature devices, the maximum data rate for Ã1 mode is 340 Mbps.
(10) For extended temperature devices, the maximum output jitter (peak to peak) is 600 ps.
(11) For extended temperature devices, the maximum tR I S E and tFA L L are 300 ps.
(12) For extended temperature devices, the maximum lock time is 500 us.
5â62
Cyclone II Device Handbook, Volume 1
Altera Corporation
February 2008
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