|
EP2C5F256I8N Datasheet, PDF (100/168 Pages) Altera Corporation – Section I. Cyclone II Device Family Data Sheet | |||
|
◁ |
Operating Conditions
Figure 5â2 shows the transmitter output waveforms for all supported
differential output standards (LVDS, mini-LVDS, RSDS, differential 1.5-V
HSTL class I and II, differential 1.8-V HSTL class I and II, differential
SSTL-2 class I and II, and differential SSTL-18 class I and II).
Figure 5â2. Transmitter Output Waveforms for Differential I/O Standards
Single-Ended Waveform
VOCM (2)
VOD (1)
Positive Channel (p) = VOH
Negative Channel (n) = VOL
Ground
Differential Waveform (Mathematical Function of Positive and Negative Channel)
VOD (1)
0V
VOD (1)
p â n (3)
Notes to Figure 5â2:
(1) VOD is the output differential voltage. VOD = |p â n|.
(2) VOCM is the output common mode voltage. VOCM = (p + n)/2.
(3) The p â n waveform is a function of the positive channel (p) and the negative channel (n).
Table 5â9 shows the DC characteristics for user I/O pins with differential
I/O standards.
Table 5â9. DC Characteristics for User I/O Pins Using Differential I/O Standards Note (1) (Part 1 of 2)
I/O Standard
LVDS
mini-LVDS (2)
RSDS (2)
Differential 1.5-V
HSTL class I
and II (3)
VOD (mV)
ÎVOD (mV)
VOCM (V)
VOH (V)
Min Typ Max Min Max Min Typ Max Min Max
250 â 600 â 50 1.125 1.25 1.375 â â
300 â 600 â 50 1.125 1.25 1.375 â â
100 â 600 â â 1.125 1.25 1.375 â â
â â â ââ â
â
â VC C I O â
â 0.4
VOL (V)
Min Max
ââ
â
â
â
â
â 0.4
5â10
Cyclone II Device Handbook, Volume 1
Altera Corporation
February 2008
|
▷ |