EP2C8Q208C6 Datasheet, PDF (100/168 Pages) Altera Corporation – Section I. Cyclone II Device Family Data Sheet

Operating Conditions
Figure 5–2 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 5–2. Transmitter Output Waveforms for Differential I/O Standards
Single-Ended Waveform
V_OCM (2)
V_OD (1)
Positive Channel (p) = V_OH
Negative Channel (n) = V_OL
Ground
Differential Waveform (Mathematical Function of Positive and Negative Channel)
V_OD (1)
0V
V_OD (1)
p − n (3)
Notes to Figure 5–2:
(1) V_OD is the output differential voltage. V_OD = |p – n|.
(2) V_OCM is the output common mode voltage. V_OCM = (p + n)/2.
(3) The p – n waveform is a function of the positive channel (p) and the negative channel (n).
Table 5–9 shows the DC characteristics for user I/O pins with differential
I/O standards.
Table 5–9. 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)
V_OD (mV)
ΔV_OD (mV)
V_OCM (V)
V_OH (V)
Min Typ Max Min Max Min Typ Max Min Max
250 — 600 — 50 1.125 1.25 1.375 — —
300 — 600 — 50 1.125 1.25 1.375 — —
100 — 600 — — 1.125 1.25 1.375 — —
— — — —— —
—
— V_{C C I O} —
– 0.4
V_OL (V)
Min Max
——
—
—
—
—
— 0.4
5–10
Cyclone II Device Handbook, Volume 1
Altera Corporation
February 2008