EP2C8 datasheet(100/168 Pages) ALTERA

100 / 168 page

5–10

Altera Corporation

Cyclone II Device Handbook, Volume 1

February 2008

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

Notes to Figure 5–2:

(1)

VOD is the output differential voltage. VOD = |p – n|.

(2)

VOCM is the output common mode voltage. VOCM = (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.

Single-Ended Waveform

Differential Waveform (Mathematical Function of Positive and Negative Channel)

Positive Channel (p) = VOH

Negative Channel (n) = VOL

Ground

VOD (1)

0 V

VOCM (2)

− n (3)

Table 5–9. DC Characteristics for User I/O Pins Using Differential I/O Standards Note (1) (Part 1 of 2)

I/O Standard

VOD (mV)

ΔVOD (mV)

VOCM (V)

VOH (V)

VOL (V)

Min

Typ

Max

Min Max

Min

Typ

Max

Min

Max

Min

Max

LVDS

250

—

600

—

1.125

1.25

1.375

—

mini-LVDS (2)

300

—

600

—

1.125

1.25

1.375

—

RSDS (2)

100

—

600

—

1.125

1.25

1.375

—

Differential 1.5-V

HSTL class I

and II (3)

———

—

VCCI O

– 0.4

——

0.4

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