3.3-VLVCMOS datasheet(31/34 Pages) ALTERA

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Chapter 1: Cyclone III Device Datasheet

1–31

Glossary

July 2012

Altera Corporation

Cyclone III Device Handbook

Volume 2

VCM(DC)

DC Common Mode Input Voltage.

VDIF(AC)

AC differential Input Voltage: The minimum AC input differential voltage required for switching.

VDIF(DC)

DC differential Input Voltage: The minimum DC input differential voltage required for switching.

VICM

Input Common Mode Voltage: The common mode of the differential signal at the receiver.

VID

Input differential Voltage Swing: The difference in voltage between the positive and

complementary conductors of a differential transmission at the receiver.

VIH

Voltage Input High: The minimum positive voltage applied to the input which is accepted by the

device as a logic high.

VIH(AC)

High-level AC input voltage.

VIH(DC)

High-level DC input voltage.

VIL

Voltage Input Low: The maximum positive voltage applied to the input which is accepted by the

device as a logic low.

VIL (AC)

Low-level AC input voltage.

VIL (DC)

Low-level DC input voltage.

VIN

DC input voltage.

VOCM

Output Common Mode Voltage: The common mode of the differential signal at the transmitter.

VOD

Output differential Voltage Swing: The difference in voltage between the positive and

complementary conductors of a differential transmission at the transmitter. VOD = VOH – VOL.

VOH

Voltage Output High: The maximum positive voltage from an output which the device considers is

accepted as the minimum positive high level.

VOL

Voltage Output Low: The maximum positive voltage from an output which the device considers is

accepted as the maximum positive low level.

VOS

Output offset voltage: VOS = (VOH + VOL) / 2.

VOX (AC)

AC differential Output cross point voltage: The voltage at which the differential output signals must

cross.

VREF

Reference voltage for SSTL, HSTL I/O Standards.

VREF (AC)

AC input reference voltage for SSTL, HSTL I/O Standards. VREF(AC) = VREF(DC) + noise. The

peak-to-peak AC noise on VREF should not exceed 2% of VREF(DC).

VREF (DC)

DC input reference voltage for SSTL, HSTL I/O Standards.

VSWING (AC)

AC differential Input Voltage: AC Input differential voltage required for switching. For the SSTL

Differential I/O Standard, refer to Input Waveforms.

VSWING (DC)

DC differential Input Voltage: DC Input differential voltage required for switching. For the SSTL

Differential I/O Standard, refer to Input Waveforms.

VTT

Termination voltage for SSTL, HSTL I/O Standards.

VX (AC)

AC differential Input cross point Voltage: The voltage at which the differential input signals must

cross.

——

Table 1–39. Glossary (Part 5 of 5)

Letter

Term

Definitions

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