EP4CE115 datasheet(41/42 Pages) ALTERA

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Chapter 1: Cyclone IV Device Datasheet

1–41

Glossary

May 2013

Altera Corporation

Cyclone IV Device Handbook,

Volume 3

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 that 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 that 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 that the device considers is

accepted as the minimum positive high level.

VOL

Voltage output low: The maximum positive voltage from an output that 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 the SSTL and HSTL I/O standards.

VREF (AC)

AC input reference voltage for the SSTL and HSTL I/O standards. VREF(AC) = VREF(DC) + noise. The

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

VREF (DC)

DC input reference voltage for the SSTL and 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 the SSTL and HSTL I/O standards.

VX (AC)

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

cross.

——

Table 1–46. Glossary (Part 5 of 5)

Letter

Term

Definitions

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