EP4CE55F29C6N Datasheet, PDF (41/42 Pages) Altera Corporation – Cyclone IV Device Datasheet

Chapter 1: Cyclone IV Device Datasheet
Glossary
1–41
Table 1–46. Glossary (Part 5 of 5)
Letter
Term
V_CM(DC)
V_DIF(AC)
V_DIF(DC)
V_ICM
V_ID
V_IH
V_IH(AC)
V_IH(DC)
V_IL
V_{IL (AC)}
V_{IL (DC)}
V_IN
V_OCM
V
V_OD
V_OH
V_OL
V_OS
V_{OX (AC)}
V_REF
V_{REF (AC)}
V_{REF (DC)}
V_{SWING (AC)}
V_{SWING (DC)}
V_TT
V_{X (AC)}
W
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X
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Y
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Z
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Definitions
DC common mode input voltage.
AC differential input voltage: The minimum AC input differential voltage required for switching.
DC differential input voltage: The minimum DC input differential voltage required for switching.
Input common mode voltage: The common mode of the differential signal at the receiver.
Input differential voltage swing: The difference in voltage between the positive and
complementary conductors of a differential transmission at the receiver.
Voltage input high: The minimum positive voltage applied to the input that is accepted by the
device as a logic high.
High-level AC input voltage.
High-level DC input voltage.
Voltage input low: The maximum positive voltage applied to the input that is accepted by the
device as a logic low.
Low-level AC input voltage.
Low-level DC input voltage.
DC input voltage.
Output common mode voltage: The common mode of the differential signal at the transmitter.
Output differential voltage swing: The difference in voltage between the positive and
complementary conductors of a differential transmission at the transmitter. V_OD = V_OH – V_OL.
Voltage output high: The maximum positive voltage from an output that the device considers is
accepted as the minimum positive high level.
Voltage output low: The maximum positive voltage from an output that the device considers is
accepted as the maximum positive low level.
Output offset voltage: V_OS = (V_OH + V_OL) / 2.
AC differential output cross point voltage: the voltage at which the differential output signals
must cross.
Reference voltage for the SSTL and HSTL I/O standards.
AC input reference voltage for the SSTL and HSTL I/O standards. V_REF(AC) = V_REF(DC) + noise. The
peak-to-peak AC noise on V_REF must not exceed 2% of V_REF(DC).
DC input reference voltage for the SSTL and HSTL I/O standards.
AC differential input voltage: AC input differential voltage required for switching. For the SSTL
differential I/O standard, refer to Input Waveforms.
DC differential input voltage: DC input differential voltage required for switching. For the SSTL
differential I/O standard, refer to Input Waveforms.
Termination voltage for the SSTL and HSTL I/O standards.
AC differential input cross point voltage: The voltage at which the differential input signals must
cross.
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December 2013 Altera Corporation
Cyclone IV Device Handbook,
Volume 3