Altera Cyclone IV Device Handbook page 487

Chapter 1: Cyclone IV Device Datasheet
Glossary
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
OD
V
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 —
X —
Y —
Z —
December 2016 Altera Corporation
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
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 = (V
OS
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
peak-to-peak AC noise on V
REF
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.
Definitions
+ V ) / 2.
OH OL
must not exceed 2% of V
REF(DC)
—
—
—
—
= V – V
OD OH OL
= V + noise. The
REF(AC) REF(DC)
.
Cyclone IV Device Handbook,
Volume 3
1–41
.