HC4GX15 Datasheet, PDF (665/668 Pages) Altera Corporation – HardCopy IV Device Handbook

Chapter 1: DC and Switching Characteristics of HardCopy IV Devices
1–35
Glossary
Table 1–39. Glossary Table (Part 4 of 4)
Letter
Subject
Definitions
VCM (D C)
DC common mode input voltage.
VIC M
Input common mode voltage: The common mode of the differential signal at the receiver.
V_ID
Input differential voltage swing: The difference in voltage between the positive and
complementary conductors of a differential transmission at the receiver.
V_{DIF (AC )}
AC differential input voltage: Minimum AC input differential voltage required for switching.
VDIF (DC)
DC differential input voltage: Minimum DC input differential voltage required for switching.
V_IH
Voltage input high: The minimum positive voltage applied to the input that is accepted by the
device as a logic high.
V_{IH ( AC )}
High-level AC input voltage
VIH ( DC)
V
V_IL
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.
V_{IL( AC)}
VIL( DC)
V_OCM
Low-level AC input voltage
Low-level DC input voltage
Output common mode voltage: The common mode of the differential signal at the
transmitter.
V_OD
Output differential voltage swing: The difference in voltage between the positive and
complementary conductors of a differential transmission at the transmitter.
V_SWING
Differential input voltage
VX
Input differential cross point voltage
VOX
Output differential cross point voltage
WW
HIGH-SPEED I/O BLOCK: Clock boost factor
X
—
—
Y
—
—
Z
—
—
© June 2009 Altera Corporation
HardCopy IV Device Handbook Volume 4