Stratix II and Stratix II GX I/O Standards Support
general-purpose, single-ended standard used for 3.3-V applications. This
I/O standard does not require input reference voltages (VREF) or
termination voltages (VTT).
1
Stratix II and Stratix II GX devices support both input and
output levels for 3.3-V LVTTL operation.
Stratix II Stratix II GX devices support a VCCIO voltage level of 3.3 V 5%
as specified as the narrow range for the voltage supply by the
EIA/JEDEC standard.
LVCMOS
The LVCMOS standard is formulated under EIA/JEDEC Standard,
JESD8-B (Revision of JESD8-A): Interface Standard for Nominal
3-V/3.3-V Supply Digital Integrated Circuits.
The standard defines DC interface parameters for digital circuits
operating from a 3.0- or 3.3-V power supply and driving or being driven
by LVCMOS-compatible devices. The 3.3-V LVCMOS I/O standard is a
general-purpose, single-ended standard used for 3.3-V applications.
While LVCMOS has its own output specification, it specifies the same
input voltage requirements as LVTTL. These I/O standards do not
require VREF or VTT.
1
Stratix II and Stratix II GX devices support both input and
output levels for 3.3-V LVCMOS operation.
Stratix II and Stratix II GX devices support a VCCIO voltage level of
3.3 V 5% as specified as the narrow range for the voltage supply by the
EIA/JEDEC standard.
2.5 V
The 2.5-V I/O standard is formulated under EIA/JEDEC Standard,
EIA/JESD8-5: 2.5-V 0.2-V (Normal Range), and 1.8-V – 2.7-V (Wide
Range) Power Supply Voltage and Interface Standard for
Non-Terminated Digital Integrated Circuit.
The standard defines the DC interface parameters for high-speed,
low-voltage, non-terminated digital circuits driving or being driven by
other 2.5-V devices. This standard is a general-purpose, single-ended
standard used for 2.5-V applications. It does not require the use of a VREF
or a VTT.
4–4
Stratix II Device Handbook, Volume 2
Altera Corporation
January 2008
ALTERA [ ALTERA CORPORATION ]
