Timing Specifications
You should select power supplies and regulators that can supply the
amount of current required when designing with Cyclone II devices.
Altera recommends using the Cyclone II PowerPlay Early Power
Estimator to estimate the user-mode ICCINT consumption and then select
power supplies or regulators based on the values obtained.
The DirectDrive™ technology and MultiTrack™ interconnect ensure
predictable performance, accurate simulation, and accurate timing
analysis across all Cyclone II device densities and speed grades. This
section describes and specifies the performance, internal, external,
high-speed I/O, JTAG, and PLL timing specifications.
Timing
Specifications
This section shows the timing models for Cyclone II devices. Commercial
devices meet this timing over the commercial temperature range.
Industrial devices meet this timing over the industrial temperature range.
Automotive devices meet this timing over the automotive temperature
range. Extended devices meet this timing over the extended temperature
range. All specifications are representative of worst-case supply voltage
and junction temperature conditions.
Preliminary and Final Timing Specifications
Timing models can have either preliminary or final status. The Quartus II
software issues an informational message during the design compilation
if the timing models are preliminary. Table 5–14 shows the status of the
Cyclone II device timing models.
Preliminary status means the timing model is subject to change. Initially,
timing numbers are created using simulation results, process data, and
other known parameters. These tests are used to make the preliminary
numbers as close to the actual timing parameters as possible.
5–14
Altera Corporation
Cyclone II Device Handbook, Volume 1
February 2008
ALTERA [ ALTERA CORPORATION ]
