EP4CE40F23I7N FBGA-484 Altera good price
or I8L. Automotive devices are indicated as A7.
Operating Conditions
When Cyclone IV devices are implemented in a system, they are rated according to a
set of defined parameters. To maintain the highest possible performance and
reliability of Cyclone IV devices, you must consider the operating requirements
described in this chapter.
Cyclone IV devices are offered in commercial, industrial, extended industrial and,
automotive grades. Cyclone IV E devices offer –6 (fastest), –7, –8, –8L, and –9L speed
grades for commercial devices, –8L speed grades for industrial devices, and –7 speed
grade for extended industrial and automotive devices. Cyclone IV GX devices offer
–6 (fastest), –7, and –8 speed grades for commercial devices and –7 speed grade for
industrial devices.
f For more information about the supported speed grades for respective Cyclone IV
devices, refer to the Cyclone IV FPGA Device Family Overview chapter.
1 Cyclone IV E devices are offered in core voltages of 1.0 and 1.2 V. Cyclone IV E
devices with a core voltage of 1.0 V have an ‘L’ prefix attached to the speed grade.
In this chapter, a prefix associated with the operating temperature range is attached to
the speed grades; commercial with a “C” prefix, industrial with an “I” prefix, and
automotive with an “A” prefix. Therefore, commercial devices are indicated as C6, C7,
C8, C8L, or C9L per respective speed grade. Industrial devices are indicated as I7, I8,
Cyclone IV E industrial devices I7 are offered with extended operating temperature
range.
Absolute Maximum Ratings
Absolute maximum ratings define the maximum operating conditions for Cyclone IV
devices. The values are based on experiments conducted with the device and
theoretical modeling of breakdown and damage mechanisms. The functional
operation of the device is not implied at these conditions. Table 1–1 lists the absolute
maximum ratings for Cyclone IV devices.
c Conditions beyond those listed in Table 1–1 cause permanent damage to the device.
Additionally, device operation at the absolute maximum ratings for extended periods
of time have adverse effects on the device.
Maximum Allowed Overshoot or Undershoot Voltage
During transitions, input signals may overshoot to the voltage shown in Table 1–2 and
undershoot to –2.0 V for a magnitude of currents less than 100 mA and for periods
shorter than 20 ns. Table 1–2 lists the maximum allowed input overshoot voltage and
the duration of the overshoot voltage as a percentage over the lifetime of the device.
The maximum allowed overshoot duration is specified as a percentage of high-time
over the lifetime of the device.
A DC signal is equivalent to 100% duty cycle. For example, a signal that overshoots to
4.3 V can only be at 4.3 V for 65% over the lifetime of the device; for a device lifetime
of 10 years, this amounts to 65/10ths of a year.