agle600 Actel Corporation, agle600 Datasheet - Page 40

• Manufacturer Part Number: agle600
• Description: Iglooe Low-power Flash Fpgas With Flash*freeze Technology
• Manufacturer: Actel Corporation

IGLOOe DC and Switching Characteristics
Table 2-30 • Short Current Event Duration before Failure
Table 2-31 • Schmitt Trigger Input Hysteresis
Table 2-32 • I/O Input Rise Time, Fall Time, and Related I/O Reliability*
2 -2 8
Input Buffer
LVTTL/LVCMOS (Schmitt trigger
disabled)
LVTTL/LVCMOS (Schmitt trigger
enabled)
HSTL/SSTL/GTL
LVDS/BLVDS/M-LVDS/LVPECL
*
Temperature
–40°C
0°C
25°C
70°C
85°C
100°C
110°C
Input Buffer Configuration
3.3 V LVTTL/LVCMOS/PCI/PCI-X (Schmitt trigger mode)
2.5 V LVCMOS (Schmitt trigger mode)
1.8 V LVCMOS (Schmitt trigger mode)
1.5 V LVCMOS (Schmitt trigger mode)
1.2 V LVCMOS (Schmitt trigger mode)
The maximum input rise/fall time is related to the noise induced into the input buffer trace. If the noise is low,
then the rise time and fall time of input buffers can be increased beyond the maximum value. The longer the
rise/fall times, the more susceptible the input signal is to the board noise. Actel recommends signal integrity
evaluation/characterization of the system to ensure that there is no excessive noise coupling into input signals.
The length of time an I/O can withstand I
reliability data below is based on a 3.3 V, 36 mA I/O setting, which is the worst case for this type of
analysis.
For example, at 110°C, the short current condition would have to be sustained for more than three
months to cause a reliability concern. The I/O design does not contain any short circuit protection,
but such protection would only be needed in extremely prolonged stress conditions.
Hysteresis Voltage Value (Typ.) for Schmitt Mode Input Buffers
Input Rise/Fall Time (min.)
No requirement
No requirement
No requirement
No requirement
A d v a n c e v 0. 3
OSH
/I
OSL
No requirement, but input noise
voltage
hysteresis.
events depends on the junction temperature. The
Input Rise/Fall Time (max.)
cannot
Time before Failure
10 ns*
10 ns*
10 ns*
exceed
> 20 years
> 20 years
> 20 years
6 months
3 months
Hysteresis Value (typ.)
5 years
2 years
Schmitt
240 mV
140 mV
80 mV
60 mV
40 mV
20 years (110°C)
20 years (110°C)
10 years (100°C)
10 years (100°C)
Reliability