AGLN250V2-ZCSG81 Actel, AGLN250V2-ZCSG81 Datasheet - Page 38

• Manufacturer Part Number: AGLN250V2-ZCSG81
• Manufacturer: Actel

IGLOO nano DC and Switching Characteristics
2 -2 4
The length of time an I/O can withstand I
reliability data below is based on a 3.3 V, 8 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.
Table 2-30 • Duration of Short Circuit Event before Failure
Table 2-31 • Schmitt Trigger Input Hysteresis
Table 2-32 • I/O Input Rise Time, Fall Time, and Related I/O Reliability
Temperature
–40°C
–20°C
0°C
25°C
70°C
85°C
100°C
110°C
Input Buffer Configuration
3.3 V LVTTL / LVCMOS (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)
Input Buffer
LVTTL/LVCMOS (Schmitt trigger
disabled)
LVTTL/LVCMOS (Schmitt trigger
enabled)
*
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.
Hysteresis Voltage Value (Typ.) for Schmitt Mode Input Buffers
Input Rise/Fall Time
No requirement
No requirement
A d v a n c e v 0. 3
(min.)
OSH
/I
OSL
events depends on the junction temperature. The
No requirement, but
Input Rise/Fall Time
input noise voltage
Schmitt hysteresis.
cannot exceed
10 ns *
(max.)
Time before Failure
> 20 years
> 20 years
> 20 years
> 20 years
6 months
3 months
5 years
2 years
Hysteresis Value (typ.)
240 mV
140 mV
80 mV
60 mV
40 mV
20 years (100°C)
20 years (100°C)
Reliability