AFS250-FGG256 Actel, AFS250-FGG256 Datasheet - Page 163

• Manufacturer Part Number: AFS250-FGG256
• Description: FPGA - Field Programmable Gate Array 250K System Gates
• Manufacturer: Actel

Specifications of AFS250-FGG256

• Processor Series: AFS250
• Core: IP Core
• Maximum Operating Frequency: 1098.9 MHz
• Number Of Programmable I/os: 114
• Data Ram Size: 36864
• Supply Voltage (max): 1.575 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Development Tools By Supplier: AFS-Eval-Kit, AFS-BRD600, FlashPro 3, FlashPro Lite, Silicon-Explorer II, Silicon-Sculptor 3, SI-EX-TCA
• Mounting Style: SMD/SMT
• Supply Voltage (min): 1.425 V
• Number Of Gates: 250 K
• Package / Case: FPBGA-256
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Temporary overshoots are allowed according to
Figure 2-101 • Solution 1
Solution 2
The board-level design must ensure that the reflected waveform at the pad does not exceed limits
provided in
This scheme will also work for a 3.3 V PCI/PCI-X configuration, but the internal diode should not be used
for clamping, and the voltage must be limited by the external resistors and Zener, as shown in
102. Relying on the diode clamping would create an excessive pad DC voltage of 3.3 V + 0.7 V = 4 V.
Figure 2-102 • Solution 2
Table 3-4 on page
5.5 V
3-4. This is a long-term reliability requirement.
Zener 3.3 V diode, LVCMOS 3.3 V I/Os
5.5 V
Rext1
Zener
3.3 V
Off-Chip
Requires one board resistor, one
Off-Chip
Rext1
Rext2
Requires two board resistors,
Solution 2
R e v i s i o n 1
LVCMOS 3.3 V I/Os
Solution 1
Table 3-4 on page
On-Chip
On-Chip
Fusion I/O Input
Fusion I/O Input
Actel Fusion Family of Mixed Signal FPGAs
3-4.
3.3 V
3.3 V
Figure 2-
2- 147