STRATIX family comparison (novice).

[Altera_Forum]

Hello, 

 (Sorry for my weak english :o)   I'm new to the FPGA devices and as a part of my internship, I have to do a "comparison study" about Stratix FPGAs (II, III, IV) regarding features, size, performances... So I started by reading respective Device Handbook and the Product Catalogue in which I found a lot of informations but I didn't manage to find some informations such as:

• 3.3V LVTTL I/O Max Frequency 
• ALUT+DFF or ALM Minimum propagation delay (or Max Frequency)

I'm still a novice in this domain so I don't know if my questions are relevant or not, but I will be grateful for any advice or suggestion.  Thanks,  Amiin

[Altera_Forum]

I didn't look at all the products, but there should be some IO timing specification for all products. Stratix IV IO for example, the timing is specified in an excel spreadsheet "StratixIV_IO_timing_QII9p0.xls". It is at the bottom of the documentation "get literature (http://www.altera.com/literature/lit-stratix-iv.jsp)" page. 

 Actually, the volume 4 contains more useful information FMAX generalization. This is from Stratux IV:  I/O performance supports several system interfaces, such as the LVDS high-speed I/O interface, external memory interface, and the PCI/PCI-X bus interface. For example, Stratix IV device I/Os configured with voltage referenced I/O standards can achieve up to the stated system interfacing speeds as indicated in “External Memory Interface Specifications” on page 1–33. general-purpose i/o standards such as 3.3, 2.5, 1.8, and 1.5 lvttl/lvcmos are capable of typical 167 mhz and 1.2 lvcmos at 100mhz interfacing frequency with 10pf load.

[Altera_Forum]

Thank you Kito, 

This spreadsheet will be very useful for me :) I will see if the same spreadsheet exists for Statix 3

[Altera_Forum]

hi, 

 I still have some question, someone could enlighten me please?  It is written in Stratix 3 and Stratix 4 Handbook that:    --- Quote Start ---  general-purpose i/o standards such as 3.3, 2.5, 1.8, and 1.5 lvttl/lvcmos are capable of typical 167 mhz and 1.2 lvcmos at 100mhz interfacing frequency with 10pf load.  --- Quote End ---  but I didn't find the equivalent information for Stratix 2. I want this information in order to compare 3.3v lvttl pins data rates for the different FPGAs of the STRATIX family.  Thank you,  Amin