Note: Make sure you check the “I have read and accepted the licensing terms and conditions” box to download the list of models, Package RLC Values, and IBIS Model shown in the table.
The user guide for each family or the ibs file itself should contain an IO standard naming nomenclature decode section that helps explain each option for our IO standard and associated options.
Here is an example from our Arria 10 IBIS Models User Guide found inside the arria10.zip file shown in Table 1. IBIS Models for Intel Devices
3.0 NAMING NOMENCLATURE All models follow the following naming method: <I/O Standard>_<I/O>_<Features> where, <I/O Standard> refers to: 12 - 1.2V-LVCMOS 15 - 1.5V-LVCMOS 18 - 1.8V-LVCMOS 25 - 2.5V-LVCMOS lvcmos30 - 3.0V-LVCMOS lvttl30 - 3.0V-LVTTL dsstl135i - Differential SSTL-135 Class I dsstl135ii - Differential SSTL-135 Class II dsstl125i - Differential SSTL-125 Class I dsstl125ii - Differential SSTL-125 Class II dsstl12i - Differential SSTL-12 Class I dsstl12ii - Differential SSTL-12 Class II dhstl12i - Differential HSTL-12 Class I dhstl12ii - Differential HSTL-12 Class II dhstl15i - Differential HSTL-15 Class I dhstl15ii - Differential HSTL-15 Class II dhstl18i - Differential HSTL-18 Class I dhstl18ii - Differential HSTL-18 Class II dhsul12 - Differential HSUL-12 dpod12 - Differential POD-12 dsstl12 - Differential SSTL-12 dsstl125 - Differential SSTL-125 dsstl135 - Differential SSTL-135 dsstl15 - Differential SSTL-15 dsstl15i - Differential SSTL-15 Class I dsstl15ii - Differential SSTL-15 Class II dsstl18i - Differential SSTL-18 Class I dsstl18ii - Differential SSTL-18 Class II hstl12i - HSTL-12 Class I hstl12ii - HSTL-12 Class II hstl15i - HSTL-15 Class I hstl15ii - HSTL-15 Class II hstl18i - HSTL-18 Class I hstl18ii - HSTL-18 Class II hsul12 - HSUL-12 lvds - 1.8V LVDS lvpecl - 1.8V LVPECL minilvds - 1.8V mini-LVDS pod12 - 1.2V POD rsds - 1.8V RSDS sstl135i - SSTL-135 Class I sstl135ii - SSTL-135 Class II sstl125i - SSTL-125 Class I sstl125ii - SSTL-125 Class II sstl12i - SSTL-12 Class I sstl12ii - SSTL-12 Class II sstl12 - SSTL-12 sstl125 - SSTL-125 sstl135 - SSTL-135 sstl15 - SSTL-15 sstl15i - SSTL-15 Class I sstl15ii - SSTL-15 Class II sstl18i - SSTL-18 Class I sstl18ii - SSTL-18 Class II
<I/O> refers to: Column I/O Bank (Begins with Letter 'r'): rtin - Row input, DIFFIO pin (optional Pin Function) rtio - Row I/O, DIFFIO pin (optional Pin Function) rto - Row output, DIFFIO pin (optional Pin Function)
<Features> refers to: s0 - slow Slew Rate s1 - fast Slew Rate d12 - 12mA Current Strength r25 - 25ohm series on-chip Termination without Calibration r50c - 50ohm series on-chip Termination with Calibration g50c - 50ohm parallel on-chip Termination with Calibration p0 - pre-emphasis disabled p1 - pre-emphasis enabled t100 - 100-Ohms Differential OCT v0 - low VOD v1 - medium low VOD v2 - medium high VOD v3 - high VOD lv - low voltage (model for non-3V I/O bank supply) hv - high voltage (model for 3V I/O bank supply)
Example: 12_rtio_d2s1_lv refers to 1.2V LVCMOS I/O standard with 2mA drive strength, and fast slew rate setting on row I/O, differential I/O pins that does not support 3V I/O supply.