Arria® V Device Handbook: Volume 1: Device Interfaces and Integration
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5.9.1. RS OCT without Calibration in Arria® V Devices
The Arria® V devices support RS OCT for single-ended and voltage-referenced I/O standards. RS OCT without calibration is supported on output only.
I/O Standard | Device Variant Support | Uncalibrated OCT (Output) |
---|---|---|
RS (Ω) | ||
3.3 V LVTTL/3.3 V LVCMOS | GZ only | 25/50 |
3.0 V LVTTL/3.0 V LVCMOS | GX, GT, SX, and ST | 25/50 |
2.5 V LVCMOS | All | 25/50 |
1.8 V LVCMOS | All | 25/50 |
1.5 V LVCMOS | All | 25/50 |
1.2 V LVCMOS | All | 25/50 |
SSTL-2 Class I | All | 50 |
SSTL-2 Class II | All | 25 |
SSTL-18 Class I | All | 50 |
SSTL-18 Class II | All | 25 |
SSTL-15 Class I | All | 50 |
SSTL-15 Class II | All | 25 |
1.8 V HSTL Class I | All | 50 |
1.8 V HSTL Class II | All | 25 |
1.5 V HSTL Class I | All | 50 |
1.5 V HSTL Class II | All | 25 |
1.2 V HSTL Class I | All | 50 |
1.2 V HSTL Class II | All | 25 |
Differential SSTL-2 Class I | All | 50 |
Differential SSTL-2 Class II | All | 25 |
Differential SSTL-18 Class I | All | 50 |
Differential SSTL-18 Class II | All | 25 |
Differential SSTL-15 Class I | All | 50 |
Differential SSTL-15 Class II | All | 25 |
Differential 1.8 V HSTL Class I | All | 50 |
Differential 1.8 V HSTL Class II | All | 25 |
Differential 1.5 V HSTL Class I | All | 50 |
Differential 1.5 V HSTL Class II | All | 25 |
Differential 1.2 V HSTL Class I | All | 50 |
Differential 1.2 V HSTL Class II | All | 25 |
SSTL-15 | GZ only | 25, 34, 40, 50 |
SSTL-135 | GZ only | 34, 40 |
SSTL-125 | GZ only | 34, 40 |
SSTL-12 | GZ only | 40, 60, 240 |
HSUL-12 | GZ only | 34.3, 40, 48, 60, 80 |
Driver-impedance matching provides the I/O driver with controlled output impedance that closely matches the impedance of the transmission line. As a result, you can significantly reduce signal reflections on PCB traces.
If you select matching impedance, current strength is no longer selectable.