EP4SE360F35I4 Datasheet, PDF (215/432 Pages) Altera Corporation – This section provides a complete overview of all features relating to the Stratix IV device family, which is the most architecturlly advanced

Chapter 6: I/O Features in Stratix IV Devices
Termination Schemes for I/O Standards
6–41
Differential I/O Standards Termination
Stratix IV devices support differential SSTL-18 and SSTL-2, differential HSTL-18,
HSTL-15, HSTL-12, LVDS, LVPECL, RSDS, and mini-LVDS. Figure 6–29 through
Figure 6–35 show the details of various differential I/O terminations on these devices.
1 Differential HSTL and SSTL outputs are not true differential outputs. They use two
single-ended outputs with the second output programmed as inverted.
Figure 6–29. Differential SSTL I/O Standard Termination
Termination
Differential SSTL Class I
External
On-Board
Termination
Transmitter
VTT VTT
25 Ω
50 Ω
50 Ω
25 Ω
50 Ω
50 Ω
Receiver
Differential SSTL Class II
Transmitter
VTT VTT
VTT VTT
50 Ω
25 Ω
50 Ω 50 Ω
50 Ω
50 Ω
25 Ω
50 Ω
Receiver
OCT
Differential SSTL Class I
Series OCT 50 Ω
Transmitter
VCCIO
Z0= 50 Ω
Z0= 50 Ω
100 Ω
100 Ω
GND ^VCCIO
100 Ω
100 Ω
GND
Receiver
Differential SSTL Class II
Series OCT 25 Ω
VTT
50 Ω
Z0= 50 Ω
VTT
50 Ω
Z0= 50 Ω
Transmitter
VCCIO
100 Ω
100 Ω
VCCIO
GND
100 Ω
100 Ω
GND
Receiver
September 2012 Altera Corporation
Stratix IV Device Handbook
Volume 1