EP2AGX95EF29C6N Datasheet, PDF (195/380 Pages) Altera Corporation – Device Interfaces and Integration

Chapter 6: I/O Features in Arria II Devices
Termination Schemes for I/O Standards
6–31
Figure 6–14 shows the details of differential HSTL I/O standard termination on
Arria II devices.
Figure 6–14. Differential HSTL I/O Standard Termination for Arria II Devices
Termination
External
On-Board
Termination
Transmitter
HSTL Class I
VTT VTT
50 Ω
50 Ω
50 Ω
50 Ω
Receiver
HSTL Class II
Transmitter
VTT VTT
VTT VTT
50 Ω
50 Ω 50 Ω
50 Ω
50 Ω
50 Ω
Receiver
RS OCT for
Arria II GX
Devices
HSTL Class I
Series OCT 50 Ω
Transmitter
VTT
50 Ω
Z0= 50 Ω
VTT
Z0= 50 Ω
50 Ω
Receiver
HSTL Class II
Series OCT 25 
Transmitter
VTT
VTT
50 Ω
50 Ω
Z0= 50 Ω
VTT
VTT
50 Ω
50 Ω
Z0= 50 Ω
Receiver
Differential HSTL Class I
Series OCT 50 Ω
RS OCT and
RT OCT for
Arria II GZ
Devices
Transmitter
Z0= 50 
Z0= 50 
VCCIO
100 
Parallel OCT
100 
100  _VCCIO
GND
100 
100 
GND
Receiver
Differential HSTL Class II
Series OCT 25 Ω
VTT
50 
Z0= 50 
VTT
50 
Z0= 50 
Transmitter
VCCIO
100 
Parallel OCT
100 
100 
VCCIO
GND
100 
100 
GND
Receiver
December 2011 Altera Corporation
Arria II Device Handbook Volume 1: Device Interfaces and Integration