Single-Ended I/O Termination - Altera Cyclone V Device Handbook

CV-52005
2014.01.10
Differential 1.8 V HSTL Class I
Differential 1.8 V HSTL Class II
Differential 1.5 V HSTL Class I
Differential 1.5 V HSTL Class II
Differential 1.2 V HSTL Class I
Differential 1.2 V HSTL Class II
LVDS
RSDS
Mini-LVDS
LVPECL
SLVS
(14)
SSTL-15
(14)
SSTL-135
(14)
SSTL-125
HSUL-12
Differential SSTL-15
Differential SSTL-135
Differential SSTL-125
Differential HSUL-12

Single-ended I/O Termination

Voltage-referenced I/O standards require an input V
voltage of the receiving device tracks the termination voltage of the transmitting device.
The supported I/O standards such as SSTL-125, SSTL-135, and SSTL-15 typically do not require external
board termination.
Altera recommends that you use dynamic OCT with these I/O standards to save board space and cost.
Dynamic OCT reduces the number of external termination resistors used.
Note: You cannot use R
information.
(14)
Altera recommends that you use dynamic OCT with these I/O standards to save board space and cost. Dynamic
OCT reduces the number of external termination resistors used.
I/O Features in Cyclone V Devices
Send Feedback
I/O Standard
(14)
(14)
(14)
and R OCT simultaneously. For more information, refer to the related
S T
Single-ended I/O Termination
External Termination Scheme
Differential HSTL I/O Standard Termination
LVDS I/O Standard Termination
RSDS/mini-LVDS I/O Standard Termination
Differential LVPECL I/O Standard Termination
SLVS I/O Standard Termination
No external termination required
and a termination voltage (V
REF
5-45
). The reference
TT
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