2–8
Chapter 2: Device Datasheet for Cyclone V Devices
Electrical Characteristics
Table 2–9 lists the Cyclone V OCT without calibration resistance tolerance to PVT
changes.
Table 2–9. OCT Without Calibration Resistance Tolerance Specifications for Cyclone V Devices—Preliminary
Resistance Tolerance
Symbol
Description
Conditions (V)
Unit
C6
C7, I7
C8, A7
Speed Grade Speed Grade Speed Grade
Internal series termination
without calibration
(25-Ω setting)
25-Ω RS
VCCIO = 3.0 and 2.5
VCCIO = 1.8 and 1.5
VCCIO = 1.2
30
30
35
30
30
35
25
40
40
40
40
%
%
%
%
%
%
%
Internal series termination
without calibration
(25-Ω setting)
25-Ω RS
25-Ω RS
50-Ω RS
50-Ω RS
50-Ω RS
100-Ω RD
Internal series termination
without calibration
(25-Ω setting)
50
50
Internal series termination
without calibration (50-Ω
setting)
VCCIO = 3.0 and 2.5
VCCIO = 1.8 and 1.5
VCCIO = 1.2
40
40
Internal series termination
without calibration
(50-Ω setting)
40
40
Internal series termination
without calibration
(50-Ω setting)
50
50
Internal differential
termination (100-Ω
setting)
VCCIO = 2.5
TBD
TBD
OCT calibration is automatically performed at power up for the OCT-enabled I/O
pins. Table 2–10 lists OCT variation with temperature and voltage after power-up
calibration. Use Table 2–10 to determine the OCT variation after power-up calibration
and Equation 2–1 to determine the OCT variation without recalibration.
Equation 2–1. OCT Variation Without Recalibration—Preliminary (1), (2), (3), (4), (5), (6)
dR
dT
dR
dV
------
-------
× ΔV
ROCT = R
1 +
× ΔT
SCAL
Notes to Equation 2–1:
(1) The ROCT value calculated from Equation 2–1 shows the range of OCT resistance with the variation of temperature
and VCCIO
.
(2) RSCAL is the OCT resistance value at power-up.
(3) ΔT is the variation of temperature with respect to the temperature at power up.
(4) ΔV is the variation of voltage with respect to VCCIO at power up.
(5) dR/dT is the percentage change of RSCAL with temperature.
(6) dR/dV is the percentage change of RSCAL with voltage.
Cyclone V Device Handbook
February 2012 Altera Corporation
Volume 1: Device Overview and Datasheet
ALTERA [ ALTERA CORPORATION ]
