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EP3SE80 Datasheet(PDF) 17 Page - Altera Corporation

Part No. EP3SE80
Description  Stratix III Device Handbook, Volume 2
Download  341 Pages
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Maker  ALTERA [Altera Corporation]
Homepage  http://www.altera.com
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EP3SE80 Datasheet(HTML) 17 Page - Altera Corporation

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Chapter 1: Stratix III Device Datasheet: DC and Switching Characteristics
1–7
Electrical Characteristics
© July 2010
Altera Corporation
Stratix III Device Handbook, Volume 2
The accuracy listed in Table 1–7 is valid at the time of calibration. If the voltage or
temperature changes, the termination resistance value varies. Table 1–8 lists the
resistance tolerance for Stratix III OCT.
Table 1–9 lists OCT variation with temperature and voltage after power-up
calibration. Use Table 1–9 and Equation 1–1 to determine OCT variation without
re-calibration.
Table 1–8. On-Chip Termination Resistance Tolerance Specification for Stratix III Devices
Symbol
Description
Conditions
Resistance Tolerance
Unit
C2
C3, I3
C4, I4
R
OCT_UNCAL
Internal series termination without
calibration
25-
 R
S 3.3, 3.0, 2.5
Internal series termination without
calibration (25-
 setting)
V
CCIO = 3.3, 3.0, 2.5 V
±30
±40
±40
%
25-
 R
S 1.8, 1.5
Internal series termination without
calibration (25-
 setting)
V
CCIO = 1.8, 1.5 V
±30
±50
±50
%
25-
 R
S 1.2
Internal series termination without
calibration (25-
 setting)
V
CCIO = 1.2 V
±35
±60
±60
%
50-
 R
S 3.3, 3.0, 2.5
Internal series termination without
calibration (50-
 setting)
V
CCIO = 3.3, 3.0, 2.5 V
±30
±40
±40
%
50-
 R
S 1.8, 1.5
Internal series termination without
calibration (50-
 setting)
V
CCIO = 1.8, 1.5 V
±30
±50
±50
%
50-
 R
S 1.2
Internal series termination without
calibration (50-
 setting)
V
CCIO = 1.2 V
±35
±60
±60
%
R
D
Internal differential termination for
LVDS technology (100-
setting)
V
CCIO = 2.5 V
-15 to 35
%
Equation 1–1. OCT Variation Without Re-Calibration (Note 1)
Notes to Equation 1–1:
(1) ROCT value calculated from Equation 1–1 shows the range of OCT resistance with the variation of temperature and
VCCIO.
(2) RSCAL is the OCT resistance value at power-up.
(3)
T is the variation of temperature with respect to the temperature at power-up.
(4)
V is the variation of voltage with respect to the V
CCIO 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.
R
OCT
R
SCAL 1
dR
dT
-------
T

dR
dV
-------
V

+


=


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