EP3SL110F1152C2N Datasheet, PDF (17/341 Pages) Altera Corporation – Stratix III Device Handbook,

Chapter 1: Stratix III Device Datasheet: DC and Switching Characteristics
1–7
Electrical Characteristics
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 1–8. On-Chip Termination Resistance Tolerance Specification for Stratix III Devices
Symbol
Description
Conditions
R_{OCT_UNCAL}
25- R_S 3.3, 3.0, 2.5
25- R_S 1.8, 1.5
25- R_S 1.2
50- R_S 3.3, 3.0, 2.5
50- R_S 1.8, 1.5
50- R_S 1.2
R_D
Internal series termination without
calibration
Internal series termination without
calibration (25- setting)
Internal series termination without
calibration (25- setting)
Internal series termination without
calibration (25- setting)
Internal series termination without
calibration (50- setting)
Internal series termination without
calibration (50- setting)
Internal series termination without
calibration (50- setting)
Internal differential termination for
LVDS technology (100-setting)
V_CCIO = 3.3, 3.0, 2.5 V
V_CCIO = 1.8, 1.5 V
V_CCIO = 1.2 V
V_CCIO = 3.3, 3.0, 2.5 V
V_CCIO = 1.8, 1.5 V
V_CCIO = 1.2 V
V_CCIO = 2.5 V
Resistance Tolerance
Unit
C2 C3, I3 C4, I4
—
±30 ±40 ±40 %
±30 ±50 ±50 %
±35 ±60 ±60 %
±30 ±40 ±40 %
±30 ±50 ±50 %
±35 ±60 ±60 %
-15 to 35
%
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.
Equation 1–1. OCT Variation Without Re-Calibration (Note 1)
R_OCT
=
R_S
CA

L_
1
+

d_----R_--
dT

T 

d_----R_--
dV

V
Notes to Equation 1–1:
(1) R_OCT value calculated from Equation 1–1 shows the range of OCT resistance with the variation of temperature and
V_CCIO.
(2) R_SCAL 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 R_SCAL with temperature.
(6) dR/dV is the percentage change of R_SCAL with voltage.
© July 2010 Altera Corporation
Stratix III Device Handbook, Volume 2