EP3SL340 datasheet(17/341 Pages) ALTERA

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Chapter 1: Stratix III Device Datasheet: DC and Switching Characteristics

1–7

Electrical Characteristics

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

C3, I3

C4, I4

OCT_UNCAL

Internal series termination without

calibration

—

25-

 R

S 3.3, 3.0, 2.5

Internal series termination without

calibration (25-

 setting)

CCIO = 3.3, 3.0, 2.5 V

±30

±40

25-

 R

S 1.8, 1.5

Internal series termination without

calibration (25-

 setting)

CCIO = 1.8, 1.5 V

±30

±50

25-

 R

S 1.2

Internal series termination without

calibration (25-

 setting)

CCIO = 1.2 V

±35

±60

50-

 R

S 3.3, 3.0, 2.5

Internal series termination without

calibration (50-

 setting)

CCIO = 3.3, 3.0, 2.5 V

±30

±40

50-

 R

S 1.8, 1.5

Internal series termination without

calibration (50-

 setting)

CCIO = 1.8, 1.5 V

±30

±50

50-

 R

S 1.2

Internal series termination without

calibration (50-

 setting)

CCIO = 1.2 V

±35

±60

Internal differential termination for

LVDS technology (100-

setting)

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.

OCT

SCAL 1

-------

T





-------

V











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