1–6

Chapter 1: DC and Switching Characteristics of HardCopy III Devices

Electrical Characteristics

HardCopy III Device Handbook, Volume 3

© December 2008

Altera Corporation

The accuracy listed in Table 1–6 is valid at the time of calibration. If the voltage or

temperature changes, the termination resistance value varies. Table 1–7 lists the

resistance tolerance for HardCopy III on-chip termination.

Table 1–8 lists OCT variation with temperature and voltage after power-up

calibration. Use Table 1–8 and Equation 1–1 to determine OCT variation without

re-calibration.

50−Ω R

Internal parallel termination with calibration

(50-

Ω setting)

V

TBD

—

%

50−Ω R

Internal series termination with calibration

(50-

Ω setting)

V

TBD

—

%

50−Ω R

Internal parallel termination with calibration

(50-

Ω setting)

V

TBD

—

%

Notes to Table 1–6:

(1) OCT calibration accuracy is valid at the time of calibration only.

(2) Pending silicon characterization.

Symbol

Description

Conditions

Calibration Accuracy

Unit

Industrial

Table 1–7. On-Chip Termination Resistance Tolerance Specification for I/Os – Preliminary (Note 1)

Symbol

Description

Resistance Tolerance

Unit

Commercial Max

Industrial Max

R

OCT_UNCAL

Internal series termination without calibration

TBD

—

%

R

OCT_CAL

Internal series termination with calibration

(2)

—%

Notes to Table 1–7:

(1) Pending silicon characterization.

(2) For resistance tolerance after power-up calibration, refer to Table 1–8.

Equation 1–1.

R

OCT

R

dR

dT

-------

ΔT dR

dV

-------

ΔV

×

+

×

+

⎝⎠

⎛⎞

=