HC210 datasheet(56/228 Pages) ALTERA

56 / 228 page

4–14

Altera Corporation

September 2008

HardCopy Series Handbook, Volume 1

Table 4–20. SSTL-2 Class II Specifications

Symbol

Parameter

Conditions

Minimum

Typical

Maximum

Unit

VCCIO

Output-supply voltage

—

2.375

2.5

2.625

VTT

Termination voltage

—

VREF – 0.04

VREF

VREF + 0.04

VREF

Reference voltage

—

1.188

1.25

1.313

VIH (DC)

High-level input voltage

—

VREF + 0.18

—

VCCIO + 0.3

VIL (DC)

Low-level input voltage

—

-0.3

—

VREF – 0.18

VIH (AC)

High-level input voltage

—

VREF + 0.35

—

VIL (AC)

Low-level input voltage

—

VREF – 0.35

VOH

High-level output

voltage

IOH = -16.4 mA (1), (2)

VTT + 0.76

—

VOL

Low-level output

voltage

IOL = 16.4 mA (1), (2)

——

VTT – 0.76

Notes to Table 4–20:

(1)

This specification is supported across all the programmable drive settings available for this I/O standard as shown

in the I/O Structure and Features section located in the Description, Architecture, and Features chapter in volume 1 of

the HardCopy Series Devices Handbook.

(2)

Drive strength varies based on pin location. Refer to the Description, Architecture, and Features chapter in the

HardCopy II Device Family Data Sheet section in volume 1 of the HardCopy Series Handbook for more information.

Table 4–21. SSTL-2 Differential Specifications

Symbol

Parameter

Conditions

Minimum

Typical

Maximum

Unit

VCCIO

Output-supply voltage

—

2.375

2.5

2.625

VSWING (DC)

DC differential input voltage

—

0.36

—

VX (AC)

AC differential input cross point

voltage

—(VCCIO/2) – 0.2

—

(VCCIO/2) + 0.2

VSWING (AC)

AC differential input voltage

—

0.7

—

VISO

Input clock signal offset voltage

—

0.5 ×

VCCIO

—V

ΔVISO

Input clock signal offset voltage

variation

—

±200

—

VOX (AC)

AC differential output cross point

voltage

—(VCCIO/2) – 0.2

—

(VCCIO/2) + 0.2

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