HC210 datasheet(55/228 Pages) ALTERA

55 / 228 page

Altera Corporation

4–13

September 2008

I/O Standard Specifications

VX(AC)

AC differential input cross point

voltage

—(VCCIO/2) – 0.175

—

(VCCIO/2) +

0.175

VSWING(AC)

AC differential input voltage

—

0.5

—

VISO

Input clock signal offset voltage

—

0.5 ×

VCCIO

—V

ΔVISO

Input clock signal offset voltage

variation

—

± 200

—

VOX(AC)

AC differential cross point

voltage

—(VCCIO/2) – 0.125

—

(VCCIO/2) +

0.125

Table 4–18. SSTL-18 Differential Specifications (Part 2 of 2)

Symbol

Parameter

Conditions

Minimum

Typical

Maximum

Unit

Table 4–19. SSTL-2 Class I 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

—

3.0

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 = -8.1 mA (1), (2)

VTT + 0.57

—

VOL

Low-level output

voltage

IOL = 8.1 mA (1), (2)

——

VTT – 0.57

Notes to Table 4–19:

(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 of 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.

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