HC210 datasheet(60/228 Pages) ALTERA

60 / 228 page

4–18

Altera Corporation

September 2008

HardCopy Series Handbook, Volume 1

Bus Hold

Specifications

Table 4–28 shows the HardCopy II device family’s bus hold

specifications.

VDIF (AC)

AC differential input voltage

—

0.4

—

VCCIO + 0.6 V

VOX (AC)

AC differential cross point voltage

—

0.68

—

0.9

Table 4–27. 1.8-V Differential HSTL Specifications (Part 2 of 2)

Symbol

Parameter

Conditions

Minimum

Typical

Maximum

Unit

Table 4–28. Bus Hold Parameters

Parameter

Conditions

VCCIO Level

Unit

1.5 V

1.8 V

2.5 V

3.3 V

Min

Max

Min

Max

Min

Max

Min

Max

Low

sustaining

current

VIN > VIL

(maximum)

—

µA

High

sustaining

current

VIN < VIH

(minimum)

-25

—

-30

—

-50

—

-70

—

µA

Low overdrive

current

0 V < VIN <

VCCIO

—

160

—

200

—

300

—

500

µA

High overdrive

current

0 V < VIN <

VCCIO

—

-160

—

-200

—

-300

—

-500

µA

Bus-hold

trip point

—

0.50

1.00

0.68

1.07

0.70

1.70

0.80

2.00

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