APEX20KC datasheet(62/90 Pages) ALTERA

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Altera Corporation

APEX 20KC Programmable Logic Device Data Sheet

Table 32. SSTL-3 Class II Specifications

Symbol

Parameter

Conditions

Minimum

Typical

Maximum

Units

VCCIO

I/O supply voltage

3.0

3.3

3.6

VTT

Termination voltage

VREF – 0.05

VREF

VREF + 0.05

VREF

Reference voltage

1.3

1.5

1.7

VIH

High-level input

voltage

VREF + 0.2

VCCIO + 0.3

VIL

Low-level input

voltage

–0.3

VREF – 0.2

VOH

High-level output

voltage

IOH = –16 mA (1)

VTT + 0.8

VOL

Low-level output

voltage

IOL = 16 mA (2)

VTT – 0.8

Table 33. HSTL Class I I/O Specifications

Symbol

Parameter

Conditions

Minimum

Typical

Maximum

Units

VCCIO

I/O supply voltage

1.71

1.8

1.89

VTT

Termination voltage

VREF – 0.05

VREF

VREF + 0.05

VREF

Reference voltage

0.68

0.75

0.90

VIH

High-level input

voltage

VREF + 0.1

VCCIO + 0.3

VIL

Low-level input

voltage

–0.3

VREF – 0.1

VOH

High-level output

voltage

IOH = –8 mA (1)

VCCIO – 0.4

VOL

Low-level output

voltage

IOL = 8 mA (2)

0.4

APEX20KC Datasheet(PDF) 62 Page - Altera Corporation

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