APEX20KC datasheet(61/90 Pages) ALTERA

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Altera Corporation

APEX 20KC Programmable Logic Device Data Sheet

Table 30. SSTL-2 Class II Specifications

Symbol

Parameter

Conditions

Minimum

Typical

Maximum

Units

VCCIO

I/O supply voltage

2.375

2.5

2.625

VTT

Termination voltage

VREF – 0.04

VREF

VREF + 0.04

VREF

Reference voltage

1.15

1.25

1.35

VIH

High-level input

voltage

VREF + 0.18

VCCIO + 0.3

VIL

Low-level input

voltage

–0.3

VREF – 0.18

VOH

High-level output

voltage

IOH = –15.2 mA (1)

VTT + 0.76

VOL

Low-level output

voltage

IOL = 15.2 mA (2)

VTT – 0.76

Table 31. SSTL-3 Class I 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 = –8 mA (1)

VTT + 0.6

VOL

Low-level output

voltage

IOL = 8 mA (2)

VTT – 0.6

APEX20KC Datasheet(PDF) 61 Page - Altera Corporation

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