FG484 datasheet(30/162 Pages) MICROSEMI

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ProASIC3E DC and Switching Characteristics

2-16

Revision 13

Overview of I/O Performance

Summary of I/O DC Input and Output Levels – Default I/O Software

Settings

Table 2-13 • Summary of Maximum and Minimum DC Input and Output Levels

Applicable to Commercial and Industrial Conditions

I/O Standard

Drive

Strength

Equivalent

Software

Default

Drive

Strength

Option1

Slew

Rate

VIL

VIH

VOL

VOH

IOL3 IOH3

Min.

Max.

Min.

Max.

Min.

VmA mA

3.3V LVTTL/

3.3 V

LVCMOS

12 mA

High –0.3

0.8

3.6

0.4

2.4

3.3 V

LVCMOS

Wide Range

100 µA

12 mA

High –0.3

0.8

3.6

0.2

VCCI – 0.2 0.1 0.1

2.5 V

LVCMOS

12 mA

High –0.3

0.7

1.7

3.6

0.7

1.7

1.8 V

LVCMOS

12 mA

High –0.3 0.35 * VCCI 0.65 * VCCI 3.6

0.45

VCCI – 0.45 12

1.5 V

LVCMOS

12 mA

High –0.3 0.30 * VCCI 0.7 * VCCI

3.6 0.25 * VCCI 0.75 * VCCI 12

3.3 V PCI

Per PCI Specification

3.3 V PCI-X

Per PCI-X Specification

3.3 V GTL

20 mA2

High –0.3 VREF – 0.05 VREF + 0.05 3.6

0.4

–

2.5 V GTL

20 mA2

High –0.3 VREF – 0.05 VREF + 0.05 3.6

0.4

–

3.3 V GTL+

35 mA

High –0.3 VREF – 0.1 VREF + 0.1 3.6

0.6

–

2.5 V GTL+

33 mA

High –0.3 VREF – 0.1 VREF + 0.1 3.6

0.6

–

HSTL (I)

8 mA

High –0.3 VREF – 0.1 VREF + 0.1 3.6

0.4

VCCI – 0.4

HSTL (II)

15 mA2

High –0.3 VREF – 0.1 VREF + 0.1 3.6

0.4

VCCI – 0.4

SSTL2 (I)

15 mA

High –0.3 VREF – 0.2 VREF + 0.2 3.6

0.54

VCCI – 0.62 15

SSTL2 (II)

18 mA

High –0.3 VREF – 0.2 VREF + 0.2 3.6

0.35

VCCI – 0.43 18

SSTL3 (I)

14 mA

High –0.3 VREF – 0.2 VREF + 0.2 3.6

0.7

VCCI – 1.1

SSTL3 (II)

21 mA

High –0.3 VREF – 0.2 VREF + 0.2 3.6

0.5

VCCI – 0.9

Notes:

1. The minimum drive strength for any LVCMOS 3.3 V software configuration when run in wide range is ±100 µA. Drive

strength displayed in the software is supported for normal range only. For a detailed I/V curve, refer to the IBIS models.

2. Output drive strength is below JEDEC specification.

3. Currents are measured at 85°C junction temperature.

4. Output Slew Rates can be extracted from IBIS Models, located at

http://www.microsemi.com/soc/download/ibis/default.aspx.

FG484 Datasheet(PDF) 30 Page - Microsemi Corporation

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