IO134PDB3V2 datasheet(48/212 Pages) MICROSEMI

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Military ProASIC3/EL DC and Switching Characteristics

2-34

Revision 3

Table 2-37 • I/O Output Buffer Maximum Resistances 1

Applicable to Standard Plus I/O Banks for A3P250 and A3P1000 Only

Standard

Drive Strength

RPULL-DOWN

(

) 2

RPULL-UP

(

) 3

3.3 V LVTTL / 3.3 V LVCMOS

2 mA

100

300

4 mA

100

300

6 mA

150

8 mA

150

12 mA

16 mA

3.3 V LVCMOS Wide Range

100 µA

Same as regular 3.3 V LVCMOS

2.5 V LVCMOS

2 mA

100

200

4 mA

100

200

6 mA

100

8 mA

100

12 mA

1.8 V LVCMOS

2 mA

200

225

4 mA

100

112

6 mA

8 mA

1.5 V LVCMOS

2 mA

200

224

4 mA

100

112

3.3 V PCI/PCI-X

Per PCI/PCI-X specification

Notes:

1. These maximum values are provided for informational reasons only. Minimum output buffer resistance values depend

on VCCI, drive strength selection, temperature, and process. For board design considerations and detailed output buffer

resistances, use the corresponding IBIS models located at http://www.actel.com/download/ibis/default.aspx.

2. R(PULL-DOWN-MAX) = (VOLspec) / IOLspec

3. R(PULL-UP-MAX) = (VCCImax – VOHspec) / IOHspec

Table 2-38 • I/O Weak Pull-Up/Pull-Down Resistances

Minimum and Maximum Weak Pull-Up/Pull-Down Resistance Values

VCCI

R(WEAK PULL-UP)1

(

)

R(WEAK PULL-DOWN)2

(

)

Min.

Max.

Min.

Max.

3.3 V

10 k

95 k

13 k

45 k

3.3 V (wide range I/Os)

10 k

95 k

13 k

45 k

2.5 V

11 k

100 k

17 k

74 k

1.8 V

19 k

85 k

23 k

110 k

1.5 V

20 k

120 k

17 k

156 k

1.2 V

30 k

450 k

25 k

300 k

1.2 V (wide range I/Os)

20 k

450 k

17 k

300 k

Notes:

1. R(WEAK PULL-UP-MAX) = (VCCImax – VOHspec) / I(WEAK PULL-UP-MIN)

2. R(WEAK PULL-DOWN-MAX) = (VOLspec) / I(WEAK PULL-UP-MIN)

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