FG896 datasheet(52/166 Pages) MICROSEMI

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ProASIC3E DC and Switching Characteristics

2-38

Revision 14

3.3 V PCI, 3.3 V PCI-X

Peripheral Component Interface for 3.3 V standard specifies support for 33 MHz and 66 MHz PCI Bus

applications.

AC loadings are defined per the PCI/PCI-X specifications for the datapath; Microsemi loadings for enable

path characterization are described in Figure 2-11.

AC loadings are defined per PCI/PCI-X specifications for the datapath; Microsemi loading for tristate is

described in Table 2-46.

Timing Characteristics

Table 2-45 • Minimum and Maximum DC Input and Output Levels

3.3 V PCI/PCI-X

VIL

VIH

VOL

VOH IOL IOH

IOSL

IOSH

IIL1 IIH2

Drive Strength

Min.

Max.

Min.

Max.

Min.

VmA mA

Max.

mA3

Max.

mA3

µA4 µA4

Per PCI specification

Per PCI curves

10 10

Notes:

1. IIL is the input leakage current per I/O pin over recommended operation conditions where –0.3 V< VIN < VIL.

2. IIH is the input leakage current per I/O pin over recommended operating conditions VIH < VIN< VCCI. Input current is

larger when operating outside recommended ranges.

3. Currents are measured at high temperature (100°C junction temperature) and maximum voltage.

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

Figure 2-11 • AC Loading

Test Point

Enable Path

R to VCCI for tLZ / tZL / tZLS

10 pF for tZH / tZHS / tZL / tZLS

10 pF for tHZ / tLZ

R to GND for tHZ / tZH / tZHS

R = 1 k

Test Point

Datapath

R = 25

R to VCCI for tDP (F)

R to GND for tDP (R)

Table 2-46 • AC Waveforms, Measuring Points, and Capacitive Loads

Input Low (V)

Input High (V)

Measuring Point* (V)

VREF (typ.) (V)

CLOAD (pF)

3.3

0.285 * VCCI for tDP(R)

0.615 * VCCI for tDP(F)

–10

Note: *Measuring point = Vtrip. See Table 2-15 on page 2-18 for a complete table of trip points.

Table 2-47 • 3.3 V PCI/PCI-X

Commercial-Case Conditions: TJ = 70°C, Worst-Case VCC = 1.425 V, Worst-Case VCCI = 3.0 V

Speed

Grade

tDOUT

tDP

tDIN

tPY

tPYS

tEOUT

tZL

tZH

tLZ

tHZ

tZLS

tZHS

Units

Std.

0.66

2.81

0.04

1.05

1.67

0.43

2.86

2.00

3.28

3.61

5.09

4.23

–1

0.56

2.39

0.04

0.89

1.42

0.36

2.43

1.70

2.79

3.07

4.33

3.60

–2

0.49

2.09

0.03

0.78

1.25

0.32

2.13

1.49

2.45

2.70

3.80

3.16

Note: For specific junction temperature and voltage supply levels, refer to Table 2-6 on page 2-5 for derating values.

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