VMV3 datasheet(97/212 Pages) MICROSEMI

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Military ProASIC3/EL Low Power Flash FPGAs

Revision 3

2-83

SSTL2 Class I

Stub-Speed Terminated Logic for 2.5 V memory bus standard (JESD8-9). Military ProASIC3E devices

support Class I. This provides a differential amplifier input buffer and a push-pull output buffer.

Timing Characteristics

Table 2-143 • Minimum and Maximum DC Input and Output Levels

SSTL2 Class I

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

15 mA

–0.3 VREF – 0.2 VREF + 0.2

3.6

0.54

VCCI – 0.62 15 15

15 15

Notes:

1. IIL is the input leakage current per I/O pin over recommended operating 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 100°C junction temperature and maximum voltage.

4. Currents are measured at 125°C junction temperature.

Figure 2-22 • AC Loading

Table 2-144 • AC Waveforms, Measuring Points, and Capacitive Loads

Input Low (V)

Input High (V)

Measuring

Point* (V)

VREF (typ.) (V)

VTT (typ.) (V)

CLOAD (pF)

VREF – 0.2

VREF + 0.2

1.25

Note:

*Measuring point = Vtrip. See Table 2-28 on page 2-27 for a complete table of trip points.

Test Point

30 pF

SSTL2

Class I

VTT

Table 2-145 • SSTL2 Class I

Military-Case Conditions: TJ = 125°C, Worst-Case VCC = 1.14 V,

Worst-Case VCCI = 2.3 V, VREF = 1.25 V

Applicable to Pro I/Os for A3PE600L and A3PE3000L Only

Speed

Grade

tDOUT

tDP

tDIN

tPY

tEOUT

tZL

tZH

tLZ

tHZ

tZLS

tZHS

Units

Std.

0.80

2.11

0.05

2.09

0.52

2.14

1.83

–

2.14

1.83

–1

0.68

1.80

0.05

1.78

0.44

1.82

1.55

–

1.82

1.55

Note:

For specific junction temperature and voltage supply levels, refer to Table 2-5 on page 2-8 for derating values.

Table 2-146 • SSTL2 Class I

Military-Case Conditions: TJ = 125°C, VCC = 1.425 V,

Worst-Case VCCI = 2.3 V, VREF = 1.25 V

Applicable to Pro I/Os for A3PE600L and A3PE3000L Only

Speed

Grade

tDOUT

tDP

tDIN

tPY

tEOUT

tZL

tZH

tLZ

tHZ

tZLS

tZHS

Units

Std.

0.61

1.98

0.04

1.85

0.40

1.99

1.71

–

1.99

1.71

–1

0.52

1.68

0.03

1.58

0.34

1.69

1.46

–

1.69

1.46

Note:

For specific junction temperature and voltage supply levels, refer to Table 2-5 on page 2-8 for derating values.

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