FG484 datasheet(100/212 Pages) MICROSEMI

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Military ProASIC3/EL DC and Switching Characteristics

2-86

Revision 3

SSTL3 Class II

Stub-Speed Terminated Logic for 3.3 V memory bus standard (JESD8-8). Military ProASIC3E devices

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

Timing Characteristics

Table 2-155 • Minimum and Maximum DC Input and Output Levels

SSTL3 Class II

VIL

VIH

VOL

VOH

IOL IOH IOSL

IOSH

IIL IIH

Drive

Strength

Min.

Max.

Min.

Max.

Min.

VmA mA

Max.

mA1

Max.

mA1 µA2 µA2

21 mA

–0.3

VREF – 0.2 VREF + 0.2

3.6

0.5

VCCI – 0.9

21 21

103

109

15 15

Notes:

1. Currents are measured at 100°C junction temperature and maximum voltage.

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

Figure 2-25 • AC Loading

Table 2-156 • 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

1.5

1.485

Note:

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

Test Point

30 pF

SSTL3

Class II

VTT

Table 2-157 • SSTL3 Class II

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

Worst-Case VCCI = 3.0 V, VREF = 1.5 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

2.05

0.05

2.00

0.52

2.08

1.65

–

2.08

1.65

–1

0.68

1.75

0.05

1.71

0.44

1.77

1.41

–

1.77

1.41

Note:

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

Table 2-158 • SSTL3 Class II

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

Worst-Case VCCI = 3.0 V, VREF = 1.5 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

1.91

0.04

1.77

0.40

1.92

1.54

–

1.92

1.54

–1

0.52

1.63

0.03

1.51

0.34

1.64

1.31

–

1.64

1.31

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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