VMV3 datasheet(89/212 Pages) MICROSEMI

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Military ProASIC3/EL Low Power Flash FPGAs

Revision 3

2-75

Voltage-Referenced I/O Characteristics

3.3 V GTL

Gunning Transceiver Logic is a high-speed bus standard (JESD8-3). It provides a differential amplifier input

buffer and an open-drain output buffer. The VCCI pin should be connected to 3.3 V.

Timing Characteristics

Table 2-119 • Minimum and Maximum DC Input and Output Levels

3.3 V GTL

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

20 mA5

–0.3

VREF – 0.05 VREF + 0.05

3.6

0.4

–

20 20

268

181

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.

5. Output drive strength is below JEDEC specification.

Figure 2-16 • AC Loading

Table 2-120 • 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 – 0.05

VREF + 0.05

0.8

1.2

Note:

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

Test Point

10 pF

GTL

VTT

Table 2-121 • 3.3 V GTL

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

Worst-Case VCCI = 3.0 V, VREF = 0.8 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

2.34

0.52

2.01

2.05

–

4.22

4.26

–1

0.68

1.75

0.05

1.99

0.44

1.71

1.75

–

3.59

3.62

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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