DS0128 datasheet(74/140 Pages) MICROSEMI

74 / 140 page

IGLOO2 FPGA and SmartFusion2 SoC FPGA

Microsemi Proprietary and Confidential DS0128 Datasheet Revision 12.0

AC Switching Characteristics

Worst commercial-case conditions: TJ = 85 °C, VDD = 1.14 V, VDDI = 2.375 V.

2.3.7.6 LVPECL

Low-Voltage Positive Emitter-Coupled Logic (LVPECL) is another differential I/O standard. It requires

that one data bit be carried through two signal lines. Similar to LVDS, two pins are needed. It also

requires external resistor termination. IGLOO2 and SmartFusion2 SoC FPGAs support only LVPECL

receivers and do not support LVPECL transmitters.

Minimum and Maximum Input and Output Levels (Applicable to MSIO I/O Bank Only)

Table 210 • RSDS AC Switching Characteristics for Receiver (for MSIO I/O Bank - Input Buffers)

On-Die Termination (ODT)

TPY

Unit

–1

–Std

None

2.855

3.359

100

2.85

3.353

Table 211 • RSDS AC Switching Characteristics for Receiver (for MSIOD I/O Bank - Input Buffers)

On-Die Termination (ODT)

TPY

Unit

–1

–Std

None

2.602

3.061

100

2.597

3.055

Table 212 • RSDS AC Switching Characteristics for Transmitter (for MSIO I/O Bank - Output and

Tristate Buffers)

TDP

TZL

TZH

THZ

TLZ

Unit

–1

–Std

–1

–Std

–1

–Std

–1

–Std

–1

–Std

2.097

2.467 2.303

2.709 2.291

2.695 1.961

2.307 1.947

2.29

Table 213 • RSDS AC Switching Characteristics for Transmitter (for MSIOD I/O Bank - Output and Tristate

Buffers)

TDP

TZL

TZH

THZ

TLZ

Unit

–1

–Std

–1

–Std

–1

–Std

–1

–Std

–1

–Std

No pre-emphasis

1.614

1.899 1.559

1.834 1.55

1.823

1.59

1.87

1.575

1.852 ns

Min pre-emphasis

1.604

1.887 1.742

2.05

1.728

2.032

1.889

2.222 1.858

2.185 ns

Med pre-emphasis

1.521

1.79

1.753

2.062 1.737

2.043

1.9

2.235 1.868

2.197ns

Max pre-emphasis

1.492

1.754 1.762

2.073 1.745

2.052

1.91

2.247 1.876

2.206 ns

Table 214 • LVPECL Recommended DC Operating Conditions

Parameter

Symbol

Min

Typ

Max

Unit

Supply voltage

VDDI

3.15

3.3

3.45

Table 215 • LVPECL DC Input Voltage Specification

Parameter

Symbol

Min

Max

Unit

DC input voltage

03.45

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