LCMXO2-640ZE-2TG100C datasheet(49/106 Pages) LATTICE

Il numero della parte	LCMXO2-640ZE-2TG100C

Spiegazioni elettronici	MachXO2??Family Data Sheet

PDF	106 Pages

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Produttore elettronici	LATTICE [Lattice Semiconductor]

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3-10

DC and Switching Characteristics

MachXO2 Family Data Sheet

LVDS Emulation

MachXO2 devices can support LVDS outputs via emulation (LVDS25E). The output is emulated using complemen-

tary LVCMOS outputs in conjunction with resistors across the driver outputs on all devices. The scheme shown in

Figure 3-1 is one possible solution for LVDS standard implementation. Resistor values in Figure 3-1 are industry

standard values for 1% resistors.

Figure 3-1. LVDS Using External Resistors (LVDS25E)

Table 3-1. LVDS25E DC Conditions

Over Recommended Operating Conditions

Parameter

Description

Typ.

Units

ZOUT

Output impedance

Ohms

Driver series resistor

158

Ohms

Driver parallel resistor

140

Ohms

Receiver termination

100

Ohms

VOH

Output high voltage

1.43

VOL

Output low voltage

1.07

VOD

Output differential voltage

0.35

VCM

Output common mode voltage

1.25

ZBACK

Back impedance

100.5

Ohms

IDC

DC output current

6.03

158

Zo = 100

140

100

On-chip

Off-chip

VCCIO = 2.5

8mA

Note: All resistors are ±1%.

VCCIO = 2.5

Emulated

LVDS

Buffer

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