DS20006554A datasheet(79/94 Pages) MICROCHIP

79 / 94 page

ZL30260-ZL30263

Data Sheet

DS20006554A

Figure 15 - Example External Components for Differential Input Signals

Figure 16 - Electrical Characteristics: Differential Clock Outputs

Table 10 - Electrical Characteristics: LVDS Clock Outputs

VDDOx=VDDH=3.3V±5% or VDDOx=VDDH=2.5V±5% for LVDS operation.

Characteristics

Symbol

Min.

Typ.

Max.

Units

Notes

Output frequency

fOCD

1045

MHz

Output common-mode voltage

VCM

1.13

1.2

1.37

Note 1. See Figure 16

Output differential voltage

VOD

310

420

530

Note 1. See Figure 16

Output differential swing, peak-to-peak

VOD,PP

620

840

1060

mVPP

Note 1. See Figure 16

Output rise/fall time

tR, tF

150

20%-80%

Output duty cycle

Note 1:

OCxCR2.OCSF=0001 (LVDS). Output must have 100

 DC path between OUTxP and OUTxN to meet these V

OD specs. See Figure

17 parts a) and b) for examples where this DC path is a 100

 termination resistor at the receiver.

Signal

Driver



100



Receiver

Driver-

specified

termination

network

LVDS

Example termination networks:

LVPECL

VDD_driver=3.3V: R1=127

, R2=82

VDD_driver=2.5V: R1=250

, R2=62.5

CML



VDD_driver



HCSL

bias

Signal

Driver



Receiver

Driver-

specified

network

Place the 100

 termination resistor as close as possible

to the device pins.

VDD_driver

bias

100



Consult the signal driver’s data sheet for any required

DC network for this arrangement where the termination

resistor is on the receiver side of the AC coupling caps.

LVPECL drivers often need resistors (typically <200

) to

ground in the DC network.

VOCxP

VOCxN

VOD

1/fOCD

VOH

VOL

VCM

VOCxP - VOCxN

VOD,PP

Microchip

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