8P34S2108NLGI datasheet(1/21 Pages) RENESAS

Part #	8P34S2108NLGI

Description	Dual 1:8 LVDS Output 1.8V / 2.5V Fanout Buffer

PDF	21 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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November 20, 2023

Description

The 8P34S2108 is a high-performance, low-power, differential

dual 1:8 LVDS output 1.8V/2.5V fanout buffer. The device

supports fail-safe operation and is designed for the fanout of

high-frequency, very low additive phase-noise clock and data

signals. Two independent buffer channels are available, each

channel has two low skew outputs. High isolation between

channels minimizes noise coupling.

Guaranteed output-to-output and part-to-part skew characteristics

make the 8P34S2108 ideal for those clock distribution

applications demanding well-defined performance and

repeatability. The device is characterized to operate from a 1.8V

or 2.5V power supply. The integrated bias voltage references

enable easy interfacing AC-coupled signals to the device inputs.

Block Diagram

Features

▪ Dual 1:8 low skew, low additive jitter LVDS fanout buffers

▪ Matched AC characteristics across both channels

▪ High isolation between channels

▪ Both differential CLKA, nCLKA and CLKB, nCLKB inputs

accept LVDS, LVPECL and single-ended LVCMOS levels

▪ Maximum input clock frequency: 2GHz

▪ Output amplitudes: 350mV, 500mV or disable (selectable)

▪ Output bank skew: 10ps typical

▪ Output skew: 20ps typical

▪ Low additive phase jitter, RMS: 45fs typical

(fREF = 156.25MHz, 12kHz–20MHz)

▪ Full 1.8V and 2.5V supply voltage mode

▪ Low device current consumption (IDD):

• 280mA typical: 1.8V

• 290mA typical: 2.5V

▪ Lead-free (RoHS 6), 48-lead VFQFPN packaging

▪ -40°C to +85°C ambient operating temperature

▪ Supports case temperature up to +105°C

CLKA

nCLKA

VREFA

SELAA

Voltage

Reference A

QA0

nQA0

QA1

nQA1

QA2

nQA2

QA3

nQA3

QA4

nQA4

QA5

nQA5

QA6

nQA6

QA7

nQA7

51k

CLKB

nCLKB

VREFB

SELAB

Voltage

Reference B

51k

QB0

nQB0

QB1

nQB1

QB2

nQB2

QB3

nQB3

QB4

nQB4

QB5

nQB5

QB6

nQB6

QB7

nQB7

51k

VDDB

VDDA

VDDB

51k

8P34S2108

Datasheet

Dual 1:8 LVDS Output 1.8V / 2.5V

Fanout Buffer

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8P34S2108NLGI Datasheet(PDF) 1 Page - Renesas Technology Corp

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