ICS9DB823B datasheet(1/23 Pages) RENESAS

Part #	ICS9DB823B

Description	EIGHT OUTPUT DIFFERENTIAL BUFFER FOR PCIE GEN1, GEN2 AND QPI

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Manufacturer	RENESAS [Renesas Technology Corp]

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DATASHEET

EIGHT OUTPUT DIFFERENTIAL BUFFER FOR PCIE GEN1, GEN2 AND QPI

ICS9DB823B

IDT®

EIGHT OUTPUT DIFFERENTIAL BUFFER FOR PCIE GEN1, GEN2 AND QPI

1

ICS9DB823B

REV F 091812

General Description

The ICS9DB823B is compatible with the Intel DB800Q

Differential Buffer Specification. This buffer provides 8

PCI-Express SRC or 8 QPI clocks. The ICS9DB823B is

driven by a differential output pair from a CK410B+ or

CK509B main clock generator.

Recommended Application

DB800Q compatible part with PCIe Gen1, Gen 2 and QPI

support

Output Features

• 8 - 0.7V current-mode differential output pairs

• Supports zero delay buffer mode and fanout mode

• Bandwidth programming available

• 50-133 MHz operation in PLL mode

• 33-400 MHz operation in Bypass mode

Features/Benefits

• Spread spectrum modulation tolerant, 0 to -0.5% down

spread and +/- 0.25% center spread

• Supports undriven differential outputs in Power Down

and DIF_STOP# modes for power management.

Key Specifications

• Outputs cycle-cycle jitter < 50ps

• Output to Output skew <50ps

• Phase jitter: PCIe Gen1 < 86ps peak to peak

• Phase jitter: PCIe Gen2 < 3.0/3.1ps rms

• Phase jitter: QPI < 0.5ps rms

Functional Block Diagram

Note: Polarities shown are for OE_INV=0.

STOP

LOGIC

SRC_IN

SRC_IN#

DIF(7:0))

CONTROL

LOGIC

BYPASS#_133_100

SDATA

SCLK

PD#

SPREAD

COMPATIBLE

PLL

8

IREF

OE_(7:0)

8

LOCK

SRC_STOP#

HIGH_BW#

M

U

X

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ICS9DB823B Datasheet(PDF) 1 Page - Renesas Technology Corp

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