9DB423BFLFT datasheet(1/19 Pages) IDT

Part #	9DB423BFLFT

Description	Four Output Differential Buffer for PCIe Gen 1, Gen 2 and QPI

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Manufacturer	IDT [Integrated Device Technology]

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9DB423B

IDT®

Four Output Differential Buffer for PCIe and Gen 1, Gen 2 and QPI

1437B - 02/04/10

Four Output Differential Buffer for PCIe Gen 1, Gen 2 and QPI

DATASHEET

1

STOP

LOGIC

SRC_IN

SRC_IN#

DIF(6,5,2,1)

CONTROL

LOGIC

BYPASS#_133_100

SDATA

SCLK

PD

SPREAD

COMPATIBLE

PLL

4

IREF

M

U

X

OE(6,1)

2

HIGH_BW#

DIF_STOP#

Output Features

•

4 - 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

Funtional Block Diagram

Key Specifications

•

Output 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

•

RoHS compliant packaging

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.

Note: Polarities shown for OE_INV = 0.

Recommended Application:

DB400Q compatible part with PCIe Gen1, Gen 2 and QPI

support

General Description:

The ICS9DB423 is compatible with the Intel DB400Q Differential

Buffer Specification. This buffer provides 4 PCI-Express SRC or

4 QPI clocks. The ICS9DB423 is driven by a differential output

pair from a CK410B+ or CK509B main clock generator.

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