9DBL0442 datasheet(1/19 Pages) IDT

Part #	9DBL0442

Description	4-Output 3.3V PCIe Zero-delay Buffer

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Manufacturer	IDT [Integrated Device Technology]

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DATASHEET

9DBL0442 / 9DBL0452 FEBRUARY 22, 2017

1

4-Output 3.3V PCIe Zero-delay

Buffer

9DBL0442 / 9DBL0452

Description

The 9DBL0442 / 9DBL0452 devices are 3.3V members of

IDT's Full-Featured PCIe family. The 9DBL0442 / 9DBL0452

supports PCIe Gen1-4 Common Clocked (CC) and PCIe

Separate Reference Independent Spread (SRIS) systems. It

offers a choice of integrated output terminations providing

direct connection to 85

 or 100 transmission lines. The

9DBL04P2 can be factory programmed with a user-defined

power up default SMBus configuration.

Recommended Application

PCIe Gen1-4 clock distribution for Riser Cards, Storage,

Networking, JBOD, Communications, Access Points

Output Features

• 4 – 1-200 MHz Low-Power (LP) HCSL DIF pairs

• 9DBL0442 default ZOUT = 100

• 9DBL0452 default ZOUT = 85

• 9DBL04P2 factory programmable defaults

• Easy AC-coupling to other logic families, see IDT

application note AN-891

Key Specifications

• PCIe Gen1-2-3-4 CC compliant in ZDB mode

• PCIe Gen2 SRIS compliant in ZDB mode

• Supports PCIe Gen2-3 SRIS in fan-out mode

• DIF cycle-to-cycle jitter < 50ps

• DIF output-to-output skew < 50ps

• Bypass mode additive phase jitter is 0 ps typical rms for

PCIe

• Bypass mode additive phase jitter 160fs rms typ. @

156.25M (1.5M to 10M)

Features/Benefits

• Direct connection to 100 (xx42) or 85 (xx52)

transmission lines; saves 16 resistors compared to

standard PCIe devices

• 132mW typical power consumption in PLL mode;

eliminates thermal concerns

• SMBus-selectable features allows optimization to customer

requirements:

– control input polarity

– control input pull up/downs

– slew rate for each output

– differential output amplitude

– output impedance for each output

– 50, 100, 125MHz operating frequency

• Customer defined SMBus power up default can be

programmed into P2 device; allows exact optimization to

customer requirements

• OE# pins; support DIF power management

• HCSL-compatible differential input; can be driven by

common clock sources

• Spread Spectrum tolerant; allows reduction of EMI

• Pin/SMBus selectable PLL bandwidth and PLL Bypass;

minimize phase jitter for each application

• Outputs blocked until PLL is locked; clean system start-up

• Device contains default configuration; SMBus interface not

required for device operation

• Three selectable SMBus addresses; multiple devices can

easily share an SMBus segment

• 5 × 5 mm 32-VFQFPN package; minimal board space

Block Diagram

Note: Resistors default to internal on xx42/xx52 devices. P2 devices have programmable default impedances on an output-by-output basis.

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