Datasheet > 843751

843751

更新时间： 2024-11-05 01:14:43

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艾迪悌 - IDT		/
页数	文件大小	规格书
17页	217K
描述
FemtoClockâ¢ SAS/SATA Clock Generator

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数据手册

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843751 数据手册

FemtoClock™ SAS/SATA Clock Generator

843751

DATA SHEET

General Description

Features

The 843751 is a low jitter, high performance clock generator. The

843751 is designed for use in the SAS-2 interconnect and the three

transport protocols that use the SAS-2 interconnect: Serial SCSI

Protocol (SSP), Serial ATA Tunneled Protocol (STP), and Serial

Management Protocol (SMP). The 843751 has excellent (<1ps)

RMS phase jitter, over the SAS defined integration range. The

843751 uses an external, 25MHz, parallel resonant crystal to

generate 75MHz. This silicon based approach provides excellent

frequency stability and reliability. The 843751 features up, down, and

center spread spectrum (SSC) clocking techniques. The up, down

and center SSC will be required in the SAS-2 applications that have

three clock trees in the HBA and expander ASICs.

• Designed for use in SAS, SAS-2 systems

• Up, down and center Spread Spectrum Clocking (SSC)

• One differential 3.3V or 2.5V LVPECL output pair

• Output frequency: 75MHz

• RMS phase jitter @ 75MHz, (900kHz – 7.5MHz):

0.734ps (typical) @ 3.3V

• 3.3V or 2.5V operating supply modes

• 0°C to 70°C ambient operating temperature

• Available in lead-free (RoHS 6) package

• Functional replacement part: 843002AYLF

Applications

• SAS/SATA Host Bus Adapters

• SATA Port Multipliers

• SAS I/O Controllers

• TapeDrive and HDD Array Controllers

• SAS Edge and Fanout Expanders

• HDDs and TapeDrives

• Disk Storage Enterprise

Block Diagram

Pin Assignment

25MHz

75MHz

XTAL_IN

FemtoClock™

OSC

PLL

XTAL_OUT

Pulldown

843751

8-Lead SOIC, 150 Mil

3.90mm x 4.90mm x 1.375mm package body

M Package

SSC_SEL[1:0]

Top View

843751 REVISION B 08.21.15

12 3 4 5 6 7...17

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843751AMLF	IDT	获取价格	FemtoClockâ¢ SAS/SATA Clock Generator
843751AMLFT	IDT	获取价格	FemtoClockâ¢ SAS/SATA Clock Generator
843800-000	MACOM	获取价格	RAYCHEM Tubing Products
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843801I-24	IDT	获取价格	PLL/Frequency Synthesis Circuit
843801I-24LF	IDT	获取价格	PLL/Frequency Synthesis Circuit
843801I-24LFT	IDT	获取价格	PLL/Frequency Synthesis Circuit
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