DS31407GN+ Maxim Integrated Products, DS31407GN+ Datasheet

DS31407GN+

Manufacturer Part Number

DS31407GN+

Description

IC SONET/SDH SYNC CSBGA

Manufacturer

Maxim Integrated Products

Datasheets

1.DS31407.pdf (4 pages)

2.DS31407GN.pdf (4 pages)

Specifications of DS31407GN+

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Other names

90-31407+GN0

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The DS31407 is a flexible, high-performance timing IC

for

synthesis applications. On each of its three input clocks

and four output clocks, the device can accept or

generate nearly any frequency between 2kHz and

750MHz.

The input clocks are divided down, fractionally scaled as

needed, and continuously monitored for activity and

frequency accuracy. The best input clock is selected,

manually or automatically, as the reference clock for the

rest of the device. A flexible, high-performance digital

PLL locks to the selected reference and provides

programmable bandwidth, very high resolution holdover

capability, and truly hitless switching between input

clocks. The digital PLL is followed by a clock synthesis

subsystem that has two fully programmable digital

frequency synthesis blocks, a high-speed low-jitter

APLL, and four output clocks, each with its own 32-bit

divider and phase adjustment. The APLL provides

fractional scaling and output jitter less than 1ps RMS.

For telecom systems, the DS31407 has all required

features and functions to serve as a central timing

function or as a line card timing IC. With a suitable

oscillator the DS31407 meets the requirements of

Stratum 2, 3E, 3, 4E, and 4, G.812 Types I–IV, G.813,

and G.8262.

Frequency Conversion Applications in a Wide Variety of

Telecom Line Cards or Timing Cards with Any Mix of

+Denotes a lead(Pb)-free/RoHS-compliant package.

SPI is a trademark of Motorola, Inc.

Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple

revisions of any device may be simultaneously available through various sales channels. For information about device

errata, go to: www.maxim-ic.com/errata. For pricing, delivery, and ordering information, please contact Maxim Direct at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

19-5751; Rev 0; 1/11

DS31407GN+

Equipment Types

SONET/SDH, Synchronous Ethernet and/or OTN

Ports in WAN Equipment Including MSPPs, Ethernet

Switches, Routers, DSLAMs, and Base Stations

diverse

PART

frequency

TEMP RANGE

-40C to +85C

Ordering Information

General Description

3-Input, 4-Output, Single DPLL Timing IC

conversion

ABRIDGED DATA SHEET

Applications

and

PIN-PACKAGE

256 CSBGA

frequency

with Sub-ps Output Jitter



Three Input Clocks

High-Performance DPLL

Two Digital Frequency Synthesizers

High-Performance Output APLL

Four Output Clocks in Two Groups

General Features



Differential or CMOS/TTL Format

Any Frequency from 2kHz to 750MHz

Fractional Scaling for 64B/66B and FEC

Scaling (e.g., 64/66, 237/255, 238/255) or Any

Other Downscaling Requirement

Continuous Input Clock Quality Monitoring

Automatic or Manual Clock Selection

Three 2/4/8kHz Frame Sync Inputs

Hitless Reference Switching on Loss of Input

Automatic or Manual Phase Build-Out

Holdover on Loss of All Inputs

Programmable Bandwidth, 0.5mHz to 400Hz

Produce Any 2kHz Multiple Up to 77.76MHz

Per-DFS Clock Phase Adjust

Output Frequencies to 750MHz

High Resolution Fractional Scaling for FEC

and 64B/66B (e.g., 255/237, 255/238, 66/64)

or Any Other Scaling Requirement

Less than 1ps RMS Output Jitter

Nearly Any Frequency from < 1Hz to 750MHz

Each Group Slaves to a DFS Clock, an APLL

Clock, or Any Input Clock (Divided and Scaled)

Each Has a Differential Output (1 CML, 1 LVDS/

LVPECL

32-Bit Frequency Divider Per Output

Two Sync Pulse Outputs: 8kHz and 2kHz

Suitable Line Card IC or Timing Card IC for

Stratum 2/3E/3/4E/4, SMC, SEC/EEC, or SSU

Accepts and Produces Nearly Any Frequency Up

to 750MHz Including 1Hz, 2kHz, 8kHz, NxDS1,

NxE1, DS2/J2, DS3, E3, 2.5M, 25M, 125M,

156.25M, and Nx19.44M Up to 622.08M

Internal Compensation for Local Oscillator

Frequency Error

SPI™ Processor Interface

1.8V Operation with 3.3V I/O (5V Tolerant)

)

and Separate CMOS/TTL Output

Maxim Integrated Products 1

DS31407

Features

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