DS3106 Datasheet, PDF (1/87 Pages) Maxim Integrated Products – Line Card Timing IC

19-4629; Rev 3; 5/09
DS3106
Line Card Timing IC
General Description
The DS3106 is a low-cost timing IC for telecom line
cards. The device accepts two reference clocks from
dual redundant system timing cards, continually
monitors both inputs, and performs manual reference
switching if the primary reference fails. The highly
programmable DS3106 supports numerous input and
output frequencies including frequencies required for
SONET/SDH, Synchronous Ethernet (1G, 10G, and
100Mbps), wireless base stations, and CMTS
systems. PLL bandwidths from 18Hz to 400Hz are
supported, and a wide variety of PLL characteristics
and device features can be configured to meet the
needs of many different applications.
The DS3106 register set is backward compatible with
Semtech’s ACS8526 line card timing IC. The DS3106
pinout is similar but not identical to the ACS8526.
Applications
SONET/SDH, Synchronous Ethernet, PDH, and
Other Line Cards in WAN Equipment Including
MSPPs, Ethernet Switches, Routers, DSLAMs,
and Wireless Base Stations
Simplified Functional Diagram
IC3
DS3106
IC4
OC3
OC6 LVDS/LVPECL
FSYNC
MFSYNC
LOCAL
OSCILLATOR
CONTROL STATUS
Features
 Advanced DPLL Technology
 Programmable PLL Bandwidth: 18Hz to 400Hz
 Manual Reference Switching
 Holdover on Loss of All Input References
 Frequency Conversion Among SONET/SDH,
PDH, Ethernet, Wireless, and CMTS Rates
 Two Input Clocks
 CMOS/TTL Signal Format (≤ 125MHz)
 Numerous Input Clock Frequencies Supported
Ethernet xMII: 2.5, 25, 125, 156.25MHz
SONET/SDH: 6.48, N x 19.44, N x 51.84MHz
PDH: N x DS1, N x E1, N x DS2, DS3, E3
Frame Sync: 2kHz, 4kHz, 8kHz
Custom Clock Rates: Any Multiple of 2kHz Up
to 125MHz
 Two Output Clocks
 One CMOS/TTL Output (≤ 125MHz)
 One LVDS/LVPECL Output (≤ 312.50MHz)
 Two Optional Frame-Sync Outputs: 2kHz, 8kHz
 Numerous Output Clock Frequencies Supported
Ethernet xMII: 2.5, 25, 125, 156.25, 312.5MHz
SONET/SDH: 6.48, N x 19.44, N x 51.84MHz
PDH: N x DS1, N x E1, N x DS2, DS3, E3
Other: 10, 10.24, 13, 30.72MHz
Frame Sync: 2kHz, 8kHz
Custom Clock Rates: Any Multiple of 2kHz Up to
77.76MHz, Any Multiple of 8kHz Up to
311.04MHz, Any Multiple of 10kHz Up to
388.79MHz
 General
 Suitable Line Card IC for Stratum 3/3E/4, SMC,
SEC
 Internal Compensation for Master Clock Oscillator
 SPI™ Processor Interface
 1.8V Operation with 3.3V I/O (5V Tolerant)
 Industrial Operating Temperature Range
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
DS3106LN
-40C to +85C 64 LQFP
DS3106LN+
-40C to +85C 64 LQFP
+Denotes a lead(Pb)-free/RoHS-compliant package.
SPI is a trademark of Motorola, Inc.
Maxim Integrated Products 1
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.