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.

Key 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

Applications/Uses

SONET/SDH, Synchronous Ethernet, PDH, and Other Line Cards in WAN Equipment Including MSPPs, Ethernet Switches, Routers, DSLAMs, and Wireless Base Stations