DS3102 Datasheet, PDF (1/141 Pages) Maxim Integrated Products – Stratum 3 Timing Card IC with Synchronous Ethernet Support

Rev: 102607
DS3102
Stratum 3 Timing Card IC with
Synchronous Ethernet Support
General Description
The DS3102 is a low-cost, feature-rich timing IC for
telecom timing cards. With 8 input clocks, the device
directly accepts both line timing from a large number of
line cards and external timing from external DS1/E1
BITS transceivers. The DS3102 continually monitors all
input clocks and performs automatic hitless reference
switching if the primary reference fails. The T0 DPLL
complies with the Stratum 3 requirements of GR-1244,
GR-253, and the requirements of G.813 and G.8262.
The highly programmable DS3102 support numerous
input and output frequencies including rates required
for SONET/SDH, Synchronous Ethernet (1G, 10G,
and 100Mbps), wireless base stations, and CMTS
systems. PLL bandwidths from 0.5mHz 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. Two DS3102
devices can be configured in a master/slave
arrangement for timing card equipment protection.
The DS3102 register set is backward compatible with
Semtech’s ACS8522 timing card IC. The DS3102 has a
different package and pin arrangement than the
ACS8522.
Applications
SONET/SDH Equipment Clocks (SECs)
Synchronous Ethernet Equipment Clocks (EECs)
Timing Card IC in WAN Equipment Including MSPPs,
Ethernet Switches, Routers, DSLAMs, and
Wireless Base Stations
Ordering Information
PART
DS3102GN
DS3102GN+
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
81 CSBGA (10mm)²
81 CSBGA (10mm)²
+Denotes a lead-free/RoHS-compliant package.
SPI is a trademark of Motorola, Inc.
Features
♦ Synchronization for Stratum 3/4E/4, SMC, and
SEC
♦ Meets Requirements of GR-1244 Stratum 3,
GR-253, G.812 Type IV, G.813, and G.8262
♦ Stratum 3 Holdover Accuracy with Suitable
External Oscillator
♦ Programmable Bandwidth: 0.5mHz to 400Hz
♦ Hitless Reference Switching on Loss of Input
♦ Automatic or Manual Phase Build-Out
♦ Frequency Conversion Among SONET/SDH,
PDH, Ethernet, Wireless, and CMTS Rates
♦ 8 Input Clocks
♦ Four CMOS/TTL Inputs (≤ 125MHz)
♦ Four LVDS/LVPECL/CMOS/TTL Inputs
(≤ 156.25MHz)
♦ Three Optional Frame-Sync Inputs (CMOS/TTL)
♦ Continuous Input Clock Quality Monitoring
♦ Numerous Input Clock Frequencies Supported:
SONET/SDH: 6.48, N x 19.44, N x 51.84MHz
Ethernet xMII: 2.5, 25, 125, 156.25MHz
PDH: N x DS1, N x E1, N x DS2, DS3, E3
Frame Sync: 2kHz, 4kHz, 8kHz
Custom: Any Multiple of 2kHz Up to 131.072MHz,
Any Multiple of 8kHz Up to 155.52MHz
♦ 7 Output Clocks
♦ Three CMOS/TTL Outputs (≤ 125MHz)
♦ Two LVDS/LVPECL Outputs (≤ 312.50MHz)
♦ Two Dual CMOS/TTL and LVDS/LVPECL Outputs
♦ Five CMOS Outputs Have Additional Output Pins
That Can Be Powered at 2.5V or 3.3V
♦ Numerous Output Clock Frequencies Supported:
SONET/SDH: 6.48, N x 19.44, N x 51.84MHz
Ethernet xMII: 2.5, 25, 125, 156.25, 312.5MHz
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
♦ Internal Compensation for Master Clock
Oscillator
♦ SPI™ Processor Interface
♦ 1.8V Operation with 3.3V I/O (5V Tolerant)
♦ Industrial Temperature Range
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.