FEATURES
• Supports AT&T TR62411 and Telcordia GR-1244-CORE Stratum
3, Stratum 4 Enhanced and Stratum 4 clock, OC-3 port and
155.52 Mbit/s application
• Supports ITU-T G.813 Option 1 clocks
• Supports ITU-T G.812 Type IV clocks
• Supports ETSI ETS 300 011, TBR 4, TBR 12 and TBR 13 timing
for E1 interface
• Selectable reference inputs: 8 kHz, 1.544 MHz, 2.048 MHz or
19.44 MHz
• Accepts two independent reference inputs which may have
same or different nominal frequencies applied to them
• Provides C1.5o, C3o, C2o, C4o, C6o, C8o, C16o, C19o, C32o and
C155 output clock signals
• Provides 7 types of 8 kHz framing pulses: F0o, F8o, F16o,
F19o,F32o, RSP and TSP

• Provides a C2/C1.5 output clock signal with the frequency
controlled by the selected reference input Fref0 or Fref1
• Holdover frequency accuracy of 0.025 ppm
• Phase slope of 5 ns per 125 µs
• Attenuates wander from 2.1 Hz
• Fast lock mode
• Provides Time Interval Error (TIE) correction
• MTIE of 600 ns
• JTAG boundary scan
• Holdover status indication
• Freerun status indication
• Normal status indication
• Lock status indication
• Input reference quality indication
• 3.3 V operation with 5 V tolerant I/O
• Package available: 56-pin SSOP (Green option available)

DESCRIPTION
The 82V3155 is an enhanced T1/E1/OC3 WAN PLL with dual
reference inputs. It contains a Digital Phase-Locked Loop (DPLL), which
generates low jitter ST-BUS, 19.44 MHz and 155.52 MHz clock and
framing signals that are phase locked to an 8 kHz, 1.544 MHz, 2.048
MHz or 19.44 MHz input reference.
The 82V3155 provides 10 types of clock signals (C1.5o, C3o,
C6o, C2o, C4o, C8o, C16o, C19o, C32o, C155) and 7 types of framing
signals (F0o, F8o, F16o, F19o, F32o, RSP, TSP) for multitrunk T1/E1
and STS3/OC3 links.
The IDT82V3155 is compliant with AT&T TR62411, Telcordia GR1244-CORE Stratum 3, Stratum 4 Enhanced, Stratum 4, OC-3 port,
155.52 Mbit/s application and ETSI ETS 300 011, ITU-T G.813 Option 1,
and ITU-T G.812 Type IV clocks. It meets the jitter/wander tolerance,
jitter/wander transfer, intrinsic jitter/wander, frequency accuracy, capture
range, phase change slope, holdover frequency accuracy and MTIE
(Maximum Time Interval Error) requirements for these specifications.
The 82V3155 can be used in synchronization and timing control for
T1, E1 and OC3 systems, or used as ST-BUS clock and frame pulse
source. It also can be used in access switch, access routers, ATM edge
switches, wireless base station controllers, or IADs (Integrated Access
Devices), PBXs, line cards and SONET/SDH equipments.