IDT82V3012

The lDT82V3012 can be used in synchronization and timing control for T1, E1 and OC3 systems, or used as ST-BUS clock and frame pulse source. IDT82V3012 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. The lDT82V3012 is a T1/E1/OC3 WAN PLL with dual reference inputs.  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 lntenral Error) requirements for these specincations. It contains a digital phase-locked loop which generates low jitter ST-BUS and 19.44 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 lDT82V3012 provides 9 types of clock signals(C1.5o, C3o, C6o, C2o)and 7 types of framing signals (F8o, FM, F19o) for multitrunk wet and STS3/OC3 links. The lDT82V3012 is compliant with AT&T TR62411, Telcordia GR-1244-CORE Stratum 3, Stratum 4 Enhanced and Stratum 4, ETSI ETS 300 011, ITU-T G.813 Option 1, and ITU-T G.812 Type IV clocks.

The features of IDT82V3012 can be summarized as (1)provides a C2/C1.5 output clock signal with the frequency controlled by the selected reference input Fref0 or Fref1; (2)supports AT&T TR62411 and telcordia GR-1244-CORE stratum 3, stratum 4 enhanced and stratum 4 timing for DS1 interfaces; (3)holdover frequency accuracy of 0.025 ppm; (4)phase slope of 5 ns per 125 PA; (5)supports ITU-T G.813 option 1 clocks; (6)attenuates wander from 2.1 Hz; (7)supports ITU-T G.812 Type IV clocks; (8)fast lock mode; (9)supports ETSI ETS 300 011, TBR 4, TBR 12 and TBR 13 timing for E1 interface; (10)provides time interval error (TIE) correction; (11)MTIE of 600 ns; (12)selectable reference inputs: 8 kHz, 1.544 MHz, 2.048 MHz or 19.44 MHz; (13)JTAG boundary scan; (14)holdover status indication; (15)accepts two independent reference inputs which may have same or different nominal frequencies applied to them; (16)freerun status indication; (17)normal status indication; (18)provides C1.5o, C3o, C2o, C4o, C6o, C8o, C16o, C19o and C32o output clock signals; (19)lock status indication; (20)input reference quality indication; (21)provides 7 types of 8 kHz framing pulses: F0o, F8o, F16o, F19o, F32o, RSP and TSP; (22)3.3 V operation with 5 V tolerant I/O; (23)package available: 56-pin SSOP.

The absolute maximum ratings of IDT82V3012 are (1)power supply voltage: -0.5 to 5.0V; (2)voltage on any pin with respect to ground: -0.5 to 5.5V; (3)package power dissipation: 200mW; (4)storage temperature: -55to 125°C(Note: Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of thedevice at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.).