Description
The MK2049-34A is a VCXO Phased Locked Loop (PLL) based clock synthesizer that accepts multiple input frequencies. With an 8 kHz clock input as a reference, the MK2049-34A generates T1, E1, T3, E3, ISDN, xDSL, and other communications frequencies. This allows for the generation of clocks frequency-locked and phase-locked to an 8 kHz backplane clock, simplifying clock synchronization in communications systems. The MK2409-34 can also accept a T1 or E1 input clock and provide the same output for loop timing. All outputs are frequency locked together and to the input.

Features
• Packaged in 20-pin SOIC
• 3.3 V + 5% operation
• Fixed I/O phase relationship on all selections
• Meets the TR62411, ETS300 011, and GR-1244 specification for MTIE, Pull-in/Hold-in Range, Phase Transients, and Jitter Generation for Stratum 3, 4, and 4E
• Accepts multiple inputs: 8 kHz backplane clock, Loop Timing frequencies, or 10 to 36 MHz
• Locks to 8 kHz + 100 ppm (External mode)
• Buffer Mode allows jitter attenuation of 10 to 36 MHz input and x1/x0.5 or x2/x4 outputs
• Exact internal ratios enable zero ppm error
• Output clock rates include T1, E1, T3, E3, ISDN, xDSL, and the OC3 submultiples
• See the MK2049-01, -02, and -03 for more selections at 5 V