Texas Instruments LMK04906 Clock Jitter Cleaner/Multiplier

Texas Instruments LMK04906 Clock Jitter Cleaner/Multiplier provides superior clock jitter cleaning, generation, and distribution with advanced features to meet high-performance timing application needs. The LMK04906 accepts 3 clock inputs ranging from 1kHz to 750MHz. It generates 6 unique clock output frequencies ranging from 2.26MHz to 2.6GHz. The LMK04906 can also buffer a crystal or VCXO to generate a 7th unique clock frequency. The device provides virtually all frequency translation combinations required for SONET, Ethernet, Fibre Channel, and multi-mode Wireless Base Stations. The LMK04906 input clock frequency and clock multiplication ratio are programmable through an SPI interface.

Features

Ultra-low RMS jitter performance:
- 100fs RMS jitter (12kHz to 20MHz)
- 123fs RMS jitter (100Hz to 20MHz)
Dual loop PLLatinum™ PLL architecture:
- PLL1:
- Integrated low-noise crystal oscillator circuit
- Holdover mode when input clocks are lost
  - Automatic or manual triggering/recovery
- PLL2:
  - Normalized [1Hz] PLL noise floor of -227dBc/Hz
  - Phase detector rate up to 155MHz
  - OSCin frequency-doubler
  - Integrated low-noise VCO
3 Redundant input clocks with LOS:
- Automatic and manual switch-over modes

50% Duty cycle output divides, 1 to 1045 (even and odd)
LVPECL, LVDS, or LVCMOS programmable outputs
Precision digital delay, fixed or dynamically adjustable
25ps Step analog delay control
6 Differential outputs with up to 12 single-ended
- Up to 5 VCXO/crystal buffered outputs
Clock rates of up to 2600MHz
0 Delay mode
Three default clock outputs at power-up
Dual PLL, single PLL, and clock distribution multi-modes
-40 to 85°C Industrial temperature range
3.15V to 3.45V operation
64-Pin WQFN (9.0mmx9.0mmx0.8mm) package