Texas Instruments LMK03328 Ultra-Low Jitter Clock Generators

Texas Instruments LMK03328 Ultra-Low Jitter Clock Generators include two fractional-N frequency synthesizers with integrated VCOs, flexible clock distribution/fanout, and pin-selectable configuration states. The device can generate multiple clocks for various multi-gigabit serial interfaces and digital devices. This reduces BOM cost and board area and improves reliability by replacing multiple oscillators and clock distribution devices. The ultra-low-jitter reduces Bit Error Rate (BER) in high-speed serial links.

Features

Ultra-low noise, high performance:
- Jitter: 100fs RMS typical, F_out > 100MHz
- PSRR: -70dBc, robust supply noise immunity
Flexible device options:
- Up to 8 AC-LVPECL, AC-LVDS, AC-CML, HCSL or LVCMOS outputs or any combination
- Pin mode, I²C mode, and EEPROM mode
- 71-pin selectable pre-programmed default startup options
Dual inputs with an automatic or manual selection:
- Crystal input: 10 to 52MHz range
- External input: 1 to 300MHz range

Frequency margining options:
- Fine frequency margining (±50ppm typical) using low-cost pullable crystal reference
- Glitchless coarse frequency margining (%) using output dividers
Other features:
- Supply: 3.3V core, 1.8/2.5/3.3V output supply
- Industrial temperature range (-40°C to 85°C)
- Package: 7mm x 7mm 48-QFN