8T49N240 FemtoClock® NG Universal Frequency Translator

IDT's 8T49N240 flexible timing solution provides valuable design margin for 10 Gbps and 40/100 Gbps multi-lane interfaces

Image of  IDT's 8T49N240 FemtoClock® NG Universal Frequency TranslatorIntegrated Device Technology features their highly programmable clock generator and jitter attenuator IC featuring less than 200 fs of phase noise, providing valuable system design margin for 10 Gbps interfaces in wireline and wireless communication networks. The additional phase noise margin eases system design constraints, allowing engineers to minimize bit error rates (BER) while lowering overall system costs.

The 8T49N240 features the ability to produce virtually any common output frequency from virtually any input frequency. The highly flexible, high-performance clock generator and jitter attenuator is ideal for 10 Gbps or multi-lane 40 Gbps and 100 Gbps timing applications where 300 fs of phase noise is typically the maximum acceptable amount allowed at the physical ports. The 200 fs phase noise specification of the 8T49N240 provides ample noise margin, enabling engineers to simplify their clock tree designs and utilize lower cost PCBs.

The 8T49N240 is complemented by IDT's proven Timing Commander™ software – a free, intuitive program that allows users to configure the device with ease by simply clicking on blocks, entering desired values, and sending the configuration to the device. IDT also offers a web-based tool that allows customers to generate custom part numbers in seconds to match their specific configurations.

The 8T49N240 features a 6 mm x 6 mm package footprint, requiring considerably less PCB area than most other solutions with this level of performance and flexibility. The device is also suitable for 25 Gbps and 28 Gbps interfaces.

Features and Benefits
  • Sub-200 fs phase jitter (12 kHz to 20 MHz)
  • Small 6 mm x 6 mm 40-VFQFN package
  • Clock synthesizer and generator or jitter attenuator modes via register control
  • Any frequency-in and frequency-out
  • Dual inputs with loss-of-signal monitors and flexible switchover options
  • Four differential outputs 8 kHz to 867 MHz
  • LVDS, LVPECL, or HCSL
  • Configurable as 2x LVCMOS
  • OTP memory allows device to boot in desired state with no SW intervention
  • Sub-200 fs performance provides margin for 10 Gbps PHYs and switches
  • Allows fan-out buffers to be used, saving system cost
  • Simpler signal isolation techniques including simpler and lower-cost PCB stack-ups
  • Small size gives placement flexibility, simplifying layout
  • Flexibility facilitates reuse, saving design time and reducing SKU management costs
  • Redundancy model for simpler design of fault-tolerant systems
  • Three integer and one fractional output divider
Applications
  • 10 G, 40 G, and 100 G routers
  • Radio-access networks backhaul
  • 40 G and 100 G datacenter switches where redundancy is required
  • OTU2 and OTU3 OTN muxponders
  • Xilinx Virtex® UltraScale™ FPGAs

8T49N240 FemtoClock® NG Universal Frequency Translator

ImageManufacturer Part NumberDescriptionPLLInputDifferential - Input:OutputAvailable QuantityView Details
8T49N240-991NLGI datasheet linkULTRA-PERFORMANCE JITTER ATTENUA8T49N240-991NLGIULTRA-PERFORMANCE JITTER ATTENUAYesLVCMOS, LVDS, LVHSTL, LVPECL, CrystalYes/Yes464 - Immediate
8T49N240-991NLGI product page link
Published: 2017-10-06