8432CY-51LFT

Clock Generators, PLLs, Frequency Synthesizers Overview

The 8432CY-51LFT is a FemtoClock LVPECL crystal-to-LVPECL clock synthesizer manufactured by Renesas Electronics. It converts an external crystal input into three differential LVPECL outputs at 3.3V. The device supports frequencies of 75MHz, 100MHz, and 150MHz with selectable spread spectrum clocking (SSC) for EMI reduction. It operates within a commercial temperature range of 0°C to 70°C and is housed in an 8-pin SOIC package. This component is designed for high-performance timing applications requiring low jitter.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Converts crystal input to three differential LVPECL outputs
• Supports selectable output frequencies: 75MHz, 100MHz, 150MHz
• Features up/down/center spread spectrum clocking for EMI mitigation
• Operates on a single 3.3V supply voltage

Clock Generators, PLLs, Frequency Synthesizers Applications

• SAS-2 interconnect systems
• Serial SCSI Protocol (SSP) controllers
• Serial ATA Tunneled Protocol (STP) devices
• Serial Management Protocol (SMP) implementations

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific suffix 'LFT' indicates tape-and-reel packaging versus 'LF' tube packaging when sourcing. Confirm RoHS compliance status as manufacturing processes may evolve. Check current lifecycle status as older FemtoClock models may be discontinued or subject to limited availability constraints from authorized distributors.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when differential LVPECL outputs are required for SAS-2 compliant designs. Ensure the system requires one of the fixed frequency options (75, 100, or 150 MHz). Verify that the 3.3V logic level matches the receiving ASIC or FPGA inputs. Consider thermal management if operating near the upper limit of the 0°C to 70°C range.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Renesas FemtoClock family, known for low-jitter silicon timing solutions. It serves as a dedicated clock generator for storage interface protocols. The device integrates the necessary PLL circuitry to stabilize the external crystal reference and distribute clean clock signals to multiple endpoints.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements include other FemtoClock SAS/SATA generators such as the 843241 series. Verify pin compatibility and output voltage levels (2.5V vs 3.3V) when substituting. Cross-reference datasheets for identical jitter specifications and SSC capabilities to ensure signal integrity is maintained.