RC38612A001GN2#KB0

Overview

The RC38612A001GN2#KB0 is a fixed-function clock generator from the FemtoClock Jitter Attenuator family, designed for Ethernet and SONET/SDH applications. It features five differential inputs and twelve differential outputs, supporting input frequencies up to 1 GHz. The device integrates eight PLLs to provide precise frequency synthesis with low jitter performance. It operates on a single supply voltage ranging from 1.71V to 3.465V and functions within an ambient temperature range of -40°C to +85°C. Packaged in a 72-VFQFPN (10x10 mm) exposed pad surface-mount case, it supports various input/output standards including CML, LVDS, HCSL, and LVPECL.

Feature Summary

• Five differential inputs and twelve differential outputs with a 5:12 input-to-output ratio
• Integrates eight PLLs for flexible frequency domain generation
• Supports multiple input/output formats: CML, CMOS, HCSL, LVDS, PECL, HSTL, LVCMOS, SSTL, and LVPECL
• Operates at frequencies up to 1 GHz with a supply voltage of 1.71V to 3.465V

Applications

• Ethernet network synchronization
• SONET/SDH timing systems
• Telecom switch line cards
• Wireless small cell infrastructure

Procurement Notes

Verify the specific ordering suffix #KB0 against official Renesas documentation to confirm package type, tape-and-reel quantity, and RoHS compliance status. Confirm that the fixed-function configuration matches the design requirements, as this part number does not support user reconfiguration via I2C or OTP memory unlike programmable variants.

Selection Notes

Select this component when a fixed 5:12 frequency ratio is required for high-speed serial data applications. Ensure the system design accommodates the 72-VFQFPN package thermal dissipation needs. Verify that the available input clock sources match the supported formats (CML, LVDS, etc.) and that the output load requirements align with the specified drive capabilities for CML/LVPECL interfaces.

Part Context

This model belongs to the FemtoClock Jitter Attenuator series, which provides ultra-low jitter clock regeneration and distribution. Unlike the programmable FemtoClock 3 series, this fixed-function variant offers a pre-configured solution for specific timing architectures, simplifying design implementation for standard telecom and networking protocols without requiring external configuration tools.

Replacement Considerations

For pin-compatible alternatives, consider other fixed-function jitter attenuators in the same VFQFPN-72 package family. If programmability is required, the RC223xxA FemtoClock 3 series offers similar output counts but requires configuration. Verify electrical compatibility regarding supply voltage ranges and output swing levels before substitution.