83948AYI-147LFT

Overview

The Renesas 83948AYI-147LFT is a clock buffer and multiplexer IC featuring a 2:12 input-to-output ratio. It operates with a supply voltage range of 2.375V to 3.465V and supports a maximum frequency of 350 MHz. The device accepts multiple input formats including HCSL, LVCMOS, LVDS, LVHSTL, LVPECL, LVTTL, and SSTL, while providing LVCMOS or LVTTL outputs. Packaged in a 32-LQFP (7x7 mm) surface-mount case, it functions within an industrial temperature range of -40°C to 85°C. This component is classified as obsolete and no longer manufactured.

Feature Summary

• 2:12 fan-out buffer and multiplexer configuration
• Supports differential LVDS inputs with single-ended LVCMOS/LVTTL outputs
• Maximum operating frequency of 350 MHz
• Wide input format compatibility including LVPECL, LVHSTL, and SSTL

Applications

• Clock distribution networks for high-speed digital systems
• Signal buffering for multi-load timing requirements
• Multiplexing clock sources in communication infrastructure

Procurement Notes

This part number is officially obsolete and has been discontinued by the manufacturer. Verification of current availability requires checking authorized distributors for remaining stock or end-of-life inventory. Replacement components should be evaluated based on pin compatibility and electrical specifications to ensure system continuity.

Selection Notes

Designers requiring this specific 2:12 ratio and 350 MHz performance should verify if alternative clock buffers meet the required input/output voltage levels and package constraints. The transition from obsolete status necessitates reviewing pinout compatibility and thermal characteristics of potential substitute devices before integration.

Part Context

The 83948A series belongs to Renesas' clock timing product line, specifically designed for fan-out buffering and signal conditioning. The 'I' suffix typically denotes the industrial temperature grade, while '147' indicates the specific speed bin and package variant within the family.

Replacement Considerations

The onsemi NB3V8312CFAG is identified as a similar replacement option. Engineers must verify functional equivalence regarding input logic families, output drive strength, and pin assignment compatibility before substituting.