9179BF-01LFT

Clock Buffers, Drivers Overview

The Renesas Electronics 9179BF-01LFT is a low skew fanout buffer designed for SDRAM clock distribution in high-speed microprocessor systems. It provides one input to eighteen outputs with a maximum frequency of 150 MHz. The device operates on a 3.135V to 3.465V supply and features synchronous clocks matched to a 250ps skew window. It utilizes an I2C serial interface for individual output control and includes a tri-state pin for testing. The component is housed in a 48-pin SSOP package and supports surface mount mounting.

Clock Buffers, Drivers Feature Summary

• 1:18 Fanout Buffer for SDRAM clock applications
• I2C Serial Configuration for individual output enable/disable
• Low output-to-output skew (max 250ps)
• Tri-state OE pin for testability

Clock Buffers, Drivers Applications

• High-speed RISC or CISC microprocessor systems
• SDRAM clock buffering for up to four DIMMs
• Feedback to external PLL stages for phase synchronization

Clock Buffers, Drivers Procurement Notes

Verify the specific ordering suffix 'LF' indicates lead-free configuration and RoHS compliance as per the datasheet. Confirm the package type matches the 48-BSSOP (0.295 inch width) specification. Ensure the operating temperature range of 0°C to 70°C aligns with system requirements. Check for any discontinued status or alternative part numbers if availability is constrained.

Clock Buffers, Drivers Selection Notes

Select this component when a low skew, non-inverting buffer is required for SDRAM clock distribution. It is suitable for systems supporting up to four SDRAM DIMMs. The I2C interface allows for dynamic control of individual clock lines to reduce EMI. Ensure the design accommodates the 3.3V nominal supply voltage range of 3.135V to 3.465V.

Clock Buffers, Drivers Part Context

This part belongs to the ICS9179B series of low skew buffers. It is specifically engineered for PentiumPro and Pentium II class processors. The device does not use an internal PLL but can feed external PLLs. It is manufactured by Integrated Circuit Systems, Inc., now part of Renesas Electronics.

Clock Buffers, Drivers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing PCB layout and I2C addressing schemes if considering alternatives.