LTC4303CMS8#PBF

Signal Buffers, Repeaters, Splitters Overview

The LTC4303CMS8#PBF is a hot swappable 2-wire bus buffer manufactured by Analog Devices Inc. It supports I²C, I²C Fast-Mode, and SMBus standards with operation up to 600 kHz. The device operates on a supply voltage (VCC) ranging from 2.7 V to 5.5 V and draws a typical supply current of 6 mA. It features automatic disconnection when SDA or SCL lines remain low for 30 ms or more, followed by automatic clocking to recover the bus. The component includes rise-time accelerators, 1 V precharge circuitry, and ±15 kV ESD protection. It is housed in an 8-pin MSOP package and functions within a commercial temperature range of 0 °C to +70 °C.

Signal Buffers, Repeaters, Splitters Feature Summary

• Provides bidirectional buffering for SDA and SCL lines while isolating backplane and card capacitances during live insertion.
• Automatically disconnects data and clock connections if lines are stuck low for 30 ms or longer.
• Recovers stuck buses by generating up to 16 automatic clock pulses on the SCLOUT line.
• Includes rise-time accelerator circuitry to support larger pull-up resistors and extended bus capacitance.

Signal Buffers, Repeaters, Splitters Applications

• Hot board insertion into live backplanes
• Servers
• RAID systems
• Capacitance buffering and bus extension

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific ordering suffix #PBF indicates lead-free compliance and confirm the package type matches the design requirements. Ensure the commercial temperature grade (C) aligns with the operational environment limits. Cross-reference the manufacturer part number with official distributor catalogs to validate availability and authenticity before finalizing procurement orders.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component for applications requiring isolation between backplane and I/O card capacitances during hot swapping. It is suitable for systems needing automatic recovery from stuck bus conditions without external intervention. Verify that the required operating frequency does not exceed 600 kHz and that the supply voltage remains within the 2.7 V to 5.5 V range.

Signal Buffers, Repeaters, Splitters Part Context

This part belongs to the LTC4303 series of 2-wire bus buffers. It is pin-compatible with the LTC4300A-1. The CMS8 designation identifies the specific temperature grade and MSOP-8 package variant within the broader product family designed for I²C and SMBus interface protection.

Signal Buffers, Repeaters, Splitters Replacement Considerations

LTC4300A-1 is a pin-compatible alternative within the same family.