LTC4313CDD-2#PBF

Signal Buffers, Repeaters, Splitters Overview

The LTC4313CDD-2#PBF is a hot swappable 2-wire bus buffer manufactured by Analog Devices Inc. It provides bidirectional buffering for I2C and SMBus signals while maintaining a high noise margin up to 0.3 • VCC. The device supports level translation between 3.3V and 5V busses. Key electrical parameters include an input supply voltage range of 2.9V to 5.5V, an operating temperature range of 0°C to 70°C, and a maximum I2C frequency of 400kHz. It features a 2.5mA rise time accelerator current source, 10pF input capacitance, and ±4kV human body model ESD ruggedness. The component is housed in an 8-lead (3mm × 3mm) plastic DFN package.

Signal Buffers, Repeaters, Splitters Feature Summary

• Provides bidirectional buffering with high noise margin for interoperability with non-compliant I2C devices
• Includes 2.5mA rise time accelerator current sources to reduce bus rise times in heavily loaded systems
• Supports live board insertion and removal through precharge circuits and low input capacitance
• Features automatic stuck bus disconnect and recovery logic to free locked communication lines

Signal Buffers, Repeaters, Splitters Applications

• Bidirectional buffering to increase fanout on I2C and SMBus networks
• Live board insertion and removal in telecommunications systems including ATCA
• Level translation between 3.3V and 5V bus segments
• Capacitance buffering and bus extension for servers and PMBus applications

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific ordering suffix #PBF indicates lead-free finish and RoHS compliance as per manufacturer standards. Confirm the DD8 package designation matches the required 8-lead (3mm × 3mm) plastic DFN footprint for PCB layout compatibility. Ensure the C grade temperature rating aligns with the intended operational environment constraints.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this variant over the LTC4313-1 if a fixed 2.5mA pull-up current is preferred over the slew-limited switch mode. Choose the C grade version for commercial temperature ranges rather than industrial specifications. Consider the LTC4313-3 only if lower voltage level translation below 2.9V is required, as this model lacks rise time accelerators.

Signal Buffers, Repeaters, Splitters Part Context

This component belongs to the LTC4313 family of 2-wire bus buffers. It shares core functionalities like hot swap capability and stuck bus recovery with the LTC4313-1 and LTC4313-3 models. The primary distinction lies in the rise time accelerator configuration and supported voltage levels, differentiating it within the series based on specific system loading and interface requirements.

Signal Buffers, Repeaters, Splitters Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.