LTC4313

PRODUCTION

2-Wire Bus Buffers with High Noise Margin

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Overview

  • Bidirectional Buffer Increases Fanout
  • High Noise Margin with VIL = 0.3•VCC
  • Compatible with Non-Compliant I2C Devices That Drive a High VOL
  • Strong (LTC4313-1) and 2.5mA (LTC4313-2) Rise Time Accelerator Current
  • Level Shift 1.5V, 1.8V, 2.5V, 3.3V and 5V Busses
  • Prevents SDA and SCL Corruption During Live Board Insertion and Removal from Backplane
  • Stuck Bus Disconnect and Recovery
  • Compatible with I2C, I2C Fast Mode and SMBus
  • ±4kV Human Body Model ESD Ruggedness
  • High Impedance SDA, SCL Pins When Unpowered
  • 8-Lead MSOP and 8-Lead (3mm × 3mm) DFN Packages

The LTC4313 is a hot swappable 2-wire bus buffer that provides bidirectional buffering while maintaining a low offset voltage and high noise margin up to 0.3 • VCC. The high noise margin allows the LTC4313 to be interoperable with devices that drive a high VOL (>0.4V) and allows multiple LTC4313s to be cascaded. The LTC4313-1 and LTC4313-2 support level translation between 3.3V and 5V busses. In addition to these voltages, the LTC4313-3 also supports level translation to 1.5V, 1.8V and 2.5V.

During insertion, the SDA and SCL lines are pre-charged to 1V to minimize bus disturbances. Connection is established between the input and output after ENABLE is asserted high and a stop bit or bus idle condition has been detected on the SDA and SCL pins.

If both data and clock are not simultaneously high at least once in 45ms, the input is disconnected from the output. Up to 16 clock pulses are subsequently generated to free the stuck bus. Rise time accelerators (RTAs) provide pull-up currents on SDA and SCL rising edges to meet rise time specifications in heavily loaded systems. The RTAs are configured as slew limited switches in the LTC4313-1 and 2.5mA current sources in the LTC4313-2. The LTC4313-3 does not have RTAs.

Applications

  • Capacitance Buffers/Bus Extender
  • Live Board Insertion
  • Telecommunications Systems Including ATCA
  • Level Translation
  • PMBus
  • Servers
LTC4313
2-Wire Bus Buffers with High Noise Margin
400kHz Operation Product Package 1 Product Package 2
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Documentation

Data Sheet 1

Reliability Data 1

Technical Articles 1

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Hardware Ecosystem

Parts Product Life Cycle Description
Interface Transceivers & Isolators 1
LTM2883
PRODUCTION SPI/Digital or I2C μModule Isolator with Adjustable ±12.5V and 5V Regulated Power
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Tools & Simulations

IBIS Model 3

Reference Designs

Simplified Circuit Block Diagram
Simplified Circuit Block Diagram
EVAL-CN0409-ARDZ Evaluation Board
EVAL-CN0409-ARDZ Evaluation Board - Top View
EVAL-CN0409-ARDZ Evaluation Board - Bottom View
CN0409 Circuits from the lab

Low to High Level Water Turbidity Measurement System

View Detailed Reference Design

Features and Benefits

  • 0-4000 FTU Measurement
  • +/-0.5 FTU system accuracy (0-1000 FTU)
  • Ambient light rejection
Figure 1. CN0569 Simplified Block Diagram
Figure 1. CN0569 Simplified Block Diagram
EVAL-CN0569-PMDZ Evaluation Board
EVAL-CN0569-PMDZ Evaluation Board - Top View
EVAL-CN0569-PMDZ Evaluation Board - Bottom View
CN0569 Circuits from the lab

Infrared Gesture Recognition Module

View Detailed Reference Design

Features and Benefits

  • Highly Integrated Optical Front End
  • Dual Light Sensors for Intensity and Directionality Measurements
  • Open Source Gesture Detection Algorithm

Part Used

Resources

Design & Integration Tools

Videos

  • lazy blur
    VIDEO · 2022-07-08 01:01
    Infrared Gesture Recognition Module for HMI Applications
CN0409
Low to High Level Water Turbidity Measurement System
Simplified Circuit Block Diagram
EVAL-CN0409-ARDZ Evaluation Board
EVAL-CN0409-ARDZ Evaluation Board - Top View
EVAL-CN0409-ARDZ Evaluation Board - Bottom View
CN0569
Infrared Gesture Recognition Module
Figure 1. CN0569 Simplified Block Diagram
EVAL-CN0569-PMDZ Evaluation Board
EVAL-CN0569-PMDZ Evaluation Board - Top View
EVAL-CN0569-PMDZ Evaluation Board - Bottom View

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