Interface I2C and SMBus Bus Buffers and Accelerators

LTM2883 - SPI/Digital or I2C μModule Isolator with Adjustable ±12.5V and 5V Regulated Power
more options

LTC4314 - Pin-Selectable, 4-Channel, 2-Wire Multiplexer with Bus Buffers

Features

  • 1:4 Multiplexer/Switch for 2-Wire Bus
  • Bidirectional Buffer for SDA and SCL Lines
  • High Noise Margin with VIL = 0.3•VCC
  • ENABLE Pins Connect SDA and SCL Lines
  • Selectable Rise Time Accelerator Current and Activation Voltage
  • 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 (HBM) ESD Ruggedness
  • 20-Lead SSOP and 3mm × 4mm QFN Packages

Typical Application

LTC4314 Typical Application
LTC4314 Typical Application

Description

The LTC4314 is a hot-swappable 4-channel 2-wire bus multiplexer that allows one upstream bus to connect to any combination of downstream busses or channels. An individual enable pin controls each connection. The LTC4314 provides bidirectional buffering, keeping the upstream bus capacitance isolated from the downstream bus capacitances. The high noise margin allows the LTC4314 to be interoperable with I2C devices that drive a high VOL (> 0.4V). The LTC4314 supports level translation between 1.5V, 1.8V, 2.5V, 3.3V and 5V busses. The hot-swappable nature of the LTC4314 allows I/O card insertion into, and removal from, a live backplane without corruption of the data and clock busses.

If both data and clock are not simultaneously high at least once in 45ms and DISCEN is high, a FAULT signal is generated indicating a stuck bus low condition, the input is disconnected from all enabled output channels, and up to 16 clocks are generated on the enabled downstream busses. A three state ACC pin enables input and output side rise time accelerators of varying strengths and sets the VIL,RISING voltage.

Packaging

For complete and up to date package information and drawings, please refer to our packaging page

SSOP-20, QFN-20

LTC4314 Package Drawing
LTC4314 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LTC4314CGN#PBF SSOP 20 C $3.79 $2.65 View
LTC4314CGN#TRPBF SSOP 20 C $2.71 View
LTC4314CUDC#PBF QFN 20 C $3.79 $2.65 View
LTC4314CUDC#TRPBF QFN 20 C $2.71 View
LTC4314IGN#PBF SSOP 20 I $4.35 $3.05 View
LTC4314IGN#TRPBF SSOP 20 I $3.11 View
LTC4314IUDC#PBF QFN 20 I $4.35 $3.05 View
LTC4314IUDC#TRPBF QFN 20 I $3.11 View
Buy Now • Request Samples
* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Click here to view our complete list of demo boards

Applications

  • Telecommunications Systems Including ATCA
  • Address Expansion
  • Level Translator
  • Capacitance Buffers/Bus Extender
  • Live Board Insertion
  • PMBus

People Who Viewed This Product Also Viewed

Product Notifications

Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.

Forgot your password? Click here.
Need help? Email mylinear@linear.com with questions and comments.

Simulate

LTspice IV is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. To download LTspice IV and other FREE simulation tools, please visit our Design Simulation page.

Technical Support