SNLS285H April   2008  – May 2016 LMH0303

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics - DC
    6. 6.6 Electrical Characteristics - AC
    7. 6.7 Timing Requirements
    8. 6.8 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Loss-of-Signal Detector
      2. 7.3.2 Input Interfacing
      3. 7.3.3 Output Interfacing
      4. 7.3.4 Output Slew Rate Control
      5. 7.3.5 Cable Fault Detection
      6. 7.3.6 SMBus Interface
        1. 7.3.6.1 Transfer of Data through the SMBus
        2. 7.3.6.2 SMBus Transactions
          1. 7.3.6.2.1 Writing a Register
          2. 7.3.6.2.2 Reading a Register
        3. 7.3.6.3 Communicating With Multiple LMH0303 Cable Drivers through the SMBus
    4. 7.4 Device Functional Modes
    5. 7.5 Register Maps
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 General Guidance for All Applications
      2. 8.1.2 Cable Fault Detection Operation
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Community Resources
    2. 11.2 Trademarks
    3. 11.3 Electrostatic Discharge Caution
    4. 11.4 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

5 Pin Configuration and Functions

RUM Package
16-Pin WQFN
Top View

Pin Functions

PIN TYPE(1) DESCRIPTION
NO. NAME
1 SDI I Serial data true input.
2 SDI I Serial data complement input.
3 VEE I Negative power supply (ground)
4 RREF I Bias resistor. Connect a 750-Ω resistor to VCC.
5 RSTI I Reset input. RSTI has an internal pullup, LVCMOS, 2-state logic.
H = Normal operation.
L = Device reset. The device operates with default register settings. Forcing RSTI low also forces RSTO low.
6 ENABLE I Output driver enable, LVCMOS, 2-state logic. ENABLE has an internal pullup.
H = Normal operation.
L = Output driver powered off.
7 SDA I/O SMBus bidirectional data pin, LVCMOS, 2-state logic, open drain. When functioning as an output, it is open drain. This pin requires an external pullup.
8 SCL I SMBus clock input, LVCMOS, 2-state logic, open drain. SCL is input only. This pin requires an external pullup.
9 VCC P Positive power supply (3.3 V)
10 SD/HD I Output slew rate control, LVCMOS, 2-state logic. SD/HD has an internal pulldown.
H = Output rise or fall time complies with ST 259.
L = Output rise or fall time complies with ST 424 or 292.
11 SDO O Serial data complement output.
12 SDO O Serial data true output.
13 FAULT O Fault open drain output flag, LVCMOS, 2-state logic, open drain. Requires external pullup resistor and may be wire ORed with multiple cable drivers.
H = Normal operation.
L = Loss of signal or termination fault for any output.
14 NC — No connect. Not bonded internally.
15 NC — No connect. Not bonded internally.
16 RSTO O Reset output, LVCMOS, 2-state logic. RSTO is automatically set to 1 when register 0 is written. It can be reset back to zero by forcing RSTI to zero to reset the device. Used to daisy chain multiple cable drivers on the same SMBus.
— EP G EP is the exposed pad at the bottom of the WQFN package. The exposed pad must be connected to the ground plane through a via array.
(1) G = Ground, I = Input, O = Output, and P = Power