SNAS855E November   2023  – August 2025 LMKDB1102 , LMKDB1104 , LMKDB1108 , LMKDB1120

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison
  6. 5 Pin Configuration and Functions
  7. 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
    6. 6.6 SMBus Timing Requirements
    7. 6.7 SBI Timing Requirements
    8. 6.8 Timing Diagrams
    9. 6.9 Typical Characteristics
  8. 7 Parameter Measurement Information
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Input Features
        1. 8.3.1.1 Running Input Clocks When Device is Powered Off
        2. 8.3.1.2 Fail-Safe Inputs
        3. 8.3.1.3 Input Configurations
          1. 8.3.1.3.1 Internal Termination for Clock Inputs
          2. 8.3.1.3.2 AC-Coupled or DC-Coupled Clock Inputs
      2. 8.3.2 Flexible Power Sequence
        1. 8.3.2.1 PWRDN# Assertion and Deassertion
        2. 8.3.2.2 OE# Assertion and Deassertion
        3. 8.3.2.3 Clock Input and PWRGD/PWRDN# Behaviors When Device Power is Off
      3. 8.3.3 LOS and OE
        1. 8.3.3.1 Additional OE# Pins for LMKDB1120 and Backward Compatibility
        2. 8.3.3.2 Synchronous OE
        3. 8.3.3.3 OE Control
        4. 8.3.3.4 Automatic Output Disable
        5. 8.3.3.5 LOS Detection
      4. 8.3.4 Output Features
        1. 8.3.4.1 Double Termination
        2. 8.3.4.2 Programmable Output Slew Rate
          1. 8.3.4.2.1 Slew Rate Control through Pin
          2. 8.3.4.2.2 Slew Rate Control through SMBus
        3. 8.3.4.3 Programmable Output Swing
        4. 8.3.4.4 Accurate Output Impedance
        5. 8.3.4.5 Programmable Output Impedance
        6. 8.3.4.6 Fail-Safe Outputs
    4. 8.4 Device Functional Modes
      1. 8.4.1 SMBus Mode
      2. 8.4.2 SBI Mode
      3. 8.4.3 Pin Mode
  10. 9 Register Maps
    1. 9.1 LMKDB1120 and LMKDB1120FS Registers
    2. 9.2 LMKDB1108 and LMKDB1108FS Registers
    3. 9.3 LMKDB1104 and LMKDB1104FS Registers
  11. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
      3. 10.2.3 Application Curves
    3. 10.3 Power Supply Recommendations
    4. 10.4 Layout
      1. 10.4.1 Layout Guidelines
      2. 10.4.2 Layout Example
  12. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  13. 12Revision History
  14. 13Mechanical, Packaging, and Orderable Information

Package Options

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

8.4.1 SMBus Mode

In SMBus mode, LMKDB11xx device SMBus registers can be written and read through SMBus pins. Pin SADR1 and SADR0 set the SMBus address.

SADR1 SADR0 8-Bit SMBus Address (R/W Bit = 0)
Low Low 0xD8
Low Float 0xDA
Low High 0xDE
Float Low 0xC2
Float Float 0xC4
Float High 0xC6
High Low 0xCA
High Float 0xCC
High High 0xCE

Table 8-7 Command Code Definition
BIT DESCRIPTION
7 0 = Block Read or Block Write operation
1 = Byte Read or Byte Write operation
(6:0) Register address for Byte operations, or starting register address for Block, operations
LMKDB1102 LMKDB1104 LMKDB1104FS LMKDB1108 LMKDB1108FS LMKDB1120 LMKDB1120FS Generic Programming Sequence Figure 8-7 Generic Programming Sequence
LMKDB1102 LMKDB1104 LMKDB1104FS LMKDB1108 LMKDB1108FS LMKDB1120 LMKDB1120FS Byte Write Protocol Figure 8-8 Byte Write Protocol
LMKDB1102 LMKDB1104 LMKDB1104FS LMKDB1108 LMKDB1108FS LMKDB1120 LMKDB1120FS Byte Read Protocol Figure 8-9 Byte Read Protocol
LMKDB1102 LMKDB1104 LMKDB1104FS LMKDB1108 LMKDB1108FS LMKDB1120 LMKDB1120FS Block Write Protocol Figure 8-10 Block Write Protocol
LMKDB1102 LMKDB1104 LMKDB1104FS LMKDB1108 LMKDB1108FS LMKDB1120 LMKDB1120FS Block Read Protocol Figure 8-11 Block Read Protocol