SNAS823A october   2021  – april 2023 LMK1D1212 , LMK1D1216

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
  8. 8 Parameter Measurement Information
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Fail-Safe Input and Hysteresis
      2. 9.3.2 Input Mux
    4. 9.4 Device Functional Modes
      1. 9.4.1 LVDS Output Termination
      2. 9.4.2 Input Termination
  10. 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 Examples
  11. 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
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

9.4 Device Functional Modes

The two inputs of the LMK1D121x are internally muxed together and can be selected through the control pin (see Table 9-2). Unused inputs can be left floating to reduce overall component cost. Both AC- and DC-coupling schemes can be used with the LMK1D121x to provide greater system flexibility.

Table 9-2 Input Selection
IN_SELACTIVE CLOCK INPUT
0IN0_P, IN0_N
1IN1_P, IN1_N
OpenNone(1)
(1) The input buffers are disabled and the outputs are static.

The output amplitude of the banks of the LMK1D121x can be selected through the amplitude selection pin (see Table 9-3). The higher output amplitude mode (boosted swing LVDS mode) can be used in applications which require higher amplitude either for better noise performance (higher slew rate) or if the receiver has swing requirements which the standard LVDS swing cannot meet.

Table 9-3 Amplitude Selection
AMP_SELOUTPUT AMPLITUDE (mV)
0Bank 0: boosted LVDS swing (500 mV)
Bank 1: standard LVDS swing (350 mV)
OPENBank 0: standard LVDS swing (350 mV)
Bank 1: standard LVDS swing (350 mV)
1Bank 0: boosted LVDS swing (500 mV)
Bank 1: boosted LVDS swing (500 mV)