1 Features

• 24-Bit Data, 3-Bit Control, 10- to 75-MHz Clock
• AC-Coupled STP Interconnect Cable up to 10 m
• Integrated Terminations on Serializer and Deserializer
• At-Speed Link BIST Mode and Reporting Pin
• Optional I²C-Compatible Serial Control Bus
• Power-Down Mode Minimizes Power Dissipation
• 1.8-V or 3.3-V Compatible LVCMOS I/O Interface
• –40° to 85°C Temperature Range
• >8-kV HBM
• Serializer (DS92LV2421)
  • Data Scrambler for Reduced EMI
  • DC-Balance Encoder for AC Coupling
  • Selectable Output VOD and Adjustable
    De-emphasis
• Deserializer (DS92LV2422)
  • Fast Random Data Lock; No Reference Clock Required
  • Adjustable Input Receiver Equalization
  • LOCK (Real-Time Link Status) Reporting Pin
  • EMI Minimization on Output Parallel Bus (SSCG)
  • Output Slew Control (OS)

2 Applications

• Embedded Videos and Displays
• Medical Imaging and Factory Automation
• Office Automation (Printers and Scanners)
• Security and Video Surveillance
• General-Purpose Data Communication

3 Description

The DS92LV242x chipset translates a parallel 24–bit LVCMOS data interface into a single high-speed CML serial interface with embedded clock information. This single serial stream eliminates skew issues between clock and data, reduces connector size, and reduces interconnect cost for transferring a 24-bit or less bus over FR-4 printed-circuit board backplanes and balanced cables. In addition, the DS92LV242x chipset also features a 3-bit control bus for slow speed signals. This allows for video and display applications with up to 24 bits per pixel (RGB).

Programmable transmit de-emphasis, receive equalization, on-chip scrambling, and DC balancing enables longer distance transmission over lossy cables and backplanes. The DS92LV2422 automatically locks to incoming data without an external reference clock or special sync patterns, providing easy plug-and-go operation. EMI is minimized by the use of low voltage differential signaling, receiver drive strength control, and spread spectrum clocking capability.

The DS92LV242x chipset is programmable though an I²C interface as well as through pins. A built-in, at-speed BIST feature validates link integrity and may be used for system diagnostics. The DS92LV2421 is offered in a 48-pin WQFN, and the DS92LV2422 is offered in a 60-pin WQFN package. Both devices operate over the full industrial temperature range of –40°C to 85°C.

1. For all available packages, see the orderable addendum at the end of the data sheet.

Typical Application Block Diagram