The DS92LV2421 (Serializer) / DS92LV2422 (Deserializer) 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 interconnect cost for transferring a 24-bit or less, bus over FR-4 printed circuit board backplanes, and balanced cables.
In addition to the 24-bit data bus interface, the DS92LV2421 and DS92LV2422 also features a 3-bit control bus for slow speed signals. This allows implementing 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 DS92LV2421, DS92LV2422 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.
24–Bit Data, 3–Bit Control, 10 – 75 MHz Clock
AC Coupled STP Interconnect Cable up to 10 Meters
Integrated Terminations on Ser and Des
AT-SPEED Link BIST Mode and Reporting Pin
Optional I2C Compatible Serial Control Bus
Power Down Mode Minimizes Power Dissipation
1.8V or 3.3V 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