DS92LV1021TMSA

Overview

The DS92LV1021TMSA is a 10-bit Bus LVDS serializer manufactured by Texas Instruments. It converts a 10-bit parallel LVCMOS/LVTTL data bus into a single high-speed serial LVDS stream with an embedded clock. The device operates at clock frequencies between 16 MHz and 40 MHz, achieving a payload data rate of up to 400 Mbps. It utilizes a 28-lead SSOP package and functions within a supply voltage range of 3.0 V to 3.6 V. The operating temperature range spans from -40°C to +85°C.

Feature Summary

• Converts 10-bit parallel data into a single differential serial stream with embedded clock bits
• Supports programmable edge triggering on the transmit clock input
• Includes powerdown mode for reduced supply current consumption
• Features flow-through pinout to simplify printed circuit board layout

Applications

• Data transmission over differential backplanes
• Point-to-point connections via Unshielded Twisted Pair (UTP) cable
• Multi-drop bus systems requiring synchronization patterns

Procurement Notes

Verify component authenticity through authorized distributors or TI directly. Confirm RoHS compliance status as older revisions may differ. Check for obsolescence notices since this part number is listed as Not Recommended for New Designs in some contexts. Ensure proper ESD handling protocols are followed during storage and assembly due to MOS gate sensitivity.

Selection Notes

Select this serializer when interfacing 10-bit parallel buses to LVDS links. Ensure the system clock frequency falls within the 16 MHz to 40 MHz range. Verify that the load impedance matches the specified 27Ω to 100Ω requirements. Consider pairing with compatible deserializers like the DS92LV1212A for complete link functionality.

Part Context

This component belongs to the DS92LV1021 family of Bus LVDS serializers. It serves as an upgrade to the original DS92LV1021, offering improved features such as TCLK application before power-up and slower edge rates to reduce reflections. It is designed for high-speed data transfer applications requiring reliable serialization of parallel data streams.

Replacement Considerations

The SN65LV1023ADB is documented as a similar replacement option. Verify functional compatibility and pinout alignment before substitution. Review datasheet specifications for both devices to ensure performance parameters meet design requirements.

FAQ

How does the DS92LV1021TMSA handle clock embedding?

It appends a start bit and a stop bit internally to frame the 10 data bits, creating a 12-bit cycle where the start and stop bits function as embedded clock transitions.

What is the purpose of the SYNC pins?

Asserting the SYNC1 or SYNC2 pins causes the serializer to transmit synchronization patterns (six ones and six zeros) to help the deserializer establish lock.

Can the device be used with UTP cable?

Yes, the serializer is designed to drive data over Unshielded Twisted Pair (UTP) cable in addition to backplanes.