DS8933M

Overview

The DS8933M is a high-speed, low-power CMOS ECL-to-LVDS/LVPECL clock driver manufactured by National Semiconductor. It features a differential ECL input and supports multiple output configurations including LVDS, LVPECL, and HSTL. The device operates with a supply voltage range of 2.375V to 3.63V and delivers an output swing of 800mV for LVDS. It provides a propagation delay of typically 140ps and supports data rates up to 650Mbps. The component is housed in an 8-pin SOIC package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Supports conversion from ECL logic levels to LVDS or LVPECL standards
• Provides high-speed signal integrity with low jitter characteristics
• Features flexible output configuration options for diverse system requirements

Applications

• High-speed serial communication interfaces
• Clock distribution networks in telecommunications equipment
• Data acquisition systems requiring precise timing signals

Procurement Notes

Verify the manufacturer origin as National Semiconductor has been acquired by Texas Instruments. Confirm that the specific part number DS8933M corresponds to legacy documentation or current TI inventory. Ensure the package type matches the required PCB footprint and check for RoHS compliance status relative to the manufacturing date code.

Selection Notes

Select this component when interfacing ECL sources with LVDS receivers. Verify that the power supply voltage aligns with the specified 3.3V nominal range. Consider the thermal performance of the SOIC-8 package if operating at maximum data rates. Ensure the load capacitance on the outputs does not exceed the datasheet limits to maintain signal integrity.

Part Context

This device belongs to the family of high-performance clock drivers designed for demanding digital applications. It bridges the gap between older ECL-based architectures and modern low-voltage differential signaling standards. The component is critical for maintaining signal quality in high-frequency environments where noise immunity is paramount.

Replacement Considerations

Check for direct pin-compatible replacements such as the DS8933AM variant. Consult Texas Instruments documentation for updated equivalents if the original National Semiconductor line is discontinued. Verify electrical parameters match exactly before substituting.