MC100EL57DR2

Overview

The MC100EL57DR2G is a fully differential 4:1 multiplexer from the onsemi 100 Series, designed for high-speed ECL applications. It operates in PECL mode with VCC ranging from 4.2 V to 5.7 V (VEE = 0 V) and NECL mode with VEE ranging from -4.2 V to -5.7 V (VCC = 0 V). The device features internal input pulldown resistors of 75 kΩ and provides multiple VBB outputs for single-ended or AC-coupled interfaces. Propagation delay ranges from 350 ps to 580 ps depending on the signal path and temperature. It supports a maximum toggle frequency exceeding 2 GHz and includes temperature compensation for stable performance across an operating temperature range of -40°C to +85°C.

Feature Summary

• Configurable as either a 4:1 or 2:1 multiplexer by leaving the SEL1 line open or pulling it low via internal pulldown resistors.
• Provides internally generated VBB reference voltage outputs suitable for single-ended inputs and AC-coupled interface rebiasing.
• Includes internal input pulldown resistors on all inputs to ensure defined states and prevent floating conditions.
• Outputs default to LOW when inputs are open or at VEE, enhancing system reliability during undefined states.

Applications

• High-speed data routing in communication systems
• Clock distribution networks requiring low skew
• Signal selection in complex digital processing architectures

Procurement Notes

Verify the specific ordering suffix 'R2G' corresponds to the tape and reel packaging configuration required for your assembly process. Confirm that the part number matches the 100 Series specifications rather than the 10 Series, as electrical characteristics such as power supply current and propagation delays differ between series. Ensure compatibility with SOIC-16 surface mount mounting standards.

Selection Notes

Select this component when a fully differential ECL multiplexer with integrated VBB generation is required. It is suitable for designs needing flexible 4:1 or 2:1 configuration without external pull-down components. Consider the 100 Series thermal and electrical characteristics if operation near the upper temperature limits or higher power consumption is anticipated compared to the standard 10 Series.

Part Context

This device belongs to the MC10/100EL57 family of 5V ECL differential multiplexers. The 100 Series variant offers specific DC and AC characteristics distinct from the 10 Series, including variations in power supply current and propagation delay tolerances. It is housed in a lead-free, halogen-free SOIC-16 package compliant with RoHS standards.

Replacement Considerations

MC10EL57DG and MC100EL57DG are discontinued versions of this device. Direct functional substitutes within the same family include MC10EL57DR2G, though verification of the specific series (10 vs 100) is necessary due to parameter differences.

FAQ

How does the device function as a 2:1 multiplexer?

By leaving the SEL1 line open, the internal pulldown resistors pull it low. This configures the device to use only the SEL0 input to select between data inputs D0 and D1.

What is the purpose of the VBB pins?

The VBB pins provide an internally generated reference voltage used for single-ended input conditions or to rebias AC-coupled inputs. They should be decoupled with a 0.01 μF capacitor when in use.