MC100E457FNR2

Overview

The MC100E457FNR2 is a 5 V ECL triple differential 2:1 multiplexer in a 28-lead PLCC package. It features >1.0 GHz bandwidth and 700 ps max propagation delay. Operating ranges include PECL (VCC = 4.2 V to 5.7 V, VEE = 0 V) and NECL (VCC = 0 V, VEE = −4.2 V to −5.7 V). The device includes internal input pulldown resistors, temperature compensation, and ESD protection exceeding 2 kV HBM.

Feature Summary

• Fully differential data path for low skew clock or signal multiplexing
• Internal clamp structures force unused gate outputs LOW when inputs are open
• Temperature compensated design within the 100 Series
• Separate and common select inputs for flexible logic applications

Applications

• Multiplexing low skew clock signals
• Skew sensitive signal routing
• Random logic applications requiring separate selects
• Data path switching with common select control

Procurement Notes

Verify the specific suffix FNR2 indicates tape and reel packaging containing 500 units per reel. Confirm RoHS compliance status as the datasheet lists Pb-Free variants but notes potential variations. Ensure the ordering part number matches the exact thermal and mechanical specifications required for the target PCB footprint.

Selection Notes

Select this component for high-frequency ECL systems requiring differential signal integrity. The 100 Series offers temperature compensation compared to the standard 10 Series. Verify power supply configuration supports either PECL or NECL modes. Check that the 28-PLCC package fits the assembly constraints and airflow requirements for thermal management.

Part Context

This device belongs to the MC10E457/MC100E457 family of 5 V ECL triple differential 2:1 multiplexers. It is manufactured by onsemi and utilizes a 28-lead Plastic Leadless Chip Carrier (PLCC) package. The product line is designed for demanding system clock applications requiring high bandwidth and low skew performance.

Replacement Considerations

MC10E457FNR2G serves as a non-temperature-compensated alternative within the same package. MC100E457FNG is a tube-packaged version of the same functional device. Verify pinout compatibility and electrical characteristics before substitution.

FAQ

How does the device handle unused differential inputs?

Internal clamp structures force the output of an unused gate to a LOW state if both inputs fall 2.5 V below VCC, allowing them to remain open without affecting operation.

What is the function of the VBB pins?

VBB provides an internally generated reference voltage available for AC coupling inputs or as a switching reference for single-ended inputs. It should be decoupled via a 0.01 µF capacitor if used.

Does this device support both PECL and NECL modes?

Yes, it operates in PECL mode with VCC between 4.2 V and 5.7 V (VEE = 0 V) and NECL mode with VCC at 0 V and VEE between −4.2 V and −5.7 V.