MC100E457FN

Overview

The MC100E457FN is a triple differential 2:1 multiplexer from the 100 Series, designed for high-frequency applications with bandwidth exceeding 1.0 GHz. It features fully differential data paths ideal for low skew clock signals and supports both separate and common select inputs. The device operates in PECL mode (VCC = 4.2 V to 5.7 V) or NECL mode (VEE = -4.2 V to -5.7 V). Key electrical parameters include a maximum propagation delay of 700 ps, a maximum toggle frequency of 1.1 GHz, and internal input pulldown resistors. It is housed in a PLCC-28 package.

Feature Summary

• Fully differential data path architecture minimizes signal skew for critical timing applications.
• Internal clamp structures force unused gate outputs to a LOW state when inputs are open.
• Multiple VBB pins provide reference voltage for AC coupling and single-ended interface biasing.
• Temperature compensation included within the 100 Series design.

Applications

• Multiplexing low skew clock signals
• Random logic applications requiring separate or common select inputs
• High-speed data path routing

Procurement Notes

Verify component authenticity through authorized channels as this part may be subject to obsolescence notices. Confirm that the specific ordering suffix matches the required package and environmental compliance standards. Ensure all power supply pins are correctly connected to guarantee proper operation. Check for any recent Product Change Notices regarding manufacturing location or material composition updates.

Selection Notes

Select the MC100E457FN over the MC10E457 variant when temperature compensation is required for stable performance across varying thermal conditions. Ensure the system design accommodates the PLCC-28 surface mount footprint. Verify that the application utilizes differential signaling to leverage the device's low skew capabilities. Confirm compatibility with either PECL or NECL power supply configurations based on the system architecture.

Part Context

This component belongs to the MC10E457/100E457 family of 5 V ECL triple differential 2:1 multiplexers. The '100' prefix indicates the inclusion of temperature compensation features not present in the standard '10' series. Manufactured by onsemi, it serves as a specialized logic IC for high-speed digital systems requiring precise signal selection and distribution.

Replacement Considerations

MC10E457FNR2G is a listed alternative within the same product family, differing primarily by the absence of temperature compensation features found in the 100 Series.

FAQ

How does the device handle open inputs?

Internal clamp structures force the Q output of a gate with an open input condition to go to a LOW state, provided both inputs fall 2.5 V below VCC.

What is the function of the VBB pins?

VBB pins provide an internally generated reference voltage used for AC coupling inputs or connecting unused differential inputs as switching reference voltages in single-ended conditions.

Can the device operate with single-ended selects?

Yes, the device provides both separate select inputs (SEL0, SEL1, SEL2) and a common select input (COMSEL) to accommodate different logic application requirements.