MC100ELT21DTR2

Translators, Level Shifters Overview

The MC100ELT21DTR2 is a differential PECL to TTL translator manufactured by onsemi. It operates within a VCC range of 4.75 V to 5.25 V with GND at 0 V. The device provides a typical propagation delay of 3.5 ns and supports a maximum toggle frequency of 100 MHz. It features a 24 mA TTL output capability and includes an internally generated VBB reference voltage pin for single-ended input conditions or AC coupling rebiasing. The component is housed in an 8-lead TSSOP package.

Translators, Level Shifters Feature Summary

• Converts differential PECL signals to standard TTL logic levels using a single gate architecture.
• Includes an internal VBB reference voltage pin that serves as a switching reference for unused differential inputs or for rebiasing AC coupled signals.
• Features flow-through pinouts designed to optimize space, performance, and low power consumption in compact applications.

Translators, Level Shifters Applications

• Interfacing high-speed PECL clock distribution networks with TTL-based digital logic circuits.
• Converting differential PECL data streams for processing by TTL-compatible receivers.
• Utilizing the VBB pin to manage single-ended input conditions where one differential input is left open or tied to the reference voltage.

Translators, Level Shifters Procurement Notes

Verify the specific ordering suffix 'R2' corresponds to the tape and reel packaging format containing 2500 units per reel. Confirm the 'K' marking indicates the MC100 series variant which includes temperature compensation. Ensure the procurement matches the RoHS compliant and lead-free status specified in the datasheet attributes.

Translators, Level Shifters Selection Notes

Select this component when interfacing +5V PECL sources directly with TTL loads without requiring negative supply voltages. The MC100 series is preferred over the MC10 series if temperature compensation is required for stable operation across the -40°C to +85°C range. Consider the TSSOP-8 package dimensions for PCB layout constraints.

Translators, Level Shifters Part Context

This part belongs to the MC10ELT/100ELT21 family of 5V differential PECL to TTL translators. The MC100 series specifically incorporates temperature compensation to enhance performance stability compared to the standard MC10 series. Both variants utilize a small outline 8-lead package suitable for space-constrained designs requiring high-speed signal translation.

Translators, Level Shifters Replacement Considerations

MC10ELT21DTR2G

Translators, Level Shifters FAQ

How should the VBB pin be handled for single-ended inputs?

For single-ended input conditions, connect the unused differential input to the VBB pin to serve as a switching reference voltage. If not used, the VBB pin should be left open.

What is the default state of the Q output if inputs are left open?

The Q output will default to LOW if the inputs are left open or are below 1.3 V.