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Product Detailed Parameters
- Description：ECL TO TTL TRANSLATOR
- Series：*
- Mfr：National Semiconductor
- Package：Bulk
- Translator Type：-
- Channel Type：-
- Number of Circuits：-
- Channels per Circuit：-
- Input Signal：-
- Output Signal：-
- Output Type：-
- Data Rate：-
- Operating Temperature：-
- Features：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Voltage - VCCA：-
- Voltage - VCCB：-
- Grade：-
- Qualification：-
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Overview
The National Semiconductor MC10125FC is a quad MECL to TTL translator designed for interfacing data and control signals between MECL sections and saturated logic sections of digital systems. It incorporates differential inputs and Schottky TTL totem-pole outputs, allowing use as an inverting/non-inverting translator or differential line receiver. The device features a VBB reference voltage on pin 1 for single-ended input biasing. Outputs default to a low logic level when inputs are floating.
Feature Summary
- Provides signal translation between MECL and saturated logic sections
- Features differential inputs for flexible configuration
- Includes Schottky TTL totem-pole outputs
- Offers VBB reference voltage for single-ended biasing
Applications
- Interfacing MECL data signals with TTL logic
- Translating control signals between logic families
- Differential line reception applications
Procurement Notes
Verify the manufacturer designation carefully, as National Semiconductor assets were acquired by Texas Instruments. Confirm the specific suffix FC indicates the ceramic DIP package variant. Ensure compatibility with existing MECL power supply requirements (-5V/-5.2V) during procurement planning.
Selection Notes
Select this component when direct interface between MECL and TTL logic is required without external buffering. Consider the MC10H125 for high-speed ECL variants. Verify that the system can accommodate the -5V power supply typical for MECL operation and that the ceramic package fits the thermal and mechanical constraints of the design.
Part Context
This part belongs to the MC10100 series of emitter-coupled logic devices. It serves as a bridge between high-speed MECL circuits and standard TTL logic. Similar parts include the MC10124 for TTL-to-MECL translation and the MC10H125 for high-speed ECL interfaces.
Replacement Considerations
The ON Semiconductor MC10125FN and MC10125L are documented equivalents. The MC10H125 offers similar functionality with high-speed ECL characteristics. Verify pinout and electrical specifications match before substitution.
