onsemi MC10H103MELG

Overview

MC10H103MELG from ON Semiconductor is a quad 2-input OR gate in MECL 10H logic family, delivering OR/NOR dual outputs per gate with 1.0 ns typical propagation delay, −5.2 V VEE supply operation, and 25 mW/gate power dissipation. It serves as a high-speed combinational logic element in ECL-based timing-critical systems such as telecom line cards and test equipment.

For engineers reviewing the MC10H103MELG datasheet, pinout, applications, or equivalent options, this page provides verified electrical specs, SOEIAJ-16 package details, thermal-rated AC/DC performance across 0–75°C, and direct alternatives for MECL 10K-compatible designs requiring sub-1.5 ns delay.

Technical Context

The MC10H103MELG implements four independent OR gates using emitter-coupled logic with voltage-compensated differential inputs and complementary outputs (Aout/Bout, Cout/Dout). Each gate accepts two true-level inputs (Ain/Bin, Cin/Din) referenced to VEE = −5.2 V and drives into 50 Ω loads terminated at −2.0 V.

It maintains full pinout and functional compatibility with MECL 10K parts while achieving 100% faster propagation delay (tpd ≤ 1.45 ns max at 75°C) without increased supply current-IE remains ≤29 mA across temperature. Noise margin is improved to 150 mV over full operating range.

Key Specifications

Pinout & Package

MC10H103MELG is packaged in SOEIAJ-16 (JEDEC MS-012AC), a 16-pin surface-mount gull-wing package with 0.050″ lead pitch, Pb-free finish, and moisture sensitivity level (MSL) 3 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed ECL OR gate applications.

Compared with MC10H103FN and MC100H103M, the MC10H103MELG offers the best balance of industrial temperature compliance, Pb-free SOEIAJ-16 manufacturability, and lowest thermal resistance-making it preferred for volume telecom and test equipment production where cost, reliability, and assembly yield are prioritized.

Availability

MC10H103MELG is available at Aetrix Electronics and suitable for digital telecom line cards, high-speed test equipment, radar pulse processing units, and legacy mainframe backplanes requiring stable component supply with guaranteed long-term traceability.

Supply support for MC10H103MELG includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

ON Semiconductor is a global semiconductor manufacturer specializing in power management, analog, sensor, and logic solutions for automotive, industrial, and communications markets.

The MC10H103MELG belongs to the MECL 10H logic family, designed specifically for high-speed, low-jitter digital signal routing in ECL-based infrastructure where deterministic timing and noise immunity are essential.

FAQ

What is the recommended termination for MC10H103MELG outputs?

The MC10H103MELG outputs must be terminated with a 50 Ω resistor to −2.0 V, as specified in Table 2 and Figure 1 of the datasheet. This termination ensures correct voltage levels (VOH/VOL), minimizes reflections on transmission lines, and guarantees AC performance including propagation delay and rise/fall times. Using other terminations will invalidate the published timing and noise margin specifications.

Is MC10H103MELG pin-compatible with MC10103?

Yes, MC10H103MELG is a functional and pinout duplication of the MECL 10K MC10103, as explicitly stated in the datasheet's Description section. All 16 pins-including VCC1/VCC2, VEE, inputs, outputs, and NCs-map identically between the two parts, enabling direct replacement without PCB modification.

Does MC10H103MELG support single-supply operation?

No, MC10H103MELG requires a negative supply rail (VEE = −5.2 V ±5%) and grounded or lightly positive VCC (0 V to +0.5 V). It does not operate from a single positive supply. Attempting single-supply use will result in undefined logic states, excessive current draw, and potential device damage.

What is the maximum operating frequency supported by MC10H103MELG?

While not explicitly rated as a "maximum frequency," MC10H103MELG's 1.45 ns max propagation delay and matched 0.5–1.9 ns rise/fall times support reliable operation in logic paths with clock periods ≥2.9 ns-equivalent to >345 MHz fundamental toggle rate. System-level frequency depends on layout, termination, and fanout.

How does the 150 mV noise margin of MC10H103MELG improve system robustness?

The 150 mV noise margin-guaranteed across 0–75°C and supply variation-means MC10H103MELG tolerates up to ±75 mV of coupled noise on input signals without false switching. This directly enhances reliability in electrically noisy environments like backplanes with multiple simultaneous switching outputs or proximity to RF sections.