onsemi MC10H103FN

Overview

MC10H103FN from ON Semiconductor is a quad 2-input MECL 10H™ OR gate with OR/NOR complementary outputs, designed for high-speed digital logic in ECL-compatible systems. It delivers 1.0 ns typical propagation delay, −5.2 V VEE supply operation, and 25 mW per gate power dissipation, supporting applications requiring sub-nanosecond timing margins such as telecom line interface circuits and high-frequency test equipment.

For engineers reviewing the MC10H103FN datasheet, pinout, applications, or equivalent options, this page provides verified electrical specifications, PLLC-20 package details, MECL 10K compatibility confirmation, thermal operating range (0°C to +75°C), and validated alternative options for high-speed logic design.

Technical Context

The MC10H103FN implements four independent 2-input OR gates in a single monolithic MECL 10H device, each providing true and complemented outputs. Its voltage-compensated design maintains stable VIH/VIL thresholds across temperature and supply variation, with input current limits of ±425 µA and output drive capability up to ±100 mA surge current.

It operates exclusively with negative supply bias: VEE = −5.2 V ±5%, VCC1 and VCC2 tied to ground (0 V), and requires 50 Ω termination to −2.0 V for AC characterization. The device meets full MECL 10K pinout and functional equivalence while improving propagation delay by 100% without increasing supply current.

Key Specifications

Pinout & Package

MC10H103FN uses the 20-lead Plastic Leaded Chip Carrier (PLLC−20, Case 775) package with gull-wing leads, 0.050″ lead pitch, and body dimensions 0.385″ × 0.385″ (9.78 mm × 9.78 mm). Pin 1 is VCC1, Pin 16 is VCC2, and Pin 8 is VEE - all defined per Figure 2 of the datasheet.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC10H103P and MC10H103FNR2G, the MC10H103FN offers identical logic performance and DC/AC characteristics but differs in packaging format (rail vs. DIP vs. tape), lead finish (Pb vs. Pb-free), and unit quantity-making it optimal for mid-volume evaluation, qualification, and pilot production runs requiring hand-soldered PLLC-20 devices.

Availability

MC10H103FN is available at Aetrix Electronics and suitable for telecom infrastructure, test instrumentation, radar subsystems, and high-speed data acquisition systems requiring stable component supply, long-term obsolescence management, and verified MECL 10H performance.

Supply support for MC10H103FN 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 (now onsemi) is a global semiconductor supplier specializing in energy-efficient power management, analog, logic, and sensing solutions for automotive, industrial, and communications markets.

The MC10H103FN belongs to the MECL 10H™ family, engineered specifically for ultra-high-speed digital logic in ECL-compatible systems where propagation delay, noise immunity, and backward compatibility with MECL 10K infrastructure are critical.

FAQ

What is the recommended termination for MC10H103FN outputs?

The MC10H103FN outputs must be terminated with a 50 Ω resistor to −2.0 V, as specified in Table 2 and Note 1 of the datasheet. This termination ensures correct logic levels (VOH/VOL), minimizes reflections, and guarantees AC performance including rise/fall times and propagation delay. Failure to use this exact configuration may result in invalid timing behavior or degraded noise margin.

Is MC10H103FN pin-compatible with MECL 10K OR gates?

Yes, the MC10H103FN is a functional and pinout duplication of the MECL 10K family OR gate. All 20 pins map identically: VCC1 (Pin 1), VCC2 (Pin 16), VEE (Pin 8), and corresponding input/output pairs match MECL 10K layouts. No PCB modification is needed when upgrading from MC10103 or similar 10K parts to MC10H103FN.

What is the maximum allowable VEE supply voltage range for MC10H103FN?

The MC10H103FN supports VEE from −8.0 V to 0 V, but its electrical characteristics are fully guaranteed only at −5.2 V ±5% (i.e., −5.46 V to −4.94 V). Operation outside this range may cause VIH/VIL shifts, increased power dissipation, or timing violations. The −5.2 V nominal value is required to meet the 1.0 ns typical propagation delay and 150 mV noise margin specs.

Does MC10H103FN support both true and complemented outputs per gate?

Yes, the MC10H103FN provides one OR gate with OR/NOR outputs - meaning each of the four gates delivers both true (e.g., Aout) and complemented (e.g., Bout) logic outputs simultaneously. This dual-output architecture eliminates the need for external inverters in differential signaling paths and simplifies implementation of wired-OR bus structures.

What is the thermal operating limit for MC10H103FN in continuous operation?

The MC10H103FN is rated for continuous operation from 0°C to +75°C ambient temperature. This range is validated under forced airflow >500 lfpm, as stated in Table 1 and the AC Characteristics note. Derating is not specified beyond this range; operation above +75°C risks parametric failure, especially in VOL/VOH and propagation delay stability.