onsemi MC10103FN

Overview

MC10103FN from ON Semiconductor is a quad 2-input OR gate in ECL (Emitter-Coupled Logic) technology, designed for high-speed digital logic interfacing in telecom and test equipment. It delivers 2.0 ns typical propagation delay, 2.0 ns typical rise/fall time (20%–80%), and 25 mW typical power dissipation per gate with no load. It operates with V_EE = –5.2 V and dual positive supplies (V_CC1, V_CC2), supporting differential signaling in timing-critical backplane and data-path applications.

For engineers reviewing the MC10103FN datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed ECL-compatible output swing (–0.89 V to –1.85 V), input threshold symmetry (VOHA/VOLA), thermal-stable DC specs across –30°C to +85°C, and PLCC-20 package compatibility with surface-mount high-density layouts.

Technical Context

The MC10103FN implements four independent OR gates using MECL 10,000 series bipolar transistor architecture, with each gate providing complementary OR/NOR outputs. Its differential inputs accept ECL-level signals referenced to V_EE, and outputs drive 50 Ω loads terminated to –2.0 V.

DC performance is specified after thermal equilibrium under transverse airflow ≥500 fpm; all gates meet identical electrical limits-no derating required between channels. Propagation delay (t₄₊₂₊, t_12+9–) and edge timing are measured with 50 Ω loads, ensuring repeatability in impedance-controlled systems.

Key Specifications

Pinout & Package

MC10103FN is housed in a 20-pin Plastic Leaded Chip Carrier (PLCC) package (Case 775–02), surface-mount compatible with JEDEC-standard reflow profiles. Pin assignment follows the PLCC–20 layout defined in the ON Semiconductor MECL Data Book (DL122/D), page 18.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC10103FN, MC100EL01DT offers faster per-gate speed but increases PCB real estate and BOM count for quad implementation, while SN65EPT23D shifts to PECL voltage domain-enabling lower supply complexity but requiring full signal chain redesign to replace MC10103FN in existing ECL systems.

Availability

MC10103FN is available at Aetrix Electronics and suitable for telecom line card timing, high-speed test equipment, and avionics bus arbitration requiring stable component supply and long-term obsolescence management.

Supply support for MC10103FN 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, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The MC10103FN belongs to the legacy MECL 10,000 series, engineered for ultra-high-speed digital logic in telecom infrastructure and precision instrumentation where nanosecond timing determinism is critical.

FAQ

What logic family does the MC10103FN belong to, and what supply voltages does it require?

The MC10103FN is an MECL 10,000 series device operating with V_CC1 and V_CC2 tied to ground and V_EE at –5.2 V. It is not TTL-, CMOS-, or LVDS-compatible. All DC and AC specifications assume this dual-supply configuration, and deviation invalidates guaranteed performance. The MC10103FN must be used with proper ECL termination (50 Ω to –2.0 V) to meet published timing and voltage specs.

Does the MC10103FN provide both true and complement outputs for each OR gate?

Yes, the MC10103FN provides complementary OR/NOR outputs per gate - for example, pin 2 (AOUT) and pin 9 (BOUT) deliver true and inverted logic states derived from inputs on pins 4/5. This eliminates the need for external inverters in differential signaling paths. The MC10103FN's dual-output architecture is explicitly confirmed in its logic diagram and pin assignment table.

What is the maximum operating temperature range validated for the MC10103FN?

The MC10103FN is fully characterized from –30°C to +85°C, with all electrical parameters (including propagation delay, output voltage, and input thresholds) tested and guaranteed across this range. At +85°C, propagation delay remains ≤3.3 ns and output swing stays within –0.70 V to –1.615 V, meeting industrial-grade reliability requirements. The MC10103FN's thermal validation aligns with ON Semiconductor's MECL 10K series qualification standards.

Can the MC10103FN be used in place of the MC10103P (PDIP-16) without circuit changes?

No - the MC10103FN uses a 20-pin PLCC package with different pinout, footprint, and thermal characteristics than the 16-pin PDIP version (MC10103P). Although both share identical logic function and DC/AC specs, the MC10103FN requires a redesigned PCB layout, requalification of solder reflow profile, and verification of decoupling near V_EE due to higher lead inductance in PLCC. The MC10103FN is not a drop-in replacement for MC10103P.

Is the MC10103FN still in active production, and does Aetrix Electronics offer lifecycle support?

While the MC10103FN is a mature product, Aetrix Electronics maintains strategic inventory and authorized distribution channels for continued supply. We provide full lifecycle support including last-time-buy planning, cross-reference guidance, and obsolescence notifications. For long-term programs, Aetrix Electronics can coordinate with onsemi for special manufacturing runs - ensuring continuity for deployed MC10103FN-based systems.