onsemi MC10H104MELG

Overview

MC10H104MELG from ON Semiconductor is a quad 2-input MECL 10H™ AND gate with one gate providing both AND and NAND outputs, 1.0 ns typical propagation delay, −5.2 V VEE supply, and SOEIAJ-16 surface-mount package - used in high-speed digital logic systems including ECL-based computing and telecom timing circuits.

For engineers reviewing the MC10H104MELG datasheet, pinout, applications, or equivalent options, key selection factors include its MECL 10K compatibility, −1.95 V to −0.735 V output voltage swing, 0.45–1.9 ns temperature-dependent propagation delay, and Pb-free SOIC-16 packaging for industrial-grade signal integrity.

Technical Context

The MC10H104MELG implements four independent 2-input AND gates using MECL (Emitter-Coupled Logic) differential transistor pairs, operating with negative supply (VEE = −5.2 V ±5%) and referenced to ground-level VCC pins. Its logic threshold is defined by VIH/VIL ranges spanning −1.17 V to −0.735 V across 0°C to +75°C.

One gate features dual complementary outputs (Aout/Bout), enabling direct implementation of AND/NAND functions without external inversion. The device maintains identical pinout and dc characteristics to MECL 10K parts while delivering 100% faster propagation delay without increased supply current.

Key Specifications

Pinout & Package

MC10H104MELG uses the SOEIAJ-16 (JEDEC MS-012AC) 16-pin surface-mount package, 9.9 mm × 5.45 mm body size, 1.27 mm pitch, with gull-wing leads and Pb-free finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC10H104FN and MC100H104M, the MC10H104MELG delivers optimal balance of speed, power, and manufacturability in commercial/industrial SMT assembly - offering Pb-free SOIC-16 compatibility, proven 1.0 ns typical delay, and full MECL 10K interoperability without layout changes.

Availability

MC10H104MELG is available at Aetrix Electronics and suitable for high-speed data multiplexing, telecom line card timing, and industrial PLC backplane logic requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.

Supply support for MC10H104MELG 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 supplier delivering energy-efficient, high-performance silicon solutions for automotive, industrial, cloud computing, and consumer electronics.

The MC10H104MELG belongs to the MECL 10H™ logic family - engineered specifically for ultra-fast, noise-immune digital signal routing in ECL-based systems where timing precision and signal integrity are non-negotiable.

FAQ

What is the recommended termination for MC10H104MELG outputs?

MC10H104MELG outputs must be terminated through a 50 Ω resistor to −2.0 V, as specified in the datasheet's AC parameter test conditions. This termination ensures proper signal integrity, minimizes reflections, and guarantees the stated propagation delay and voltage swing values. Failure to use this exact termination will result in degraded timing performance and potential logic errors in high-speed operation.

Does MC10H104MELG support mixed-voltage interfacing with TTL or CMOS logic?

No, MC10H104MELG is a dedicated MECL 10H device operating at −5.2 V VEE and ground-referenced VCC; it lacks level-shifting circuitry and is not electrically compatible with TTL or CMOS voltage domains. Interfacing requires discrete or integrated ECL-to-TTL translators such as the MC10H116 or equivalent, with careful attention to fanout and termination matching.

Is MC10H104MELG pin-compatible with the older MC10104 series?

Yes, MC10H104MELG is a functional and pinout duplication of the MECL 10K family part (e.g., MC10104), as explicitly stated in the datasheet. All 16 pins map identically, including VCC, VEE, inputs, outputs, and NC positions - enabling direct replacement without PCB modification.

What is the maximum allowable VEE supply variation for MC10H104MELG?

The MC10H104MELG is characterized for VEE = −5.2 V ±5%, i.e., −4.94 V to −5.46 V. Operation outside this range may cause violation of VOH/VOL specifications, reduced noise margin, or failure to meet propagation delay guarantees. Stable, low-noise regulation is essential - especially given its sensitivity to supply-induced threshold shifts.

Why does MC10H104MELG have unused pins (4, 7, 11, 14, 15)?

Pins 4, 7, 11, 14, and 15 are No Connect (NC) terminals - physically present but unbonded internally. They serve mechanical stability and package symmetry purposes in the SOEIAJ-16 outline and must remain unconnected in circuit design. Routing traces or applying solder to these pins risks parasitic coupling or unintended current paths that could degrade high-speed signal fidelity.