onsemi MC10H188MG

Overview

MC10H188MG from ON Semiconductor is a high-speed MECL 10H™ hex buffer with common enable, delivering 1.3 ns typical propagation delay, −5.2 V VEE operation, and −1.02 V to −0.735 V VOH across 0°C to +75°C. It functions as a level-shifting, noise-immune signal fanout device in ECL logic systems requiring precise timing control and low skew.

For engineers reviewing the MC10H188MG datasheet, pinout, applications, or equivalent options, this part supports high-frequency data routing in telecom clock distribution, test equipment timing modules, and digital instrumentation where MECL 10K compatibility and sub-2 ns delay are critical selection criteria.

Technical Context

The MC10H188MG implements six independent non-inverting buffers sharing a single active-low enable input (pin 1), with outputs driven to low state when enabled and mirroring inputs when disabled. All inputs and outputs operate in the MECL 10H voltage domain, referenced to VEE = −5.2 V, with termination to −2.0 V via 50 Ω.

Its architecture provides voltage-compensated output stages for stable VOH/VOL over temperature (−1.02 V to −0.735 V VOH; −1.95 V to −1.60 V VOL), improved noise margin of 150 mV, and identical pinout to MECL 10K family parts-enabling drop-in replacement without PCB redesign in legacy ECL systems.

Key Specifications

Pinout & Package

MC10H188MG is packaged in a 16-pin SOEIAJ (Small Outline IC) plastic package (Case 966), 300 mil body width, with gull-wing leads and Pb-free finish. Pin 1 is marked by notch or dot; pin numbering follows standard counter-clockwise sequence from top-left corner.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hex buffer applications.

Compared with MC10H188MG, MC100H188M offers faster timing but demands revised power delivery, while SN65EL188DGGR eliminates negative supplies at the cost of ECL interoperability-making MC10H188MG optimal for maintaining legacy MECL 10K infrastructure with verified 1.3 ns performance.

Availability

MC10H188MG is available at Aetrix Electronics and suitable for telecom infrastructure, automated test equipment, radar signal processing, and industrial data acquisition requiring stable component supply and long-term obsolescence management.

Supply support for MC10H188MG 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 specializing in power management, analog, sensor, and logic solutions for automotive, industrial, and communications markets.

The MC10H188MG belongs to the MECL 10H™ logic family, engineered for high-speed, low-jitter signal distribution in legacy ECL systems where backward compatibility and deterministic timing are essential.

FAQ

What is the recommended termination for MC10H188MG outputs?

MC10H188MG outputs must be terminated to −2.0 V through a 50 Ω resistor to meet specified AC parameters including propagation delay and rise/fall times. This termination is required for both loaded and unloaded conditions to maintain MECL 10H signal integrity and noise margin. Failure to use −2.0 V termination will result in out-of-spec VOH/VOL and increased jitter. The MC10H188MG datasheet explicitly defines this condition in Table 2 and AC parameter notes.

Does MC10H188MG support operation at VEE = −4.8 V?

No, MC10H188MG is characterized and guaranteed only at VEE = −5.2 V ±5% (−4.94 V to −5.46 V). Operation at −4.8 V falls outside the maximum ratings and electrical specifications; VOH, VOL, and propagation delay are not validated at that voltage. The MC10H188MG datasheet specifies VEE limits in Table 1 and conditions all electrical characteristics on −5.2 V operation.

Is MC10H188MG pin-compatible with MC10K188P?

Yes, MC10H188MG is a functional and pinout duplication of the MECL 10K™ family part, as confirmed in the official ON Semiconductor datasheet: "This MECL 10H™ part is a functional/pinout duplication of the standard MECL 10K™ family part." Both share identical 16-pin SOEIAJ (MC10H188MG) and PDIP (MC10K188P) pin assignments, including Enable, inputs A–F, outputs AOUT–FOUT, VEE, and dual VCC pins.

What is the maximum output current rating for MC10H188MG?

The MC10H188MG has a continuous output current rating of ±50 mA per output, with surge capability up to ±100 mA. These values are defined in Table 1 (Maximum Ratings) of the datasheet and apply across the full operating temperature range. Exceeding ±50 mA continuously risks thermal instability and parametric shift; the MC10H188MG must be used within these limits to maintain 1.3 ns typical propagation delay and guaranteed noise margin.

Can MC10H188MG be used in a system with +3.3 V logic levels?

No, MC10H188MG is strictly an MECL 10H device requiring −5.2 V VEE and 0 V VCC references; it does not interface directly with +3.3 V CMOS/TTL logic. Level translation circuitry (e.g., MC100EP016 or discrete resistive dividers) is mandatory for interoperation. The MC10H188MG datasheet contains no specifications for +3.3 V compatibility, and its input voltage range (−1.95 V to −0.735 V) is incompatible with 0–3.3 V signaling.