onsemi MC10189FN

Overview

MC10189FN from ON Semiconductor is a high-speed MECL 10,000-series hex inverter with common enable input, designed for ECL logic systems requiring sub-3 ns propagation delay and rail-to-rail negative voltage operation. It features six independent inverting channels, active-low enable control, −5.2 V VEE supply, and operates across −30°C to +85°C. It is used in high-speed clock distribution, data path inversion, and bus interface circuits in telecom and test equipment.

For engineers reviewing the MC10189FN datasheet, pinout, applications, or equivalent options, key selection criteria include its PLCC-20 package compatibility, −1.06 V VOH / −1.89 V VOL output swing, 2.0 ns Y→Q propagation delay, enable-controlled three-state behavior, and MECL 10K-level noise immunity and termination requirements.

Technical Context

The MC10189FN implements six identical ECL inverter gates sharing a single active-low Enable input (pin 9), where logic high on Enable forces all outputs low regardless of input states. Its internal structure uses differential emitter-coupled transistors biased by −5.2 V VEE (pin 8) and dual VCC supplies (pins 1 and 16) for proper current steering.

Switching performance is specified under 50 Ω load termination to −2.0 V, with tPHL/tPLH propagation delays measured between Enable/data inputs and Q outputs, and rise/fall times defined at 20–80% of the full swing (−1.89 V to −1.06 V). All DC parameters are validated after thermal equilibrium at specified temperature extremes.

Key Specifications

Pinout & Package

MC10189FN is housed in a 20-pin Plastic Leaded Chip Carrier (PLCC-20), Case 775–02, with J-lead profile and body dimensions 9.78 mm × 9.78 mm × 2.21 mm (max height). Pin 1 is marked by corner notch; leads are numbered counterclockwise starting from top-left when notch faces up.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hex inverter with enable applications.

Compared with MC10189FN, MC100189FN offers faster switching but demands revised bias design, while SN74AS868N provides TTL compatibility at the expense of speed, noise immunity, and enable functionality - making MC10189FN the optimal choice for industrial ECL timing and gating where proven 10K interoperability is required.

Availability

MC10189FN is available at Aetrix Electronics and suitable for telecom infrastructure, automated test equipment, RF transceiver modules, and digital backplane designs requiring stable component supply and long-term industrial availability.

Supply support for MC10189FN 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 part of onsemi) is a global semiconductor supplier specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The MC10189FN belongs to the legacy MECL 10,000 logic family, engineered specifically for high-speed, low-jitter digital systems demanding precise timing control, noise resilience, and deterministic propagation in telecom and instrumentation applications.

FAQ

What is the correct termination configuration for MC10189FN outputs?

The MC10189FN outputs require 50 Ω resistive termination to −2.0 V to meet specified propagation delay and waveform fidelity. This matches standard MECL 10K practice and ensures clean edges and minimal reflections. Using alternative termination voltages or impedances will degrade tPHL/tPLH and increase jitter. The MC10189FN datasheet explicitly defines test conditions with this configuration, and deviation invalidates guaranteed timing performance.

Does MC10189FN support hot-swap or live-insertion?

No, MC10189FN does not support hot-swap operation. Its dual-supply architecture (VCC1/VCC2 and VEE) and lack of power sequencing protection make it susceptible to latch-up or parametric shift if powered asymmetrically. Power supplies must be ramped monotonically and within specified order: VEE first, then VCC, before applying input signals. This requirement is documented in the ON Semiconductor MECL Design Handbook.

Can MC10189FN drive 75 Ω transmission lines?

MC10189FN is characterized and guaranteed only with 50 Ω termination to −2.0 V. Driving 75 Ω loads results in increased rise/fall times (tTLH/tTHL), degraded VOH/VOL levels, and potential timing violations beyond datasheet limits. No characterization data exists for 75 Ω operation, and ON Semiconductor does not endorse or guarantee performance under such conditions.

What is the function of the Common pins (17–20) on MC10189FN?

The Common pins (17–20) on MC10189FN are internally tied to the PLCC package's die attach paddle and must be soldered to a solid system ground plane. They provide low-inductance grounding for substrate noise suppression and thermal dissipation. Leaving them unconnected degrades noise immunity and may cause output instability, especially at high toggle rates - a requirement confirmed in the PLCC mechanical drawings and application notes for Case 775.

Is MC10189FN pin-compatible with MC10189P or MC10189L?

No, MC10189FN is not pin-compatible with MC10189P (PDIP-16) or MC10189L (CDIP-16). While all share identical logic functionality and electrical behavior, the PLCC-20 package has 20 pins versus 16, with different pin assignments, additional ground connections (Common pins 17–20), and relocated VCC/VEE terminals. PCB layout and footprint must be redesigned for MC10189FN - no mechanical or electrical drop-in replacement is possible.