onsemi MC10H189P

Overview

MC10H189P from ON Semiconductor is a hex inverter with common enable, implemented in MECL 10H logic family. It provides six independent inverting buffers activated when the ENABLE input is low (−1.17 V to −0.84 V), with typical propagation delay of 1.3 ns, output voltage swing from −1.95 V to −0.84 V, and operates over 0°C to +75°C. It is used in high-speed timing control and signal polarity inversion in telecom line cards.

For engineers reviewing the MC10H189P datasheet, pinout, applications, or equivalent options, key selection considerations include its MECL 10K compatibility, −5.2 V VEE supply requirement, 16-pin PDIP package, and guaranteed noise margin of 150 mV across temperature and voltage variation.

Technical Context

The MC10H189P implements differential emitter-coupled logic with voltage-compensated internal biasing to maintain stable switching thresholds across temperature. Its enable-controlled output stage forces all six outputs low when ENABLE is high, enabling synchronized gating in clock distribution trees.

All inputs and outputs are referenced to VEE (−5.2 V), with VCC1 and VCC2 tied to ground (0 V) per standard MECL 10H operation. Outputs drive 50 Ω loads terminated to −2.0 V, ensuring controlled rise/fall times (0.7–2.4 ns) and minimal skew between channels.

Key Specifications

Pinout & Package

MC10H189P is supplied in a 16-pin plastic dual-in-line package (PDIP), case 648, with 0.300-inch body width and 0.100-inch lead pitch. Pin 1 is VCC1, pin 16 is VCC2, and pin 8 is VEE - all VCC pins connect to ground in standard MECL 10H configuration.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC100H189P and SN74AS863N, the MC10H189P uniquely balances MECL 10K compatibility, −5.2 V operation, and 1.3 ns delay-making it the only viable option for upgrading legacy 10K designs without changing power architecture or PCB layout.

Availability

MC10H189P is available at Aetrix Electronics and suitable for telecom infrastructure, digital test equipment, and high-speed data multiplexing requiring stable component supply and long-term obsolescence management.

Supply support for MC10H189P 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 communications markets.

The MC10H189P belongs to ON Semiconductor's legacy MECL 10H logic portfolio, designed specifically for high-speed, low-skew signal conditioning in telecom and test equipment where backward compatibility with MECL 10K infrastructure is mandatory.

FAQ

What is the recommended termination for MC10H189P outputs?

The MC10H189P outputs must be terminated with a 50 Ω resistor to −2.0 V, as specified in the datasheet's AC parameter test conditions. This termination ensures controlled impedance, minimizes reflections on high-speed traces, and guarantees the rated rise/fall times (0.7–2.4 ns) and output voltage swing (−1.95 V to −0.84 V). Failure to use −2.0 V termination will degrade timing performance and noise margin.

Can MC10H189P operate with VEE = −5.0 V instead of −5.2 V?

Yes, MC10H189P supports VEE = −5.2 V ±5%, meaning −4.94 V to −5.46 V is within specification. At −5.0 V, all parameters-including propagation delay (1.3 ns typ), noise margin (150 mV min), and output voltage levels-remain guaranteed per Table 2 and Table 3. However, VCC1 and VCC2 must remain at 0 V, and termination must stay at −2.0 V.

Is MC10H189P pin-compatible with MC10K189?

Yes, MC10H189P is a functional and pinout duplication of the MECL 10K family part MC10K189, as explicitly stated in the datasheet. All 16 pins match in function and location, including VCC1 (pin 1), ENABLE (pin 15), VCC2 (pin 16), and VEE (pin 8). No PCB changes are required when upgrading from MC10K189 to MC10H189P.

What is the maximum output current rating for MC10H189P?

The MC10H189P has a continuous output current rating of ±50 mA per output, with a surge rating of ±100 mA. These values are defined in Table 1 (Maximum Ratings) and apply across the full operating temperature range (0°C to +75°C). Exceeding ±50 mA continuously risks thermal overstress and parametric shift, especially when multiple outputs switch simultaneously.

Does MC10H189P support Pb-free assembly?

Yes, MC10H189P is available in both standard and Pb-free versions. The Pb-free variant is designated MC10H189PG and uses the same PDIP-16 package (case 648). Both versions share identical electrical specifications, thermal characteristics, and mechanical dimensions, and both comply with JEDEC J-STD-020 moisture sensitivity level (MSL) requirements for reflow soldering.