onsemi MC10H141FN

Overview

MC10H141FN from onsemi is a four-bit universal shift register in MECL 10H logic family, performing parallel load, shift-left, shift-right, and hold operations on the positive clock edge. It delivers 250 MHz minimum shift frequency, 1.0–2.1 ns propagation delay, and −5.2 V VEE supply operation with 425 mW typical power dissipation. Used in high-speed digital test equipment for serial-to-parallel data conversion.

For engineers reviewing the MC10H141FN datasheet, pinout, applications, or equivalent options, key selection criteria include MECL 10K compatibility, guaranteed 250 MHz shift frequency across 0°C to +75°C, low 1.0 ns minimum propagation delay, and validated operation with −5.2 V ±5% VEE supply.

Technical Context

The MC10H141FN implements four cascaded D-type flip-flops with synchronous 4-to-1 select logic controlling S1/S2 inputs to determine operating mode-parallel entry, shift right (DR), shift left (DL), or hold. All outputs switch on the rising edge of clock (C) input.

It operates exclusively with negative supply (VEE = −5.2 V ±5%), requires termination to −2.0 V via 50 Ω resistors, and meets MECL 10K pinout and dc/dc timing compatibility while improving propagation delay by 100% over legacy equivalents.

Key Specifications

Pinout & Package

MC10H141FN is housed in a 20-lead plastic leaded chip carrier (PLLC) package, case 775−02, FN suffix, with gull-wing surface-mount leads and exposed thermal pad. Pin 1 marked by notch or dot; pin 1 is top-left when notch faces up.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar universal shift register applications.

Compared with MC10H141P and SN74AS858N, the MC10H141FN provides superior high-frequency performance and noise immunity in compact SMT form, but requires negative supply infrastructure and careful termination-making it optimal for new high-speed digital test and instrumentation designs.

Availability

MC10H141FN is available at Aetrix Electronics and suitable for high-speed test equipment, digital instrumentation, and bit-serial communication interfaces requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for MC10H141FN 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier delivering energy-efficient, high-performance silicon solutions for automotive, industrial, cloud computing, and sensing applications.

The MC10H141FN belongs to the MECL 10H high-speed logic product line, engineered specifically for demanding digital test, measurement, and high-frequency data acquisition systems requiring sub-2 ns timing precision.

FAQ

What logic family does the MC10H141FN belong to, and is it compatible with older MECL devices?

The MC10H141FN belongs to the MECL 10H logic family and is explicitly designed as a functional and pinout duplication of the standard MECL 10K part. It maintains full dc and ac compatibility-including identical pin assignments, voltage thresholds, and termination requirements-while delivering 100% faster propagation delay and higher 250 MHz shift frequency. The MC10H141FN operates with the same −5.2 V VEE supply and requires 50 Ω termination to −2.0 V, ensuring drop-in use in existing MECL 10K systems.

What are the supply voltage requirements for reliable operation of the MC10H141FN?

The MC10H141FN requires a single negative supply: VEE = −5.2 V ±5%, with VCC1 (Pin 1) and VCC2 (Pin 16) internally tied to ground and system ground respectively. No positive supply is needed. Operation outside the −5.2 V ±5% range violates maximum ratings and may cause timing violations or output level errors. The MC10H141FN draws approximately 102–112 mA supply current across temperature, resulting in ~425 mW typical power dissipation.

How does the MC10H141FN implement its four operating modes, and what controls them?

The MC10H141FN implements stop shift, parallel entry, shift left, and shift right using dual-mode select inputs S1 and S2. These two pins decode directly into internal 4-to-1 logic to route data without external gating. Mode selection is static: S1/S2 = L/L enables parallel load; H/L enables shift left (DL → Q3); L/H enables shift right (DR → Q0); H/H holds current state. All transitions occur on the rising edge of clock (C), and the MC10H141FN truth table fully defines output behavior per combination.

Can the MC10H141FN be used in cascaded configurations, and how is that achieved?

Yes, the MC10H141FN supports seamless cascading via its serial I/O architecture: Q3 (MSB output) connects to DL of the next stage for shift-left chaining, and Q0 (LSB output) connects to DR of the next stage for shift-right chaining. Its consistent 1.0–2.1 ns propagation delay and tight skew (<0.3 ns typical) ensure predictable timing across multi-chip shift chains. When cascading, maintain matched 50 Ω terminations and minimize trace length between Qx and Dx pins to preserve signal integrity in the MC10H141FN-based system.

What package type and mounting method does the MC10H141FN use, and are there thermal considerations?

The MC10H141FN uses a 20-lead plastic leaded chip carrier (PLLC) package, case 775−02, FN suffix, with gull-wing surface-mount leads and an exposed thermal pad. It requires reflow soldering per J-STD-020 profile for Pb-Free assemblies. Thermal resistance θJA is 42°C/W; for continuous 425 mW operation, board-level copper area and airflow (>500 lfpm) must be designed to keep junction temperature below 125°C. The MC10H141FN datasheet specifies thermal equilibrium testing conditions-designers must replicate those airflow and layout conditions for reliable high-speed operation.