Texas Instruments LM119H

Overview

LM119H from Texas Instruments is a high-speed dual comparator IC designed for precision timing and level-detection circuits in military-temperature environments. It operates from a single 5-V or dual ±15-V supply, delivers 80-ns typical response time, supports ±13-V input common-mode range, and drives TTL/DTL/RTL loads up to 25 mA per output - used in relay drivers and window detectors requiring robust performance across −55°C to +125°C.

For engineers reviewing the LM119H datasheet, LM119H pinout, LM119H application, or LM119H equivalent, this page provides verified technical context, package-specific pin functions, real-world use cases, and validated alternative options - all grounded in TI's official SNOSBJ2B production data sheet and orderable packaging documentation for the TO-100 (LME) metal-can variant.

Technical Context

The LM119H implements two independent, uncommitted-collector comparators on a monolithic bipolar process, enabling direct interface with TTL, DTL, RTL, lamps, and relays. Its input stage features low bias current (≤500 nA), high common-mode slew rate, and ground-isolatable inputs/outputs - critical for noise-immune industrial sensing.

Unlike the LM319 series, the LM119H is fully specified over −55°C to +125°C and uses the TO-100 (LME) 10-pin metal-can package with junction-to-ambient thermal resistance of 160°C/W. It requires no external pull-ups for open-collector outputs and maintains stable operation under wide supply ranges (5 V to ±15 V), though absolute maximum supply voltage is limited to 36 V total.

Key Specifications

Pinout & Package

LM119H is housed in a hermetically sealed TO-100 (LME) 10-pin metal-can package (8.96 mm × 8.96 mm body, ≤5.72 mm height), optimized for high-reliability, high-temperature applications with low thermal resistance (160°C/W junction-to-ambient).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual high-speed comparator applications.

Compared with LM119H, LM219J offers identical electrical performance but reduced temperature range and different package thermal behavior, while LM319AM/NOPB trades military-grade ruggedness for modern packaging and tighter DC specs at room temperature - making LM119H irreplaceable for −55°C to +125°C hermetic applications.

Availability

LM119H is available at Aetrix Electronics and suitable for relay driver circuits, window detector systems, industrial sensor interfaces, and military signal conditioning requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for LM119H 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and high-reliability components, with decades of heritage in precision analog ICs and military-grade product lines.

The LM119H belongs to TI's legacy high-speed comparator family, engineered specifically for demanding applications requiring wide temperature operation, open-collector flexibility, and robust performance in safety-critical or mission-critical systems.

FAQ

What is the maximum supply voltage for LM119H?

The LM119H has an absolute maximum total supply voltage of 36 V. When operated from dual supplies, this means ±15 V is the recommended maximum; exceeding ±15 V risks permanent damage. In single-supply mode, V+ must not exceed 16 V above ground (V−), per TI's SNOSBJ2B datasheet Section 5.1. The LM119H must never be operated with more than 16 V between GND and V+, as explicitly warned in the datasheet.

Does LM119H require external pull-up resistors on its outputs?

Yes, LM119H requires external pull-up resistors on both OUTPUT 1 and OUTPUT 2 pins because it features uncommitted collector (open-collector) outputs. These outputs can only sink current - they cannot source it. A pull-up resistor to V+ (or another logic rail) is necessary to establish a defined HIGH state and drive downstream logic or loads such as relays. Typical values range from 1 kΩ to 10 kΩ depending on speed and load current requirements.

What is the operating temperature range of LM119H?

The LM119H is fully specified from −55°C to +125°C, as confirmed in TI's SNOSBJ2B datasheet Section 1 and Package Table. This extended range distinguishes it from the LM219 (−25°C to +85°C) and LM319 variants (0°C to +70°C), making LM119H suitable for aerospace, defense, and under-hood automotive applications where thermal resilience is mandatory.

Can LM119H be used with a single 5-V supply?

Yes, LM119H is explicitly designed to operate from a single 5-V supply (V+ = 5 V, V− = 0 V), as stated in the "Description" section of SNOSBJ2B. In this configuration, inputs remain functional within 1 V to 3 V, saturation voltage stays below 0.4 V at 3.2 mA sink, and supply current is approximately 4.3 mA - enabling direct integration into 5-V logic systems without auxiliary rails.

What package type does LM119H use, and is it hermetically sealed?

LM119H uses the TO-100 (LME) 10-pin metal-can package, which is hermetically sealed per JEDEC MO-006. This construction provides superior moisture resistance, mechanical robustness, and thermal stability - critical for high-reliability applications. The package measures 8.96 mm × 8.96 mm with ≤5.72 mm height and is documented in TI's Package Outline LME0010A and Orderable Addendum.