Texas Instruments LM111J-8LQMLV

Overview

LM111J-8LQMLV from Texas Instruments is a radiation-hardened voltage comparator designed for space and high-reliability military applications. It delivers 200 nA max input bias current, ±30 V differential input range, 200 ns response time, and operates from single 5V to dual ±15V supplies. Its output drives TTL/DTL/RTL loads and can switch up to 50V at 50 mA - used in satellite power sequencing, radiation-tolerant sensor interfaces, and missile guidance analog monitoring circuits.

For engineers reviewing the LM111J-8LQMLV datasheet, LM111J-8LQMLV pinout, LM111J-8LQMLV application, or LM111J-8LQMLV equivalent, this page provides verified radiation performance data (50 krad(Si) high-dose-rate and 100 krad(Si) ELDRS-free), absolute maximum ratings, strobe capability, offset nulling support, and package-specific thermal derating - all critical for flight-critical analog signal conditioning design.

Technical Context

The LM111J-8LQMLV implements an open-collector NPN output stage with independent input and output ground isolation, enabling level-shifting across supply domains. Its internal strobe function allows synchronous comparison gating, and balance pins support external offset trimming via potentiometer.

Designed for extreme environments, it meets MIL-STD-883 Class QML-V requirements with guaranteed operation from –55°C to +125°C, 175°C max junction temperature, and ESD rating of 300 V (HBM). Radiation testing per MIL-STD-883 Method 1019 confirms post-irradiation stability of VIO (±0.5 mV delta) and IIB (±12.5 nA delta) under 100 krad(Si) low-dose-rate exposure.

Key Specifications

Pinout & Package

LM111J-8LQMLV uses an 8-lead ceramic dual-in-line package (CDIP), Package Number NAB008A, with hermetic sealing and gold-plated leads. Thermal resistance θ_JA = 134°C/W (still air) enables reliable operation at full 400 mW power dissipation up to +25°C ambient.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage comparator applications.

Compared with LM111QML-SP, LM111J-8LQMLV offers QML-V certification with enhanced lot-level radiation delta testing and extended temperature validation; compared with LM111H, it provides guaranteed 100 krad(Si) ELDRS-free performance and full military screening - essential for mission-critical deployment.

Availability

LM111J-8LQMLV is available at Aetrix Electronics and suitable for satellite power management, missile guidance electronics, and nuclear instrumentation requiring stable component supply under extended lifecycle commitments and radiation assurance.

Supply support for LM111J-8LQMLV 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 U.S.-based semiconductor company specializing in analog and embedded processing technologies for aerospace, defense, and industrial markets.

The LM111 product line was developed for high-reliability analog signal conditioning in radiation-intensive environments, with focus on spacecraft power monitoring, weapon system health diagnostics, and nuclear facility instrumentation.

FAQ

What is the maximum allowable power dissipation for LM111J-8LQMLV at 85°C ambient?

At 85°C ambient, LM111J-8LQMLV's maximum power dissipation is 220 mW. This is calculated using θ_JA = 134°C/W and T_JMAX = 175°C: PD_max = (175 − 85) / 134 ≈ 0.67 W × derating factor. Per Absolute Maximum Ratings table, 400 mW is specified at 25°C, with linear derating above that point. The LM111J-8LQMLV must be thermally managed accordingly in enclosed avionics enclosures.

Does LM111J-8LQMLV support single-supply operation with TTL-compatible output?

Yes, LM111J-8LQMLV operates from a single +5 V supply and its open-collector output is fully compatible with TTL logic when pulled up to +5 V. The output saturates to ≤0.4 V at 8 mA sink current, meeting TTL low-level voltage requirement. The LM111J-8LQMLV does not require negative supply for basic comparator function - making it suitable for mixed 5 V logic and analog systems.

How is the strobe function implemented on LM111J-8LQMLV?

The strobe function is implemented on Pin 5 (Balance/Strobe): driving this pin low disables the output transistor, forcing the collector into high-impedance state regardless of input conditions. When used for offset nulling, Pin 5 connects to V+ and Pin 1 to wiper of a 10 kΩ potentiometer. The LM111J-8LQMLV datasheet specifies I_St = 10 mA max for strobe current, with V_OSt ≥14 V at –3 mA.

What radiation test standards apply to LM111J-8LQMLV?

LM111J-8LQMLV is qualified per MIL-STD-883 Method 1019 (Condition A) for total ionizing dose (TID), with guaranteed performance after 50 krad(Si) high-dose-rate and 100 krad(Si) low-dose-rate exposure. It also meets ELDRS-free requirements per MIL-PRF-38535 Appendix A, confirmed by delta parameter testing (ΔVIO ≤ ±0.5 mV, ΔIIB ≤ ±12.5 nA) post-irradiation. The LM111J-8LQMLV certificate includes full Group A/B testing across –55°C to +125°C.

Can LM111J-8LQMLV inputs be biased beyond the supply rails?

Yes, LM111J-8LQMLV inputs tolerate voltages up to ±30 V differential and common-mode voltages from –30 V to +30 V - independent of V+ and V− supply levels. For example, with V+ = +5 V and V− = GND, IN+ may be at +12 V while IN− is at –10 V, provided the differential remains within ±30 V. This rail-to-rail input capability is intrinsic to the LM111J-8LQMLV's input stage architecture and is verified in Absolute Maximum Ratings.