Texas Instruments LM193 MDE

Overview

LM193 MDE from Texas Instruments is a radiation-hardened, low-power, dual voltage comparator with 2.0 mV max input offset voltage, 0.4 mA supply current, and rail-to-rail input common-mode range including ground - designed for space-grade analog signal conditioning in single-supply systems up to 36 VDC.

For engineers reviewing the LM193 MDE datasheet, LM193 MDE pinout, LM193 MDE application, or LM193 MDE equivalent, this page delivers verified electrical specs, TO-99/CDIP package mapping, radiation tolerance (100 krad(Si), ELDRS-free), and real-world comparator use cases in zero-crossing detection, time-delay generation, and MOS clock driving.

Technical Context

The LM193 MDE implements two independent high-gain comparators with PNP input stages enabling ground-sensing operation on single supplies. Its uncommitted NPN open-collector outputs support wired-OR logic and TTL/CMOS/MOS interfacing via external pull-up resistors.

Designed for radiation-tolerant environments, it meets MIL-STD-883 Class B testing across −55°C to +125°C and supports total ionizing dose (TID) up to 100 krad(Si) without performance degradation - validated under Group A subgroups 1–14 and post-irradiation AC/DC parameter limits.

Key Specifications

Pinout & Package

LM193 MDE is supplied as a bare die (DIESALE) with no leadframe or molded package. It requires custom mounting and wire bonding per MIL-PRF-38535 QML-V requirements. Pin assignment follows the standard LM193 dual comparator topology.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM193 MDE, LM193AH/883 and LM193AJ/883 offer identical comparator functionality and DC/AC performance but lack radiation qualification - making LM193 MDE the only option for TID-critical space systems where bare-die integration and ELDRS-free operation are mandatory.

Availability

LM193 MDE is available at Aetrix Electronics and suitable for space avionics, satellite power management, and radiation-hardened instrumentation requiring stable component supply, traceable lot history, and extended temperature operation.

Supply support for LM193 MDE 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 and embedded processing technologies, with decades of heritage in high-reliability aerospace components.

The LM193 series was developed to deliver precision, low-power dual comparison in harsh environments - specifically targeting space-grade signal conditioning where radiation tolerance, ground-sensing capability, and single-supply operation are essential.

FAQ

What is the radiation tolerance specification for LM193 MDE?

The LM193 MDE is qualified to 100 krad(Si) total ionizing dose (TID) and is ELDRS-free per MIL-STD-883 Method 1019. It undergoes full Group A testing across −55°C to +125°C and maintains specified DC/AC parameters pre- and post-irradiation - making it suitable for long-duration space missions where cumulative radiation exposure is a primary design constraint. LM193 MDE retains its ±2.0 mV offset voltage and 0.8 µs response time after irradiation.

Does LM193 MDE include an integrated package or require custom assembly?

LM193 MDE is supplied as a bare die (DIESALE) with no encapsulation, leadframe, or standard package. It requires wire bonding and hermetic mounting onto a custom substrate per QML-V requirements. Unlike TO-99 or CDIP variants, LM193 MDE has no pins or solderable terminals - its terminal pads correspond directly to the LM193 dual comparator layout and must be integrated into a radiation-hardened hybrid module or ASIC carrier.

Can LM193 MDE operate from a single 3.3 V supply?

Yes, LM193 MDE operates from 2.0 VDC to 36 VDC on a single supply, including 3.3 V. Its input common-mode range extends to ground, and output saturation voltage remains ≤250 mV at 4 mA sink - ensuring clean logic-low levels for 3.3 V CMOS interfaces. Supply current stays at 0.4 mA typical, preserving efficiency in low-voltage systems without compromising speed or accuracy.

How does the open-collector output of LM193 MDE interface with TTL logic?

The LM193 MDE features uncommitted NPN open-collector outputs that sink current to ground. To interface with TTL, connect a pull-up resistor (typically 1–5 kΩ) from Output A or B to +5 V. At 4 mA sink, the output saturates to ≤250 mV - well below TTL's 0.8 V logic-low threshold. This configuration supports wired-OR logic, level translation, and direct drive of multiple TTL inputs without additional buffering.

What is the maximum differential input voltage rating for LM193 MDE?

The LM193 MDE supports a differential input voltage of ±36 V, meaning either input may exceed the positive supply rail by up to 36 V as long as the other remains within the common-mode range (−0.3 V to V+). This enables robust overvoltage protection in sensor front-ends and fault-tolerant monitoring - confirmed in Absolute Maximum Ratings and validated in application notes for crystal oscillators and pulse generators.