Texas Instruments LM193 MDR

Overview

LM193 MDR 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 threshold detection in single-supply systems up to 36 VDC.

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

Technical Context

The LM193 MDR implements two independent high-gain comparators with PNP input stages enabling ground-sensing operation from a single +2.0 V to +36 V supply. Its uncommitted NPN open-collector outputs support wired-OR logic and interface directly with TTL, CMOS, ECL, DTL, and MOS families.

Input bias current is 25 nA typ, input offset current ±5 nA typ, and differential input voltage rating equals the full supply voltage. The device meets MIL-STD-883 Group A testing across −55°C to +125°C and is qualified per QML-38534 for space applications.

Key Specifications

Pinout & Package

LM193 MDR is supplied as a bare die (DIESALE) with no leadframe or molded package. It is intended for hybrid microcircuit assembly or custom hermetic packaging per customer requirements. No standardized pinout applies; terminal assignment follows the internal die layout of the LM193 series, with eight functional terminals mapped to bond pads per TI's standard LM193 die design.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM193 MDR, LM193AH/883 provides plug-compatible packaging for test fixtures, while LM193AJ-QMLV offers drop-in replacement on legacy CDIP layouts-neither matches the LM193 MDR's die-level integration capability for ultra-compact, radiation-hardened hybrid assemblies.

Availability

LM193 MDR is available at Aetrix Electronics and suitable for space-grade power sequencing, radiation-tolerant sensor interfaces, and zero-crossing detection requiring stable component supply across extended temperature and radiation environments.

Supply support for LM193 MDR 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 delivering analog and embedded processing solutions for aerospace, industrial, automotive, and communications markets.

The LM193 series was developed for high-reliability analog signal conditioning in radiation-exposed environments, with emphasis on ground-sensing comparators for spacecraft power, telemetry, and attitude control subsystems.

FAQ

What is the radiation tolerance specification for LM193 MDR?

The LM193 MDR is qualified to 100 krad(Si) total ionizing dose (TID) and is ELDRS-free per MIL-STD-883 Method 1019. These specifications are verified for both pre- and post-irradiation electrical performance across −55°C to +125°C, making LM193 MDR suitable for geosynchronous orbit and interplanetary missions where cumulative radiation exposure exceeds 50 krad.

Does LM193 MDR include an internal voltage reference?

No, LM193 MDR does not include an internal voltage reference. It is a dual comparator only, requiring external reference voltages applied to its inverting or non-inverting inputs. Reference sources must be separately radiation-hardened if used in space applications; typical implementations use precision resistive dividers from regulated supplies or dedicated QML-qualified references like REF102QML.

What package type is LM193 MDR supplied in?

LM193 MDR is supplied as a bare die (DIESALE) with no encapsulation or leadframe. It features eight bond pads corresponding to the standard LM193 pinout and is intended for hybrid microcircuit assembly, chip-and-wire bonding, or custom hermetic packaging per customer mechanical and thermal requirements.

Can LM193 MDR operate from a single 3.3 V supply?

Yes, LM193 MDR operates from a single supply as low as 2.0 VDC. At 3.3 V, it maintains full functionality: input common-mode range includes ground, output saturation voltage remains ≤250 mV at 4 mA sink, and supply current is ~0.4 mA. This makes LM193 MDR compatible with modern low-voltage spacecraft buses and FPGAs with 3.3 V I/O domains.

Is LM193 MDR pin-compatible with commercial LM193 variants?

LM193 MDR shares identical electrical functionality and internal die topology with LM193A and LM193QML, but as a bare die, it has no physical pinout. Its eight bond pads map to the same signal functions as the TO-99 and CDIP packages (e.g., V+, GND, OUT1, IN−1, IN+1, OUT2, IN−2, IN+2), enabling direct integration into hybrid designs that replicate those footprints.