Texas Instruments LM193AH/NOPB

Overview

LM193AH/NOPB from Texas Instruments is a dual precision voltage comparator IC designed for single- or dual-supply operation across 2.0 V to 36 V. It features ±3 mV maximum input offset voltage, 0.4 mA supply current at 5 V, and input common-mode range extending to ground-enabling accurate threshold detection in battery-powered sensor interfaces and industrial monitoring circuits.

For engineers reviewing the LM193AH/NOPB datasheet, LM193AH/NOPB pinout, LM193AH/NOPB application, or LM193AH/NOPB equivalent, key selection criteria include its open-collector output architecture, rail-to-rail input capability with ground-sensing, low-power consumption suitable for always-on systems, and TTL/CMOS logic compatibility without level-shifting.

Technical Context

The LM193AH/NOPB implements two independent PNP-input comparators with open-collector NPN outputs. Its input stage allows common-mode voltages down to ground on single supplies and supports differential inputs up to ±36 V, while maintaining 25 nA typical input bias current and 5 nA max input offset current.

Each comparator operates with 50–200 V/mV small-signal voltage gain and delivers 300 ns large-signal response time under 100 mV step with 5 mV overdrive. Output saturation voltage remains ≤400 mV at 4 mA sink current, enabling direct interface with legacy logic families without external pull-up constraints.

Key Specifications

Pinout & Package

LM193AH/NOPB is packaged in an 8-pin TO-99 metal can (9.08 mm × 9.08 mm body), optimized for thermal stability and EMI resilience in analog-intensive environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM393DR and LM2903PWR, the LM193AH/NOPB offers superior offset voltage (±3 mV vs. ±5/±7 mV), full military temperature range (−55°C to +125°C), and TO-99 metal-can shielding-making it optimal for precision, high-reliability, or EMI-sensitive applications where SOIC alternatives fall short.

Availability

LM193AH/NOPB is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial process controllers, and aerospace power management systems requiring stable component supply across extended temperature and long product lifecycles.

Supply support for LM193AH/NOPB 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 precision analog IC design and high-reliability component manufacturing.

The LM193AH/NOPB belongs to TI's legacy precision comparator family, engineered for applications demanding ground-sensing capability, low power, and robust performance across extreme temperatures-particularly in defense, avionics, and critical infrastructure systems.

FAQ

What is the operating temperature range of the LM193AH/NOPB?

The LM193AH/NOPB is specified for operation from −55°C to +125°C, validated per military-grade testing protocols. This extended range makes it suitable for under-hood automotive, aerospace, and industrial environments where thermal extremes challenge standard comparators. The LM193AH/NOPB maintains its ±3 mV offset voltage and 0.4 mA supply current specifications across this full range.

Does the LM193AH/NOPB require a dual power supply?

No-the LM193AH/NOPB operates equally well from a single supply (2.0 V to 36 V) or split supplies (±1.0 V to ±18 V). Its input common-mode voltage range includes ground on single supplies, eliminating the need for a negative rail in most sensing applications. The LM193AH/NOPB achieves this via a PNP-input stage that draws only 25 nA bias current, preserving accuracy without dual-supply complexity.

Can the LM193AH/NOPB drive TTL and CMOS logic directly?

Yes-the LM193AH/NOPB's open-collector outputs are compatible with TTL, DTL, ECL, MOS, and CMOS logic families. When used with an appropriate pull-up resistor (e.g., 10 kΩ to 5 V), the LM193AH/NOPB delivers ≤400 mV saturation voltage at 4 mA sink current, meeting TTL LOW-level requirements. Its output can also interface with 3.3 V or 1.8 V CMOS inputs by selecting a pull-up to the target logic rail.

What is the maximum differential input voltage the LM193AH/NOPB can withstand?

The LM193AH/NOPB supports a maximum differential input voltage of 36 V, meaning either input can exceed V+ (up to 36 V) as long as the other remains within the common-mode range. This capability enables safe comparison of high-side signals-such as motor phase voltages or rectified AC waveforms-without external clamping diodes. The LM193AH/NOPB sustains this rating across its full −55°C to +125°C operating range.

How does the LM193AH/NOPB handle unused comparator channels?

For unused comparator channels in the LM193AH/NOPB, both inputs should be tied to the negative supply (GND in single-supply mode) and the output left floating or pulled up. This prevents erratic switching and minimizes supply current increase. Unlike some comparators, the LM193AH/NOPB does not require termination to V+; grounding inputs ensures stable quiescent state and avoids unintended oscillation due to floating nodes.