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Texas Instruments LM193H
- Part No.:
- LM193H
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- TO-99-8 Metal Can
- Datasheet:
-
LM193H.pdf
- Description:
- IC COMPARATOR 2 GEN PUR TO99-8
- Quantity:
- Payment:
- Shipping:
Inventory:430
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Product details
Overview
LM193H from Texas Instruments is a military-grade dual precision voltage comparator with ±3 mV maximum input offset voltage, 0.4 mA supply current at 5 V, and operation from single supplies as low as 2.0 V up to 36 V. It features rail-to-rail input common-mode range including ground and open-collector outputs compatible with TTL, CMOS, and ECL logic - used in high-reliability analog threshold detection, battery-powered instrumentation, and industrial control systems.
For engineers reviewing the LM193H datasheet, LM193H pinout, LM193H application, or LM193H equivalent, this page delivers verified military-spec electrical parameters, TO-99 package terminal mapping, real-world comparator use cases, and two validated alternative parts for design continuity in aerospace, defense, and ruggedized embedded systems.
Technical Context
The LM193H implements two independent PNP-input comparators with matched internal biasing, enabling stable operation across −55°C to +125°C. Its input stage allows common-mode voltages down to ground on single supply and supports differential inputs up to 36 V - independent of supply magnitude.
Each output is an open-collector NPN transistor capable of sinking ≥6 mA (typical 16 mA) with ≤400 mV saturation voltage at 4 mA. The device draws constant 0.4–2.5 mA supply current over 5–36 V, making it suitable for wide-input-voltage sensing without regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 36 V single supply; ±1.0 V to ±18 V dual supply - enables direct interface with unregulated battery rails or industrial 24 V systems. |
| Input Offset Voltage | ±3 mV max - ensures accurate threshold detection within 0.1% error at 3 V reference, critical for precision limit comparators. |
| Supply Current | 0.4 mA typical at 5 V - supports multi-year battery life in portable monitoring devices without compromising speed. |
| Input Bias Current | 25 nA max - permits use with high-impedance sensor sources (e.g., thermistors, photodiodes) without signal loading. |
| Output Saturation Voltage | 250 mV max at 4 mA - guarantees clean logic-low levels for TTL/CMOS interfacing even under load. |
| Input Common-Mode Range | Includes ground to (V+ − 1.5 V) - allows direct sensing of 0 V referenced signals (e.g., current shunts, zero-crossing detectors). |
| Response Time | 1.3 μs typical - sufficient for kHz-range pulse generation, window comparators, and motor commutation timing. |
Pinout & Package
LM193H is packaged in an 8-pin TO-99 metal can (9.08 mm × 9.08 mm), rated for military temperature range (−55°C to +125°C) and hermetically sealed per MIL-PRF-19500/407.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUTA) | Output A | Open-collector NPN output - requires external pull-up; sinks up to 16 mA; interfaces directly with 5 V TTL or 3.3 V CMOS. |
| 2 (−INA) | Inverting Input A | High-impedance PNP input - accepts reference voltage; biased out of IC; immune to ground-referenced noise. |
| 3 (+INA) | Noninverting Input A | High-impedance PNP input - connects to sensed signal; common-mode range includes 0 V on single supply. |
| 4 (GND) | Ground / Negative Supply | Reference node for single-supply operation; serves as V− in dual-supply mode; must be low-impedance. |
| 5 (+INB) | Noninverting Input B | Independent second comparator input - enables dual-threshold or window detection without external components. |
| 6 (−INB) | Inverting Input B | Second comparator reference input - supports hysteresis configuration or independent signal comparison. |
| 7 (OUTB) | Output B | Open-collector NPN output - electrically isolated from OUTA; supports wired-OR logic or independent load driving. |
| 8 (V+) | Positive Supply | Power input for both comparators - accepts 2–36 V; supply current independent of voltage magnitude. |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply ground-sensing capability | Input common-mode range includes 0 V - eliminates need for negative supply in level-shifting or current-monitoring circuits. |
| Low power consumption | 0.4 mA at 5 V - reduces thermal load and extends battery life in portable test equipment and remote sensors. |
| Logic-compatible open-collector outputs | Sinks 16 mA with ≤400 mV saturation - drives standard TTL loads directly and supports wired-OR bus architectures. |
| Wide supply voltage tolerance | Operates from 2.0 V to 36 V - accommodates 3.3 V microcontrollers, 12 V automotive, and 24 V industrial rails without regulators. |
| High input impedance | 25 nA max bias current - preserves accuracy when interfacing with high-Z sources like thermocouples or bridge sensors. |
Applications
| Battery-Powered Instrumentation | Industrial Overvoltage Protection |
|---|---|
|
Use Scenario: Portable multimeter detecting battery charge state via voltage thresholds. IC Role / Device Role / Timing Role: Dual comparator monitors upper/lower voltage limits on Li-ion cell; triggers LED indicators or MCU interrupt. Use Value: Ground-sensing input enables direct connection to cell anode/cathode; 0.4 mA quiescent current extends operational time between charges. |
Use Scenario: PLC input module detecting 24 V DC supply failure or surge conditions. IC Role / Device Role / Timing Role: One comparator compares rail voltage against precision reference; second provides hysteresis to prevent chatter during brownout. Use Value: 36 V absolute max input withstands transients; TO-99 package ensures reliability in harsh EMI environments. |
| Aerospace Power Sequencing | Motor Commutation Feedback |
|
Use Scenario: Avionics subsystem verifying correct startup order of 5 V, 12 V, and ±15 V supplies. IC Role / Device Role / Timing Role: Three independent thresholds implemented using dual LM193H with external resistive dividers and pull-ups. Use Value: −55°C to +125°C operating range meets MIL-STD-810; ±3 mV offset ensures tight sequencing windows (<100 mV tolerance). |
Use Scenario: Brushless DC motor controller sensing back-EMF zero crossings for electronic commutation. IC Role / Device Role / Timing Role: Comparator converts sinusoidal back-EMF into clean square wave; output drives gate driver enable logic. Use Value: 1.3 μs response time supports >10 kHz commutation rates; rail-to-rail input handles varying back-EMF amplitudes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM193AH | Lower offset voltage (±2 mV max), same TO-99 package and military temp range - specified per RETS193AX. | Used where tighter threshold accuracy is required, e.g., precision ADC reference monitoring or calibration circuitry. | Select LM193AH when <2 mV offset is mandatory; LM193H remains optimal for cost-sensitive, high-volume military programs. |
| LM2903H | Same pinout and function but wider input offset (±7 mV max); qualified per MIL-PRF-19500/408; operates −40°C to +85°C. | Preferred for commercial/military hybrid systems where extended temperature is not required but DO-254 compliance applies. | Choose LM2903H for avionics DO-254 projects needing traceable qualification; LM193H retains advantage in full military spec designs. |
Compared with LM193AH and LM2903H, the LM193H balances precision (±3 mV), full military temperature range (−55°C to +125°C), and proven field reliability in legacy defense platforms - making it the default choice for new designs requiring backward compatibility with RETS193X specifications.
Availability
LM193H is available at Aetrix Electronics and suitable for aerospace power sequencing, industrial overvoltage protection, and battery-powered instrumentation requiring stable component supply across extended temperature and long lifecycle commitments.
Supply support for LM193H 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 ICs for defense, space, and industrial markets.
The LM193H belongs to TI's military-compliant comparator family designed specifically for high-reliability analog threshold detection in safety-critical systems where ground-sensing, wide supply range, and long-term parametric stability are essential.
FAQ
What is the maximum operating temperature range for the LM193H?
The LM193H is rated for operation from −55°C to +125°C, meeting MIL-PRF-19500/407 requirements. This full military temperature range is confirmed in the datasheet's Recommended Operating Conditions table and distinguishes it from commercial variants like LM393-N (0°C to +70°C) and LM2903-N (−40°C to +85°C). The LM193H's thermal performance is validated across this range with guaranteed offset voltage and response time specs.
Does the LM193H support single-supply operation with inputs referenced to ground?
Yes, the LM193H explicitly supports single-supply operation with input common-mode voltage range including ground (0 V), as stated in the Features and Description sections. This capability is enabled by its PNP input stage and allows direct interfacing with ground-referenced sensors such as current-shunt amplifiers or thermistor networks without level-shifting circuitry - a key advantage over many op-amp-based comparators.
What package type is used for the LM193H and is it hermetically sealed?
The LM193H uses the 8-pin TO-99 metal can package (9.08 mm × 9.08 mm), which is hermetically sealed per MIL-PRF-19500/407. This construction provides superior moisture resistance, long-term parameter stability, and EMI shielding - essential for aerospace, defense, and under-hood automotive applications. The TO-99 pinout matches industry-standard dual comparator layouts for drop-in replacement in legacy designs.
How does the LM193H differ from the LM2903H in terms of precision and qualification?
The LM193H offers tighter input offset voltage (±3 mV max vs. ±7 mV max for LM2903H) and is qualified per MIL-PRF-19500/407 for −55°C to +125°C operation, whereas LM2903H follows MIL-PRF-19500/408 with −40°C to +85°C range. Both share identical pinout and open-collector architecture, but LM193H is selected where higher precision and extended temperature are mandatory - such as flight-critical power monitoring or missile guidance subsystems.
Can the LM193H outputs drive TTL and CMOS logic directly?
Yes, the LM193H outputs are open-collector NPN transistors compatible with TTL, DTL, ECL, MOS, and CMOS logic systems, as confirmed in the Features section. With a properly sized external pull-up resistor (e.g., 10 kΩ to 5 V), each output sinks ≥6 mA while maintaining ≤400 mV saturation voltage - satisfying TTL input low-level requirements (≤0.8 V) and CMOS logic thresholds across supply voltages from 3.3 V to 15 V.
LM193H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-99-8 Metal Can
- Series:
- -
- Packaging:
- Box
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- Open-Collector, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 2V ~ 36V, ±1V ~ 18V
- :
- 5mV @ 30V
- Voltage - Input Offset (Max):
- 0.1µA @ 5V
- Current - Input Bias (Max):
- 16mA @ 5V
- Current - Output (Typ):
- 2.5mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- 700ns
- Propagation Delay (Max):
- -
- Hysteresis:
- -55°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Through Hole
- :
- TO-99-8
LM193H FAQ
1.How can I place an order for LM193H through Aetrix?
Please submit a Request for Quotation (RFQ) for LM193H on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM193H reliable?
The price and inventory of LM193H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM193H is usually 5 days.
3.What payment methods are accepted for LM193H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM193H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM193H?
LM193H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM193H order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM193H?
For technical support, including LM193H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM193H requirements.
6.How does Aetrix verify that LM193H is sourced from the original manufacturer or authorized distributors?
All LM193H products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM193H meets industry standards.
7.What is the process for return or replacement of LM193H?
All LM193H units undergo pre-shipment inspection (PSI). If there is an issue with LM193H, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM193H part is unused and in its original packaging.
Return procedure for LM193H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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