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Texas Instruments LM293MDREP
- Part No.:
- LM293MDREP
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM293MDREP.pdf
- Description:
- IC COMPARATOR 2 DIFF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,876
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Product details
Overview
LM293MDREP from Texas Instruments is a dual differential comparator IC designed for precision voltage comparison in single- or dual-supply systems. It delivers 2 mV typical input offset voltage, 25 nA typical input bias current, and operates across –55°C to 125°C with supply voltage range of 2 V to 36 V. It is widely used in overvoltage protection circuits, window comparators, and industrial sensor interface modules.
For engineers reviewing the LM293MDREP datasheet, LM293MDREP pinout, LM293MDREP application, or LM293MDREP equivalent, key selection considerations include its open-collector output compatibility with TTL/MOS/CMOS, extended temperature rating, low supply current (0.4 mA per comparator), and common-mode input range extending to ground - critical for rail-to-rail sensing in harsh-environment control systems.
Technical Context
The LM293MDREP integrates two independent comparators with Epi-FET input stages enabling low input bias current and wide common-mode input range (0 V to VCC – 1.5 V). Its open-collector outputs support wired-AND logic and direct interfacing to multiple logic families without level-shifting.
Designed for high-reliability applications, it features controlled baseline manufacturing, qualification per JEDEC standards (including HAST, temperature cycling, and intermetallic life testing), and is rated for operation up to 150°C virtual junction temperature - supporting deployment in aerospace, defense, and downhole industrial systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - supports both low-voltage battery-powered and high-voltage industrial rails without external regulation. |
| Input Offset Voltage (TYP) | 2 mV - enables accurate threshold detection within ±2 mV error at room temperature, critical for precision trip-point circuits. |
| Input Bias Current (TYP) | 25 nA - minimizes voltage error across high-impedance sensor sources like thermistors or photodiodes. |
| Common-Mode Input Range | Includes ground (0 V) up to VCC – 1.5 V - allows direct sensing of signals referenced to system ground in single-supply configurations. |
| Output Type | Open-collector - permits flexible pull-up configuration, voltage-level translation, and wired-AND bus implementation. |
| Operating Temperature | –55°C to 125°C - qualified for extended-range environments including avionics, motor drives, and oilfield electronics. |
| Response Time (TYP) | 1.3 μs (100 mV step) - suitable for fast transient detection in power supply supervision and fault monitoring. |
Pinout & Package
LM293MDREP is housed in an 8-pin SOIC (D package), 3.9 mm width, 1.75 mm max height, RoHS-compliant with NiPdAu lead finish and MSL Level-1 rating. Pin 1 is located in Quadrant Q1 per tape-and-reel orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT1 | Open-collector output of Comparator 1 - requires external pull-up; sinks up to 20 mA. |
| 2 | IN1– | Inverting input of Comparator 1 - accepts voltages from –0.3 V to VCC; supports differential sensing. |
| 3 | IN1+ | Non-inverting input of Comparator 1 - common-mode range includes ground; enables zero-reference comparisons. |
| 4 | GND | Analog ground reference - shared return path for both comparators and internal bias circuitry. |
| 5 | IN2+ | Non-inverting input of Comparator 2 - electrically identical to IN1+; supports independent dual-threshold detection. |
| 6 | IN2– | Inverting input of Comparator 2 - matched performance to IN1–; supports symmetrical window comparator topologies. |
| 7 | OUT2 | Open-collector output of Comparator 2 - independently controllable; supports OR/AND logic via external wiring. |
| 8 | VCC | Positive supply rail - powers both comparators; current drain independent of supply voltage (0.4 mA typical per comparator). |
Key Features
| Feature | Design Value |
|---|---|
| Low input offset voltage | 2 mV typical - reduces false triggering in high-gain threshold detection circuits. |
| Extended temperature range | –55°C to 125°C - eliminates derating concerns in uncontrolled ambient deployments. |
| Open-collector outputs | Compatible with TTL, MOS, and CMOS - simplifies interface to legacy and mixed-logic systems without translators. |
| Supply-current independence | 0.4 mA per comparator (typical), constant across 2–36 V - enables stable power budgeting in variable-input designs. |
| Differential input voltage range | ±36 V - allows direct comparison of signals spanning full supply rails without clamping or attenuation. |
Applications
| Overvoltage Protection Circuit | Industrial Sensor Interface |
|---|---|
Use Scenario: Monitors DC bus voltage in motor drives and power supplies to trigger shutdown before damage occurs. IC Role / Device Role / Timing Role: Dual comparator implements hysteresis-based trip and latch function using external resistors and feedback. Use Value: 2 mV offset ensures precise 24 V ±50 mV trip point accuracy; open-collector outputs drive relay drivers directly. | Use Scenario: Interfaces RTD or thermistor bridges in programmable logic controllers (PLCs) requiring cold-junction compensation. IC Role / Device Role / Timing Role: Compares bridge output against reference thresholds to generate discrete alarm states. Use Value: Common-mode range including ground enables direct connection to grounded sensor elements; 25 nA bias current prevents loading errors on high-Z bridges. |
| Window Comparator | Power Supply Supervision |
Use Scenario: Validates that analog sensor output remains within safe operational bounds (e.g., 1–4 V for 4–20 mA loop simulation). IC Role / Device Role / Timing Role: One comparator monitors upper limit, the other lower limit; outputs combined via wired-AND. Use Value: Matched input specs (offset, bias) between channels ensure symmetrical window edges; 1.3 μs response detects rapid excursions. | Use Scenario: Tracks +5 V, +12 V, and +3.3 V rails in embedded computing systems to assert reset during brownout. IC Role / Device Role / Timing Role: Each comparator supervises one rail; outputs feed OR gate to generate unified reset signal. Use Value: Single 8-pin SOIC replaces three discrete supervisors; –55°C to 125°C rating matches host processor thermal envelope. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2903DR | Same core architecture but commercial-grade (0°C to 70°C); 7 mV max VIO vs. 5 mV max for LM293MDREP. | Not qualified for extended temperature or enhanced reliability programs; lacks DMS and pedigree documentation. | Select when cost sensitivity outweighs environmental ruggedness and long-term supply assurance. |
| TLV1702IDR | Rail-to-rail input, 36 V supply, but CMOS output (push-pull); 0.8 mV max VIO, higher quiescent current (120 μA per comparator). | Requires no pull-up resistor; incompatible with wired-AND; unsuitable where open-collector bus arbitration is required. | Choose for low-power, precision, single-supply systems needing active-high outputs and tighter offset. |
Compared with LM293MDREP, LM2903DR offers lower cost but sacrifices extended temperature capability and reliability pedigree, while TLV1702IDR improves precision and power efficiency at the expense of open-collector flexibility and heritage robustness in high-noise industrial settings.
Availability
LM293MDREP is available at Aetrix Electronics and suitable for overvoltage protection circuits, industrial sensor interfaces, and power supply supervision systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM293MDREP 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, embedded processing, and digital technologies, with decades of experience in high-reliability analog IC design.
The LM293-EP product line delivers enhanced reliability and extended temperature operation for aerospace, defense, and industrial applications - engineered to meet stringent DMS, qualification pedigree, and long-term supply requirements.
FAQ
What is the maximum supply voltage rating for LM293MDREP?
The LM293MDREP has an absolute maximum supply voltage (VCC) rating of 36 V. It is tested to 30 V under recommended operating conditions and supports continuous operation from 2 V to 30 V. Exceeding 30 V may impact long-term reliability, though short-term stress up to 36 V is tolerated per absolute maximum ratings. Always refer to the LM293MDREP datasheet for derating guidance at elevated temperatures.
Does LM293MDREP support single-supply operation with inputs referenced to ground?
Yes, LM293MDREP supports true single-supply operation with inputs referenced to ground. Its common-mode input voltage range includes 0 V (ground) up to VCC – 1.5 V for the inverting input and extends beyond VCC for the non-inverting input. This allows direct comparison of ground-referenced sensor signals without level-shifting circuitry - a key feature confirmed in the LM293MDREP electrical characteristics table.
What is the output configuration of LM293MDREP and how does it affect system design?
LM293MDREP features open-collector outputs for both comparators. This requires external pull-up resistors but enables wired-AND logic, voltage-level translation, and direct interfacing with TTL, MOS, and CMOS loads. The output can sink up to 20 mA, allowing direct drive of LEDs, relays, or logic inputs. This configuration is explicitly documented in the LM293MDREP functional description and absolute maximum ratings.
Is LM293MDREP qualified for automotive or aerospace applications?
LM293MDREP is not AEC-Q200 qualified for automotive use, but it is an enhanced-product (EP) device qualified per JEDEC standards for extended temperature (–55°C to 125°C), HAST, temperature cycling, and intermetallic life - making it suitable for aerospace, defense, and industrial applications requiring high reliability. Its qualification pedigree and DMS support are defined in the LM293MDREP ordering information and product folder.
How does the input offset voltage of LM293MDREP compare to standard LM293 variants?
The LM293MDREP has a maximum input offset voltage (VIO) of 5 mV at 25°C, matching the LM293-EP specification and tighter than the commercial LM293's 7 mV max. Its typical VIO is 2 mV - identical to the base LM293 - ensuring consistent precision across temperature and process variations. This value is verified in the LM293MDREP Electrical Characteristics table under "VIO Input offset voltage".
LM293MDREP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- Open-Collector, Open-Drain, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 2V ~ 36V, ±1V ~ 18V
- :
- 5mV @ 30V
- Voltage - Input Offset (Max):
- 0.25µA @ 5V
- Current - Input Bias (Max):
- 20mA
- Current - Output (Typ):
- 2.5mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -55°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
LM293MDREP FAQ
1.How can I place an order for LM293MDREP through Aetrix?
Please submit a Request for Quotation (RFQ) for LM293MDREP 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 LM293MDREP reliable?
The price and inventory of LM293MDREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM293MDREP is usually 5 days.
3.What payment methods are accepted for LM293MDREP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM293MDREP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM293MDREP?
LM293MDREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM293MDREP 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 LM293MDREP?
For technical support, including LM293MDREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM293MDREP requirements.
6.How does Aetrix verify that LM293MDREP is sourced from the original manufacturer or authorized distributors?
All LM293MDREP 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 LM293MDREP meets industry standards.
7.What is the process for return or replacement of LM293MDREP?
All LM293MDREP units undergo pre-shipment inspection (PSI). If there is an issue with LM293MDREP, 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 LM293MDREP part is unused and in its original packaging.
Return procedure for LM293MDREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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