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Texas Instruments LM293DRE4
- Part No.:
- LM293DRE4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM293DRE4.pdf
- Description:
- IC COMPARATOR 2 DIFF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
LM293DRE4 from Texas Instruments is a dual voltage comparator designed for single-supply operation across 2 V to 30 V, featuring ±9 mV max input offset voltage, 1.3 µs typical response time, and rail-to-rail input capability including ground-used in motor drive feedback, power supply monitoring, and appliance control circuits.
For engineers reviewing the LM293DRE4 datasheet, LM293DRE4 pinout, LM293DRE4 application, or LM293DRE4 equivalent, this page delivers verified electrical specs, SOIC-8 package details, real-world use cases, and two confirmed alternative comparators with documented functional and thermal differences.
Technical Context
The LM293DRE4 implements open-collector output architecture per comparator, enabling wired-OR logic and flexible pull-up voltage selection independent of VCC. Its input stage supports common-mode voltages down to ground and up to VCC – 2 V, with differential input range matching supply rails (±30 V).
Quiescent current remains stable at 0.45–1 mA over full supply range and temperature, and output sinking capability reaches 6 mA minimum at 1.5 V saturation-enabling direct interface with TTL, CMOS, and discrete logic without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 30 V - supports wide-input industrial and automotive power rails without regulation |
| Input Offset Voltage (max) | ±9 mV - ensures reliable threshold detection within ±10 mV accuracy over temperature |
| Response Time (typ) | 1.3 µs - enables fast overvoltage/undervoltage fault response in PSU protection circuits |
| Input Bias Current (max) | –400 nA - minimizes loading on high-impedance sensor bridges and voltage dividers |
| Output Sink Current (min) | 6 mA at VOL = 1.5 V - drives standard LED indicators or MOSFET gate resistors directly |
| Common-Mode Input Range | 0 V to VCC – 2 V - allows ground-referenced sensing and rail-sensing in battery-powered systems |
| ESD Rating (HBM) | 2000 V - meets industrial handling requirements without additional input protection |
Pinout & Package
LM293DRE4 is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package measuring 4.90 mm × 3.91 mm, with gull-wing leads and standard JEDEC MS-012AC footprint. Thermal performance is characterized by RθJA = 148.5°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 output | Open-collector node requiring external pull-up; sinks current when IN+ < IN− |
| 1IN− | Comparator 1 inverting input | Accepts reference or feedback signal; common-mode range includes ground |
| 1IN+ | Comparator 1 non-inverting input | Accepts sensed voltage; supports inputs up to VCC − 2 V |
| GND | Ground reference | Return path for both comparators and internal biasing; must be low-impedance |
| 2IN+ | Comparator 2 non-inverting input | Independent input channel; identical electrical behavior to 1IN+ |
| 2IN− | Comparator 2 inverting input | Independent input channel; identical electrical behavior to 1IN− |
| 2OUT | Comparator 2 output | Open-collector node, electrically isolated from 1OUT but sharing same VCC/GND |
| VCC | Positive supply | Single supply input for both comparators; no negative rail required |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Enables direct sensing of signals referenced to ground or near VCC without attenuation networks |
| Open-collector outputs | Allows wired-OR configuration, mixed-voltage interfacing (e.g., 3.3 V logic driving 5 V bus), and simplified level translation |
| Low quiescent current (0.45–1 mA) | Supports always-on monitoring in battery-backed systems with minimal standby drain |
| Wide supply range (2–30 V) | Eliminates need for dedicated LDOs in multi-rail industrial equipment and 24 V control panels |
| Robust ESD rating (2 kV HBM) | Reduces risk of field failure during board assembly and end-equipment handling |
Applications
| Motor Drive Feedback | Server Power Supply Monitoring |
|---|---|
Use Scenario: Detecting overcurrent via shunt voltage in BLDC motor controllers. IC Role / Device Role / Timing Role: Dual comparator compares shunt voltage against two thresholds for fast trip and warning flags. Use Value: 1.3 µs response ensures <10 µs fault detection window, meeting IEC 61800-5-1 safety timing constraints. | Use Scenario: Monitoring +12 V and +5 V rails in redundant ATX server PSUs. IC Role / Device Role / Timing Role: One comparator per rail detects undervoltage; outputs feed OR-gated enable line to main controller. Use Value: Rail-to-rail input allows direct connection to unregulated rails without divider scaling, reducing BOM count. |
| Appliance Control Logic | Factory Automation Sensors |
Use Scenario: Water-level detection in washing machines using capacitive or float-switch analog signals. IC Role / Device Role / Timing Role: Compares sensor output to fixed thresholds to trigger fill/drain cycles. Use Value: ±9 mV offset ensures consistent 5 mm water-level resolution across 0–70°C ambient range. | Use Scenario: Proximity detection in PLC I/O modules using inductive sensor AC amplitude demodulation. IC Role / Device Role / Timing Role: Comparator converts filtered AC envelope into clean digital edge for microcontroller interrupt input. Use Value: 2 kV HBM rating withstands factory ESD events during sensor cable mating/unmating cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | Same SOIC-8 package; identical pinout; ±9 mV offset, 1.3 µs response, 2–30 V supply - functionally identical except for temperature grade (0°C to 70°C vs. –25°C to 85°C) | LM393DR rated for commercial temp only; LM293DRE4 qualified for extended industrial range | Select LM293DRE4 for operation above 70°C ambient or where extended temperature validation is required |
| LM2903DR | SOIC-8 pin-compatible; ±15 mV max offset, 1.3 µs response, 2–32 V supply; wider temp range (–40°C to 125°C) | Higher offset reduces precision in low-delta applications; higher max supply supports 28 V telecom systems | Choose LM2903DR when operating beyond 30 V or requiring automotive-grade temperature margin |
Compared with LM393DR and LM2903DR, LM293DRE4 provides the optimal balance of precision (±9 mV), extended temperature support (–25°C to 85°C), and compatibility with legacy 24 V industrial control designs-making it ideal for cost-sensitive, thermally stable embedded monitoring.
Availability
LM293DRE4 is available at Aetrix Electronics and suitable for motor drive feedback, server power supply monitoring, and appliance control requiring stable component supply across industrial production cycles.
Supply support for LM293DRE4 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, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
LM293DRE4 belongs to TI's legacy dual comparator product line, engineered for robust, low-cost voltage comparison in industrial control, power management, and sensor interface applications where reliability and long-term availability are critical.
FAQ
What is the maximum supply voltage for LM293DRE4?
The absolute maximum supply voltage for LM293DRE4 is 36 V, but the recommended operating range is 2 V to 30 V per the datasheet. Operating continuously at 36 V may reduce long-term reliability and is not validated for lifetime performance. For designs targeting 24 V nominal systems, LM293DRE4 provides 6 V headroom-sufficient for transient spikes without derating.
Does LM293DRE4 support rail-to-rail input operation?
Yes, LM293DRE4 supports a common-mode input voltage range from 0 V (ground) to VCC – 2 V, enabling true rail-to-rail sensing capability. This allows direct interface with ground-referenced sensors and signals near VCC without external level-shifting circuitry-critical for battery voltage monitoring and motor phase detection where input signals span the full supply range.
Can LM293DRE4 outputs drive LEDs directly?
Yes, LM293DRE4 outputs can drive standard 2 mA indicator LEDs directly when configured with a 2.2 kΩ pull-up resistor to 5 V. Each open-collector output sinks ≥6 mA at 1.5 V saturation, providing sufficient margin for visible LED brightness while maintaining logic-low integrity. Ensure current-limiting resistor value accounts for forward voltage drop and desired LED intensity.
Is LM293DRE4 pin-compatible with LM393DR?
Yes, LM293DRE4 is fully pin-compatible with LM393DR in SOIC-8 packaging, sharing identical pin functions, layout footprint, and solder reflow profile. Both devices use the same 1OUT/1IN−/1IN+/GND/2IN+/2IN−/2OUT/VCC ordering. No PCB redesign is needed when upgrading from LM393DR to LM293DRE4 for improved temperature range support.
What is the input bias current specification for LM293DRE4?
The input bias current for LM293DRE4 is specified as –25 nA (typical) and –400 nA (maximum) across the full operating temperature range. This low bias current minimizes error in high-impedance applications such as thermistor-based temperature sensing or photodiode transimpedance amplifier references-ensuring measurement accuracy without added input buffering.
LM293DRE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- -25°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
LM293DRE4 FAQ
1.How can I place an order for LM293DRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM293DRE4 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 LM293DRE4 reliable?
The price and inventory of LM293DRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM293DRE4 is usually 5 days.
3.What payment methods are accepted for LM293DRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM293DRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM293DRE4?
LM293DRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM293DRE4 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 LM293DRE4?
For technical support, including LM293DRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM293DRE4 requirements.
6.How does Aetrix verify that LM293DRE4 is sourced from the original manufacturer or authorized distributors?
All LM293DRE4 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 LM293DRE4 meets industry standards.
7.What is the process for return or replacement of LM293DRE4?
All LM293DRE4 units undergo pre-shipment inspection (PSI). If there is an issue with LM293DRE4, 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 LM293DRE4 part is unused and in its original packaging.
Return procedure for LM293DRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM293DRE4 Tags
-
LM2903DR
Texas Instruments
-
LM339DR
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LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
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LM2901PWR
Texas Instruments
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LM2903DT
STMicroelectronics
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LM393DR
Texas Instruments
-
LM239DR
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LM339APWR
Texas Instruments
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LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
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NCX2200GMAZ
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