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Texas Instruments LM393ADE4
- Part No.:
- LM393ADE4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM393ADE4.pdf
- Description:
- IC COMPARATOR 2 DIFF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:404
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Product details
Overview
LM393ADE4 from Texas Instruments is a dual voltage comparator IC designed for single-supply operation across 2 V to 30 V, featuring ±4 mV max input offset voltage, 1.3 µs typical response time, 25 µA max input bias current, and rail-to-rail common-mode input range down to ground - used in power supply monitoring, motor control feedback, and industrial sensor interfaces.
For engineers reviewing the LM393ADE4 datasheet, LM393ADE4 pinout, LM393ADE4 application, or LM393ADE4 equivalent, this page delivers verified electrical specs, SOIC-8 package details, real-world use cases in server PSUs and cordless tools, and two validated alternative parts with documented functional differences.
Technical Context
The LM393ADE4 implements open-collector output architecture with independent comparators sharing a common supply rail, enabling flexible pull-up configuration for TTL/MOS/CMOS logic interfacing. Its input stage supports differential voltages up to ±36 V and common-mode inputs extending to VCC – 2 V.
Quiescent current remains stable across supply voltage (0.45–2.5 mA at 5–30 V), and propagation delay is optimized for fast edge detection in overvoltage/undervoltage protection circuits without requiring external hysteresis in many applications.
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) | ±4 mV - enables accurate threshold detection at low signal differentials |
| Response Time (typ) | 1.3 µs - suitable for real-time fault detection in UPS and motor drives |
| Input Bias Current (max) | 25 µA - minimizes loading on high-impedance sensor sources |
| Common-Mode Input Range | 0 V to (VCC – 2 V) - allows direct sensing of ground-referenced signals |
| Output Type | Open-collector - permits wired-OR logic and level translation via external pull-up |
| ESD Rating (HBM) | 2000 V - meets standard handling requirements for board assembly |
Pinout & Package
LM393ADE4 is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package measuring 4.90 mm × 3.91 mm, with standard surface-mount footprint and gull-wing leads compatible with automated reflow processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 output | Open-collector drain - requires external pull-up for logic-high assertion |
| 1IN− | Comparator 1 inverting input | Negative reference input node for differential comparison |
| 1IN+ | Comparator 1 non-inverting input | Signal input node for threshold comparison |
| GND | Ground reference | Common return path for supply and input signals |
| 2IN+ | Comparator 2 non-inverting input | Independent signal input for second comparison channel |
| 2IN− | Comparator 2 inverting input | Independent reference input for second comparison channel |
| 2OUT | Comparator 2 output | Open-collector drain - electrically isolated from 1OUT |
| VCC | Positive supply | Single rail powering both comparators; no negative supply needed |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input capability | Accepts inputs down to GND and up to VCC – 2 V - eliminates need for level-shifting in low-side sensing |
| Open-collector outputs | Enables flexible logic interfacing and wired-OR bus configurations for alarm aggregation |
| Low quiescent current | 0.45–2.5 mA across 5–30 V supply - reduces standby power in always-on systems |
| Differential input voltage tolerance | ±36 V - withstands transient surges beyond supply rails without damage |
| TTL/MOS/CMOS compatibility | Output sink current ≥6 mA - directly drives standard logic families without buffer stages |
Applications
| Power Supply Monitoring | Motor Control Feedback |
|---|---|
Use Scenario: Detecting overvoltage and undervoltage conditions in server PSUs and telecom rectifiers. IC Role / Device Role / Timing Role: Dual comparator compares sensed rail voltages against precision references to assert fault flags. Use Value: ±4 mV offset ensures reliable trip points within tight PSU regulation bands (±1%). | Use Scenario: Monitoring back-EMF zero-crossing in BLDC motor commutation. IC Role / Device Role / Timing Role: One comparator detects rotor position; the other validates supply stability during startup. Use Value: 1.3 µs response enables accurate timing at >10 kHz commutation frequencies. |
| Cordless Power Tool Safety | Building Automation Sensors |
Use Scenario: Battery pack voltage supervision and thermal cutoff coordination in drill/driver systems. IC Role / Device Role / Timing Role: Comparators monitor cell voltage and thermistor divider outputs to disable MOSFET drivers on fault. Use Value: Open-collector outputs allow direct OR-ing of multiple fault signals into a single MCU interrupt line. | Use Scenario: Occupancy detection using PIR sensor signal conditioning and ambient light thresholding. IC Role / Device Role / Timing Role: One comparator thresholds analog PIR envelope; the other compares ambient photodiode output. Use Value: Rail-to-rail input range accepts unbuffered sensor outputs referenced to system ground. |
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 electrical specs; RoHS-compliant lead finish (Pb-free) | No functional difference - drop-in replacement for new designs requiring green compliance | Select LM393DR when RoHS/REACH compliance is mandatory and legacy LM393ADE4 is unavailable |
| LM2903DT | Wider temperature range (–40°C to +125°C); higher max supply (32 V); same pinout | Better suited for under-hood automotive or industrial environments exceeding 85°C ambient | Choose LM2903DT for extended-temp deployments where LM393ADE4's 0°C to 70°C rating is insufficient |
Compared with LM393DR and LM2903DT, the LM393ADE4 offers cost-optimized performance for commercial-grade applications below 70°C, with identical SOIC-8 layout but legacy leaded finish - ideal for legacy repair, cost-sensitive industrial controls, and non-RoHS production runs.
Availability
LM393ADE4 is available at Aetrix Electronics and suitable for server PSU monitoring, cordless power tool safety systems, and building automation sensors requiring stable component supply across multi-year production cycles.
Supply support for LM393ADE4 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 with emphasis on reliability, longevity, and broad design support.
The LM393 series belongs to TI's legacy precision analog comparator family, engineered for robustness in industrial power management, motor control, and sensor interface applications where simplicity, wide supply range, and proven field reliability are critical.
FAQ
What is the maximum supply voltage for LM393ADE4?
The LM393ADE4 supports a maximum supply voltage of 30 V, as specified in its Recommended Operating Conditions table. This rating applies across its full operating temperature range (0°C to 70°C). Exceeding 30 V risks permanent damage, even briefly - unlike the newer LM393B variant which supports up to 36 V. Always verify actual rail margins in your LM393ADE4 design against this absolute limit.
Does LM393ADE4 have internal hysteresis?
No, the LM393ADE4 does not include internal hysteresis. It is a basic dual comparator with no built-in positive feedback. External hysteresis must be added via resistor networks between output and input pins when noise immunity is required - especially in slow-moving or noisy sensor signals. The LM393ADE4 datasheet provides recommended configurations for both inverting and non-inverting hysteresis setups.
Can LM393ADE4 drive an LED directly?
Yes, the LM393ADE4 can drive an LED directly using its open-collector output, provided the LED current stays within the 6 mA minimum sink capability (tested at VOL = 1.5 V). For typical red LEDs (2 V forward voltage) powered from 5 V, a 470 Ω series resistor limits current to ~6.4 mA - safely within spec. Always confirm voltage drop and thermal derating in your LM393ADE4 application, especially at elevated temperatures.
What is the input common-mode voltage range of LM393ADE4?
The LM393ADE4 input common-mode voltage range spans from 0 V to (VCC – 2 V) at room temperature, and from 0 V to (VCC – 2 V) over its full operating range (0°C to 70°C). This allows direct connection of ground-referenced sensors and accommodates inputs near the positive rail - a key advantage over comparators requiring dedicated level-shifting circuitry in your LM393ADE4 design.
Is LM393ADE4 pin-compatible with LM2903?
Yes, LM393ADE4 is pin-compatible with LM2903 in SOIC-8 packaging - both share identical pin functions (1OUT, 1IN−, 1IN+, GND, 2IN+, 2IN−, 2OUT, VCC). However, LM2903 specifies wider temperature range (–40°C to +125°C) and higher max supply (32 V), so substituting LM393ADE4 into an LM2903 design may compromise performance outside 0°C–70°C or above 30 V. Verify all operating conditions before interchanging in your LM393ADE4 implementation.
LM393ADE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- Open-Collector, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 2V ~ 36V, ±1V ~ 18V
- :
- 2mV @ 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:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
LM393ADE4 FAQ
1.How can I place an order for LM393ADE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM393ADE4 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 LM393ADE4 reliable?
The price and inventory of LM393ADE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM393ADE4 is usually 5 days.
3.What payment methods are accepted for LM393ADE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM393ADE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM393ADE4?
LM393ADE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM393ADE4 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 LM393ADE4?
For technical support, including LM393ADE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM393ADE4 requirements.
6.How does Aetrix verify that LM393ADE4 is sourced from the original manufacturer or authorized distributors?
All LM393ADE4 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 LM393ADE4 meets industry standards.
7.What is the process for return or replacement of LM393ADE4?
All LM393ADE4 units undergo pre-shipment inspection (PSI). If there is an issue with LM393ADE4, 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 LM393ADE4 part is unused and in its original packaging.
Return procedure for LM393ADE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM393ADE4 Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
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LM2903DT
STMicroelectronics
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LM393DR
Texas Instruments
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LM239DR
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LM339APWR
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LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
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NCX2200GMAZ
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