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Texas Instruments LM393PE4
- Part No.:
- LM393PE4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LM393PE4.pdf
- Description:
- IC COMPARATOR 2 DIFF 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,667
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Product details
Overview
LM393PE4 from Texas Instruments is a dual voltage comparator IC designed for single-supply operation across 2–30 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 server PSU overvoltage detection, motor drive enable logic, and appliance safety interlocks.
For engineers reviewing the LM393PE4 datasheet, LM393PE4 pinout, LM393PE4 application, or LM393PE4 equivalent, this page delivers verified electrical specs, SOIC-8 package details, real-world use cases in industrial power systems, and validated alternative options for design continuity and sourcing flexibility.
Technical Context
The LM393PE4 implements two independent open-collector comparators with internal ESD protection (2 kV HBM), enabling direct interface to TTL, MOS, and CMOS logic without level-shifting. Its input stage supports differential voltages up to ±36 V and common-mode inputs extending to VCC – 2 V or ground-critical for sensing across wide voltage rails.
Quiescent supply current remains stable at 0.45–1 mA per device over 5–30 V supply and full temperature range, and output sinking capability reaches 6 mA at 1.5 V saturation-making it suitable for driving LEDs, relays, or microcontroller interrupt lines in cost-sensitive embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 30 V - operates from single Li-ion battery up to industrial 24 V rails without external regulation |
| Input Offset Voltage (max) | ±4 mV - enables accurate threshold detection within ±5 mV windows at room temperature |
| Response Time (typ) | 1.3 µs - supports fast fault detection in UPS and motor control feedback loops |
| Input Bias Current (max) | 25 µA - allows high-impedance sensor interfacing (e.g., thermistor dividers) with <1% error |
| Output Sink Current (min) | 6 mA @ VOL = 1.5 V - directly drives standard LEDs or small-signal NPN transistors |
| Common-Mode Input Range | 0 V to (VCC – 2 V) - accepts ground-referenced signals and high-side sensing without attenuation |
| ESD Rating (HBM) | 2000 V - meets IEC 61000-4-2 Level 2 for board-level robustness in factory environments |
Pinout & Package
LM393PE4 is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package measuring 4.90 mm × 3.91 mm, with standard 1.27 mm pitch and gull-wing leads compatible with automated PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Comparator A output | Open-collector output requiring external pull-up; sinks up to 6 mA when active low |
| 2 (IN− A) | Comparator A inverting input | Negative reference input; accepts signals from 0 V to VCC – 2 V |
| 3 (IN+ A) | Comparator A non-inverting input | Signal input; same voltage range as IN−; used for threshold comparison |
| 4 (GND) | Ground reference | System return path for both comparators and internal circuitry |
| 5 (IN+ B) | Comparator B non-inverting input | Independent signal input for second channel; identical electrical behavior to Pin 3 |
| 6 (IN− B) | Comparator B inverting input | Second reference input; supports separate thresholds per channel |
| 7 (OUT B) | Comparator B output | Open-collector output, electrically isolated from OUT A; shares no internal connection |
| 8 (VCC) | Positive supply | Single power rail for both comparators; no separate ground or negative supply required |
Key Features
| Feature | Design Value |
|---|---|
| Wide supply range (2–30 V) | Eliminates need for dedicated LDOs in multi-rail systems-powers directly from main DC bus |
| Input common-mode to ground | Enables direct connection of sensors referenced to system ground without level-shifting resistors |
| Open-collector outputs | Allows wired-OR logic, mixed-voltage interfacing (e.g., 3.3 V MCU + 5 V load), and flexible pull-up selection |
| Low input bias current (25 µA max) | Preserves accuracy in high-resistance divider networks used for battery voltage monitoring |
| Industry-standard pinout | Drop-in replacement for legacy LM393, LM293, and LM2903 in existing SOIC-8 layouts |
Applications
| Server Power Supply Monitoring | Industrial Motor Drive Enable |
|---|---|
Use Scenario: Detecting overvoltage on +12 V and +5 V rails in redundant server PSUs to trigger shutdown before downstream damage. IC Role / Device Role / Timing Role: Dual comparator independently monitors each rail against precision references; outputs feed FPGA interrupt pins. Use Value: 1.3 µs response ensures fault reaction within 2 µs-meeting ATX specification timing margins for OVP protection. | Use Scenario: Validating encoder zero-crossing and thermal cutoff signals before enabling IGBT gate drivers in HVAC compressors. IC Role / Device Role / Timing Role: One comparator checks encoder phase alignment; the other validates NTC thermistor voltage against trip threshold. Use Value: Rail-to-rail input range accepts 0–10 V encoder outputs and 0–3 V thermistor dividers without op-amp buffering. |
| Home Appliance Safety Interlock | Wireless Infrastructure Power Sequencing |
Use Scenario: Confirming door latch closure and water-level sensor activation before starting washing machine drum rotation. IC Role / Device Role / Timing Role: Dual comparator compares mechanical switch and float sensor voltages to fixed resistive references. Use Value: ±4 mV offset ensures reliable detection of 50 mV margin between "latched" and "unlatched" states under temperature variation. | Use Scenario: Controlling power-up sequence of RF PA, baseband, and PMU modules in 5G small cells using discrete voltage thresholds. IC Role / Device Role / Timing Role: Each comparator verifies regulated rail readiness (e.g., 3.3 V, 1.8 V) before asserting enable signals to next stage. Use Value: SOIC-8 footprint and 2 kV HBM rating support reflow-compatible, field-deployable designs meeting GR-63-CORE shock/vibration requirements. |
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; fully interchangeable in new designs and legacy replacements | Select LM393DR for new production requiring Pb-free compliance and TI's enhanced quality screening |
| LM2903P | Wider temp range (–40°C to +125°C); higher max supply (32 V); 15 mV offset (vs. 4 mV) | Better suited for automotive engine bay or outdoor telecom enclosures where ambient exceeds 85°C | Choose LM2903P only if extended temperature or higher voltage margin is required-offset tolerance increases design margin risk |
Compared with LM393PE4, LM393DR offers identical performance with modern environmental compliance, while LM2903P trades precision for ruggedness-making LM393PE4 optimal for commercial/industrial applications demanding tight threshold control at lower cost.
Availability
LM393PE4 is available at Aetrix Electronics and suitable for server power supply monitoring, industrial motor drive enable logic, and home appliance safety interlocks requiring stable component supply across long production lifecycles.
Supply support for LM393PE4 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 and embedded processing solutions for industrial, automotive, and personal electronics markets.
The LM393PE4 belongs to TI's industry-standard voltage comparator product line, engineered for reliability, interoperability, and drop-in compatibility across decades of electronic equipment-from legacy test gear to modern smart appliances.
FAQ
What is the maximum supply voltage rating for LM393PE4?
The LM393PE4 has an absolute maximum supply voltage of 36 V, but its recommended operating range is 2 V to 30 V. Operating above 30 V may degrade long-term reliability and is not guaranteed by TI's characterization data. For designs requiring >30 V rails, consider the LM393B variant rated up to 36 V with improved ESD and offset specs.
Does LM393PE4 support rail-to-rail input operation?
No-LM393PE4 supports a common-mode input range from 0 V to (VCC – 2 V), meaning inputs must stay at least 2 V below the positive supply. It does not accept signals at VCC or above. However, one input can be held at VCC while the other stays within range, enabling high-side sensing configurations without clamping diodes.
Can LM393PE4 drive a 5 V microcontroller GPIO directly?
Yes-LM393PE4's open-collector outputs can interface directly with 5 V-tolerant GPIOs when pulled up to 5 V. The output sinks current when active low and presents high impedance when inactive, matching standard digital input requirements. Ensure the MCU GPIO is configured as input with internal pull-up disabled to avoid contention.
What is the typical propagation delay of LM393PE4 at 5 V supply?
The LM393PE4 exhibits a typical propagation delay of 1.3 µs under standard test conditions (5 V supply, 100 mV input step, 5.1 kΩ pull-up, 15 pF load). Delay varies with overdrive: it drops to ~300 ns with TTL-level transitions and increases to ~1.5 µs at minimal overdrive (<5 mV), as confirmed in TI's SLCS005AH datasheet Figure 5-25.
Is LM393PE4 pin-compatible with LM2903?
Yes-LM393PE4 uses the same SOIC-8 pinout as LM2903 and is functionally compatible in most applications. Key differences include LM393PE4's 0°C to +70°C temperature grade versus LM2903's –40°C to +125°C range, and slightly higher input offset (±4 mV vs. ±7 mV for LM2903). No PCB changes are needed for substitution in commercial-grade designs.
LM393PE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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):
- 0.25µA @ 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:
- Through Hole
- :
- 8-PDIP
LM393PE4 FAQ
1.How can I place an order for LM393PE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM393PE4 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 LM393PE4 reliable?
The price and inventory of LM393PE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM393PE4 is usually 5 days.
3.What payment methods are accepted for LM393PE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM393PE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM393PE4?
LM393PE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM393PE4 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 LM393PE4?
For technical support, including LM393PE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM393PE4 requirements.
6.How does Aetrix verify that LM393PE4 is sourced from the original manufacturer or authorized distributors?
All LM393PE4 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 LM393PE4 meets industry standards.
7.What is the process for return or replacement of LM393PE4?
All LM393PE4 units undergo pre-shipment inspection (PSI). If there is an issue with LM393PE4, 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 LM393PE4 part is unused and in its original packaging.
Return procedure for LM393PE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM393PE4 Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP Semiconductors
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