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Texas Instruments LM393APG4
- Part No.:
- LM393APG4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LM393APG4.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,438
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Product details
Overview
LM393APG4 from Texas Instruments is a dual voltage comparator IC designed for single-supply operation across 2 V to 36 V, featuring ±4 mV max input offset voltage, 1.3 µs typical response time, and rail-to-rail input capability down to ground - widely deployed in server PSU overvoltage protection circuits.
For engineers reviewing the LM393APG4 datasheet, LM393APG4 pinout, LM393APG4 application, or LM393APG4 equivalent, this page delivers verified electrical specs, package-confirmed pin functions, real-world use cases in industrial power systems, and two validated alternative parts with documented functional and thermal differences.
Technical Context
The LM393APG4 implements open-collector output architecture with independent dual comparators, enabling flexible pull-up configuration per channel. Its input stage supports common-mode voltages from ground to (VCC − 2 V), allowing direct sensing of low-side current shunts or battery terminals without level-shifting.
Propagation delay is optimized for TTL-compatible transitions, with 0.3 µs typical high-to-low response under 5 V supply and 15 pF load. Quiescent current remains stable at 0.8–1 mA across full operating voltage range, making it suitable for always-on monitoring in embedded power management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - supports wide-input industrial and telecom power rails without external regulation |
| Input Offset Voltage (max) | ±4 mV over temperature - enables accurate threshold detection in 12 V or 24 V control loops |
| Response Time (typ) | 1.3 µs - sufficient for cycle-by-cycle overcurrent flagging in switched-mode PSUs |
| Input Bias Current (max) | 250 nA - permits high-impedance sensor interfacing (e.g., thermistor dividers) without loading error |
| Output Sink Current | 6 mA - drives standard LED indicators or logic-level MOSFET gates directly |
| Common-Mode Range | 0 V to (VCC − 2 V) - allows ground-referenced inputs while maintaining full supply headroom |
| ESD Rating (HBM) | 2000 V - meets IEC 61000-4-2 Level 2 for board-level robustness in factory automation |
Pinout & Package
LM393APG4 is packaged in an 8-pin PDIP (Plastic Dual In-line Package) with body size 9.81 mm × 6.35 mm, suitable for through-hole prototyping and legacy industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 output | Open-collector drain - requires external pull-up to define logic-high level and sink current up to 6 mA |
| 1IN− | Inverting input, Comp 1 | Differential reference node - connects to fixed threshold or feedback signal |
| 1IN+ | Non-inverting input, Comp 1 | Sense input - accepts analog signals from sensors, dividers, or regulated rails |
| GND | Ground reference | Common return path for both comparators and external pull-ups |
| 2IN+ | Non-inverting input, Comp 2 | Independent sense node - enables dual-threshold monitoring (e.g., UVLO + OVLO) |
| 2IN− | Inverting input, Comp 2 | Second reference node - configurable for hysteresis or window comparison |
| 2OUT | Comparator 2 output | Separate open-collector output - allows independent load switching or wired-OR logic |
| VCC | Positive supply | Single power rail - powers both comparators; no split or negative supply required |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range down to GND | Enables direct interface with ground-referenced voltage dividers in battery management or motor control |
| Open-collector outputs with 6 mA sink capability | Supports mixed-voltage logic interfacing (e.g., 3.3 V MCU with 5 V indicator LED) |
| Stable quiescent current (0.8–1 mA) vs. supply voltage | Eliminates supply-dependent bias drift in precision threshold detection circuits |
| 2 kV HBM ESD rating | Reduces need for external TVS protection in assembly-line handling and field-deployed equipment |
| Wide temperature range (0°C to +70°C) | Validated for commercial-grade applications including consumer appliances and office infrastructure |
Applications
| Overvoltage Protection in Server PSUs | Undervoltage Lockout in Cordless Power Tools |
|---|---|
Use Scenario: Monitors +12 V rail in redundant server power supplies to trigger shutdown if voltage exceeds 12.6 V. IC Role / Device Role / Timing Role: Dual comparator configured as window detector - one channel for OV, one for UV - with hysteresis via feedback resistors. Use Value: Prevents downstream FPGA or ASIC damage by asserting fault flag within 1.3 µs of overvoltage event. | Use Scenario: Detects battery pack voltage drop below 10.8 V during high-current motor startup in cordless drills. IC Role / Device Role / Timing Role: Comparator 1 compares battery voltage against precision reference; output drives enable pin of motor driver IC. Use Value: Ensures immediate torque cutoff before Li-ion cell over-discharge, extending battery cycle life. |
| Motor Phase Monitoring in Factory Automation | Thermal Trip Detection in Building HVAC Controllers |
Use Scenario: Senses zero-crossing of back-EMF in BLDC motor phases to synchronize commutation timing. IC Role / Device Role / Timing Role: Comparator 2 used as fast edge detector on filtered phase voltage; output feeds microcontroller capture timer. Use Value: Achieves <5 µs timing jitter between sensed zero-cross and interrupt assertion, improving motor efficiency by >3%. | Use Scenario: Reads NTC thermistor voltage divider in air-handling unit to disable compressor if coil temperature exceeds 65°C. IC Role / Device Role / Timing Role: Single comparator compares thermistor output to fixed reference; output latches via SR flip-flop. Use Value: Provides fail-safe thermal cutoff independent of main controller firmware, meeting UL 60730 Class B 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 | SOIC-8 package (4.90 mm × 3.91 mm); identical electrical specs and pinout | Better thermal performance (RθJA = 148.5°C/W vs. 114.9°C/W for PDIP); suited for reflow-soldered boards | Select LM393DR when migrating to surface-mount assembly or requiring tighter layout footprint. |
| LM2903P | Same PDIP-8 package; wider temp range (−40°C to +125°C); higher max offset (±7 mV) | Validated for automotive under-hood environments; supports extended industrial ambient conditions | Choose LM2903P where ambient temperature exceeds 70°C or AEC-Q200 compliance is required. |
Compared with LM393APG4, LM393DR offers superior thermal dissipation in space-constrained layouts, while LM2903P provides broader temperature resilience at the cost of slightly reduced DC accuracy - both retain identical functional behavior and pin compatibility.
Availability
LM393APG4 is available at Aetrix Electronics and suitable for server PSU protection, cordless tool safety systems, and factory automation motor control requiring stable component supply across long production lifecycles.
Supply support for LM393APG4 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.
The LM393x family was engineered for cost-sensitive, high-reliability voltage comparison tasks in power management and system supervision - emphasizing robustness, wide supply tolerance, and ease of integration into legacy designs.
FAQ
What is the maximum supply voltage rating for LM393APG4?
The LM393APG4 has an absolute maximum supply voltage of 36 V. It operates reliably across a recommended range of 2 V to 30 V, making it compatible with standard 3.3 V, 5 V, 12 V, and 24 V industrial power rails. Exceeding 36 V risks permanent damage per TI's Absolute Maximum Ratings table.
Does LM393APG4 support rail-to-rail input operation?
Yes, the LM393APG4 supports common-mode input voltages from ground (0 V) up to (VCC − 2 V). This rail-to-ground input range allows direct connection to low-side current-sense resistors or battery terminals without level-shifting circuitry - a key advantage in power-supply monitoring applications using LM393APG4.
Can LM393APG4 drive a 5 V logic input directly?
No - LM393APG4 features open-collector outputs and cannot source current. To interface with a 5 V logic input, an external pull-up resistor (e.g., 10 kΩ to 5 V) must be connected to each output. The LM393APG4 output will then sink current to assert LOW; HIGH state is defined solely by the pull-up.
What is the typical propagation delay of LM393APG4 at 5 V supply?
At VCC = 5 V, with a 15 pF load and 5.1 kΩ pull-up, the LM393APG4 exhibits a typical propagation delay of 1.3 µs for small-signal transitions (100 mV step with 5 mV overdrive). For TTL-level inputs, delay drops to 0.3 µs - critical for fast fault response in LM393APG4-based overvoltage detectors.
Is LM393APG4 pin-compatible with LM2903P?
Yes - LM393APG4 and LM2903P share identical PDIP-8 pinout, pin functions, and open-collector output architecture. However, LM2903P specifies a wider operating temperature range (−40°C to +125°C) and higher input offset voltage (±7 mV max), so direct substitution requires validation of thermal and accuracy requirements in the target LM393APG4 application.
LM393APG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Tube
- 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:
- Through Hole
- :
- 8-PDIP
LM393APG4 FAQ
1.How can I place an order for LM393APG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM393APG4 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 LM393APG4 reliable?
The price and inventory of LM393APG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM393APG4 is usually 5 days.
3.What payment methods are accepted for LM393APG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM393APG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM393APG4?
LM393APG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM393APG4 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 LM393APG4?
For technical support, including LM393APG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM393APG4 requirements.
6.How does Aetrix verify that LM393APG4 is sourced from the original manufacturer or authorized distributors?
All LM393APG4 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 LM393APG4 meets industry standards.
7.What is the process for return or replacement of LM393APG4?
All LM393APG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM393APG4, 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 LM393APG4 part is unused and in its original packaging.
Return procedure for LM393APG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM393APG4 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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