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Texas Instruments LM393APWR
- Part No.:
- LM393APWR
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM393APWR.pdf
- Description:
- IC COMPARATOR 2 DIFF 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:16,332
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Product details
Overview
LM393APWR from Texas Instruments is a dual precision voltage comparator in an 8-pin TSSOP package, operating from 2V to 36V supply, with ±4mV max input offset voltage, 1.3µs typical response time, and rail-to-rail input capability down to ground-used in server PSU overvoltage detection and motor drive current sensing.
For engineers reviewing the LM393APWR datasheet, LM393APWR pinout, LM393APWR application, or LM393APWR equivalent, this page delivers verified electrical specs, validated pin functions, real-world use cases in industrial power systems, and two confirmed alternative comparators for design flexibility and supply continuity.
Technical Context
The LM393APWR implements open-collector output architecture with independent dual comparators, enabling flexible pull-up configuration per channel. Its input stage supports common-mode voltage down to ground and up to VCC − 2V, allowing direct interface with low-side current-sense resistors and battery-monitoring dividers.
It features internal ESD protection (2kV HBM), operates across 0°C to 70°C ambient, and maintains stable quiescent current (≤1mA) independent of supply voltage-critical for always-on monitoring circuits in embedded power management subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2V to 30V - supports wide-input industrial and automotive auxiliary rails without external regulation |
| Input Offset Voltage (max) | ±4 mV - enables accurate threshold detection within ±20mV windows at 5V reference |
| Response Time (typ) | 1.3 µs - sufficient for 500kHz PWM cycle monitoring and fast fault shutdown |
| Input Bias Current (max) | 250 nA - minimizes error in high-impedance sensor interfaces (e.g., thermistor dividers) |
| Output Sink Current (min) | 6 mA - drives standard LED indicators or TTL logic inputs directly |
| Common-Mode Input Range | 0 V to (VCC − 2 V) - allows direct connection to ground-referenced signals and single-supply sensors |
| ESD Rating (HBM) | 2000 V - meets IEC 61000-4-2 Level 2 handling requirements for board assembly |
Pinout & Package
LM393APWR uses an 8-pin TSSOP package (3.00mm × 4.40mm body), optimized for space-constrained PCB layouts while maintaining thermal performance via exposed pad grounding (per TI DSG package guidance).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 Output | Open-collector output requiring external pull-up; sinks current when IN+ > IN− |
| 1IN− | Comparator 1 Inverting Input | Negative input node; accepts signals from 0 V to (VCC − 2 V) |
| 1IN+ | Comparator 1 Non-Inverting Input | Positive input node; same voltage range as 1IN− |
| GND | Ground Reference | System return path for both comparators and internal bias circuitry |
| 2IN+ | Comparator 2 Non-Inverting Input | Independent positive input; shares no internal coupling with Channel 1 |
| 2IN− | Comparator 2 Inverting Input | Independent negative input; supports differential or single-ended sensing |
| 2OUT | Comparator 2 Output | Second open-collector output; electrically isolated from 1OUT |
| VCC | Positive Supply | Single supply rail powering both comparators; no split or negative rail required |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Operates with inputs at GND or up to VCC − 2V-eliminates need for level-shifting in low-voltage sensing |
| Open-collector outputs | Enable wired-OR logic, mixed-voltage interfacing (e.g., 3.3V logic driving 5V bus), and direct LED drive |
| Low quiescent current | ≤1 mA total supply current at 30V-supports always-on battery-backed monitoring without significant drain |
| Wide supply voltage tolerance | 2V–30V operation accommodates unregulated 24V industrial rails and 3.3V/5V logic domains |
| Input ruggedness | Differential input rating of ±36V prevents damage during transient overvoltage events on sensor lines |
Applications
| Server PSU Monitoring | Motor Drive Current Sensing |
|---|---|
Use Scenario: Detecting overvoltage and undervoltage faults on +12V and +5V rails in redundant server power supplies. IC Role / Device Role / Timing Role: Dual comparator independently comparing each rail against precision reference voltages to assert fault flags. Use Value: Enables sub-2µs fault response using 1.3µs propagation delay, meeting ATX specification timing for safe shutdown. | Use Scenario: Monitoring bidirectional current through low-side shunt resistors in BLDC motor phase legs. IC Role / Device Role / Timing Role: Comparing amplified shunt voltage against fixed thresholds to trigger PWM blanking or overcurrent interrupt. Use Value: Input common-mode range down to GND allows direct connection to shunt-no level-shifters needed, reducing BOM count. |
| Appliance Safety Interlock | Building Automation Sensor Interface |
Use Scenario: Validating door latch position and temperature cutoff in commercial ovens before enabling heating elements. IC Role / Device Role / Timing Role: One comparator monitors microswitch closure; the other monitors thermistor voltage against safety trip point. Use Value: Dual-channel integration reduces footprint vs. discrete solutions-critical for compact control board designs. | Use Scenario: Converting analog HVAC sensor outputs (e.g., CO₂, humidity) into digital presence/absence signals for BACnet controllers. IC Role / Device Role / Timing Role: Thresholding conditioned sensor signals to generate clean logic-level occupancy or alarm flags. Use Value: 250nA max input bias current avoids loading high-impedance sensor filters, preserving accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393PWR | Same pinout and electrical specs; differs only in temperature grade (0°C to 70°C vs. LM393APWR's 0°C to 70°C) and minor packaging marking | No functional difference in commercial-temperature applications; identical replacement in non-military/non-extended-temp designs | Select LM393PWR if sourcing legacy stock or cost-sensitive non-A-grade builds where A-suffix is not mandated |
| TLV3702IDR | Lower supply current (80µA vs. 1mA), rail-to-rail output, but narrower supply range (2.7V–16V) and higher offset (±3.5mV typ) | Suitable for battery-powered IoT nodes; unsuitable for 24V industrial rails or high-side sensing above 16V | Choose TLV3702IDR only when ultra-low power and rail-to-rail output are mandatory-and supply stays below 16V |
Compared with LM393PWR, LM393APWR offers identical functionality with guaranteed A-grade screening; versus TLV3702IDR, it trades higher quiescent current for wider voltage range and proven robustness in noisy industrial environments.
Availability
LM393APWR is available at Aetrix Electronics and suitable for server PSU monitoring, motor drive current sensing, and appliance safety interlock applications requiring stable component supply across multi-year production cycles.
Supply support for LM393APWR 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 consumer markets.
The LM393x family was designed for general-purpose voltage comparison in cost-sensitive, high-reliability power management and system monitoring applications-emphasizing ease of use, wide supply tolerance, and field-proven robustness.
FAQ
What is the maximum supply voltage for LM393APWR?
The LM393APWR supports a maximum supply voltage of 30V, as specified in its Recommended Operating Conditions table. This rating applies across its full operating temperature range (0°C to 70°C). Exceeding 30V risks permanent damage, even briefly-designs requiring 36V operation should use the LM393B variant instead. Always verify layout clearance and decoupling for sustained 30V use.
Does LM393APWR support rail-to-rail input operation?
Yes, LM393APWR supports rail-to-rail input common-mode range from 0V (GND) up to VCC − 2V. This allows direct interface with ground-referenced signals like shunt resistor voltages or battery terminals without level-shifting. However, inputs must not go more than 0.3V below GND to avoid incorrect output states or excessive input current-external clamping may be needed in noisy environments.
Can LM393APWR drive a 5V logic input directly?
Yes, LM393APWR can drive a 5V logic input directly when used with a 5V pull-up resistor on its open-collector output. With 4mA sink current, its low-level output voltage remains ≤400mV-well within TTL and 5V CMOS logic '0' thresholds. Ensure the pull-up value (e.g., 10kΩ) limits current to within the 6mA absolute maximum sink rating and accounts for capacitive load to maintain 1.3µs response time.
What is the input offset voltage specification for LM393APWR?
The LM393APWR has a maximum input offset voltage of ±4mV over temperature (0°C to 70°C), per its Electrical Characteristics table. At 25°C, typical offset is ±2mV. This spec ensures reliable detection of signal differences ≥8mV-critical for precision thresholding in power supply margining or sensor zero-crossing detection. For tighter offset needs, consider the LM393B (±4mV max, but ±0.37mV typical).
Is LM393APWR pin-compatible with LM393PWR?
Yes, LM393APWR and LM393PWR share identical 8-pin TSSOP packaging, pinout, and electrical specifications-including supply range, offset voltage, and response time. The 'A' suffix denotes enhanced screening per TI's A-grade reliability standard, but mechanical and functional compatibility is maintained. No PCB changes are required when substituting LM393PWR for LM393APWR in commercial-temperature applications.
LM393APWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-TSSOP
LM393APWR FAQ
1.How can I place an order for LM393APWR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM393APWR 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 LM393APWR reliable?
The price and inventory of LM393APWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM393APWR is usually 5 days.
3.What payment methods are accepted for LM393APWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM393APWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM393APWR?
LM393APWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM393APWR 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 LM393APWR?
For technical support, including LM393APWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM393APWR requirements.
6.How does Aetrix verify that LM393APWR is sourced from the original manufacturer or authorized distributors?
All LM393APWR 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 LM393APWR meets industry standards.
7.What is the process for return or replacement of LM393APWR?
All LM393APWR units undergo pre-shipment inspection (PSI). If there is an issue with LM393APWR, 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 LM393APWR part is unused and in its original packaging.
Return procedure for LM393APWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM393APWR Tags
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