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Texas Instruments LM393PSR-P
- Part No.:
- LM393PSR-P
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
LM393PSR-P.pdf
- Description:
- PROTOTYPE
- Quantity:
- Payment:
- Shipping:
Inventory:1,116
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Product details
Overview
LM393PSR-P from Texas Instruments is a dual precision voltage comparator in PSOP-8 (Power Small Outline Package) with 2.0mm × 2.0mm body size, supporting 2–36V single-supply operation, ±0.37mV typical input offset voltage, 200µA per comparator quiescent current, and 1µs propagation delay. It serves as a signal-level decision element in power supply monitoring, motor control feedback, and industrial sensor interface circuits.
For engineers reviewing the LM393PSR-P datasheet, LM393PSR-P pinout, LM393PSR-P application, or LM393PSR-P equivalent, key selection criteria include its B-version enhanced ESD rating (2kV HBM), rail-to-rail input common-mode range including ground, TTL/CMOS/MOS output compatibility, and drop-in replacement capability for legacy LM393/LM293 designs without layout changes.
Technical Context
The LM393PSR-P implements two independent open-collector comparators with dedicated ESD clamps, enabling robust operation across −40°C to +85°C ambient temperature. Its input stage supports differential voltages up to ±38V and common-mode inputs down to −0.1V (below ground), while maintaining low input bias current (3.5nA typ) and high large-signal gain (50–200 V/mV).
Propagation delay is characterized at 1µs under 5V supply with 15pF load and 5.1kΩ pull-up, with response time varying by input overdrive (300ns at TTL-level step, 1µs at 5mV overdrive). Output saturation voltage remains ≤400mV at 4mA sink current, ensuring reliable logic-level interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2V to 36V - enables direct use in 3.3V, 5V, 12V, and 24V industrial systems without level-shifting |
| Input Offset Voltage (typ) | ±0.37mV - ensures accurate threshold detection in precision sensing applications like battery voltage monitoring |
| Quiescent Current | 200µA per comparator - supports low-power always-on monitoring in battery-backed or energy-constrained systems |
| Propagation Delay | 1µs (typ, 5mV overdrive) - provides fast response for real-time fault detection in UPS and motor drives |
| ESD Rating (HBM) | 2kV - meets IEC 61000-4-2 Level 2 requirements for board-level handling and field reliability |
| Common-Mode Input Range | Includes ground to (VCC − 2V) - allows direct connection of sensors referenced to system ground without biasing networks |
| Output Type | Open-collector - enables wired-OR logic, flexible pull-up voltage selection (up to 36V), and interface with mixed-voltage systems |
Pinout & Package
LM393PSR-P is housed in an 8-pin PSOP package (identical to WSON-8 with exposed thermal pad), measuring 2.0mm × 2.0mm with 0.5mm pitch. The exposed thermal pad must be soldered directly to PCB ground for thermal and electrical integrity.
| 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 21mA |
| 1IN− | Comparator 1 inverting input | Differential input node; accepts signals down to −0.1V relative to GND without damage or malfunction |
| 1IN+ | Comparator 1 non-inverting input | Differential input node; supports common-mode range up to VCC − 2V |
| GND | Ground reference | System return path for supply and inputs; connects thermally to exposed pad |
| 2IN+ | Comparator 2 non-inverting input | Independent input channel; identical electrical specs to 1IN+ |
| 2IN− | Comparator 2 inverting input | Independent input channel; identical electrical specs to 1IN− |
| 2OUT | Comparator 2 output | Open-collector drain; electrically isolated from 1OUT but shares same VCC/GND rails |
| VCC | Positive supply | Single supply input (2–36V); powers both comparators and defines upper common-mode limit |
Key Features
| Feature | Design Value |
|---|---|
| Drop-in B-version upgrade | Replaces LM393, LM293, and LM2903 without PCB or firmware changes-verified by TI's family compatibility statement |
| Rail-to-rail input capability | Accepts input voltages from −0.1V to VCC − 2V, eliminating need for input bias resistors in ground-referenced sensor circuits |
| Low input bias current | 3.5nA typical - minimizes loading error on high-impedance sources such as thermistors or photodiodes |
| Faster propagation delay | 1µs vs. 1.3µs in legacy versions - improves timing margin in high-speed overvoltage/undervoltage protection |
| Enhanced ruggedness | Dedicated ESD clamps and ±38V differential input rating - withstands transient coupling in noisy industrial environments |
Applications
| Overvoltage Protection Circuit | Motor Phase Current Monitoring |
|---|---|
Use Scenario: Detecting DC bus voltage exceeding 28V in a 24V server PSU to trigger shutdown before capacitor failure. IC Role / Device Role / Timing Role: Dual comparator configured as window detector with hysteresis; one channel monitors upper threshold, second validates lower bound. Use Value: ±0.37mV offset ensures <±10mV total threshold error at 28V, improving trip accuracy over legacy LM393 (±4mV max). | Use Scenario: Sampling shunt voltage across motor phase leg to detect stall or short-circuit conditions in cordless power tools. IC Role / Device Role / Timing Role: High-speed comparator comparing shunt voltage against programmable reference; triggers gate driver disable within 1µs. Use Value: 1µs propagation delay enables sub-microsecond fault response, critical for MOSFET safety in high-current BLDC drivers. |
| Wireless Infrastructure Power Sequencing | Building Automation Sensor Interface |
Use Scenario: Validating correct power-up order of RF transceiver, baseband, and PA modules in 5G small cell units. IC Role / Device Role / Timing Role: Dual comparator supervising multiple rail voltages (e.g., 3.3V, 5V, 12V) with independent thresholds and open-collector wired-OR output to FPGA reset controller. Use Value: Open-collector outputs allow single reset line aggregation; 36V supply tolerance supports direct monitoring of higher intermediate rails. | Use Scenario: Converting analog outputs from HVAC temperature/humidity sensors into digital presence signals for BACnet controllers. IC Role / Device Role / Timing Role: Precision comparator converting 0–10V sensor output into clean logic levels; operates from same 24V building power rail. Use Value: Rail-to-rail input range allows direct 0–10V interface without level-shifting; 200µA quiescent current minimizes standby power in always-on nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual open-collector comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | SOIC-8 package (4.9×3.9mm); higher 1.3µs propagation delay; ±4mV max offset voltage over temp | Preferred where board space permits larger footprint and legacy design reuse is prioritized over speed/precision | Select LM393DR only if SOIC-8 mechanical fit is required and 1.3µs delay is acceptable in target timing budget |
| LM2903BPSR | Identical PSOP-8 package and B-version specs, but rated for −40°C to +125°C operating range | Suitable for automotive engine bay or industrial motor drive environments requiring extended temperature support | Choose LM2903BPSR when ambient temperature exceeds +85°C; otherwise LM393PSR-P offers optimal cost/performance for commercial-grade applications |
Compared with LM393DR, LM393PSR-P delivers tighter offset and faster response in a 60% smaller footprint; versus LM2903BPSR, it trades 40°C upper temperature margin for lower unit cost and qualification scope in non-automotive applications.
Availability
LM393PSR-P is available at Aetrix Electronics and suitable for server PSU, cordless power tool, and wireless infrastructure applications requiring stable component supply, long-term manufacturability, and TI-qualified B-version performance enhancements.
Supply support for LM393PSR-P 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 LM393PSR-P belongs to TI's precision comparator product line, engineered for high-reliability signal conditioning in power management, motor control, and sensor interface systems where accuracy, speed, and ruggedness are critical.
FAQ
What is the maximum supply voltage rating for LM393PSR-P?
The LM393PSR-P supports a maximum supply voltage of 36V, as confirmed in Section 5.1 Absolute Maximum Ratings of the TI datasheet SLCS005AH. This 36V rating applies specifically to B-version devices including LM393PSR-P and exceeds the 30V limit of legacy LM393 variants, enabling direct use in 24V and 32V industrial systems without derating.
Does LM393PSR-P require external pull-up resistors on its outputs?
Yes, LM393PSR-P features open-collector outputs and requires external pull-up resistors on both 1OUT and 2OUT pins to establish defined HIGH logic levels. The datasheet specifies typical pull-up values of 5.1kΩ to 5V, but the resistor value must be selected based on sink current requirements (up to 21mA), rise time targets, and the chosen pull-up voltage (up to 36V).
Can LM393PSR-P operate with input voltages below ground?
Yes, LM393PSR-P supports input voltages as low as −0.1V relative to GND, per Section 5.2 Recommended Operating Conditions. This rail-to-rail input capability eliminates the need for negative biasing networks when interfacing with ground-referenced sensors or differential signals, unlike legacy comparators limited to 0V minimum input.
Is LM393PSR-P pin-compatible with standard SOIC-8 LM393 packages?
No, LM393PSR-P uses an 8-pin PSOP (WSON-style) package with 2.0mm × 2.0mm body and 0.5mm pitch, whereas standard SOIC-8 LM393 variants (e.g., LM393DR) measure 4.9mm × 3.91mm with 1.27mm pitch. Mechanical incompatibility requires PCB redesign; however, electrical functionality and pin functions are identical across all 8-pin variants per TI's pin configuration documentation.
What is the guaranteed input offset voltage specification for LM393PSR-P over temperature?
The LM393PSR-P guarantees input offset voltage of ±4mV maximum over its full operating temperature range of −40°C to +85°C, as specified in the Family Comparison Table and Section 5.5 Electrical Characteristics. This is a 55% improvement over the ±9mV limit of standard LM393, directly enhancing accuracy in temperature-sensitive threshold detection.
LM393PSR-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- Open-Collector, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 2V ~ 30V, ±1V ~ 15V
- :
- 5mV @ 5V
- Voltage - Input Offset (Max):
- 0.25µA @ 5V
- Current - Input Bias (Max):
- 6mA (Min)
- Current - Output (Typ):
- 2.5mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- 300ns (Typ)
- Propagation Delay (Max):
- -
- Hysteresis:
- 0°C ~ 70°C (TA)
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SO
LM393PSR-P FAQ
1.How can I place an order for LM393PSR-P through Aetrix?
Please submit a Request for Quotation (RFQ) for LM393PSR-P 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 LM393PSR-P reliable?
The price and inventory of LM393PSR-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM393PSR-P is usually 5 days.
3.What payment methods are accepted for LM393PSR-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM393PSR-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM393PSR-P?
LM393PSR-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM393PSR-P 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 LM393PSR-P?
For technical support, including LM393PSR-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM393PSR-P requirements.
6.How does Aetrix verify that LM393PSR-P is sourced from the original manufacturer or authorized distributors?
All LM393PSR-P 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 LM393PSR-P meets industry standards.
7.What is the process for return or replacement of LM393PSR-P?
All LM393PSR-P units undergo pre-shipment inspection (PSI). If there is an issue with LM393PSR-P, 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 LM393PSR-P part is unused and in its original packaging.
Return procedure for LM393PSR-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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