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Texas Instruments LM393PSRG4
- Part No.:
- LM393PSRG4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
LM393PSRG4.pdf
- Description:
- IC COMPARATOR 2 DIFF 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,603
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Product details
Overview
LM393PSRG4 from Texas Instruments is a dual precision voltage comparator in SOIC-8 package, featuring 0.37mV typical input offset voltage, 200µA per comparator supply current, 1µs propagation delay, and rail-to-rail input common-mode range extending to ground. It operates from 2V to 36V single supply and is used in overvoltage protection circuits within server power supplies.
For engineers reviewing the LM393PSRG4 datasheet, LM393PSRG4 pinout, LM393PSRG4 application, or LM393PSRG4 equivalent, this page delivers verified electrical specs, validated pin functions, real-world use cases in industrial power systems, and confirmed drop-in alternatives for design continuity and sourcing flexibility.
Technical Context
The LM393PSRG4 implements two independent open-collector comparators with internal ESD clamps enabling 2kV HBM robustness. Its input stage supports common-mode voltages down to ground and up to VCC − 2V, while differential input tolerance reaches ±38V - exceeding legacy LM393 versions.
Output stages are designed for TTL/MOS/CMOS compatibility with 25mA sink capability and low saturation voltage (400mV at 4mA), enabling direct interface with microcontroller GPIOs or discrete pull-up networks without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2V to 36V - supports wide-input industrial and telecom power rails without external regulation |
| Input Offset Voltage (typ) | ±0.37mV - enables accurate threshold detection in battery monitoring and sensor signal conditioning |
| Quiescent Current | 200µA per comparator - allows always-on monitoring in low-power embedded systems |
| Propagation Delay | 1µs - provides fast response for overvoltage shutdown in server PSUs and motor drives |
| Input Bias Current (typ) | 3.5nA - minimizes loading error on high-impedance sources like thermistors or photodiodes |
| ESD Rating (HBM) | 2kV - meets IEC 61000-4-2 Level 2 for board-level handling and system integration |
| Output Sink Current | 25mA - drives LEDs, relays, or logic inputs directly without external buffer transistors |
Pinout & Package
LM393PSRG4 is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package measuring 4.90mm × 3.91mm, with gull-wing leads and standard JEDEC MS-012AC footprint. Thermal performance is characterized by RθJA = 148.5°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 output | Open-collector output requiring external pull-up; sinks up to 25mA to GND |
| 1IN− | Inverting input of comparator 1 | Differential input node; accepts voltage down to −0.3V (with clamp diode conduction) |
| 1IN+ | Non-inverting input of comparator 1 | Differential input node; common-mode range includes ground and extends to VCC − 2V |
| GND | Ground reference | Return path for supply current and output sinking; must be low-impedance for noise immunity |
| 2IN+ | Non-inverting input of comparator 2 | Independent input channel; identical electrical behavior to 1IN+ |
| 2IN− | Inverting input of comparator 2 | Independent input channel; identical electrical behavior to 1IN− |
| 2OUT | Comparator 2 output | Open-collector output; electrically isolated from 1OUT but shares same VCC/GND |
| VCC | Positive supply | Single-supply input supporting 2V–36V; quiescent current independent of voltage |
Key Features
| Feature | Design Value |
|---|---|
| Drop-in replacement for LM393/LM293 | Pin-compatible with legacy SOIC-8 variants; no PCB changes required for B-version upgrade |
| Rail-to-rail input common-mode range | Accepts signals from GND to VCC − 2V - eliminates need for input biasing resistors in single-supply designs |
| Low propagation delay | 1µs response time ensures timely fault detection in safety-critical overvoltage and overcurrent circuits |
| High ESD ruggedness | 2kV HBM rating reduces risk of field failure during assembly or system-level ESD events |
| Wide supply voltage operation | 2V–36V range supports both low-voltage IoT sensors and high-voltage industrial control rails |
Applications
| Overvoltage Protection in Server PSUs | Motor Drive Enable Logic |
|---|---|
Use Scenario: Monitors DC bus voltage in 12V/48V server power supplies to trigger shutdown before MOSFET overvoltage failure. IC Role / Device Role / Timing Role: Dual comparator compares sensed bus voltage against precision reference; one channel for primary trip, second for hysteresis or redundancy. Use Value: 0.37mV offset enables ±10mV trip accuracy; 1µs delay ensures sub-microsecond response to transient surges. | Use Scenario: Validates encoder feedback and thermal sensor status before enabling gate drivers in BLDC motor controllers. IC Role / Device Role / Timing Role: Comparator 1 checks temperature threshold; comparator 2 validates position zero-crossing - both outputs feed AND logic to enable driver IC. Use Value: Rail-to-rail inputs accept direct connection to NTC thermistors and Hall sensors; 200µA quiescent current minimizes standby loss. |
| Wireless Infrastructure Power Sequencing | Appliance Safety Interlock Monitoring |
Use Scenario: Verifies correct sequencing of +3.3V, +5V, and +12V rails in 5G base station RF modules before enabling PA bias. IC Role / Device Role / Timing Role: Each comparator monitors one rail against a resistor-divider reference; outputs drive FPGA configuration pins or enable latches. Use Value: 36V absolute max rating tolerates 12V rail overshoot; 2kV ESD rating withstands board handling prior to final assembly. | Use Scenario: Detects door latch closure and water-level float switch actuation in washing machines to prevent unsafe spin cycles. IC Role / Device Role / Timing Role: One comparator reads mechanical switch state; second monitors float switch - both outputs feed safety MCU via optocouplers. Use Value: Open-collector outputs simplify isolation interface; GND-referenced inputs eliminate need for level shifters with 5V microcontrollers. |
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; A-grade with ±4mV max offset (vs. ±4mV for LM393PSRG4); 1.3µs response time | Limited to 0°C–70°C ambient; lower ESD (2kV HBM same, but no dedicated clamps) | Select when cost sensitivity outweighs need for extended temp range or enhanced ruggedness |
| LM2903PSR | SOIC-8; −40°C to +125°C operating range; identical 0.37mV offset and 1µs delay; same 2kV HBM | Optimized for automotive under-hood environments; pinout and functionally identical | Choose for industrial designs requiring extended temperature qualification beyond commercial grade |
Compared with LM393DR and LM2903PSR, LM393PSRG4 offers the optimal balance of commercial-grade temperature range (−40°C to +85°C), best-in-class offset and speed, and TI's B-version ESD hardening - making it ideal for server, telecom, and factory automation where reliability and timing precision are critical.
Availability
LM393PSRG4 is available at Aetrix Electronics and suitable for server power supplies, motor drive enable logic, and wireless infrastructure power sequencing requiring stable component supply across multi-year production cycles.
Supply support for LM393PSRG4 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 communications markets.
The LM393B family - including LM393PSRG4 - was engineered to replace legacy comparators with improved offset, speed, supply range, and ESD robustness while maintaining full pin and functional compatibility.
FAQ
What is the maximum supply voltage rating for LM393PSRG4?
The LM393PSRG4 has an absolute maximum supply voltage of 38V, with recommended operation from 2V to 36V. This extended rating enables safe use in 24V and 36V industrial systems where transient overvoltages may occur, unlike older LM393 variants limited to 30V or 32V.
Does LM393PSRG4 support rail-to-rail input operation?
Yes, LM393PSRG4 supports rail-to-rail input common-mode voltage range, including ground (V−) and up to VCC − 2V. This allows direct interfacing with sensors, resistive dividers, and other single-supply circuitry without external biasing networks - a key advantage over earlier generations.
Is LM393PSRG4 pin-compatible with standard LM393 SOIC-8 devices?
Yes, LM393PSRG4 is fully pin-compatible with legacy LM393, LM293, and LM393A in SOIC-8 packages. It is a B-version drop-in replacement with identical pinout, footprint, and electrical interface - enabling seamless upgrade without PCB redesign.
What is the typical input offset voltage of LM393PSRG4, and how does it affect precision sensing?
The LM393PSRG4 has a typical input offset voltage of ±0.37mV, with a maximum of ±4mV over temperature. This low offset enables accurate threshold detection in applications such as battery cell voltage monitoring and temperature-sensor zero-crossing, reducing calibration burden and improving system accuracy.
Can LM393PSRG4 drive a 5V logic input directly?
Yes, LM393PSRG4 outputs are open-collector and compatible with TTL, MOS, and CMOS logic families. When paired with a 5V pull-up resistor, its output can directly drive 5V microcontroller GPIOs or logic gates - provided the sink current remains within 25mA limit and VOL stays below 400mV at 4mA load.
LM393PSRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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
- :
- 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:
- Surface Mount
- :
- 8-SO
LM393PSRG4 FAQ
1.How can I place an order for LM393PSRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM393PSRG4 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 LM393PSRG4 reliable?
The price and inventory of LM393PSRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM393PSRG4 is usually 5 days.
3.What payment methods are accepted for LM393PSRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM393PSRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM393PSRG4?
LM393PSRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM393PSRG4 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 LM393PSRG4?
For technical support, including LM393PSRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM393PSRG4 requirements.
6.How does Aetrix verify that LM393PSRG4 is sourced from the original manufacturer or authorized distributors?
All LM393PSRG4 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 LM393PSRG4 meets industry standards.
7.What is the process for return or replacement of LM393PSRG4?
All LM393PSRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM393PSRG4, 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 LM393PSRG4 part is unused and in its original packaging.
Return procedure for LM393PSRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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