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Texas Instruments LM393DRG3
- Part No.:
- LM393DRG3
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM393DRG3.pdf
- Description:
- IC COMPARATOR 2 DIFF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,309
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Product details
Overview
LM393DRG3 from Texas Instruments is a dual precision voltage comparator designed for single-supply operation across 2 V to 36 V, featuring ±0.37 mV typical input offset voltage, 200 µA per comparator quiescent current, 1 µs propagation delay, and rail-to-rail input common-mode range including ground - widely deployed in server PSU overvoltage protection circuits.
For engineers reviewing the LM393DRG3 datasheet, LM393DRG3 pinout, LM393DRG3 application, or LM393DRG3 equivalent, key selection criteria include input offset drift over temperature, open-collector output drive capability (21 mA sink), ESD robustness (2 kV HBM), and compatibility with TTL/MOS/CMOS logic interfaces in industrial power monitoring systems.
Technical Context
The LM393DRG3 implements two independent high-gain comparators with internal ESD clamps, enabling operation up to 36 V supply while maintaining low input bias current (3.5 nA typ) and wide differential input voltage range (±38 V). Its open-collector outputs support flexible pull-up configurations and direct interfacing with diverse logic families.
Designed for robustness in noisy industrial environments, the device features guaranteed operation from −40°C to +85°C, input common-mode range extending to VCC − 2 V, and low output saturation voltage (400 mV at 4 mA sink) - critical for accurate threshold detection in motor drive fault sensing and UPS battery monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - supports wide-input industrial power rails without external regulation |
| Input Offset Voltage | ±0.37 mV (typ) - enables precise voltage window detection with <1% error at 50 mV thresholds |
| Quiescent Current | 200 µA per comparator - allows always-on monitoring in energy-sensitive applications |
| Propagation Delay | 1 µs (typ) - ensures fast response to overvoltage/undervoltage events in real-time protection |
| Output Sink Current | 21 mA (min) - drives standard LED indicators or MOSFET gate resistors directly |
| ESD Rating (HBM) | 2 kV - meets IEC 61000-4-2 Level 2 for board-level handling and field reliability |
| Common-Mode Input Range | Includes ground to VCC − 2 V - permits direct sensing of signals referenced to system ground |
Pinout & Package
LM393DRG3 is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.91 mm, with exposed pad not present. Pin functions are validated per TI SLCS005AH datasheet Figure 4-1 and Table 4-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 output | Open-collector node requiring external pull-up; sinks up to 21 mA for direct logic interface |
| 1IN− | Inverting input, comparator 1 | Accepts reference or feedback signal; common-mode range includes ground |
| 1IN+ | Non-inverting input, comparator 1 | Accepts sensed voltage; differential input range extends to ±38 V |
| GND | Ground reference | Return path for both comparators and internal ESD clamps |
| 2IN+ | Non-inverting input, comparator 2 | Independent channel for secondary threshold detection (e.g., under-voltage lockout) |
| 2IN− | Inverting input, comparator 2 | Supports differential sensing or reference comparison without shared bias network |
| 2OUT | Comparator 2 output | Independent open-collector output; enables dual-threshold or redundant monitoring |
| VCC | Positive supply | Single supply input supporting 2–36 V; quiescent current independent of voltage |
Key Features
| Feature | Design Value |
|---|---|
| Low input offset voltage | ±0.37 mV typical enables sub-10 mV threshold accuracy in battery voltage monitors |
| Wide supply voltage range | 2 V to 36 V operation eliminates need for dedicated LDO in multi-rail systems |
| Input bias current | 3.5 nA typical minimizes loading on high-impedance sensor networks (e.g., thermistor dividers) |
| ESD ruggedness | 2 kV HBM rating reduces risk of field failure during assembly or maintenance |
| Temperature range | −40°C to +85°C specified performance supports deployment in uncontrolled industrial enclosures |
Applications
| Server Power Supply Monitoring | Motor Drive Fault Detection |
|---|---|
Use Scenario: Real-time monitoring of +12 V and +5 V rails in 1U server PSUs to trigger shutdown on overvoltage. IC Role / Device Role / Timing Role: Dual comparator performs independent high-side and low-side threshold detection with <1 µs response. Use Value: Prevents CPU/GPU damage by asserting fault signal within 1 µs of excursion beyond ±5% tolerance. | Use Scenario: Detecting phase current imbalance or DC bus overvoltage in BLDC motor inverters. IC Role / Device Role / Timing Role: Comparator 1 monitors bus voltage against 380 V reference; Comparator 2 checks current-sense amplifier output. Use Value: Enables immediate gate driver disable via open-collector output, limiting IGBT short-circuit energy. |
| Uninterruptible Power Supply (UPS) | Industrial Building Automation |
Use Scenario: Battery voltage supervision and AC mains presence detection in line-interactive UPS units. IC Role / Device Role / Timing Role: One comparator compares battery voltage to 10.5 V cutoff; second detects zero-crossing via optocoupler output. Use Value: Ensures clean transfer to battery backup with no dropout, using rail-to-rail input to sense near-ground signals. | Use Scenario: HVAC zone temperature control using NTC thermistors and setpoint potentiometers. IC Role / Device Role / Timing Role: Dual comparator implements hysteresis-based on/off control for heating and cooling actuators. Use Value: Eliminates external hysteresis components; ±0.37 mV offset ensures stable switching at 0.1°C resolution. |
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 |
|---|---|---|---|
| LM393DT | Same SOIC-8 package; identical electrical specs but rated only to +70°C ambient | Limited to commercial-grade equipment; unsuitable for industrial enclosures above 70°C | Select LM393DRG3 when extended temperature operation (−40°C to +85°C) is required |
| LM2903DR | Pin-compatible; wider operating temperature (−40°C to +125°C) but higher 4 mV max offset | Better thermal margin for motor drive junctions; less precise for low-voltage sensing | Choose LM2903DR where ambient exceeds 85°C but offset tolerance >4 mV is acceptable |
Compared with LM393DT and LM2903DR, LM393DRG3 delivers optimal balance of precision (±0.37 mV offset), industrial temperature range, and proven reliability in server PSU and UPS designs - making it the preferred choice for cost-sensitive, high-volume power monitoring where 85°C top-end operation is mandatory.
Availability
LM393DRG3 is available at Aetrix Electronics and suitable for server power supply monitoring, motor drive fault detection, and uninterruptible power supply (UPS) applications requiring stable component supply across long production lifecycles.
Supply support for LM393DRG3 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 LM393 family was engineered for reliable voltage comparison in cost-sensitive power management systems, emphasizing wide supply range, rail-to-rail input, and open-collector flexibility for legacy and modern logic interfacing.
FAQ
What is the maximum supply voltage rating for LM393DRG3?
The LM393DRG3 supports a maximum supply voltage of 36 V, verified per Absolute Maximum Ratings in TI SLCS005AH. This 36 V rating applies specifically to the B-version devices like LM393DRG3 - distinguishing it from legacy LM393 variants rated to 30 V. Operation at 36 V enables direct use in 24 V industrial systems without level-shifting.
Does LM393DRG3 support rail-to-rail input common-mode range?
Yes, LM393DRG3 supports a common-mode input voltage range that includes ground and extends up to VCC − 2 V. This is confirmed in Section 5.5 of the datasheet under VCM specification. The feature allows direct sensing of signals referenced to system ground - essential for battery voltage monitoring and current-sense amplifier outputs in LM393DRG3-based designs.
What is the typical propagation delay of LM393DRG3 at 5 V supply?
The LM393DRG3 exhibits a typical propagation delay of 1 µs at 5 V supply, as specified in Section 5.7 (Switching Characteristics) of the TI SLCS005AH datasheet. This value is measured with TTL-level input step, 5.1 kΩ pull-up, and 15 pF load. The 1 µs response enables fast fault detection in safety-critical power monitoring applications using LM393DRG3.
Can LM393DRG3 outputs drive a 10 kΩ pull-up resistor to 5 V?
Yes, LM393DRG3 outputs can reliably drive a 10 kΩ pull-up resistor to 5 V. With 21 mA sink capability and 400 mV VOL at 4 mA, the output maintains TTL-compatible low state (<0.4 V) even under light loads. This ensures noise margin compliance when interfacing with microcontrollers or logic gates in LM393DRG3-based threshold detection circuits.
Is LM393DRG3 pin-compatible with older LM393 variants?
Yes, LM393DRG3 is pin-compatible with legacy LM393 variants in SOIC-8 (D) package, including LM393DR, LM393DT, and LM393P. Pin configuration matches Figure 4-1 and Table 4-1 in SLCS005AH. However, LM393DRG3 offers improved specs - lower offset, higher supply rating, and enhanced ESD - making it a drop-in upgrade for existing LM393DRG3 designs.
LM393DRG3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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
- :
- 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-SOIC
LM393DRG3 FAQ
1.How can I place an order for LM393DRG3 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM393DRG3 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 LM393DRG3 reliable?
The price and inventory of LM393DRG3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM393DRG3 is usually 5 days.
3.What payment methods are accepted for LM393DRG3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM393DRG3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM393DRG3?
LM393DRG3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM393DRG3 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 LM393DRG3?
For technical support, including LM393DRG3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM393DRG3 requirements.
6.How does Aetrix verify that LM393DRG3 is sourced from the original manufacturer or authorized distributors?
All LM393DRG3 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 LM393DRG3 meets industry standards.
7.What is the process for return or replacement of LM393DRG3?
All LM393DRG3 units undergo pre-shipment inspection (PSI). If there is an issue with LM393DRG3, 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 LM393DRG3 part is unused and in its original packaging.
Return procedure for LM393DRG3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM393DRG3 Tags
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LM339DR
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LM339PWR
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LM393DT
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LM2903DT
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LM239DR
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LM2903P
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