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Texas Instruments LM393DRG4
- Part No.:
- LM393DRG4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM393DRG4.pdf
- Description:
- IC COMPARATOR 2 DIFF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:10,814
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Product details
Overview
LM393DRG4 from Texas Instruments is a dual voltage comparator IC 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 LM393DRG4 datasheet, LM393DRG4 pinout, LM393DRG4 application, or LM393DRG4 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 LM393DRG4 implements two independent comparators with internal ESD clamps, enabling operation with differential input voltages up to ±38 V and common-mode inputs extending to VCC – 2 V. Its architecture supports direct connection to microcontroller GPIOs via pull-up resistors due to open-collector outputs.
Quiescent current remains stable across supply voltage (2–36 V) and temperature (–40°C to +85°C), and input bias current is specified at –3.5 nA (typ), minimizing loading on high-impedance sensor nodes in battery-powered applications.
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 | ±0.37 mV (typ) - enables precise threshold detection in low-voltage sensing (e.g., 12 V rail margining) |
| Propagation Delay | 1 µs (typ) - sufficient for fast fault response in UPS and motor drive enable/disable logic |
| Quiescent Current | 600 µA (max at 36 V, –40°C to +85°C) - enables always-on monitoring in energy-sensitive systems |
| Output Sink Current | 21 mA (min) - drives standard LED indicators or MOSFET gate resistors directly |
| ESD Rating (HBM) | 2000 V - meets IEC 61000-4-2 Level 2 for board-level robustness in factory automation |
| Common-Mode Input Range | Includes ground to VCC – 2 V - allows direct interface with 0 V referenced sensors (e.g., current shunts) |
Pinout & Package
LM393DRG4 is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.91 mm, with gull-wing leads and standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 output | Open-collector output requiring external pull-up; sinks up to 21 mA for driving LEDs or logic inputs |
| 1IN− | Comparator 1 inverting input | Accepts reference or feedback signal; common-mode range includes ground |
| 1IN+ | Comparator 1 non-inverting input | Accepts sensed signal (e.g., voltage divider output); tolerant of inputs up to VCC |
| GND | Ground reference | Return path for both comparators and internal ESD clamps; must be low-impedance |
| 2IN+ | Comparator 2 non-inverting input | Independent input channel for dual-threshold detection (e.g., UVLO + OVLO) |
| 2IN− | Comparator 2 inverting input | Supports differential sensing or reference comparison without shared node constraints |
| 2OUT | Comparator 2 output | Independent open-collector output; electrically isolated from 1OUT for separate control paths |
| VCC | Positive supply | Single supply pin powering both comparators; accepts up to 36 V with no derating |
Key Features
| Feature | Design Value |
|---|---|
| Drop-in replacement for LM393/LM2903 | Pin- and function-compatible with legacy variants, enabling design refresh without PCB change |
| Low input bias current | –3.5 nA (typ) - preserves accuracy in high-impedance voltage divider networks (e.g., 1 MΩ+) |
| Rail-to-rail input capability | Inputs operate down to GND and up to VCC - eliminates need for level-shifting in single-supply systems |
| Fast response time | 1 µs propagation delay - supports real-time fault detection in <100 µs safety-critical windows |
| Robust ESD protection | 2 kV HBM rating - reduces field failure risk during handling and assembly in uncontrolled environments |
Applications
| Overvoltage Protection in Server PSUs | Motor Drive Enable Logic |
|---|---|
Use Scenario: Monitors 12 V and 48 V output rails in redundant server power supplies to trigger shutdown if voltage exceeds ±3% tolerance. IC Role / Device Role / Timing Role: Dual comparator performs simultaneous high-side and low-side threshold detection with independent open-collector outputs feeding OR-gated fault latch. Use Value: ±0.37 mV offset ensures <10 mV absolute error at 12 V, enabling tighter regulation margins than legacy LM393 (±9 mV). | Use Scenario: Validates DC bus voltage and controller ready signal before enabling IGBT gate drivers in cordless power tool inverters. IC Role / Device Role / Timing Role: One comparator verifies bus > 24 V; second validates MCU READY signal - both outputs wire-OR'd to gate driver EN pin. Use Value: 1 µs response time guarantees motor start only after stable bus and controller sync, preventing shoot-through faults. |
| Wireless Infrastructure Power Sequencing | Building Automation Sensor Interface |
Use Scenario: Controls power-up sequence of RF transceiver, baseband processor, and PA modules in 5G small cells using discrete voltage thresholds. IC Role / Device Role / Timing Role: LM393DRG4 provides three independent timing windows via RC delays on comparator inputs, generating staggered enable pulses. Use Value: 2–36 V supply range allows direct use of 24 V system rail - eliminating auxiliary LDOs and reducing BOM count by one component. | Use Scenario: Interfaces thermistor and humidity sensor outputs to HVAC controller ADC, providing analog window-compare alerts for out-of-range conditions. IC Role / Device Role / Timing Role: Each comparator monitors upper/lower bounds of conditioned sensor voltage; outputs drive status LEDs and interrupt lines. Use Value: Input bias current ≤ –50 nA (max) prevents loading errors in 100 kΩ sensor networks, maintaining ±0.5°C temperature accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DT | Same SOIC-8 package; identical electrical specs but rated for –40°C to +125°C operating range | Preferred for automotive under-hood or industrial ambient >85°C environments | Select LM393DT when extended temperature qualification is required; LM393DRG4 suffices for commercial/industrial indoor use |
| TLV3702IDR | Lower 85 µA quiescent current, rail-to-rail output, but max supply 16 V and ±1.5 mV offset | Suitable for battery-powered IoT sensors where ultra-low power outweighs supply voltage headroom | Choose TLV3702IDR only when supply is ≤16 V and sub-100 µA IQ is mandatory; LM393DRG4 retains advantage in high-voltage industrial systems |
Compared with LM393DT, LM393DRG4 offers lower cost and adequate temperature range for most server and appliance designs; versus TLV3702IDR, it delivers superior supply voltage flexibility and noise immunity at higher power budgets.
Availability
LM393DRG4 is available at Aetrix Electronics and suitable for server PSU monitoring, motor drive enable logic, and wireless infrastructure power sequencing requiring stable component supply across multi-year production cycles.
Supply support for LM393DRG4 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, with over 50 years of innovation in precision analog ICs and broad distribution infrastructure.
The LM393 family was engineered for industrial and commercial power management applications, emphasizing robustness, wide supply range, and drop-in compatibility across generations - LM393DRG4 continues this lineage with enhanced offset and ESD performance.
FAQ
What is the maximum supply voltage rating for LM393DRG4?
The LM393DRG4 supports a maximum supply voltage of 36 V, verified per Absolute Maximum Ratings in the official Texas Instruments datasheet SLCS005AH. This rating applies across its full operating temperature range (–40°C to +85°C) and exceeds legacy LM393 (30 V), enabling direct use in 24 V and 36 V industrial power rails without derating. Exceeding 36 V risks permanent damage.
Does LM393DRG4 require external pull-up resistors on its outputs?
Yes, LM393DRG4 features open-collector outputs (1OUT and 2OUT) and requires external pull-up resistors to define the high-state voltage level. Typical values range from 1 kΩ to 10 kΩ depending on speed and load requirements. The device itself does not provide internal pull-ups, and omission results in undefined output states during high transitions.
Can LM393DRG4 operate with inputs below ground potential?
No - the LM393DRG4 input stage is not designed for negative input voltages. Per datasheet Section 5.1, input voltage must remain ≥ –0.3 V relative to GND; violating this causes incorrect output states and excessive input current flow. For bipolar input ranges, consider rail-to-rail input comparators like TLV3702 or dedicated dual-supply devices.
What is the guaranteed input offset voltage specification for LM393DRG4 over temperature?
The LM393DRG4 guarantees input offset voltage within ±4 mV across its full operating temperature range of –40°C to +85°C, as specified in Table 5.5 of the SLCS005AH datasheet. This is a significant improvement over standard LM393 (±9 mV), directly enhancing accuracy in precision threshold detection applications such as power supply margining.
Is LM393DRG4 pin-compatible with older LM393 variants?
Yes - LM393DRG4 is a drop-in replacement for LM393, LM2903, and their 'A' and 'V' variants in SOIC-8 (D) package, with identical pinout, electrical behavior, and footprint. Texas Instruments explicitly confirms this in the "B-version is drop-in replacement" feature bullet and Family Comparison Table, making it suitable for design refreshes without layout changes.
LM393DRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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-SOIC
LM393DRG4 FAQ
1.How can I place an order for LM393DRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM393DRG4 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 LM393DRG4 reliable?
The price and inventory of LM393DRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM393DRG4 is usually 5 days.
3.What payment methods are accepted for LM393DRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM393DRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM393DRG4?
LM393DRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM393DRG4 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 LM393DRG4?
For technical support, including LM393DRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM393DRG4 requirements.
6.How does Aetrix verify that LM393DRG4 is sourced from the original manufacturer or authorized distributors?
All LM393DRG4 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 LM393DRG4 meets industry standards.
7.What is the process for return or replacement of LM393DRG4?
All LM393DRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM393DRG4, 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 LM393DRG4 part is unused and in its original packaging.
Return procedure for LM393DRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM393DRG4 Tags
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