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Texas Instruments LM393DGKRG4
- Part No.:
- LM393DGKRG4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM393DGKRG4.pdf
- Description:
- IC COMPARATOR 2 DIFF 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,180
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Product details
Overview
LM393DGKRG4 from Texas Instruments is a dual precision voltage comparator in VSSOP-8 package, featuring 0.37 mV typical input offset voltage, 200 µA per comparator quiescent current, and 1 µs propagation delay. It operates from 2 V to 36 V single supply and supports rail-to-rail input common-mode range down to ground - ideal for overvoltage detection in server PSUs and motor drive enable logic.
For engineers reviewing the LM393DGKRG4 datasheet, LM393DGKRG4 pinout, LM393DGKRG4 application, or LM393DGKRG4 equivalent, key selection factors include its B-version enhanced ESD rating (2 kV HBM), low-input-bias-current design (3.5 nA typ), and compatibility with TTL/MOS/CMOS output loads across industrial temperature range (–40°C to +85°C).
Technical Context
The LM393DGKRG4 implements two independent open-collector comparators with internal ESD clamps, enabling robust operation under transient stress. Its input stage supports differential input voltages up to ±38 V and common-mode inputs extending to VCC – 2 V while maintaining correct output states even when one input exceeds the valid common-mode range.
Quiescent current remains stable across supply voltage (2–36 V) and temperature (–40°C to +85°C), and output sinking capability reaches 21 mA at 5 V with VOL ≤ 400 mV (ISINK = 4 mA). Propagation delay is specified at 1 µs for small-signal steps (100 mV, 5 mV overdrive) under standard load conditions (RL = 5.1 kΩ, CL = 15 pF).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - enables direct use in 3.3 V, 5 V, 12 V, and 24 V systems without level-shifting. |
| Input Offset Voltage (typ) | ±0.37 mV - reduces false triggering in precision threshold detection (e.g., battery cell monitoring). |
| Quiescent Current | 600 µA max (both comparators) - supports low-power always-on sensing in energy-sensitive applications. |
| Propagation Delay | 1 µs (100 mV step, 5 mV overdrive) - suitable for real-time response in motor control feedback loops. |
| Input Bias Current (typ) | 3.5 nA - minimizes loading error on high-impedance sensor sources like thermistors or photodiodes. |
| ESD Rating (HBM) | 2000 V - meets industrial handling requirements without additional external protection. |
| Output Type | Open-collector - allows wired-OR logic, flexible pull-up voltage selection (up to 36 V), and interface with mixed-voltage systems. |
Pinout & Package
VSSOP-8 (DGK) package: 3.00 mm × 3.00 mm body, 0.65 mm pitch, exposed thermal pad connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 output | Open-collector drain - requires external pull-up; sinks up to 21 mA at 5 V. |
| 1IN− | Inverting input (Comp 1) | Accepts signals down to –0.3 V; supports ground-referenced sensing. |
| 1IN+ | Non-inverting input (Comp 1) | Same voltage range as 1IN−; enables flexible reference configuration. |
| GND | Ground reference | Common return for supply and inputs; thermal pad must be soldered to PCB GND plane. |
| 2IN+ | Non-inverting input (Comp 2) | Independent of Comp 1; supports dual-threshold or window-comparator topologies. |
| 2IN− | Inverting input (Comp 2) | Matches 1IN− specs; allows differential or single-ended configurations per channel. |
| 2OUT | Comparator 2 output | Functionally identical to 1OUT; supports independent load switching or OR-ing. |
| VCC | Positive supply | Single supply only; no negative rail required; supports up to 36 V absolute max. |
Key Features
| Feature | Design Value |
|---|---|
| Drop-in B-version upgrade | Replaces legacy LM393/LM293 with improved offset, speed, and ESD - no layout change needed. |
| Rail-to-rail input capability | Common-mode range includes ground and extends to VCC – 2 V - simplifies interfacing with sensors and DACs. |
| Low input bias current | 3.5 nA typical - preserves signal integrity in high-Z source applications (e.g., pH probes, strain gauges). |
| Wide supply voltage range | 2 V to 36 V operation - eliminates need for separate bias rails in multi-voltage systems. |
| Robust output stage | 21 mA sink capability with <400 mV saturation at 4 mA - drives LEDs, relays, or logic directly. |
Applications
| Overvoltage Protection Circuit | Motor Drive Enable Logic |
|---|---|
Use Scenario: Monitoring DC bus voltage in a server PSU to shut down power stage before capacitor overvoltage. IC Role / Device Role / Timing Role: Dual comparator configured as window detector - one channel triggers at upper threshold, second validates lower bound. Use Value: 0.37 mV offset ensures accurate trip points; open-collector outputs interface directly with MOSFET gate drivers. | Use Scenario: Enabling H-bridge driver ICs only when both enable signals and fault flags meet safety criteria. IC Role / Device Role / Timing Role: Comparator 1 checks EN signal > 2.0 V; Comparator 2 verifies FAULT < 0.8 V - outputs wired-OR'd to driver input. Use Value: 1 µs response time guarantees fast shutdown during overcurrent events; 36 V tolerance accommodates bootstrap node monitoring. |
| Battery Cell Balancing Monitor | Industrial Temperature Threshold Alarm |
Use Scenario: Detecting individual Li-ion cell voltage deviation beyond ±25 mV from pack average in BMS hardware. IC Role / Device Role / Timing Role: Each comparator compares cell voltage against reference; outputs feed microcontroller GPIOs. Use Value: 3.5 nA input bias prevents measurement error on high-resistance divider networks; VSSOP-8 saves board space in dense modules. | Use Scenario: Triggering audible alarm when ambient temperature exceeds 75°C in factory automation cabinet. IC Role / Device Role / Timing Role: Comparator compares NTC thermistor voltage to fixed reference; output drives buzzer via transistor. Use Value: –40°C to +85°C operating range matches industrial enclosure environments; 200 µA quiescent current minimizes self-heating error. |
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; same electrical specs but higher thermal resistance (148.5°C/W vs. 193.7°C/W); no exposed thermal pad. | Suitable for lower-power or less thermally constrained designs; not recommended for continuous 21 mA sinking at elevated ambient. | Select LM393DR only if board space allows SOIC footprint and thermal margin exceeds 15°C above ambient. |
| LM2903DGKR | Identical DGK package and pinout; extended temperature range (–40°C to +125°C); otherwise matched B-version specs. | Required for automotive under-hood or industrial motor drive control where junction temperature exceeds 85°C. | Choose LM2903DGKR when ambient operating temperature exceeds 85°C or AEC-Q100 qualification is mandated. |
Compared with LM393DR, LM393DGKRG4 offers superior thermal performance in compact layouts; versus LM2903DGKR, it trades extended temperature rating for cost optimization in commercial-grade applications where 85°C max ambient suffices.
Availability
LM393DGKRG4 is available at Aetrix Electronics and suitable for server PSUs, motor drive enable logic, and industrial temperature threshold alarms requiring stable component supply and long-term production continuity.
Supply support for LM393DGKRG4 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 personal electronics markets.
The LM393B family - including LM393DGKRG4 - was designed to upgrade legacy comparator designs with lower offset, faster response, and enhanced ruggedness while maintaining full pin and functional compatibility.
FAQ
What is the maximum supply voltage rating for LM393DGKRG4?
The LM393DGKRG4 has an absolute maximum supply voltage of 38 V, with recommended operating range from 2 V to 36 V. This allows direct integration into 24 V industrial systems and 36 V battery-powered equipment without external regulation. Exceeding 38 V risks permanent damage, and operation above 36 V voids guaranteed specifications per TI's SLCS005AH datasheet.
Does LM393DGKRG4 support rail-to-rail input operation?
Yes, LM393DGKRG4 supports rail-to-rail input common-mode range: the lower limit includes ground (–0.3 V min), and the upper limit extends to VCC – 2 V. Either input may exceed this range up to VCC without damage, and the comparator maintains correct output state - a key advantage for interfacing with sensors or DACs operating near supply rails.
Can LM393DGKRG4 replace older LM393 variants without PCB changes?
Yes, LM393DGKRG4 is a drop-in replacement for LM393, LM293, and LM2903 in VSSOP-8 (DGK) packages. It shares identical pinout, footprint, and electrical interface - including open-collector outputs and supply voltage compatibility. No PCB modifications are required, though designers should verify thermal performance due to the exposed pad's mandatory GND connection.
What is the typical input bias current of LM393DGKRG4, and why does it matter?
The LM393DGKRG4 has a typical input bias current of 3.5 nA. This ultra-low value minimizes voltage error across high-impedance source impedances - critical when using large-value resistor dividers (e.g., 1 MΩ) for battery voltage monitoring or interfacing with piezoelectric or pH sensors where loading would otherwise distort measurement accuracy.
Is LM393DGKRG4 qualified for automotive applications?
No, LM393DGKRG4 is rated for commercial/industrial temperature range (–40°C to +85°C) and is not AEC-Q200 qualified. For automotive under-hood use, TI recommends LM2903DGKR (–40°C to +125°C) or LM2903QDRQ1 (AEC-Q100 Grade 1). LM393DGKRG4 is appropriate for cabin electronics or non-safety-critical subsystems meeting industrial reliability standards.
LM393DGKRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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-VSSOP
LM393DGKRG4 FAQ
1.How can I place an order for LM393DGKRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM393DGKRG4 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 LM393DGKRG4 reliable?
The price and inventory of LM393DGKRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM393DGKRG4 is usually 5 days.
3.What payment methods are accepted for LM393DGKRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM393DGKRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM393DGKRG4?
LM393DGKRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM393DGKRG4 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 LM393DGKRG4?
For technical support, including LM393DGKRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM393DGKRG4 requirements.
6.How does Aetrix verify that LM393DGKRG4 is sourced from the original manufacturer or authorized distributors?
All LM393DGKRG4 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 LM393DGKRG4 meets industry standards.
7.What is the process for return or replacement of LM393DGKRG4?
All LM393DGKRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM393DGKRG4, 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 LM393DGKRG4 part is unused and in its original packaging.
Return procedure for LM393DGKRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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