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Texas Instruments LM293DGKR
- Part No.:
- LM293DGKR
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM293DGKR.pdf
- Description:
- IC COMPARATOR 2 DIFF 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:10,233
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Product details
Overview
LM293DGKR from Texas Instruments is a dual voltage comparator IC designed for single-supply operation across 2 V to 30 V, featuring ±9 mV max input offset voltage, 1.3 µs typical response time, and rail-to-rail input capability down to ground - widely used in overvoltage detection and motor control feedback loops.
For engineers reviewing the LM293DGKR datasheet, LM293DGKR pinout, LM293DGKR application, or LM293DGKR equivalent, this page delivers verified electrical specs, package mapping to VSSOP-8, real-world use cases in industrial power supplies and appliance control, and two validated alternative parts with functional and thermal differentiation.
Technical Context
The LM293DGKR implements open-collector output architecture with independent dual comparators, enabling flexible pull-up configuration per channel. Its input stage supports common-mode voltages from ground to (VCC − 2 V), allowing direct sensing of low-side current shunts or battery terminals without level shifting.
It operates with supply current of 0.45–1 mA per comparator at 5 V, exhibits 50–200 V/mV large-signal gain, and maintains stable propagation delay under varying load capacitance (CL = 15 pF) and overdrive conditions - critical for precision threshold detection in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 30 V - supports wide-input industrial and automotive auxiliary rails without external regulation |
| Input Offset Voltage (max) | ±9 mV over full temperature range - sets minimum detectable differential voltage in sensor interfaces |
| Response Time (typ) | 1.3 µs at 100 mV overdrive - enables fast fault response in UPS and motor drive protection circuits |
| Input Bias Current (max) | −400 nA - minimizes error in high-impedance voltage divider networks (e.g., battery monitoring) |
| Output Sink Current (min) | 6 mA at VOL = 400 mV - drives standard LED indicators or TTL logic directly without buffer stages |
| Common-Mode Input Range | 0 V to (VCC − 2 V) - permits direct connection to ground-referenced sensors and shunt resistors |
| ESD Rating (HBM) | 2000 V - meets basic handling robustness requirements for automated assembly lines |
Pinout & Package
VSSOP-8 (DGK) package: 3.00 mm × 3.00 mm body, 0.65 mm pitch, exposed pad thermally connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 output | Open-collector node requiring external pull-up; sinks current when IN+ < IN− |
| 1IN− | Inverting input (Comp 1) | Reference input node; accepts signals down to GND |
| 1IN+ | Non-inverting input (Comp 1) | Sense input node; supports rail-to-rail common-mode range |
| GND | Ground reference | Return path for supply and inputs; connects to exposed thermal pad |
| 2IN+ | Non-inverting input (Comp 2) | Independent sense input; identical electrical behavior to 1IN+ |
| 2IN− | Inverting input (Comp 2) | Independent reference input; identical electrical behavior to 1IN− |
| 2OUT | Comparator 2 output | Second open-collector output; electrically isolated from 1OUT |
| VCC | Positive supply | Single supply input (2–30 V); powers both comparators and internal circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range down to GND | Enables direct interface with ground-referenced voltage dividers and current-sense amplifiers |
| Open-collector outputs with 6 mA sink capability | Supports wired-OR logic, level translation, and direct driving of LEDs or MOSFET gates |
| Low input bias current (−400 nA max) | Reduces loading error in high-impedance sensor networks (e.g., thermistor or potentiometer interfaces) |
| Stable 1.3 µs propagation delay across temperature | Ensures consistent timing margin in overvoltage lockout and PWM dead-time monitoring |
| 2 kV HBM ESD rating | Provides baseline robustness against handling-induced transients during PCB assembly |
Applications
| Overvoltage Protection Circuit | Motor Drive Current Monitoring |
|---|---|
Use Scenario: Detecting DC bus voltage exceeding safe threshold in server PSUs or industrial inverters. IC Role / Device Role / Timing Role: Dual comparator compares sensed bus voltage against two independent reference levels to trigger shutdown or warning flags. Use Value: ±9 mV offset ensures accurate trip point setting; open-collector outputs interface directly with microcontroller GPIO or latch circuits. | Use Scenario: Monitoring phase current via low-side shunt resistor in BLDC motor controllers. IC Role / Device Role / Timing Role: One comparator detects overcurrent condition; second monitors zero-crossing for commutation timing. Use Value: Rail-to-rail input allows direct shunt sensing at GND potential; 1.3 µs response enables sub-microsecond fault reaction. |
| Appliance Door Interlock System | Industrial Temperature Threshold Alarm |
Use Scenario: Verifying mechanical door closure before enabling high-power heating elements in ovens or washing machines. IC Role / Device Role / Timing Role: Comparator compares reed switch or microswitch voltage against fixed reference to validate safety interlock state. Use Value: Low input bias current prevents false triggering from switch contact resistance; 30 V max supply accommodates legacy 24 V control rails. | Use Scenario: Triggering visual/audible alarm when ambient temperature exceeds preset limit in HVAC or factory automation panels. IC Role / Device Role / Timing Role: Compares thermistor voltage divider output to adjustable reference to assert alarm signal. Use Value: Wide supply range (2–30 V) enables direct use from panel 12 V or 24 V rails; dual channels support high/low limit detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | SOIC-8 package (4.9 × 3.91 mm); same electrical specs but higher thermal resistance (RθJA = 148.5°C/W vs. 193.7°C/W for DGK) | Better suited for through-hole prototyping or lower-density layouts where board space is less constrained | Select LM393DR when manual soldering or legacy footprint compatibility is required |
| LM2903PWR | TSSOP-8 package (3.0 × 4.4 mm); identical VSSOP pinout but 1.4 mm taller; same offset and response specs | Offers improved thermal performance (RθJB = 131.3°C/W) for sustained high-current sinking in compact designs | Choose LM2903PWR when board-level thermal management is critical and height clearance allows TSSOP |
Compared with LM293DGKR, LM393DR provides larger SOIC footprint and lower thermal efficiency but broader distributor availability, while LM2903PWR offers identical functionality in a thermally superior TSSOP variant - both require no schematic changes but may need layout adjustment for package dimensions.
Availability
LM293DGKR is available at Aetrix Electronics and suitable for industrial power supplies, appliance control systems, and motor drive protection circuits requiring stable component supply and long-term manufacturing continuity.
Supply support for LM293DGKR 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 specializing in analog and embedded processing technologies, with decades of expertise in precision signal conditioning and power management ICs.
The LM293 belongs to TI's legacy dual comparator family optimized for cost-sensitive industrial and consumer applications where reliability, wide supply range, and ease of use outweigh ultra-low offset or speed requirements.
FAQ
What is the maximum supply voltage rating for LM293DGKR?
The LM293DGKR has an absolute maximum supply voltage of 36 V, but its recommended operating range is 2 V to 30 V. Operating above 30 V risks exceeding specified electrical characteristics such as input offset drift and propagation delay stability. Always refer to Section 5.1 Absolute Maximum Ratings and Section 5.2 Recommended Operating Conditions in the official LM293DGKR datasheet for design margin validation.
Does LM293DGKR support rail-to-rail input operation?
Yes, LM293DGKR supports rail-to-rail input common-mode voltage from ground (0 V) up to (VCC − 2 V). This allows direct interfacing with ground-referenced sources like current-sense shunts or thermistor dividers without level-shifting circuitry. However, inputs must not go below −0.3 V or above VCC + 0.3 V to avoid damage or incorrect output states, as specified in the Absolute Maximum Ratings table.
Can LM293DGKR drive a 5 V TTL load directly?
Yes, LM293DGKR can drive a 5 V TTL load directly when configured with a 5 V pull-up resistor on its open-collector output. At IOL = 4 mA, the output saturation voltage (VOL) is guaranteed ≤ 400 mV over temperature, satisfying TTL low-level input requirement (< 0.8 V). Ensure external pull-up value is selected to limit current within 6 mA sink capability - e.g., ≥ 830 Ω for 5 V pull-up.
What is the input offset voltage specification for LM293DGKR?
The LM293DGKR has a maximum input offset voltage of ±9 mV over its full operating temperature range (−25°C to +85°C). At 25°C, typical offset is ±2 mV. This parameter defines the smallest differential input voltage required to switch output states and directly impacts accuracy in precision threshold detection circuits using the LM293DGKR.
Is LM293DGKR pin-compatible with LM393DR?
Yes, LM293DGKR (VSSOP-8) and LM393DR (SOIC-8) share identical pin functions and numbering per Figure 4-1 of the datasheet, making them functionally interchangeable at the schematic level. However, their packages differ physically: DGK is 3.0 × 3.0 mm with 0.65 mm pitch, while DR is 4.9 × 3.91 mm with 1.27 mm pitch - requiring PCB footprint redesign for replacement.
LM293DGKR 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:
- Active
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- Open-Collector, Open-Drain, 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:
- -25°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-VSSOP
LM293DGKR FAQ
1.How can I place an order for LM293DGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM293DGKR 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 LM293DGKR reliable?
The price and inventory of LM293DGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM293DGKR is usually 5 days.
3.What payment methods are accepted for LM293DGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM293DGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM293DGKR?
LM293DGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM293DGKR 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 LM293DGKR?
For technical support, including LM293DGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM293DGKR requirements.
6.How does Aetrix verify that LM293DGKR is sourced from the original manufacturer or authorized distributors?
All LM293DGKR 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 LM293DGKR meets industry standards.
7.What is the process for return or replacement of LM293DGKR?
All LM293DGKR units undergo pre-shipment inspection (PSI). If there is an issue with LM293DGKR, 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 LM293DGKR part is unused and in its original packaging.
Return procedure for LM293DGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM293DGKR Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP Semiconductors
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