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Texas Instruments LM3302DR
- Part No.:
- LM3302DR
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM3302DR.pdf
- Description:
- IC COMPARATOR 4 GEN PUR 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,577
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Product details
Overview
LM3302DR from Texas Instruments is a quad voltage comparator IC designed for single-supply operation (2 V to 28 V) with open-collector outputs, low input bias current (25 nA typ), low input offset voltage (3 mV typ), and TTL/MOS/CMOS-compatible output drive-used in level detection, window comparators, and analog-to-digital interface circuits.
For engineers reviewing the LM3302DR datasheet, LM3302DR pinout, LM3302DR application, or LM3302DR equivalent, key selection considerations include supply-voltage independence of current drain (0.8 mA typ), common-mode input range extending to ground, ±28 V differential input capability, and SOIC-14 packaging with RoHS-compliant NIPDAU finish.
Technical Context
The LM3302DR integrates four independent comparators sharing a single supply rail, each featuring internal current regulation and rail-to-rail input capability down to ground. Its architecture supports wired-AND logic via open-collector outputs and tolerates differential inputs up to ±28 V regardless of supply voltage.
Operation is specified across −40°C to 85°C with guaranteed performance at VCC = 5 V–28 V. Input offset voltage remains ≤20 mV at 25°C and ≤40 mV over full temperature range; low output saturation voltage (150 mV typ at IOL = 4 mA) enables direct interfacing with legacy logic families.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 28 V - supports wide-input industrial and automotive power rails without external regulation |
| Supply Current (4 comp) | 0.8 mA typ - constant across supply range, enabling predictable power budgeting |
| Input Offset Voltage | 3 mV typ / 20 mV max @ 25°C - ensures accurate threshold detection in precision sensing |
| Input Bias Current | 25 nA typ - minimizes loading on high-impedance sensor sources like thermistors or photodiodes |
| Differential Input Range | ±28 V - allows direct comparison of signals beyond supply rails, e.g., battery monitoring |
| Output Type | Open-collector - enables wired-AND logic, level translation, and pull-up flexibility to 28 V |
| Response Time | 0.3 µs (TTL step) - suitable for fast edge detection in clock conditioning and pulse-width monitoring |
Pinout & Package
LM3302DR is housed in a 14-pin SOIC (D package) with 1.27 mm pitch, 8.65 mm × 3.91 mm body, and moisture sensitivity level 1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 5, 6, 8, 9, 12, 13 | Comparator Inputs (IN+, IN−) | Four independent pairs: Pins 1/2 (Comp1), 5/6 (Comp2), 8/9 (Comp3), 12/13 (Comp4) |
| 3, 4, 10, 11 | Comparator Outputs (OUT) | Open-collector outputs requiring external pull-up; support wired-AND logic |
| 7 | GND | Ground reference for all comparators and internal bias circuitry |
| 14 | VCC | Positive supply rail; supports single-supply operation from 2 V to 28 V |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail common-mode input | Includes ground and extends to VCC − 1.5 V - enables direct sensing of 0 V referenced signals |
| Supply-current independence | 0.8 mA typ across 2 V–28 V - eliminates supply-dependent quiescent power variation |
| High differential input tolerance | ±28 V - permits comparison of signals exceeding supply rails, e.g., battery cell voltage monitoring |
| Low propagation delay | 0.3 µs for TTL-level transitions - supports real-time signal edge detection in timing-critical systems |
| Logic-family compatibility | Outputs interface directly with TTL, MOS, and CMOS - no level-shifting circuitry required |
Applications
| Battery Cell Voltage Monitoring | Industrial Threshold Detection |
|---|---|
Use Scenario: Monitoring individual Li-ion or lead-acid cell voltages in multi-cell packs to prevent overcharge/over-discharge. IC Role / Device Role / Timing Role: Quad comparator performs simultaneous high/low threshold comparison per cell using resistor-divider inputs. Use Value: Leverages ±28 V differential input and rail-to-rail common-mode range to measure cells referenced to varying stack potentials without isolation. |
Use Scenario: Detecting pressure, temperature, or flow thresholds in PLC I/O modules with 0–10 V or 4–20 mA analog inputs. IC Role / Device Role / Timing Role: Converts analog sensor outputs into digital logic signals for microcontroller interrupt triggering or relay control. Use Value: Low input bias current (25 nA typ) prevents loading of high-impedance sensor signal paths, preserving accuracy. |
| Power Supply Sequencing Control | Analog Window Comparator |
Use Scenario: Validating correct startup order and voltage levels of multiple DC rails (e.g., 1.8 V, 3.3 V, 5 V, 12 V) in FPGA or ASIC power systems. IC Role / Device Role / Timing Role: Each comparator monitors one rail against a precision reference; outputs feed AND logic to enable downstream regulators. Use Value: Supply-current independence (0.8 mA) ensures stable sequencing behavior across varying input voltages during ramp-up. |
Use Scenario: Detecting whether an analog signal resides within a defined upper/lower bound, such as audio clipping detection or motor current safety limits. IC Role / Device Role / Timing Role: Two comparators form high/low boundaries; third implements hysteresis or status flag, fourth provides spare channel. Use Value: Matched input offset voltage (3 mV typ) minimizes window asymmetry, improving detection repeatability across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339DR | Higher input offset voltage (7 mV typ), wider temp range (−40°C to 125°C), same SOIC-14 package | Preferred for automotive under-hood use; less precise for low-voltage thresholding | Select when extended temperature rating outweighs need for sub-5 mV offset |
| TL331IDBVR | Single-channel, SOT-23-5 package, lower supply current (24 µA), no common-mode-to-ground guarantee | Suitable for space-constrained designs needing only one comparator; not drop-in for quad functions | Choose for miniaturized, low-power single-comparator nodes-not for pin-compatible replacement |
Compared with LM3302DR, LM339DR offers higher temperature resilience but reduced DC precision, while TL331IDBVR trades channel count and input-range assurance for ultra-low power and footprint-neither is pin-compatible, and both require schematic and layout adaptation.
Availability
LM3302DR is available at Aetrix Electronics and suitable for battery management systems, industrial PLC analog I/O, power supply sequencing control, and analog window detection requiring stable component supply and long-term manufacturability.
Supply support for LM3302DR 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 company headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with over 90 years of innovation in industrial, automotive, and consumer electronics.
The LM3302DR belongs to TI's legacy linear comparator family, engineered for robustness in wide-supply industrial environments where reliability, input range, and logic interoperability are prioritized over ultra-low power or nanosecond speed.
FAQ
What is the operating temperature range for the LM3302DR?
The LM3302DR is rated for operation from −40°C to +85°C ambient temperature. This range is validated per TI's characterization data and applies to all electrical specifications in the datasheet, including input offset voltage (≤40 mV max), supply current (0.8 mA typ), and response time (0.3 µs). The SOIC-14 package carries JEDEC MSL Level-1 rating, supporting standard reflow profiles without preconditioning.
Does the LM3302DR support true single-supply operation with inputs at ground?
Yes, the LM3302DR supports true single-supply operation with common-mode input voltage range that includes ground (0 V) up to VCC − 1.5 V at 25°C. This allows direct interfacing with ground-referenced sensors and enables level detection at 0 V thresholds-critical for battery low-voltage alarms and zero-crossing detection circuits using the LM3302DR.
Can the outputs of the LM3302DR be wired together for logic AND functionality?
Yes, the LM3302DR features open-collector outputs explicitly designed for wired-AND configurations. When multiple outputs are tied to a shared pull-up resistor, the net node goes low if any comparator asserts-enabling compact priority encoding, fault-bus signaling, or multi-condition alarm logic without external gates. This behavior is confirmed in the device's functional description and schematic.
What is the maximum differential input voltage the LM3302DR can withstand?
The LM3302DR guarantees safe operation with differential input voltage (IN+ to IN−) up to ±28 V, independent of supply voltage. This specification is listed under Absolute Maximum Ratings and verified across the full operating temperature range. It enables direct comparison of signals referenced to different potentials-such as individual cells in a 24-V battery stack-without external attenuators or isolation.
Is the LM3302DR RoHS compliant and lead-free?
Yes, the LM3302DR is RoHS compliant and lead-free, with "Green (RoHS & no Sb/Br)" eco plan designation and NIPDAU (nickel/palladium/gold) lead finish. TI's packaging addendum confirms compliance with EU RoHS Directive 2011/65/EU for all 10 restricted substances, and the device is qualified for lead-free reflow soldering at 260°C peak temperature (MSL Level-1).
LM3302DR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 4
- Output Type:
- CMOS, MOS, Open-Collector, TTL
- Voltage - Supply, Single/Dual (±):
- 2V ~ 28V, ±1V ~ 14V
- :
- 20mV @ 28V
- Voltage - Input Offset (Max):
- 0.5µA @ 5V
- Current - Input Bias (Max):
- 20mA
- Current - Output (Typ):
- 800µA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 14-SOIC
LM3302DR FAQ
1.How can I place an order for LM3302DR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3302DR 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 LM3302DR reliable?
The price and inventory of LM3302DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3302DR is usually 5 days.
3.What payment methods are accepted for LM3302DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3302DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3302DR?
LM3302DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3302DR 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 LM3302DR?
For technical support, including LM3302DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3302DR requirements.
6.How does Aetrix verify that LM3302DR is sourced from the original manufacturer or authorized distributors?
All LM3302DR 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 LM3302DR meets industry standards.
7.What is the process for return or replacement of LM3302DR?
All LM3302DR units undergo pre-shipment inspection (PSI). If there is an issue with LM3302DR, 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 LM3302DR part is unused and in its original packaging.
Return procedure for LM3302DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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