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Texas Instruments LM239PW
- Part No.:
- LM239PW
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM239PW.pdf
- Description:
- IC COMPARATOR 4 DIFF 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:9,791
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Product details
Overview
LM239PW from Texas Instruments is a quad differential comparator in 14-pin TSSOP package, designed for single-supply operation from 2 V to 30 V. It delivers ±9 mV max input offset voltage (25°C), 1.3 µs typical response time, 2 mA max quiescent current per comparator, and rail-to-rail common-mode input range down to ground-enabling precision voltage window detection in industrial power supply monitoring.
For engineers reviewing the LM239PW datasheet, LM239PW pinout, LM239PW application, or LM239PW equivalent, key selection criteria include its guaranteed operation across –25°C to +85°C, open-collector outputs compatible with TTL/MOS/CMOS logic, and robust input voltage tolerance up to ±36 V differential-critical for fault-detection circuits in motor drives and server PSUs.
Technical Context
The LM239PW implements four independent voltage comparators with high-gain open-loop architecture, supporting single-supply biasing where the negative rail is tied to GND. Its input stage accepts common-mode voltages from ground to VCC – 1.5 V (25°C), and tolerates differential inputs up to ±36 V without damage.
Output stages are open-collector NPN transistors capable of sinking ≥6 mA at 1.5 V saturation, requiring external pull-up resistors. Propagation delay is optimized for TTL-level transitions (0.3 µs typical) and small-signal steps (1.3 µs), with supply current independent of VCC over the full operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 30 V - supports wide-input industrial supplies without regulation |
| Input Offset Voltage (max) | ±9 mV at 25°C - enables accurate threshold detection within 10 mV windows |
| Response Time (typ) | 1.3 µs for 100 mV step - sufficient for line-frequency and mid-speed control loops |
| Quiescent Current (per comparator) | 0.8–2 mA - low-power operation suitable for always-on monitoring circuits |
| Common-Mode Input Range | 0 V to VCC – 1.5 V - allows direct sensing of signals referenced to ground |
| Differential Input Voltage Limit | ±36 V - protects against transient overvoltage on sensor inputs |
| Output Sink Current (min) | 6 mA at VOL = 1.5 V - drives standard LED indicators or logic gates directly |
Pinout & Package
LM239PW is housed in a 14-pin Thin Shrink Small Outline Package (TSSOP) measuring 5.00 mm × 4.40 mm, with exposed pad not present (non-thermal variant). Pin numbering follows standard JEDEC TSSOP layout, with pins 1–7 and 8–14 arranged in two rows.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Comparator 1 output | Open-collector NPN sink - requires external pull-up for logic-high state |
| 2 (IN1−) | Comparator 1 inverting input | Accepts voltage down to –0.3 V; one input may exceed VCC if other remains in valid CMR |
| 3 (IN1+) | Comparator 1 non-inverting input | Same voltage tolerance as IN1−; differential pair defines switching threshold |
| 4 (OUT2) | Comparator 2 output | Independent open-collector output - enables wired-OR logic or shared pull-up |
| 5 (IN2−) | Comparator 2 inverting input | Electrically identical to IN1−; no internal cross-coupling between comparators |
| 6 (IN2+) | Comparator 2 non-inverting input | Supports independent reference configuration per comparator channel |
| 7 (VCC) | Positive supply | Single rail input - eliminates need for dual supplies in battery or DC-bus systems |
| 8 (GND) | Negative supply / reference | System ground return - all inputs and outputs referenced to this node |
| 9 (IN3−) | Comparator 3 inverting input | Third independent channel - enables multi-threshold sequencing (e.g., under/over-voltage) |
| 10 (IN3+) | Comparator 3 non-inverting input | Configurable for hysteresis or fixed-reference comparison |
| 11 (OUT3) | Comparator 3 output | Matches OUT1/OUT2 electrical specs - ensures consistent load drive capability |
| 12 (IN4−) | Comparator 4 inverting input | Fourth channel supports redundancy or auxiliary monitoring (e.g., temperature fault) |
| 13 (IN4+) | Comparator 4 non-inverting input | Enables full quad-window or priority encoder implementation |
| 14 (OUT4) | Comparator 4 output | Final open-collector output - same sink strength and timing as other channels |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail common-mode input range down to GND | Enables direct interface with ground-referenced sensors (e.g., current shunts, thermistors) |
| Open-collector outputs compatible with TTL, MOS, and CMOS | Allows flexible logic-level translation and wired-OR bus configurations without level shifters |
| Guaranteed operation from –25°C to +85°C | Suitable for commercial/industrial environments including factory automation and power tools |
| Input differential voltage tolerance up to ±36 V | Withstands surge transients in motor drive feedback paths and AC rectifier monitoring |
| Low quiescent current independent of supply voltage | Stable power budget across varying input rails - critical for unregulated auxiliary supplies |
Applications
| Overvoltage Protection Circuit | Motor Phase Monitoring |
|---|---|
Use Scenario: Detecting when DC bus voltage exceeds safe limit in a server PSU before triggering shutdown. IC Role / Device Role / Timing Role: Quad comparator configured as window detector with hysteresis, comparing sensed voltage against upper and lower thresholds. Use Value: Prevents catastrophic failure by enabling fast (<2 µs) response to overvoltage events while rejecting noise via adjustable hysteresis. | Use Scenario: Monitoring zero-crossing and phase sequence in a 3-phase BLDC motor controller. IC Role / Device Role / Timing Role: Three comparators condition hall-effect sensor outputs into clean digital logic levels; fourth monitors supply integrity. Use Value: Ensures reliable commutation timing and prevents shoot-through faults through precise edge-aligned signal conditioning. |
| Appliance Door Interlock System | Building Automation Sensor Interface |
Use Scenario: Verifying mechanical door latch position in a commercial oven using dual microswitches. IC Role / Device Role / Timing Role: Two comparators act as logic gates (AND/OR) to validate closed/open states; remaining channels monitor heater enable signals. Use Value: Provides fail-safe interlock with redundant sensing - any mismatch disables heating element immediately. | Use Scenario: Converting analog HVAC temperature and humidity sensor outputs into discrete alarm zones. IC Role / Device Role / Timing Role: Each comparator sets a threshold (e.g., temp >35°C, hum <20%, CO₂ >1000 ppm); outputs feed microcontroller GPIOs. Use Value: Eliminates ADC resource usage and firmware polling - enables immediate interrupt-driven response to environmental hazards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339PW | Wider temperature range (0°C to +70°C vs. –25°C to +85°C); identical pinout and electrical specs except offset voltage (±9 mV max same) | Preferred for cost-sensitive consumer-grade designs where extended cold operation is unnecessary | Select LM339PW only if ambient operating temperature stays above 0°C and qualification to MIL-PRF-38535 Class B is not required |
| LM2901PW | Extended temperature range (–40°C to +125°C); same package; improved ESD rating (2 kV HBM vs. unspecified for LM239) | Required for automotive under-hood or industrial high-temp environments where reliability beyond 85°C is mandatory | Choose LM2901PW when operating ambient exceeds +85°C or AEC-Q100 compliance is needed - no PCB change required |
Compared with LM239PW, LM339PW offers identical functionality at lower cost but sacrifices cold-start capability, while LM2901PW provides broader thermal margin and enhanced ruggedness at modest premium - making LM239PW the optimal balance for commercial industrial equipment.
Availability
LM239PW is available at Aetrix Electronics and suitable for industrial power supplies, motor control systems, and building automation devices requiring stable component supply with traceable sourcing and long-term lifecycle support.
Supply support for LM239PW 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 personal electronics markets.
The LM239PW belongs to TI's legacy quad comparator product line, engineered for robust, low-cost voltage comparison in commercial and industrial applications where precision, reliability, and wide supply range are essential.
FAQ
What is the maximum supply voltage for LM239PW?
The LM239PW supports a maximum supply voltage of 30 V across its VCC and GND pins. This rating applies to both continuous operation and transient conditions, with absolute maximum differential input voltage limited to ±36 V. Operation above 30 V risks exceeding internal junction limits and is not recommended. The LM239PW datasheet specifies 2 V to 30 V as the recommended operating range.
Does LM239PW have rail-to-rail input capability?
The LM239PW features a common-mode input voltage range extending from ground (0 V) to VCC – 1.5 V at 25°C, and to VCC – 2.0 V over full temperature range. While not fully rail-to-rail on the high side, it does support inputs at ground potential - a key advantage for single-supply systems. Neither input may go more than 0.3 V below ground without risking incorrect output or excessive input current.
Can LM239PW outputs be wire-ORed together?
Yes, LM239PW outputs are open-collector NPN transistors and can be safely wire-ORed by connecting them to a shared pull-up resistor. This configuration enables logical OR functions (e.g., fault aggregation) without additional logic gates. Ensure total sink current remains within 25 mA per output and that pull-up voltage does not exceed the absolute maximum output voltage rating of 36 V.
What is the typical propagation delay of LM239PW?
The LM239PW exhibits a typical propagation delay of 1.3 µs for a 100 mV input step with 5 mV overdrive, and 0.3 µs for TTL-level transitions. These values are measured at VCC = 5 V, TA = 25°C, with RL = 5.1 kΩ and CL = 15 pF. Delay increases slightly at lower supply voltages and colder temperatures, remaining under 2 µs across the full operating range.
Is LM239PW pin-compatible with LM339PW?
Yes, LM239PW is pin-compatible with LM339PW in the same TSSOP-14 package. Both share identical pin configuration, electrical interface, and footprint. Key differences lie in temperature grade (LM239PW: –25°C to +85°C; LM339PW: 0°C to +70°C) and minor parametric variations - notably LM339PW has identical offset voltage spec but lacks explicit ESD rating documentation.
LM239PW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 4
- Output Type:
- Open-Collector
- Voltage - Supply, Single/Dual (±):
- 2V ~ 30V, ±1V ~ 15V
- :
- 5mV @ 30V
- Voltage - Input Offset (Max):
- 0.25µA @ 5V
- Current - Input Bias (Max):
- 20mA
- Current - Output (Typ):
- 2mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -25°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 14-TSSOP
LM239PW FAQ
1.How can I place an order for LM239PW through Aetrix?
Please submit a Request for Quotation (RFQ) for LM239PW 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 LM239PW reliable?
The price and inventory of LM239PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM239PW is usually 5 days.
3.What payment methods are accepted for LM239PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM239PW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM239PW?
LM239PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM239PW 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 LM239PW?
For technical support, including LM239PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM239PW requirements.
6.How does Aetrix verify that LM239PW is sourced from the original manufacturer or authorized distributors?
All LM239PW 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 LM239PW meets industry standards.
7.What is the process for return or replacement of LM239PW?
All LM239PW units undergo pre-shipment inspection (PSI). If there is an issue with LM239PW, 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 LM239PW part is unused and in its original packaging.
Return procedure for LM239PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM239PW Tags
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LM2903DR
Texas Instruments
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LM339DR
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LM339PWR
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LM393DT
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LM2901PWR
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LM2903DT
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LM393DR
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LM239DR
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LM339APWR
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LM2903P
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