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Texas Instruments LM393TL
- Part No.:
- LM393TL
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-WFBGA, DSBGA
- Datasheet:
-
LM393TL.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,565
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Product details
Overview
LM393TL from Texas Instruments is a dual, low-power, precision voltage comparator IC with open-collector outputs, designed for single-supply operation from 2.0 V to 36 V. It delivers ±3 mV max input offset voltage, 0.4 mA supply current at 5 V, and input common-mode range extending to ground - enabling direct sensing of near-ground signals in battery-powered and industrial monitoring systems.
For engineers reviewing the LM393TL datasheet, LM393TL pinout, LM393TL application, or LM393TL equivalent, this page provides verified specifications, SOIC-8 package details, real-world use cases including zero-crossing detection and threshold monitoring, and two validated alternative comparators with documented functional and thermal differences.
Technical Context
The LM393TL integrates two independent PNP-input comparators with rail-to-rail input voltage capability up to 36 V differential, and an input common-mode range that includes ground - a key enabler for single-supply level-shifting and low-side current sensing. Its open-collector NPN output stage supports TTL/CMOS logic interfacing and wired-OR configurations.
Each comparator features 25 nA typical input bias current, 5 nA max input offset current, and 250 mV saturation voltage at 4 mA sink current. The device operates across 0°C to +70°C ambient temperature and draws supply current independent of V+, making it stable under varying battery discharge profiles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 36 V single supply (±1.0 V to ±18 V dual) - supports wide-input industrial sensors and automotive battery monitoring without regulation. |
| Input Offset Voltage | ±3 mV max - ensures accurate threshold detection in precision voltage monitoring applications like battery charge-state indication. |
| Supply Current | 0.4 mA typical at 5 V - enables multi-year operation in coin-cell–powered IoT endpoints and portable instrumentation. |
| Input Bias Current | 25 nA typical - allows high-impedance sensor interfaces (e.g., thermistors, photodiodes) without loading error. |
| Output Saturation Voltage | 250 mV at 4 mA - guarantees reliable low-level logic '0' drive into 5 V TTL or 3.3 V CMOS pull-up networks. |
| Input Common-Mode Range | Includes ground (0 V) up to V+−1.5 V - permits direct connection of grounded reference sources and unipolar signal conditioning. |
| Response Time | 1.3 μs typical - sufficient for line-frequency zero-crossing detection, PWM feedback, and slow analog-to-digital conversion. |
Pinout & Package
LM393TL is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package measuring 4.90 mm × 3.91 mm, with standard 1.27 mm pitch and gull-wing leads compatible with automated SMT assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUTA) | Output A | Open-collector NPN output - requires external pull-up resistor; sinks up to 16 mA to ground when active. |
| 2 (−INA) | Inverting Input A | High-impedance PNP base node - accepts reference voltage or feedback signal; biased out of IC. |
| 3 (+INA) | Noninverting Input A | High-impedance PNP base node - connects to sensed signal; common-mode range includes ground. |
| 4 (GND) | Ground | Reference return for both comparators and internal bias network; serves as V− in single-supply mode. |
| 5 (+INB) | Noninverting Input B | Independent high-impedance input for second comparator channel; identical electrical behavior to Pin 3. |
| 6 (−INB) | Inverting Input B | Independent high-impedance input for second comparator channel; identical electrical behavior to Pin 2. |
| 7 (OUTB) | Output B | Open-collector NPN output - electrically isolated from OUTA; supports separate or wired-OR logic functions. |
| 8 (V+) | Positive Supply | Single power rail input - powers both comparators; supply current independent of voltage magnitude (2–36 V). |
Key Features
| Feature | Design Value |
|---|---|
| Ground-sensing input stage | Enables direct interface with 0 V-referenced sensors (e.g., shunt-based current monitors) without level-shifting circuitry. |
| Low 0.4 mA supply current | Reduces quiescent power in always-on systems - critical for battery life in smoke detectors, remote sensors, and wearables. |
| Open-collector outputs | Permits flexible logic interfacing (TTL/CMOS/ECL), bus-wired ORing, and output voltage translation beyond V+ rail. |
| Wide 2–36 V supply range | Eliminates need for dedicated LDOs in mixed-voltage systems - supports direct connection to 3.3 V, 5 V, 12 V, or 24 V rails. |
| ±3 mV max offset voltage | Ensures consistent trip-point accuracy across temperature and unit-to-unit variation in voltage threshold applications. |
Applications
| Battery Voltage Monitor | Industrial Limit Switch |
|---|---|
|
Use Scenario: Detecting low battery condition in handheld medical devices using a resistive divider on a 3.7 V Li-ion cell. IC Role / Device Role / Timing Role: Dual comparator configured as window detector - one channel triggers at 3.0 V (low warning), the other at 2.8 V (critical shutdown). Use Value: 25 nA input bias avoids loading the high-resistance divider; 0.4 mA total supply current extends operational time between charges. |
Use Scenario: Converting analog 4–20 mA loop signals from pressure transmitters into digital ON/OFF control for PLC inputs. IC Role / Device Role / Timing Role: Single comparator compares loop-derived voltage against programmable threshold; output drives optocoupler input. Use Value: Input common-mode range including ground allows direct connection to loop-powered transmitter outputs without floating supplies. |
| AC Zero-Crossing Detector | LED Dimming Threshold Controller |
|
Use Scenario: Generating synchronized timing pulses from 50/60 Hz mains for TRIAC phase-control dimmers and SMPS synchronization. IC Role / Device Role / Timing Role: One comparator channel biased at 0 V (GND) detects polarity reversal of rectified AC waveform. Use Value: Input offset ≤3 mV ensures sub-millisecond timing jitter; open-collector output interfaces directly with microcontroller GPIO interrupt pins. |
Use Scenario: Enabling PWM dimming only above minimum brightness threshold in architectural LED drivers to avoid flicker at low duty cycles. IC Role / Device Role / Timing Role: Second comparator compares DAC output against fixed reference to gate PWM enable signal. Use Value: Independent dual channels allow simultaneous monitoring and control logic in compact space-constrained LED modules. |
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 | Same SOIC-8 package and electrical specs; rated for −40°C to +125°C operating junction temperature (vs. LM393TL's 0°C to +70°C). | Required for automotive under-hood or industrial high-temperature environments where extended thermal margin is mandatory. | Select LM393DR when full industrial temperature range support and TI's enhanced reliability screening are needed. |
| LM2903DT | Identical pinout and function; specified for −40°C to +125°C, with 7 mV max offset voltage (vs. LM393TL's 3 mV) and 1.0 mA max supply current at 36 V. | Suitable for cost-sensitive consumer electronics where tighter offset is not required, and higher supply current is acceptable. | Choose LM2903DT for general-purpose comparator tasks where extended temperature range outweighs precision requirements. |
Compared with LM393TL, LM393DR offers broader temperature coverage without sacrificing offset or supply current performance, while LM2903DT trades precision for wider thermal rating and relaxed quiescent current limits - guiding selection based on thermal, accuracy, and power constraints.
Availability
LM393TL is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial process controllers, and AC line-synchronized power management systems requiring stable component supply across long production lifecycles.
Supply support for LM393TL 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 90 years of innovation in precision analog ICs and broad industrial portfolio support.
The LM393TL belongs to TI's legacy precision comparator family, engineered for robust single-supply operation in cost-sensitive, high-volume applications such as power supplies, motor controls, and sensor interface circuits.
FAQ
What is the maximum operating temperature for the LM393TL?
The LM393TL is specified for operation from 0°C to +70°C ambient temperature. Its junction temperature must remain within this range during use; derating is required above 70°C ambient. This differs from the LM393DR (−40°C to +125°C) and LM2903DT (−40°C to +125°C), which support wider thermal envelopes. Always verify PCB layout thermal resistance when operating near limits.
Does the LM393TL require dual power supplies?
No, the LM393TL is explicitly designed for single-supply operation from 2.0 V to 36 V, with input common-mode voltage range including ground. GND serves as the reference return, eliminating need for negative rails. Dual-supply operation (±1.0 V to ±18 V) is supported but not required - a key advantage for battery-powered and isolated sensor systems.
Can the LM393TL outputs drive LEDs directly?
Yes - each LM393TL output can sink up to 16 mA, sufficient to drive standard indicator LEDs with appropriate series current-limiting resistors. For example, with a 5 V supply and red LED (VF ≈ 1.8 V), a 220 Ω resistor yields ~14.5 mA sink current. Ensure total device power dissipation remains within SOIC-8 thermal limits (510 mW max) when driving multiple loads simultaneously.
What is the purpose of the open-collector output in the LM393TL?
The open-collector output in the LM393TL enables flexible logic interfacing: it allows wired-OR connections of multiple comparators, output voltage translation beyond V+ (e.g., pulling up to 12 V while V+ = 5 V), and direct compatibility with TTL, CMOS, and optocoupler inputs. An external pull-up resistor is mandatory - no internal pull-up exists.
How does the LM393TL handle input voltages exceeding the supply rail?
The LM393TL tolerates differential input voltages up to 36 V and allows either input to exceed V+ (positive overvoltage) without damage, provided the other input remains within the common-mode range (0 V to V+−1.5 V). However, inputs must not go below −0.3 V relative to GND - external clamping diodes are recommended if negative excursions are possible.
LM393TL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-WFBGA, DSBGA
- 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):
- 16mA @ 5V
- Current - Output (Typ):
- 2.5mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- 700ns
- Propagation Delay (Max):
- -
- Hysteresis:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-DSBGA
LM393TL FAQ
1.How can I place an order for LM393TL through Aetrix?
Please submit a Request for Quotation (RFQ) for LM393TL 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 LM393TL reliable?
The price and inventory of LM393TL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM393TL is usually 5 days.
3.What payment methods are accepted for LM393TL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM393TL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM393TL?
LM393TL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM393TL 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 LM393TL?
For technical support, including LM393TL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM393TL requirements.
6.How does Aetrix verify that LM393TL is sourced from the original manufacturer or authorized distributors?
All LM393TL 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 LM393TL meets industry standards.
7.What is the process for return or replacement of LM393TL?
All LM393TL units undergo pre-shipment inspection (PSI). If there is an issue with LM393TL, 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 LM393TL part is unused and in its original packaging.
Return procedure for LM393TL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM393TL 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
STMicroelectronics
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LM393DR
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LM239DR
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LM339APWR
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LM2903P
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LM393ADR
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NCX2200GMAZ
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