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Texas Instruments LM111JG
- Part No.:
- LM111JG
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-CDIP (0.300", 7.62mm)
- Datasheet:
-
LM111JG.pdf
- Description:
- DIFFERENTIAL COMPARATOR WITH STR
- Quantity:
- Payment:
- Shipping:
Inventory:4,989
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Product details
Overview
LM111JG from Texas Instruments is a single high-speed voltage comparator with open-collector and open-emitter outputs, designed for wide-supply operation (±15 V or single 5 V), 165 ns response time, ±30 V differential input capability, and –55°C to +125°C operating range. It drives relays, lamps, and TTL/MOS logic in precision zero-crossing detection and oscillator circuits.
For engineers reviewing the LM111JG datasheet, LM111JG pinout, LM111JG application, or LM111JG equivalent, this page delivers verified electrical specs, CDIP-8 package details, strobe/balance functionality, output drive limits (50 V/50 mA), and real-world implementation guidance for industrial timing, analog thresholding, and level-shifting designs.
Technical Context
The LM111JG uses a PNP input stage enabling common-mode operation down to VCC– – 0.3 V, supporting rail-to-rail input sensing in dual-supply systems. Its high-gain internal amplifier enables fast decision-making with minimal overdrive-critical for pulse-width modulation and peak-detection circuits.
Output architecture features isolated emitter and collector terminals, allowing independent load referencing to ground, VCC+, or VCC–. Strobe (BAL/STRB) forces high-impedance output regardless of input state, while BALANCE enables external offset trimming via resistor network.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Response time | 165 ns high-to-low (±15 V, 100 mV step, 5 mV overdrive); enables sub-microsecond decision latency in feedback loops. |
| Input offset voltage | Max 4 mV over full temperature range; defines minimum detectable input differential without false triggering. |
| Input bias current | Max 300 nA at full range; ensures minimal loading on high-impedance sensor sources like photodiodes or thermocouples. |
| Output voltage swing | Collector output switches up to 50 V referenced to VCC–; supports direct interface with industrial solenoids and relay coils. |
| Supply voltage range | ±15 V or single 5 V (VCC+ = 5 V, VCC– = GND); allows coexistence with logic ICs and legacy op-amp rails. |
| Operating temperature | –55°C to +125°C; qualified for military, aerospace, and extended-temperature industrial control environments. |
| Strobe input current | –3 mA to –5 mA required to disable output; mandates active-current sourcing-not passive pull-down-for reliable blanking. |
Pinout & Package
LM111JG is housed in an 8-pin Ceramic Dual In-line Package (CDIP) measuring 9.60 mm × 6.67 mm, with hermetic sealing suitable for high-reliability applications. Pin 1 is EMIT OUT; pin numbering follows standard DIP orientation with notch-left identification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EMIT OUT | Emitter output terminal | Open-emitter output; connects load between VCC– and this pin for low-side switching with adjustable VOL. |
| 2 - IN+ | Noninverting input | High-impedance PNP input; accepts signals down to VCC– – 0.3 V; used as reference or signal input in comparator configurations. |
| 3 - IN− | Inverting input | High-impedance PNP input; differential comparison node; common-mode range extends to VCC– – 0.3 V. |
| 4 - VCC− | Negative supply rail | Reference for internal circuitry and output stage; all outputs can be referenced to this node or ground/VCC+. |
| 5 - BALANCE | Offset null adjustment | Connects external potentiometer (typically 10 kΩ) between VCC+ and VCC– to trim input offset voltage to ≤1 mV. |
| 6 - BAL/STRB | Strobe control input | Current-sink input; pulling –3 mA disables both outputs (high-Z), enabling synchronized blanking in multiplexed systems. |
| 7 - COL OUT | Collector output terminal | Open-collector NPN output; connects load between VCC+ and this pin for high-side switching up to 50 V/50 mA. |
| 8 - VCC+ | Positive supply rail | Primary power input; supports 3.5 V to 30 V total supply range (VCC+ – VCC–); bypass capacitor recommended. |
Key Features
| Feature | Design Value |
|---|---|
| Strobe-enabled output disable | Active-low current-driven strobe (BAL/STRB) forces high-impedance output state independent of input differential-essential for time-gated measurements. |
| Independent emitter/collector outputs | Dual open-terminal outputs allow simultaneous high-side (COL OUT) and low-side (EMIT OUT) switching with separate load references-no shared emitter path. |
| Rail-to-rail input common-mode range | Operates with inputs as low as VCC– – 0.3 V and as high as VCC+ – 1.5 V (at TA = 25°C); eliminates need for level-shifting in bipolar supply systems. |
| Wide supply compatibility | Functions identically across ±15 V op-amp rails and +5 V logic supplies-reduces BOM count in mixed-voltage systems. |
| Wire-OR output capability | Multiple LM111JG devices can share a single pull-up resistor on COL OUT lines-enables simple OR logic for fault monitoring or priority encoding. |
Applications
| Zero-Crossing Detection | Oscillator & Multivibrator |
|---|---|
|
Use Scenario: Detecting AC waveform polarity transitions in motor control, power inverters, and energy metering. IC Role / Device Role / Timing Role: Voltage comparator comparing sinusoidal input to ground reference; generates clean digital edge at each zero crossing. Use Value: 165 ns propagation delay ensures sub-cycle timing accuracy; open-collector output directly interfaces with optocouplers or microcontroller interrupt pins. |
Use Scenario: Generating stable square-wave clocks in function generators, PWM modulators, and clock recovery circuits. IC Role / Device Role / Timing Role: Core timing element in free-running multivibrator topology using RC feedback and internal hysteresis. Use Value: Strobe input enables external synchronization or duty-cycle modulation; dual outputs support complementary waveform generation. |
| Relay & Solenoid Driver | Peak Detector Interface |
|
Use Scenario: Directly switching 24 V/12 V industrial relays and pneumatic solenoids in PLC I/O modules and HVAC controllers. IC Role / Device Role / Timing Role: High-voltage comparator output stage driving inductive loads via external transistor or directly through COL OUT. Use Value: 50 V output rating and 50 mA sink capability eliminate need for driver transistors in low-power actuation; strobe prevents spurious activation during power-up. |
Use Scenario: Capturing positive/negative signal peaks in audio processing, battery voltage monitoring, and sensor signal conditioning. IC Role / Device Role / Timing Role: Comparator with diode-capacitor hold circuit; triggers latch-on rising/falling edges of analog input envelope. Use Value: Low input bias current (≤300 nA) preserves charge on hold capacitor; BALANCE pin enables precise threshold calibration against drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM311P | Same pinout and core functionality, but rated only for 0°C to +70°C; higher input offset voltage (max 7.5 mV). | Not suitable for extended-temperature or military-grade deployments where LM111JG's –55°C to +125°C range is required. | Select LM311P only for commercial-grade cost-sensitive designs with ambient temperature constraints. |
| LM211D | SOIC-8 package; specified for –40°C to +85°C; slightly higher input bias current (max 250 nA vs. 300 nA). | Lacks hermetic CDIP packaging; unsuitable for high-humidity, vacuum, or radiation-prone environments where LM111JG excels. | Choose LM211D for surface-mount production where thermal performance and board space outweigh reliability requirements. |
Compared with LM311P and LM211D, the LM111JG provides the widest temperature range and hermetic ceramic packaging-making it the sole choice for aerospace, defense, and downhole instrumentation where long-term parametric stability under thermal stress is non-negotiable.
Availability
LM111JG is available at Aetrix Electronics and suitable for industrial control systems, aerospace avionics, and high-reliability test equipment requiring stable component supply across extreme temperature cycles and long service life.
Supply support for LM111JG 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 heritage in precision linear ICs and high-reliability components.
The LM111JG belongs to TI's legacy high-speed comparator product line, engineered specifically for demanding applications requiring wide supply range, robust output drive, and guaranteed operation across military temperature extremes.
FAQ
What is the maximum supply voltage rating for LM111JG?
The LM111JG supports a total supply voltage (VCC+ – VCC–) up to 36 V, with individual rail limits of +18 V on VCC+ and –18 V on VCC–. Absolute maximum ratings must not be exceeded-even transiently-as permanent device damage may occur. For reliable operation, TI recommends staying within the recommended 3.5 V to 30 V range.
Can LM111JG operate from a single 5-V supply?
Yes, the LM111JG can operate from a single 5-V supply by connecting VCC– to ground and VCC+ to +5 V. Input common-mode range remains functional from 0.5 V to 3.5 V, and output stages retain full compatibility with TTL and CMOS logic levels. Pull-up resistors on COL OUT are required for proper logic-level generation.
How does the BAL/STRB pin function in LM111JG?
The BAL/STRB pin serves dual purpose: as a strobe input (sinking –3 mA to –5 mA disables both outputs) and as a balance control when used with external resistors. It must never be shorted to ground-only actively current-driven-to avoid latch-up or undefined behavior. TI's Figure 18 shows correct implementation with a series resistor and current source.
What is the purpose of the EMIT OUT pin on LM111JG?
The EMIT OUT pin provides an open-emitter output stage isolated from VCC–, enabling low-side switching with user-defined saturation voltage (VOL). When paired with a pull-down load to VCC–, it delivers precise low-level output voltage-critical for analog thresholding and current-source configurations where COL OUT's collector-sink behavior is insufficient.
Is LM111JG pin-compatible with LM311P or LM211D?
Yes-LM111JG shares identical 8-pin DIP pinout with LM311P (PDIP) and LM211D (SOIC), including matching IN+, IN−, VCC+, VCC−, COL OUT, EMIT OUT, BALANCE, and BAL/STRB assignments. However, differences in temperature range, packaging, and absolute max ratings require validation before drop-in substitution in mission-critical designs.
LM111JG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-CDIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Differential
- Number of Elements:
- 1
- Output Type:
- Open-Collector, Open-Emitter
- Voltage - Supply, Single/Dual (±):
- 3.5V ~ 30V, ±1.75V ~ 15V
- :
- 3mV @ ±15V
- Voltage - Input Offset (Max):
- 0.1µA @ ±15V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 5mA, 6mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- 165ns (Typ)
- Propagation Delay (Max):
- -
- Hysteresis:
- -55°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Through Hole
- :
- 8-CDIP
LM111JG FAQ
1.How can I place an order for LM111JG through Aetrix?
Please submit a Request for Quotation (RFQ) for LM111JG 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 LM111JG reliable?
The price and inventory of LM111JG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM111JG is usually 5 days.
3.What payment methods are accepted for LM111JG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM111JG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM111JG?
LM111JG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM111JG 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 LM111JG?
For technical support, including LM111JG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM111JG requirements.
6.How does Aetrix verify that LM111JG is sourced from the original manufacturer or authorized distributors?
All LM111JG 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 LM111JG meets industry standards.
7.What is the process for return or replacement of LM111JG?
All LM111JG units undergo pre-shipment inspection (PSI). If there is an issue with LM111JG, 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 LM111JG part is unused and in its original packaging.
Return procedure for LM111JG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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