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Texas Instruments LM111JGB
- Part No.:
- LM111JGB
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-CDIP (0.300", 7.62mm)
- Datasheet:
-
LM111JGB.pdf
- Description:
- DIFFERENTIAL COMPARATOR WITH STR
- Quantity:
- Payment:
- Shipping:
Inventory:3,985
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Product details
Overview
LM111JGB from Texas Instruments is a high-speed differential voltage comparator in an 8-pin CDIP package, featuring 165 ns response time, ±15 V dual-supply or 5 V single-supply operation, and open-collector output capable of switching up to 50 V at 50 mA - used in precision zero-crossing detection and relay control circuits.
For engineers reviewing the LM111JGB datasheet, LM111JGB pinout, LM111JGB application, or LM111JGB equivalent, this page delivers verified electrical specs, validated pin functions, confirmed thermal metrics for CDIP-8, and real-world implementation guidance for industrial timing, level-shifting, and strobed comparator systems.
Technical Context
The LM111JGB employs a PNP input stage enabling input common-mode operation down to VCC− − 0.3 V, with offset balancing via external resistors on BALANCE and BAL/STRB pins. Its output stage uses an isolated-emitter NPN transistor, allowing independent setting of low-level output voltage (VOL) through emitter termination.
Strobe functionality is implemented as a current-sink input (–3 mA to –5 mA), disabling output regardless of input differential when active. The device supports wire-OR connection of multiple outputs and operates across –55°C to +125°C, distinguishing it from LM211 (–40°C to +85°C) and LM311 (0°C to +70°C).
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 10 mV over full temperature range; defines minimum detectable input differential without trimming. |
| Input bias current | Max 300 nA at 25°C; permits high-impedance sensor interfacing without significant loading error. |
| Output voltage swing | Collector output switches up to 50 V (LM111), emitter output referenced to VCC−; supports direct relay/lamp drive. |
| Supply range | ±15 V or single 5 V; interoperates with legacy op-amp rails and modern logic supplies without level shifters. |
| Common-mode range | –14.7 V to +13.8 V (±15 V supply); allows inputs near negative rail - critical for ground-referenced signal comparison. |
| ESD rating | ±500 V HBM; meets standard handling requirements for industrial assembly environments. |
Pinout & Package
LM111JGB is housed in an 8-pin Ceramic Dual In-line Package (CDIP), body size 9.60 mm × 6.67 mm, with hermetic sealing suitable for military and high-reliability applications. Pin 1 is EMIT OUT; pin 4 is VCC−; pin 5 is BALANCE; pin 6 is BAL/STRB; pin 7 is COL OUT; pin 8 is VCC+.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EMIT OUT (Pin 1) | Emitter output terminal | Provides low-side switch node referenced to VCC−; enables precise VOL control via external emitter resistor. |
| IN+ (Pin 2) | Noninverting input | Accepts reference or signal input; PNP input stage allows operation within 0.3 V of VCC−. |
| IN− (Pin 3) | Inverting input | Accepts threshold or inverted signal; differential comparison determines output state. |
| VCC− (Pin 4) | Negative supply rail | Reference for emitter output and input common-mode; supports dual- or single-supply configurations. |
| BALANCE (Pin 5) | Offset null adjustment | Connects to external potentiometer for manual input offset cancellation; improves DC accuracy. |
| BAL/STRB (Pin 6) | Strobe enable / balance auxiliary | Current-sink input (–3 mA min); forces output high-impedance when active - enables synchronized sampling. |
| COL OUT (Pin 7) | Collector output | Open-collector NPN output; requires external pullup; drives loads up to 50 V / 50 mA. |
| VCC+ (Pin 8) | Positive supply rail | Power source for internal circuitry; sets upper limit for output pullup voltage and common-mode range. |
Key Features
| Feature | Design Value |
|---|---|
| Strobe-enabled output disable | Active-low current-sink strobe (BAL/STRB) forces high-impedance output independently of input - enables time-gated comparisons. |
| Isolated-emitter output stage | EMIT OUT pin decouples emitter from VCC−, permitting user-defined VOL via external resistor - eliminates need for level-shifting buffers. |
| Wide supply compatibility | Operates from ±15 V (op-amp rails) or +5 V (TTL/CMOS logic), reducing system power domain complexity. |
| Wire-OR output capability | Multiple LM111JGB outputs can share a single pullup resistor - simplifies multi-input OR logic without external gates. |
| High-voltage output switching | COL OUT rated for 50 V at 50 mA - directly drives relays, lamps, and optocouplers without external transistors. |
Applications
| Zero-Crossing Detection | Relay Control Interface |
|---|---|
Use Scenario: Monitoring AC mains waveform to trigger switching at voltage zero crossings for EMI reduction in solid-state relays. IC Role / Device Role / Timing Role: Voltage comparator detecting polarity reversal between IN+ (AC signal) and IN− (ground reference), with strobe synchronized to microcontroller timing. Use Value: 165 ns response ensures accurate zero-cross capture within 10 µs of actual crossing, minimizing conduction angle error. |
Use Scenario: Driving electromagnetic relays in industrial PLC I/O modules requiring galvanic isolation and high-voltage load switching. IC Role / Device Role / Timing Role: High-side or low-side switch controller using COL OUT to sink relay coil current, with EMIT OUT enabling ground-referenced coil return. Use Value: 50 V / 50 mA output rating eliminates external driver transistors, reducing BOM count and PCB area in DIN-rail mounted controllers. |
| Oscillator & Multivibrator | Peak Detector Circuit |
Use Scenario: Building free-running 100-kHz square-wave oscillators using hysteresis feedback through BAL/STRB and external RC network. IC Role / Device Role / Timing Role: Core timing element comparing capacitor voltage against fixed threshold, with BALANCE pin adjusting hysteresis window. Use Value: Sub-microsecond propagation delay ensures stable frequency generation with <1% jitter at 100 kHz under varying supply conditions. |
Use Scenario: Capturing positive or negative signal peaks in instrumentation front-ends for analog-to-digital conversion conditioning. IC Role / Device Role / Timing Role: Comparator latching peak amplitude onto hold capacitor via diode switch controlled by COL OUT state. Use Value: Low 300 nA input bias current prevents discharge of hold capacitor during acquisition, maintaining >10-second hold accuracy. |
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 function, but rated for 0°C to +70°C only; lower max input offset (7.5 mV vs 10 mV) and reduced output voltage (40 V vs 50 V). | Suitable for commercial-grade embedded systems where extended temperature range is unnecessary. | Select LM311P only if operating ambient stays within 0–70°C and 40 V output headroom suffices. |
| LM211D | SOIC-8 package; identical electrical specs to LM111JGB except temperature range (–40°C to +85°C) and thermal resistance (RθJA = 114.3°C/W vs 57.5°C/W for CDIP). | Preferred for surface-mount production and automated assembly; less suited for high-reliability or hermetic environments. | Choose LM211D for cost-sensitive, volume-manufactured boards where CDIP handling and hermeticity are not required. |
Compared with LM311P and LM211D, LM111JGB uniquely combines military-grade temperature range (–55°C to +125°C), hermetic CDIP packaging, and 50 V output capability - making it the sole option for aerospace, downhole, or extended-temperature industrial control where reliability trumps footprint or cost.
Availability
LM111JGB is available at Aetrix Electronics and suitable for industrial automation, aerospace avionics, and high-reliability test equipment requiring stable component supply across extreme temperature cycles and long product lifecycles.
Supply support for LM111JGB 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 high-reliability components.
The LM111 series belongs to TI's legacy high-speed comparator product line, designed specifically for demanding industrial, military, and aerospace applications requiring wide supply range, rail-to-rail input capability, and robust output drive.
FAQ
What is the maximum operating temperature range for LM111JGB?
The LM111JGB is specified for operation from –55°C to +125°C, verified per MIL-PRF-38535 requirements for high-reliability applications. This exceeds the LM211 (–40°C to +85°C) and LM311 (0°C to +70°C) ranges, making LM111JGB suitable for extreme-environment deployments such as downhole oilfield tools or airborne flight control systems. All parameters in the LM111JGB datasheet are tested across this full range unless otherwise noted.
Can LM111JGB operate from a single 5-V supply?
Yes, LM111JGB can operate from a single 5-V supply with VCC+ = 5 V and VCC− = 0 V (ground). In this configuration, the input common-mode range extends from 0.5 V to 3.5 V, and the collector output can drive loads up to 5 V with appropriate pullup. The device maintains 165 ns response time and retains strobe and offset balance functionality - enabling direct integration into 5-V microcontroller-based systems without level-shifting circuitry.
How does the BAL/STRB pin function in LM111JGB?
The BAL/STRB pin on LM111JGB serves dual roles: as a strobe input (current-sink, –3 mA to –5 mA) that forces high-impedance output regardless of input state, and as an auxiliary offset balance terminal when used with external resistors. When used as strobe, it must be driven with current - never shorted to ground - to avoid damage. This enables precise time-gated comparisons in data acquisition or synchronized switching applications where LM111JGB output must be disabled during specific intervals.
What is the purpose of the EMIT OUT pin on LM111JGB?
The EMIT OUT pin on LM111JGB provides access to the emitter node of the internal output transistor, allowing users to set the low-level output voltage (VOL) by connecting an external resistor to VCC−. Unlike standard open-collector comparators, this isolated-emitter architecture lets designers achieve precise VOL values (e.g., 0.23 V at 8 mA) without additional components - critical for driving TTL or CMOS logic directly while maintaining noise margin and power efficiency in LM111JGB-based interfaces.
Is LM111JGB pin-compatible with other LM311-series comparators?
Yes, LM111JGB shares identical pinout and function with LM211P, LM311P, LM211D, and LM311D in 8-pin packages (CDIP, PDIP, SOIC, TSSOP). All use the same pin numbering: Pin 1 = EMIT OUT, Pin 2 = IN+, Pin 3 = IN−, Pin 4 = VCC−, Pin 5 = BALANCE, Pin 6 = BAL/STRB, Pin 7 = COL OUT, Pin 8 = VCC+. However, LM111JGB's CDIP package and –55°C to +125°C rating differentiate its mechanical and environmental suitability - LM111JGB remains electrically interchangeable where temperature and packaging requirements align.
LM111JGB 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
LM111JGB FAQ
1.How can I place an order for LM111JGB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM111JGB 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 LM111JGB reliable?
The price and inventory of LM111JGB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM111JGB is usually 5 days.
3.What payment methods are accepted for LM111JGB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM111JGB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM111JGB?
LM111JGB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM111JGB 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 LM111JGB?
For technical support, including LM111JGB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM111JGB requirements.
6.How does Aetrix verify that LM111JGB is sourced from the original manufacturer or authorized distributors?
All LM111JGB 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 LM111JGB meets industry standards.
7.What is the process for return or replacement of LM111JGB?
All LM111JGB units undergo pre-shipment inspection (PSI). If there is an issue with LM111JGB, 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 LM111JGB part is unused and in its original packaging.
Return procedure for LM111JGB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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