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Texas Instruments LM111J-8/883
- Part No.:
- LM111J-8/883
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-CDIP (0.300", 7.62mm)
- Datasheet:
-
LM111J-8/883.pdf
- Description:
- VOLTAGE COMPARATOR 8-CDIP -55 TO
- Quantity:
- Payment:
- Shipping:
Inventory:1,282
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Product details
Overview
LM111J-8/883 from Texas Instruments is a radiation-hardened voltage comparator designed for high-reliability aerospace and defense systems. It delivers 200 nA max input bias current, ±30 V differential input range, 50 mA output sink capability, and operates from single 5V to dual ±15V supplies. Its strobe function, offset null capability, and ground-isolated inputs/outputs support precision threshold detection in satellite power monitoring and missile guidance interfaces.
For engineers reviewing the LM111J-8/883 datasheet, LM111J-8/883 pinout, LM111J-8/883 application, or LM111J-8/883 equivalent, this page provides verified military-grade specifications, TO-99 package details, radiation tolerance data (50 krad(Si) high-dose-rate, 100 krad(Si) low-dose/ELDRS-free), thermal derating guidance, and direct alternatives compliant with MIL-STD-883 Class B screening.
Technical Context
The LM111J-8/883 uses an open-collector NPN output stage capable of switching up to 50V loads referenced to ground, positive supply, or negative supply. Its input stage features ultra-low input currents (≤200 nA over temperature) and balanced PNP differential pairs enabling operation across ±30 V common-mode range without phase reversal.
Strobe functionality is implemented via a dedicated BALANCE/STROBE pin (Pin 6) that disables output when pulled low, while the BALANCE pin (Pin 5) allows external offset trimming using a 10 kΩ potentiometer. The device shares identical pinout with LM106 and LM710 for drop-in replacement in legacy analog comparators.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | 200 nA max over −55°C to +125°C - enables high-impedance sensor interfacing without loading source circuits |
| Differential Input Voltage Range | ±30 V - supports direct comparison of signals referenced to non-ground potentials in power system monitoring |
| Output Sink Current | 50 mA - drives relays, lamps, or TTL/DTL logic directly without external buffers |
| Supply Voltage Range | Single 5V to ±15V - interoperates with both digital logic rails and legacy op-amp supplies |
| Response Time | 400 ns typical at ±15V - sufficient for overvoltage/undervoltage fault detection in regulated DC power systems |
| Offset Voltage | ±3.0 mV max at +25°C - ensures sub-millivolt threshold accuracy in precision reference comparison |
| Operating Temperature | −55°C to +125°C - qualified for extended-range deployment in avionics and spaceborne electronics |
Pinout & Package
LM111J-8/883 is supplied in an 8-lead hermetically sealed TO-99 metal can package (Package Number LMC0008C), with Pin 4 internally connected to case for shielding and thermal conduction. The package is qualified per MIL-STD-883 Method 5005 Group A testing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | NC | No internal connection - left unconnected or grounded for EMI reduction |
| Pin 2 | IN− | Inverting input - accepts reference or feedback signal for threshold comparison |
| Pin 3 | IN+ | Non-inverting input - connects to monitored voltage or sensor output |
| Pin 4 | Case | Internally tied to metal can - must be connected to system ground or shield plane |
| Pin 5 | BALANCE | Offset null terminal - connects to center tap of 10 kΩ trim pot between V+ and V− |
| Pin 6 | BALANCE/STROBE | Gated output enable - pulling low disables output; used for synchronized sampling or multiplexing |
| Pin 7 | OUTPUT | Open-collector NPN collector - requires external pull-up to define logic high level and load voltage |
| Pin 8 | V+ | Positive supply - accepts +5V to +15V in single-supply mode or +15V in dual-supply configuration |
Key Features
| Feature | Design Value |
|---|---|
| Radiation Hardness | Qualified to 50 krad(Si) high-dose-rate and 100 krad(Si) low-dose/ELDRS-free per MIL-STD-883 Method 1019 - suitable for LEO/MEO satellite bus monitoring |
| Supply Flexibility | Operates from single 5V (TTL-compatible) to ±15V (legacy op-amp rail) - eliminates need for level-shifting in mixed-signal systems |
| Output Isolation | Output can drive loads referenced to ground, V+, or V− - enables floating load control in isolated DC-DC converter feedback paths |
| Strobe Control | Dedicated BALANCE/STROBE pin allows synchronous blanking of output during ADC sampling windows - prevents false triggering in time-critical measurement systems |
| Pin Compatibility | Identical pinout to LM106 and LM710 - permits field upgrade of aging comparator circuits without PCB redesign |
Applications
| Satellite Power Bus Monitoring | Missile Guidance Signal Conditioning |
|---|---|
Use Scenario: Real-time detection of overvoltage/undervoltage events on 28V spacecraft bus feeding critical avionics subsystems. IC Role / Device Role / Timing Role: Precision comparator comparing bus voltage against trimmed reference to assert fault flag within 400 ns. Use Value: Enables immediate shutdown or reconfiguration before downstream damage occurs, leveraging ±30 V input range to monitor unregulated bus transients. | Use Scenario: Threshold detection of gyro or accelerometer analog outputs to trigger attitude correction pulses in inertial navigation units. IC Role / Device Role / Timing Role: High-speed comparator converting analog sensor deviation into digital command pulses with strobe-synchronized timing. Use Value: Strobe pin allows precise alignment with inertial measurement cycle, eliminating jitter-induced false triggers in closed-loop guidance. |
| Avionics Engine Control Interface | Nuclear Facility Sensor Interfacing |
Use Scenario: Monitoring turbine exhaust gas temperature (EGT) sensor outputs against safety thresholds in FADEC systems. IC Role / Device Role / Timing Role: Radiation-tolerant comparator interfacing thermocouple-amplified signals to digital controller I/O with galvanic isolation. Use Value: Ground-isolated inputs/outputs permit direct connection to isolated sensor front-ends without additional optocouplers or level shifters. | Use Scenario: Detecting ionization chamber current thresholds in reactor coolant monitoring systems exposed to neutron/gamma flux. IC Role / Device Role / Timing Role: Low-bias-current comparator amplifying picoamp-level chamber currents while rejecting radiation-induced leakage. Use Value: 200 nA max input bias ensures minimal error contribution in ultra-low-current sensing, validated to 100 krad(Si) ELDRS-free performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM111H/883 | Same electrical specs but in 8-lead CDIP package (NAB008A); higher θJA (134°C/W vs 162°C/W) | Lacks metal-can EMI shielding; preferred where board-level shielding is already implemented | Select when TO-99 mechanical mounting or RF immunity is not required and PCB real estate favors DIP footprint |
| LM111W/883 | 14-lead CDIP package (NAD0010A); includes separate V− and GND pins for improved noise rejection | Supports independent ground routing for sensitive analog sections; no case connection | Choose for new designs requiring enhanced PSRR and reduced ground bounce in multi-rail systems |
Compared with LM111H/883 and LM111W/883, the LM111J-8/883 offers superior EMI immunity and thermal conduction via its TO-99 metal can, making it optimal for compact, high-density avionics modules where radiated susceptibility and junction temperature management are critical.
Availability
LM111J-8/883 is available at Aetrix Electronics and suitable for satellite power regulation, missile guidance signal conditioning, and nuclear facility sensor interfacing requiring stable component supply across extended temperature and radiation environments.
Supply support for LM111J-8/883 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 deep heritage in high-reliability aerospace and defense components.
The LM111 family was engineered for mission-critical analog threshold detection in radiation-exposed environments, targeting satellite bus protection, weapons system guidance, and nuclear instrumentation where failure is not an option.
FAQ
What is the maximum allowable power dissipation for LM111J-8/883 at +125°C ambient?
The LM111J-8/883 has a maximum power dissipation of 330 mW at +25°C ambient in the TO-99 package. At +125°C, derating applies: using θJA = 162°C/W, the allowable power drops to approximately 170 mW ((175°C − 125°C) ÷ 162°C/W). This value assumes proper heatsinking via Pin 4 (case) connection and must be verified against actual board layout thermal performance. LM111J-8/883 thermal design must account for worst-case supply voltage and output loading conditions.
Does LM111J-8/883 support single-supply operation with TTL logic interfacing?
Yes, LM111J-8/883 operates from a single +5V supply and its open-collector output is fully compatible with TTL, DTL, and RTL logic families. When used with +5V supply, a pull-up resistor to +5V establishes a logic-high level of ~4.5V, meeting TTL VOH minimum requirements. The device maintains full specification compliance-including 200 nA input bias current and ±3.0 mV offset-under single-supply conditions. LM111J-8/883 is explicitly characterized for 5V-only operation in its datasheet.
How is the strobe function implemented on LM111J-8/883, and what voltage levels disable the output?
The strobe function is controlled by the BALANCE/STROBE pin (Pin 6). Pulling this pin to a voltage ≤0.7V below V− (typically ground in single-supply mode) disables the output transistor, forcing the OUTPUT pin (Pin 7) into high-impedance state regardless of input differential voltage. In dual-supply operation, strobe activation requires Pin 6 ≤ V− + 0.7V. The maximum strobe sink current is 10 mA. LM111J-8/883 strobe timing adds <50 ns propagation delay to output disable/enable transitions.
What radiation test standards does LM111J-8/883 meet, and are post-irradiation parameters guaranteed?
LM111J-8/883 is tested per MIL-STD-883 Method 1019 Condition A for total ionizing dose (TID), achieving 50 krad(Si) high-dose-rate and 100 krad(Si) low-dose/ELDRS-free qualification. Post-irradiation limits for VIO, IIO, and ICEX are guaranteed per SMD 5962R0052402 specifications. Delta parameter shifts (e.g., ΔVIO ≤ ±0.5 mV) are verified at Group B, Subgroup 5. LM111J-8/883 radiation data is documented in TI's SNOSAJ4C datasheet revision March 2013.
Can LM111J-8/883 drive a 24V relay coil directly, and what series resistance is recommended?
Yes, LM111J-8/883 can directly drive a 24V relay coil via its open-collector output (Pin 7), provided the coil current is ≤50 mA. For a typical 24V/40 mA relay, connect the coil between +24V and Pin 7, with no series resistor needed. If coil inductance causes voltage spikes exceeding 50V, add a flyback diode (e.g., 1N4007) across the coil. Ensure V+ supply is ≥24V and verify power dissipation: at 40 mA and 1.5V saturation, LM111J-8/883 dissipates 60 mW - within its 330 mW TO-99 rating. LM111J-8/883 output stage is rated for 50V load switching.
LM111J-8/883 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-CDIP (0.300", 7.62mm)
- Series:
- LM111
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- Open-Collector
- Voltage - Supply, Single/Dual (±):
- 5V ~ 30V, ±2.5V ~ 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):
- 200ns (Typ)
- Propagation Delay (Max):
- -
- Hysteresis:
- -55°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Through Hole
- :
- 8-CDIP
LM111J-8/883 FAQ
1.How can I place an order for LM111J-8/883 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM111J-8/883 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 LM111J-8/883 reliable?
The price and inventory of LM111J-8/883 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM111J-8/883 is usually 5 days.
3.What payment methods are accepted for LM111J-8/883?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM111J-8/883 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM111J-8/883?
LM111J-8/883 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM111J-8/883 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 LM111J-8/883?
For technical support, including LM111J-8/883 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM111J-8/883 requirements.
6.How does Aetrix verify that LM111J-8/883 is sourced from the original manufacturer or authorized distributors?
All LM111J-8/883 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 LM111J-8/883 meets industry standards.
7.What is the process for return or replacement of LM111J-8/883?
All LM111J-8/883 units undergo pre-shipment inspection (PSI). If there is an issue with LM111J-8/883, 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 LM111J-8/883 part is unused and in its original packaging.
Return procedure for LM111J-8/883:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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