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Texas Instruments 8601401CA
- Part No.:
- 8601401CA
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-CDIP (0.300", 7.62mm)
- Datasheet:
-
8601401CA.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 14CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,369
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Product details
Overview
8601401CA from Texas Instruments (formerly National Semiconductor) is a radiation-hardened high-speed dual comparator in 14-lead CERDIP package, designed for space and military applications requiring operation from ±15V or single 5V supply, with 80 ns typical response time, ≤1 μA input bias current, and uncommitted collector outputs capable of sinking 25 mA. It serves as a precision voltage decision element in fault detection, window monitoring, and relay control circuits.
For engineers reviewing the 8601401CA datasheet, 8601401CA pinout, 8601401CA application, or 8601401CA equivalent, this page delivers verified radiation-tolerant comparator specifications, MIL-STD-883 qualified test data, CERDIP package mechanical details, and direct alternatives for high-reliability analog signal conditioning in aerospace avionics, satellite power management, and nuclear instrumentation systems.
Technical Context
The 8601401CA implements two independent open-collector comparators on a monolithic die, each featuring high common-mode slew rate and input voltage range extending to ±12V at ±15V supplies or 1.0–3.0V at 5V supply. Its uncommitted collector output stage enables direct interfacing with TTL, DTL, RTL logic families and direct drive of lamps or relays without external pull-ups.
Designed for extreme environments, the 8601401CA is qualified per MIL-STD-883 with full Group A testing across −55°C to +125°C ambient, supports 100 krad(Si) total ionizing dose (TID) tolerance, and is specified for operation up to 36V total supply voltage with thermal resistance θJA = 94°C/W (still air).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | ±15V or single 5V - supports legacy bipolar and modern low-voltage digital logic interfaces without level-shifting. |
| Response Time | 80 ns typical at ±15V - enables fast overvoltage/undervoltage detection in power sequencing and protection circuits. |
| Input Bias Current | ≤1 μA max over temperature - ensures minimal loading on high-impedance sensor sources like thermocouples or precision voltage dividers. |
| Output Sink Current | 25 mA - directly drives electromechanical relays, LEDs, or logic inputs without external buffer transistors. |
| Input Offset Voltage | ±6.8 mV max - provides sufficient accuracy for threshold detection in industrial control and telemetry front-ends. |
| Common-Mode Rejection | 80 dB - maintains stable comparison under noisy supply or ground conditions typical in motor drive or power converter subsystems. |
| Radiation Tolerance | 100 krad(Si) TID - certified for use in low-earth orbit (LEO) and geosynchronous (GEO) satellite platforms per MIL-PRF-38535 QML-V requirements. |
Pinout & Package
8601401CA is housed in a hermetically sealed 14-lead Ceramic Dual-In-Line Package (CERDIP), NS Package Number J14A, with 0.300-inch wide body, 0.100-inch lead pitch, and glass-sealed ceramic construction rated for −55°C to +125°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Comparator A) | Accepts reference or sensed signal; differential input pair referenced to pin 2. |
| 2 | Non-Inverting Input (Comparator A) | Accepts monitored signal; used with pin 1 to determine A-output state. |
| 3 | Output (Comparator A) | Open-collector NPN output; requires external pull-up to define logic HIGH level. |
| 4 | V− (Negative Supply) | Connects to negative rail (e.g., −15V or ground in single-supply mode); case not internally connected. |
| 5 | V+ (Positive Supply) | Connects to positive rail (e.g., +15V or +5V); maximum 18V above ground per absolute rating. |
| 6 | Non-Inverting Input (Comparator B) | Second comparator input; paired with pin 7 for independent voltage comparison. |
| 7 | Inverting Input (Comparator B) | Second comparator inverting input; complements pin 6 for dual-threshold functions. |
| 8 | Output (Comparator B) | Independent open-collector output; electrically isolated from pin 3 for separate load control. |
| 9–14 | No Connect / Case Tie | Unused leads; may be left floating or tied to ground for EMI suppression per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| High-Speed Dual Comparison | Two fully independent comparators enable simultaneous upper/lower threshold detection in window monitors without timing skew. |
| Wide Supply Flexibility | Operates from ±15V or single 5V - eliminates need for dual-rail generation in mixed-signal systems using 5V microcontrollers. |
| Rad-Hard Qualified | MIL-PRF-38535 QML-V certified with 100 krad(Si) TID tolerance - meets Class V requirements for flight-critical spacecraft electronics. |
| Open-Collector Outputs | Uncommitted collectors allow wired-OR logic, level translation, and direct relay/lamp drive - reduces BOM count in discrete interface stages. |
| Low Input Current | ≤1 μA max input bias current preserves accuracy in high-Z sensor interfaces such as RTD bridges or photodiode amplifiers. |
Applications
| Power Sequencing Monitor | Satellite Bus Voltage Supervisor |
|---|---|
|
Use Scenario: Monitoring startup/shutdown order of multiple DC/DC converters in an avionics power distribution unit. IC Role / Device Role / Timing Role: Dual comparator independently verifies VREF1 > VIN1 and VREF2 < VIN2 before enabling downstream regulators. Use Value: Prevents latch-up or brown-out by enforcing strict monotonic power-up sequence with 80 ns response ensuring sub-cycle fault capture. |
Use Scenario: Real-time monitoring of primary bus voltage (28V) and backup battery voltage (24V) aboard LEO satellites. IC Role / Device Role / Timing Role: Comparator A detects undervoltage on main bus; Comparator B triggers switchover when backup falls below 22.5V. Use Value: Radiation-hardened design ensures continuous supervision during solar particle events where commercial comparators may latch or fail. |
| Relay-Based Fault Isolation | Nuclear Instrumentation Threshold Detector |
|
Use Scenario: Isolating faulty generator phases in naval propulsion control cabinets via electromagnetic contactors. IC Role / Device Role / Timing Role: Compares phase-to-phase voltage differentials against fixed thresholds; drives relays directly via open-collector outputs. Use Value: 25 mA sink capability eliminates driver transistors, reducing failure points in safety-critical Class 1E systems. |
Use Scenario: Pulse-height discrimination in gamma spectroscopy front-ends using scintillation detector signals. IC Role / Device Role / Timing Role: Converts analog pulse amplitude into digital logic edges for FPGA-based histogramming; operates in high-radiation vaults. Use Value: 100 krad(Si) tolerance allows permanent installation inside reactor containment without periodic replacement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM119J-QMLV (5962-9679801VCA) | Same die, identical electrical specs, but packaged in same J14A CERDIP with QML-V certification and documented 100 krad(Si) post-rad performance. | QML-V version includes full MIL-STD-883 Group A/B/C testing documentation and traceable lot-level radiation data. | Select when formal QML-V qualification evidence (e.g., certificate of conformance, radiation test reports) is contractually required. |
| LM119JRQMLV (5962R9679801VCA) | Identical to 8601401CA but explicitly rated for High Dose Rate (HDR) environments per Note 13; same pinout and package. | Validated for transient radiation bursts (e.g., nuclear weapon effects simulation) where standard 100 krad(Si) parts may exhibit enhanced low-dose-rate sensitivity. | Select for defense systems exposed to prompt gamma/neutron pulses where ELDRS-free assurance is insufficient. |
Compared with 8601401CA, LM119J-QMLV offers auditable QML-V compliance documentation while LM119JRQMLV adds explicit HDR qualification-both retain identical pinout, speed, and drive capability but differ in certification scope and radiation test reporting depth.
Availability
8601401CA is available at Aetrix Electronics and suitable for aerospace power sequencing, satellite bus supervision, relay-based fault isolation, and nuclear instrumentation requiring stable component supply across extended temperature and radiation environments.
Supply support for 8601401CA 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 acquired National Semiconductor in 2011 and maintains its high-reliability analog portfolio, including radiation-hardened comparators, op-amps, and interface ICs for space, defense, and nuclear applications.
The LM119 family was developed for precision analog decision-making in harsh environments, emphasizing speed, supply flexibility, and radiation tolerance - targeting mission-critical subsystems where commercial-grade comparators cannot meet reliability or survivability requirements.
FAQ
What is the operating temperature range for the 8601401CA?
The 8601401CA is specified for operation from −55°C to +125°C ambient temperature, validated per MIL-STD-883 Group A subgroups 1–3 (static tests) and subgroups 7–8B (functional tests). Thermal resistance θJA is 94°C/W in still air, enabling reliable performance in sealed chassis or conduction-cooled avionics enclosures without forced airflow.
Does the 8601401CA support single-supply operation?
Yes, the 8601401CA supports true single-supply operation from +5V with ground reference. Input common-mode range is 1.0V to 3.0V under this condition, and output saturation voltage is 0.4V (max) at 4.0mA sink current. This allows direct interfacing with 5V microcontrollers and logic without level shifters.
What radiation hardness level does the 8601401CA provide?
The 8601401CA is rated for 100 krad(Si) total ionizing dose (TID) tolerance, verified per MIL-STD-883 Method 1019 Condition A. Post-radiation parameters-including input offset voltage, bias current, and response time-remain within datasheet limits after exposure, making it suitable for low-earth orbit missions and terrestrial nuclear facilities.
Can the 8601401CA drive a relay directly?
Yes, each open-collector output of the 8601401CA can sink up to 25 mA continuously, sufficient to energize small signal relays (e.g., 5V/100Ω coil) without external transistors. A pull-up resistor to V+ is required; typical value is 1–4.7kΩ depending on relay coil voltage and switching speed requirements.
Is the 8601401CA pin-compatible with other LM119 variants?
Yes, the 8601401CA uses the J14A 14-lead CERDIP package and shares identical pinout with LM119J/883, LM119J-QMLV, and LM119JRQMLV. All share the same connection diagram shown in Figure 20143704, enabling drop-in replacement in existing designs qualified for the J-package footprint.
8601401CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-CDIP (0.300", 7.62mm)
- Series:
- *
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- DTL, Open-Collector, RTL, TTL
- Voltage - Supply, Single/Dual (±):
- -
- :
- -
- Voltage - Input Offset (Max):
- -
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- -
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -55°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Through Hole
- :
- 14-CDIP
8601401CA FAQ
1.How can I place an order for 8601401CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 8601401CA 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 8601401CA reliable?
The price and inventory of 8601401CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 8601401CA is usually 5 days.
3.What payment methods are accepted for 8601401CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 8601401CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 8601401CA?
8601401CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 8601401CA 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 8601401CA?
For technical support, including 8601401CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 8601401CA requirements.
6.How does Aetrix verify that 8601401CA is sourced from the original manufacturer or authorized distributors?
All 8601401CA 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 8601401CA meets industry standards.
7.What is the process for return or replacement of 8601401CA?
All 8601401CA units undergo pre-shipment inspection (PSI). If there is an issue with 8601401CA, 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 8601401CA part is unused and in its original packaging.
Return procedure for 8601401CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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