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Product Detailed Parameters
- Description：QUAD DIFFERENTIAL COMPARATOR 20-
- Series：-
- Mfr：Texas Instruments
- Package：Tube
- Type：General Purpose
- Number of Elements：4
- Output Type：Open-Collector, Open-Drain
- Voltage - Supply, Single/Dual (±)：2V ~ 30V, ±1V ~ 15V
- Voltage - Input Offset (Max)：5mV @ 5V
- Current - Input Bias (Max)：0.1µA @ 5V
- Current - Output (Typ)：16mA @ 5V
- Current - Quiescent (Max)：2mA
- CMRR, PSRR (Typ)：-
- Propagation Delay (Max)：300ns (Typ)
- Hysteresis：-
- Operating Temperature：-55°C ~ 125°C
- Package / Case：20-CLCC
- Mounting Type：Surface Mount
- Supplier Device Package：20-LCCC (8.89x8.89)
- Grade：-
- Qualification：-
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Overview
The LM139FKB is a quad differential comparator from the LM139-MIL series, designed for military-grade reliability. It operates on single supplies of 2 V to 36 V or dual supplies of ±1 V to ±18 V. Key electrical characteristics include a typical supply current of 0.8 mA, input bias current of 25 nA, and input offset voltage of 2 mV at 25°C. The device features open-collector outputs compatible with TTL, MOS, and CMOS logic. It is characterized for operation over the full military temperature range of –55°C to +125°C.
Feature Summary
- Wide supply voltage capability supporting both single and dual power configurations
- Low power consumption with supply current independent of voltage levels
- Open-collector output architecture enabling wired-AND logic connections
- Military-grade construction ensuring performance across extreme temperature ranges
Applications
- Industrial control systems
- Automotive infotainment and cluster interfaces
- Power supervision circuits
- Oscillator designs
- Logic voltage translation
Procurement Notes
Verify that the specific orderable part number matches the required package type and military qualification standards. Confirm RoHS compliance status and lead finish specifications against project requirements. Ensure the supplier provides documentation verifying the component meets MIL-PRF-38535 parameters if such certification is mandated for the application.
Selection Notes
Select this component when high voltage tolerance and wide operating temperature ranges are critical. The open-collector output requires an external pull-up resistor to define the high logic level. Consider the thermal resistance values for the LCCC package when designing heat dissipation strategies for enclosed environments.
Part Context
This device belongs to the LM139-MIL family, which includes variants in CDIP, CFP, and SOIC packages. The FK designation specifically identifies the 20-pin Leadless Ceramic Chip Carrier (LCCC) package. This family shares core comparator functionality but differs in physical footprint and mounting style.
Replacement Considerations
LM139FK
