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Product Detailed Parameters
- Description：IC COMPARATOR 4 DIFF 14SOIC
- 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 @ 30V
- Current - Input Bias (Max)：0.1µA @ 5V
- Current - Output (Typ)：20mA
- Current - Quiescent (Max)：2mA
- CMRR, PSRR (Typ)：-
- Propagation Delay (Max)：-
- Hysteresis：-
- Operating Temperature：-55°C ~ 125°C
- Package / Case：14-SOIC (0.154", 3.90mm Width)
- Mounting Type：Surface Mount
- Supplier Device Package：14-SOIC
- Grade：-
- Qualification：-
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Overview
The LM139D is a quad differential voltage comparator manufactured by Texas Instruments, designed for operation from a single power supply. It features four independent channels housed in a 14-SOIC surface-mount package. The device supports a supply voltage range of 2V to 30V and operates within a temperature range of -55°C to 125°C. Key electrical specifications include a typical response time of 1.3 microseconds, an input bias current of 0.1µA at 5V, and a maximum output current of 20mA. The output configuration is open collector/open drain.
Feature Summary
- Quad differential voltage comparator architecture
- Open collector and open drain output capability
- Wide single-supply voltage operational range
- Extended industrial temperature performance
Applications
- Voltage monitoring systems
- Threshold detection circuits
- Logic interface drivers
- Over-voltage protection circuits
Procurement Notes
Verify the specific manufacturer designation on the component marking, as the LM139 series has been produced by multiple vendors including National Semiconductor and Texas Instruments. Confirm that the device matches the required pinout and electrical characteristics for your design, particularly regarding the open-collector output requirements and pull-up resistor configurations.
Selection Notes
Select this component when a quad comparator with wide supply voltage tolerance is required. Ensure the application can accommodate the open-collector output structure, which necessitates external pull-up resistors. Verify that the 1.3 microsecond propagation delay meets the timing constraints of the target circuit compared to faster comparator alternatives.
Part Context
The LM139D belongs to the LMx39 family of quad comparators, which are industry-standard devices for general-purpose voltage comparison. This specific part number denotes the SOIC-14 surface-mount variant. While originally associated with National Semiconductor, Texas Instruments now manufactures and distributes this component following their acquisition activities.
Replacement Considerations
- LM139DR
- LM139AD
- LM139ID
