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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)：2mV @ 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 LM139AD is a quad differential comparator manufactured by Texas Instruments, designed for general-purpose analog signal processing. It features four independent high-gain comparators within a single package, utilizing an open-collector output configuration that allows flexible interfacing with various logic families. The device operates across a wide supply voltage range of 2V to 36V or ±1V to ±18V, ensuring compatibility with diverse power systems. It is housed in a 14-pin SOIC surface-mount package and supports operation from -55°C to +125°C.
Feature Summary
- Integrates four independent high-gain differential comparators for multi-channel signal monitoring
- Features open-collector outputs enabling direct interface with TTL, CMOS, and MOS logic circuits
- Operates over a wide single or dual power supply voltage range for broad system compatibility
Applications
- Temperature sensing and control loops
- Level detection and threshold monitoring
- Peak hold circuits and waveform generation
Procurement Notes
Verify the specific suffix 'AD' against the manufacturer's official datasheet to confirm pinout and electrical characteristics match your design requirements. Ensure the component source provides valid traceability documentation. Confirm RoHS compliance status as per the latest manufacturing notices before finalizing procurement orders.
Selection Notes
Select this component when multiple independent comparison channels are required in a compact surface-mount footprint. The open-collector output simplifies wired-AND configurations and level shifting between different voltage domains. Consider the input offset voltage specifications if precise threshold accuracy is critical for the application.
Part Context
This part belongs to the LM139 family of quad comparators, a widely used standard in analog circuit design. It serves as a foundational building block for converting analog signals into digital states. The device is often utilized in industrial control systems and consumer electronics where reliable voltage comparison is necessary.
Replacement Considerations
LM139A: Offers improved input offset voltage performance compared to the standard LM139 variant.
