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Product Detailed Parameters
- Description：IC COMPARATOR 1 GEN PUR SOT23-5
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：General Purpose
- Number of Elements：1
- Output Type：Open-Collector, Rail-to-Rail
- Voltage - Supply, Single/Dual (±)：5V ~ 30V, ±2.5V ~ 15V
- Voltage - Input Offset (Max)：7mV @ 30V
- Current - Input Bias (Max)：0.25µA @ 5V
- Current - Output (Typ)：13mA @ 5V
- Current - Quiescent (Max)：2mA
- CMRR, PSRR (Typ)：-
- Propagation Delay (Max)：-
- Hysteresis：-
- Operating Temperature：-40°C ~ 85°C
- Package / Case：SC-74A, SOT-753
- Mounting Type：Surface Mount
- Supplier Device Package：SOT-23-5
- Grade：-
- Qualification：-
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Overview
The LM397MFX/NOPB is a single general-purpose voltage comparator manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 40 V and supports both single and dual supply configurations. The device features rail-to-rail input capability, allowing operation with common-mode voltages extending to the negative supply rail. It includes an open-collector output stage suitable for interfacing with various logic families. The component is housed in a compact SOT-23-5 surface-mount package and is rated for operation across an extended industrial temperature range from -40°C to +125°C.
Feature Summary
- Single general-purpose voltage comparator architecture
- Wide operating supply voltage range supporting 2 V to 40 V
- Rail-to-rail input capability for full common-mode range
- Open-collector output stage for flexible logic interfacing
Applications
- Window detectors
- Power supply monitoring
- Threshold detection circuits
Procurement Notes
Verify the specific suffix 'NOPB' confirms lead-free compliance and RoHS adherence as per Texas Instruments documentation. Confirm the SOT-23-5 package outline matches the target PCB footprint design. Ensure the open-collector output configuration aligns with the pull-up requirements of the downstream circuitry. Validate that the 40 V maximum supply rating exceeds the application's peak voltage conditions.
Selection Notes
Select this component when a wide supply voltage range up to 40 V is required in a small SOT-23-5 package. It is suitable for applications needing rail-to-rail input performance without requiring external level shifting. Consider the open-collector output nature when designing the pull-up network. Compare against other comparators if higher speed or push-pull outputs are necessary.
Part Context
The LM397 series represents a legacy line of general-purpose comparators originally developed by National Semiconductor before its acquisition by Texas Instruments. The LM397MFX/NOPB variant continues this lineage, offering robust performance in cost-sensitive applications. It serves as a drop-in replacement for older LM397 designs while meeting modern environmental standards through the NOPB designation.
Replacement Considerations
- LM397MFX
