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Product Detailed Parameters
- Description：LOW POWER LOW OFFSET VOLTAGE QUA
- Series：-
- Mfr：Texas Instruments
- Package：Tube
- Type：General Purpose
- Number of Elements：4
- Output Type：Open-Collector, Open-Drain
- Voltage - Supply, Single/Dual (±)：5V ~ 30V, ±2.5V ~ 15V
- Voltage - Input Offset (Max)：5mV @ 30V
- Current - Input Bias (Max)：1000pA @ 5V
- Current - Output (Typ)：-
- Current - Quiescent (Max)：3mA
- CMRR, PSRR (Typ)：-
- Propagation Delay (Max)：700ns (Typ)
- Hysteresis：10mV
- Operating Temperature：-55°C ~ 125°C
- Package / Case：Die
- Mounting Type：Surface Mount
- Supplier Device Package：Die
- Grade：-
- Qualification：-
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Overview
The LM139MDR is a quad differential comparator manufactured by Texas Instruments, housed in a 14-SOIC surface-mount package. It operates on a single or dual power supply ranging from 2 V to 36 V. The device features four independent channels with open-collector outputs capable of sinking up to 6 mA. Key electrical specifications include a maximum input offset voltage of 5 mV and an input bias current of 25 nA. The unit draws 500 uA of operating current and exhibits a response time of 300 ns. It functions reliably within a temperature range of -55 C to +125 C.
Feature Summary
- Integrates four independent high-gain differential comparators into a single compact package for space-constrained designs.
- Features open-collector outputs that allow flexible interfacing with various logic families through external pull-up resistors.
- Supports wide single-supply or split-rail voltage operation, enabling compatibility with diverse system power architectures.
Applications
- Battery-powered systems requiring low quiescent current consumption
- Temperature sensing circuits utilizing thermistor bridges
- Over-voltage and under-voltage protection monitoring
Procurement Notes
Verify the specific suffix 'MDR' against the official Texas Instruments datasheet to confirm it denotes the SOIC-14 package with tape-and-reel packaging. Ensure the component matches the required industrial temperature grade and pinout configuration before integration. Cross-reference ordering information with authorized distributors to avoid counterfeit parts.
Selection Notes
Select this component when multiple independent comparison functions are needed in a small footprint. It is suitable for applications demanding low power consumption and wide supply voltage flexibility. Consider the open-collector output limitation when designing interface circuits to ensure proper logic level translation.
Part Context
The LM139 series belongs to Texas Instruments' family of low-power quad differential comparators. It serves as a general-purpose analog comparator solution widely used in industrial and consumer electronics. The device offers a balance of performance and cost-effectiveness for basic signal conditioning tasks.
Replacement Considerations
LM139DR is a verified substitute part number offering identical functionality and pinout compatibility within the same product family.
