LM339PW - 4-Channel 36V Open-Collector Comparator | Texas Instruments
料号： LM339PW ✓ 量产中LM339PW 概述
A differential comparator is an analog-to-digital decision component that compares two voltage inputs and changes its output when one input crosses the other. A quad comparator such as the LM339PW integrates four independent channels, making it part of the comparator IC hierarchy and the broader interface IC and semiconductor categories. Its open-collector outputs require an external pull-up resistor, allowing the output voltage, rise time, and interface standard to be selected by the system designer.
The verified LM339 family information highlights a maximum rating of up to 38 V, an HBM ESD rating of 2 kV, a low input offset of 0.37 mV, a low input bias current of 3.5 nA, and a typical supply current of 200 µA per comparator. A response time of 1 µs is also listed for the family. These characteristics make the device useful for level detection, threshold comparison, open-collector bus signaling, and industrial control functions where input signals can approach ground.
Each of the four channels is independent, so the device can perform unrelated comparisons without coupling the logic states of different channels. The open-collector architecture can sink output current while the external pull-up establishes the high state, which is useful for wired logic, relay-driver interfaces, and legacy TTL, MOS, or CMOS-compatible systems. Because output rise time depends on the pull-up resistance and total node capacitance, timing analysis must include the external network rather than relying only on the comparator response time.
Typical applications include industrial sensor-threshold monitoring, battery and power-supply protection, overvoltage detection, window comparators, and four-channel level translation. The ground-referenced common-mode capability is particularly useful for detecting the presence or absence of a signal from a 12 V or 24 V industrial sensor. A pull-up can also connect the open-collector outputs to an appropriate supply, allowing multiple comparators to form a wired signal function where the application and device specifications permit it.
When designing the PCB, place the pull-up resistor close to the open-collector output and route the node away from high-current switching paths. Decoupling capacitors should connect the supply and ground pins with a short return path. Because the package has no exposed thermal pad and the device can operate across a wide voltage range, engineers should verify the maximum differential input voltage, output current, and dissipation conditions against the manufacturer datasheet.
This page consolidates verified distributor and manufacturer information with package guidance, application analysis, commercial questions, and drop-in replacement details. It is intended to support faster component selection while clearly identifying specification fields, pricing, and pin-level details that still require confirmation from the appropriate manufacturer documentation.
直接替换替代料： LM339PW ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： LM339PW （相同外形与封装尺寸） ——差异在于 Comparator Type, Number of Channels, Output Type, Package, Propagation Delay.
LM239PWR
✅ 直接替换📋 参考替代料（不在目录中）
LM2901PWR
✅ 直接替换📋 参考替代料（不在目录中）
LM2901PT
✅ 直接替换📋 参考替代料（不在目录中）
LM339PWR
✅ 直接替换📋 参考替代料（不在目录中）
LM339PW 最大额定值与电气特性
| Comparator Type | Quad differential comparator |
| Number of Channels | 4 channels |
| 输出类型 | Open-collector |
| Supply Voltage Range | 2 V to 36 V |
| Maximum Family Rating | Up to 38 V |
| Propagation Delay | 300 ns |
| Family Response Time | 1 µs |
| Low Input Offset | 0.37 mV |
| Low Input Bias Current | 3.5 nA |
| Supply Current per Comparator | 200 µA typical |
| Common-Mode Input Range | Includes ground |
| Differential Input Voltage | Equal to maximum-rated supply voltage, up to ±38 V |
| ESD Rating HBM | 2 kV |
| Output Compatibility | Compatible with TTL, MOS, and CMOS |
| 封装 | 14-pin TSSOP |
| 安装类型 | Surface mount |
LM339PW 14-pin tssop 引脚配置指南
LM339PW（14-pin tssop 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： LM339PW.
请参阅 数据手册 以查看完整引脚配置。
典型应用
LM339PW 适用于 6 应用s: Industrial Sensor Threshold Detection, Power-Supply Overvoltage Protection, Battery Low-Level Detection, Window and Range Comparator, Open-Collector Interface and Level Translation, Motor and Actuator Limit Detection.
Industrial Sensor Threshold Detection
The LM339PW fits industrial sensor-threshold detection because its four independent channels operate from a verified 2 V to 36 V supply, and the common-mode input range includes ground. Each comparator can evaluate a sensor signal against a reference and use its open-collector output to signal a controller. A pull-up resistor establishes the digital high level, while the specified 300 ns propagation delay supports prompt threshold decisions. For a 12 V or 24 V sensor interface, designers should confirm the exact input, supply, and transient limits in the manufacturer datasheet.
推荐
Power-Supply Overvoltage Protection
The LM339PW can supervise a power rail by comparing a divided feedback voltage with a reference and asserting an open-collector fault signal when the monitored voltage exceeds a threshold. Its 2 V to 36 V operating range accommodates many 5 V, 12 V, and 24 V systems, and its ground-inclusive common-mode range simplifies low-side threshold sensing. The 300 ns specified response helps limit fault propagation, although the final protection delay also includes the external divider, filters, pull-up network, and downstream logic delay.
推荐
Battery Low-Level Detection
The LM339PW is appropriate for battery-level detection because a comparator channel can compare a divided battery voltage with a reference while remaining powered from a 2 V to 36 V source. The ground-inclusive common-mode range allows low battery voltages to be sensed without a negative supply. The open-collector output can drive a pull-up and an MCU input or indicator, while the low 200 µA-per-comparator typical supply current helps limit standby overhead. Battery chemistry, tolerance stack-up, and the minimum operating voltage should be verified before release.
推荐
Window and Range Comparator
Two LM339PW channels can implement a window comparator by comparing the monitored signal against upper and lower references. The fourth channel remains available for another independent decision, reducing the need for multiple comparator packages. With a 300 ns propagation delay and open-collector outputs, the device can report whether a voltage lies inside or outside a permitted range. The reference tolerance and resistor-network error determine the practical window accuracy, so production designs should include those errors rather than relying on the comparator offset alone.
推荐
Open-Collector Interface and Level Translation
The LM339PW can translate a legacy or industrial logic signal through an externally pulled-up open-collector output. Because the pull-up sets the high-state voltage, the output can be referenced to a supply compatible with TTL, MOS, or CMOS receivers. The ground-inclusive input range supports sensing signals near zero volts, and the 300 ns propagation delay is suitable for ordinary digital control and alarm signals. System timing must include the RC rise time formed by the pull-up and wiring capacitance, especially on longer or slower nodes.
推荐
Motor and Actuator Limit Detection
The LM339PW can monitor a motor, actuator, or solenoid control signal and identify an out-of-range condition before it reaches a hazardous state. Four independent channels allow several limit inputs to be evaluated by one package, and the open-collector fault output can be pulled up to the logic supply used by a controller. Its 2 V to 36 V supply range supports common industrial rails, but motor environments require separate analysis of inductive kickback, surge, ground bounce, and isolation. The comparator should not replace the protection components required by the motor driver.
推荐
推荐产品汇总
工程参考数据： LM339PW ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | LM239PWR | LM2901PWR | LM2901PT | LM339PWR | LM339PT |
|---|---|---|---|---|---|---|
| Package | 14-TSSOP | 14-TSSOP - same footprint | 14-TSSOP - same footprint | 14-TSSOP - same footprint | 14-TSSOP - same footprint | 14-TSSOP - same footprint |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | ROHM Semiconductor | ROHM Semiconductor |
| Comparator Channels | 4 channels | 4 channels | 4 channels | 4 channels | 4 channels | 4 channels |
| Output Type | Open-collector | Open-collector | Open-collector | Open-collector | Open-collector | Open-collector |
| Open-Collector Pull-Up Requirement | External pull-up required | External pull-up required | External pull-up required | External pull-up required | External pull-up required | External pull-up required |
关键差异点
- Faster verified response than the ROHM LM339 alternatives （对比 ROHM Semiconductor LM339PWR)
- Lower verified family offset than the listed ROHM alternatives （对比 ROHM Semiconductor LM339PT)
- Single-source continuity with directly related TI grades （对比 LM239PWR)
设计说明
Do not treat the 2 V to 36 V operating range as an absolute-maximum rating. The verified manufacturer information states that family versions can reach a maximum rating of up to 38 V and permits differential input voltages up to the maximum-rated supply voltage. Confirm the exact LM339PW limits, especially during supply transients, before selecting resistor values or relying on an input beyond the normal operating range.
Place the pull-up resistor close to the relevant open-collector output and keep the output trace away from inductors, motor nodes, and switching converter power paths. The resistor and trace capacitance determine the output rise time, so calculate the RC behavior for the longest supported trace. A separate ground return and short supply-decoupling connection help prevent comparator output transitions from coupling noise into sensitive input nodes.
Account for input filtering and hysteresis when using the four channels as threshold detectors. Comparator input offset, reference tolerance, resistor tolerance, and noise determine the effective switching threshold. Adding positive feedback creates hysteresis and prevents repeated output toggling, while input RC networks should be sized so their transient response remains faster than the verified 300 ns propagation-delay requirement of the LM339PW.
合规信息
The supplied verified data does not provide suffix-specific RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements. These fields remain unknown rather than being inferred.
