LM339M - Quad Open-Collector Comparator | Texas Instruments
料号： LM339M ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
LM339M 概述
A comparator is an analog integrated circuit that compares two input voltages and produces a digital logic state indicating which input is higher. The LM339 belongs to the broader hierarchy of analog comparator ICs, voltage-detection devices, and general-purpose signal-conditioning components. Its four independent channels allow one package to implement multiple threshold, overvoltage, undervoltage, window, or sorting decisions while sharing a common supply architecture.
Key features include four open-collector outputs, low supply current, low input bias current, low-offset operation, and an input common-mode range that includes ground on single-supply systems. Open-collector outputs require an external pull-up resistor and can support wired logic, connector interfaces, level translation, or multiple devices sharing a bus when the electrical conditions are appropriate. Unlike a push-pull output, this architecture provides useful flexibility at the cost of requiring an external pull-up and having a slower rising edge.
The LM339M can operate from 2 V to 36 V, while the verified distributor listing identifies SOIC-14 packaging and a 0 °C to 70 °C temperature grade for the listed Texas Instruments LM339M variant. The four comparators share supply pins but have independent noninverting and inverting inputs. Pin assignment and input polarity must be verified against the manufacturer datasheet before layout, especially because the M suffix identifies the package configuration rather than a different comparator function.
Typical applications include DC overvoltage and undervoltage detection, battery threshold monitoring, industrial control interfaces, sensor conditioning, open-collector alarm signaling, and four-channel comparator banks in embedded systems. A pull-up resistor on each output is normally required. Inputs must remain within the device’s common-mode limits, and supply bypass should follow the manufacturer’s recommended layout practice to reduce susceptibility to switching noise and lead instability.
This page consolidates the verified LM339M specifications, source links, packaging information, and application-oriented design guidance. It deliberately separates confirmed values from unspecified electrical details; parameters not present in the supplied data are not inferred here.
直接替换替代料： LM339M ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
LM339M/NOPB
✅ 直接替换📋 参考替代料（不在目录中）
LM339DG
✅ 直接替换📋 参考替代料（不在目录中）
LM339M
✅ 直接替换✓ 有现货
联系询价
查看数据手册 →LM339M/NOPB
✅ 直接替换📋 参考替代料（不在目录中）
LM339M 最大额定值与电气特性
| Comparator Type | Quad differential voltage comparator |
| Number of Comparators | 4 independent comparators |
| Supply Voltage Range | 2 V to 36 V |
| 输入电压范围 | ±1 V to ±18 V |
| Response Time | 1.3 µs |
| Supply Current Drain | 800 µA typical |
| Input Bias Current | 25 nA typical |
| 输出类型 | Open-collector |
| 封装 | 14-pin SOIC |
| 工作温度 | 0 °C to +70 °C |
| 安装类型 | Surface mount |
| 引脚数 | 14 pins |
| Application Category | Standard general-purpose comparator |
| Logic Compatibility | Open-collector external pull-up interface |
| Manufacturer | Texas Instruments |
| Datasheet Description | Low-power low-offset voltage quad comparators |
| Input Common-Mode Range | Includes ground in single-supply operation |
| Drop-in Replacement Status | Use only verified pin-compatible alternatives |
LM339M 14-pin soic 引脚配置指南
LM339M（14-pin soic 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： LM339M.
请参阅 数据手册 以查看完整引脚配置。
典型应用
LM339M 适用于 6 应用s: Battery Undervoltage Detection, DC Overvoltage Protection, Industrial Sensor Interfacing, Open-Collector Alarm Interface, Power-Good Sequencing, Wired-Logic Level Translation.
Battery Undervoltage Detection
The LM339M fits battery undervoltage detection because its four independent channels can monitor multiple thresholds while the verified supply range is 2 V to 36 V. Connect resistor dividers to the noninverting and inverting inputs, then use each open-collector output to signal a regulator, load switch, or controller. A pull-up resistor establishes the logic-high state. Design the divider around the battery’s maximum cell voltage and account for input bias current, offset, and threshold tolerances before setting the trip points.
推荐
DC Overvoltage Protection
LM339M can provide an independent hardware overvoltage decision in a power-conversion or battery system. Its open-collector outputs can be wired to an inhibit, crowbar, relay driver, or digital controller input when the target voltage and sink-current requirements are verified. The 2 V to 36 V supply specification allows use across many DC rails, but the input divider, clamp strategy, response time of 1.3 µs, and fault-safe pull-up arrangement must be validated for the actual fault condition.
推荐
Industrial Sensor Interfacing
The LM339M is appropriate for low-power industrial sensor thresholding where a sensor produces an analog signal that must be converted into a control decision. Its typical 25 nA input bias current helps reduce loading of high-impedance sensor networks, while four channels provide independent comparisons in one package. The open-collector outputs can be pulled up to the logic rail used by a controller. Protect long sensor wiring against ESD and noise, and verify the input common-mode range for every operating rail.
推荐
Open-Collector Alarm Interface
LM339M suits alarm and fault-signaling circuits because its open-collector outputs can be connected to pull-up resistors or shared collector lines. A comparator channel can monitor a fault condition, while another channel can monitor power-good, overtemperature, or communication-line status. The pull-up voltage determines the interface level, and the output current limit must be checked against the number of wired devices. Use fail-safe logic so that a disconnected wire or power loss produces the intended alarm state.
推荐
Power-Good Sequencing
LM339M can monitor multiple power rails and generate discrete power-good signals using its four independent comparator channels. Each channel compares a divided rail voltage against a reference or another divided rail, and the open-collector output can feed an enable, reset, or status input through a pull-up. The 2 V to 36 V operating range is useful for monitoring varied DC rails, but sequencing delays, input offset, resistor tolerance, and the target controller’s enable thresholds require calculation and bench verification.
推荐
Wired-Logic Level Translation
LM339M can participate in simple open-collector level translation when one side uses a lower pull-up voltage and the other side uses a higher pull-up or receiving device. The open-collector structure is particularly useful for wired-AND or fault-tolerant logic because the output can sink current without actively driving a high level. Confirm voltage tolerances, leakage current, pull-up current, and logic timing at each connected node. The 1.3 µs listed response time should be checked against the required bus rise-time budget.
推荐
推荐产品汇总
工程参考数据： LM339M ——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 | LM339M/NOPB | LM339DG | LM339M | LM339M |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | onsemi | onsemi | Texas Instruments |
| Package | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC |
| Comparator Count | 4 | 4 | 4 | 4 | 4 |
关键差异点
- Four independent comparator channels in one 14-pin SOIC package （对比 LM339DG)
- Open-collector interface architecture （对比 LM339M/NOPB)
- Low-power operation and low input bias （对比 LM339M)
设计说明
Do not treat LM339M as a push-pull logic device. Every open-collector output needs a pull-up resistor when a stable high level is required. Select the pull-up voltage for the receiving logic, and calculate its current using the target low-state sink requirement. The supplied data confirms the open-collector architecture but does not provide the full output-current table, so consult the manufacturer datasheet before wiring multiple alert lines or an external connector.
Place input traces and output pull-up networks close to the 14-pin SOIC, keeping the analog comparison nodes away from switching-current paths and high-impedance sensor inputs. Use a common ground reference for the comparator and threshold network, and place supply bypass capacitance at the package supply pins according to the manufacturer layout guidance. Long traces increase susceptibility to noise and can make the 1.3 µs listed response time less representative of the complete circuit.
The LM339M can operate from 2 V to 36 V, but the external pull-up, input dividers, and connected logic must also be rated for the intended voltage. Do not use the supply range as permission to exceed the absolute maximum ratings. In dual-supply systems, verify input polarity and common-mode limits against the complete datasheet; the listed ±1 V to ±18 V input range should not be treated as permission for arbitrary negative signals.
合规信息
The supplied verified data does not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. The LM339M is an analog comparator rather than an automotive-qualified device in the provided data.
