LM339APWG4 - 4-Channel 30V Comparator | Texas Instruments
料号： LM339APWG4 ⚠ 最后一次采购LM339APWG4 概述
A comparator is an analog interface IC that converts the relationship between two voltages into a logic-compatible output. The LM339 belongs to the wider comparator hierarchy, which sits between general-purpose analog signal conditioning and digital control. Each of its four independent channels includes a non-inverting input, an inverting input, and an open-collector output, allowing a system to monitor thresholds, detect crossings, or supervise external signals.
Key features include a maximum rating of up to 38 V, a differential input range equal to the maximum-rated supply voltage, and operation with common-mode input voltage extending to ground. According to the Texas Instruments LM339 product page, the outputs are compatible with TTL, MOS, and CMOS logic. The open-collector architecture requires an external pull-up resistor and gives the designer control over rise time, output level, and wired-output behavior.
The LM339 family is designed for single-supply or dual-supply operation, providing flexibility in industrial control, automotive electronics, and low-voltage systems. Its differential inputs support direct comparison of sensor outputs or two analog nodes, while the wide supply range permits use from modest single-rail systems through higher-voltage industrial environments. The A version provides tighter input characteristics than the standard LM339 variant, including a low input offset of 0.37 mV and low input bias current of 3.5 nA.
Typical uses include level detection, window comparators, overvoltage monitoring, temperature-control loops, zero-cross detection, and low-level sensing. The four channels can also be arranged as two independent window comparators, or used for mixed tasks such as a sensor threshold, a supply supervisor, and a timing comparator within one package.
Designers must account for the open-collector output and its pull-up network, verify the common-mode and differential input limits, and maintain adequate logic-level compatibility. Input protection, hysteresis for noisy analog signals, and stable bypassing of the supply rails are essential for reliable operation. Because the output is open collector, multiple channels or external devices can share a pull-up when their logic states do not conflict.
This page combines the manufacturer’s device description, verified distributor specifications, lifecycle information, same-package replacement guidance, and practical design notes. It helps engineers identify whether the LM339APWG4 fits a four-channel open-collector design while distinguishing it from newer dual-channel, rail-to-rail, and push-pull comparator families.
直接替换替代料： LM339APWG4 ——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： LM339APWG4 （相同外形与封装尺寸） ——差异在于 Package, Comparator Type, Logic Compatibility, Output Type, Differential Input Voltage Range.
LM339PWG4
✅ 直接替换联系询价
查看数据手册 →LM339APWRG4
✅ 直接替换📋 参考替代料（不在目录中）
LM339PWRE4
✅ 直接替换联系询价
查看数据手册 →LM339PWRG4
✅ 直接替换联系询价
查看数据手册 →LM2901AVQPWR
✅ 直接替换📋 参考替代料（不在目录中）
LM139APT
✅ 直接替换📋 参考替代料（不在目录中）
LM339APWG4 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 |
| Single-Supply Operating Range | 2 V to 30 V |
| Dual-Supply Operating Range | ±1 V to ±15 V |
| Maximum Voltage Rating | Up to 38 V |
| Differential Input Voltage Range | ±38 V |
| Common-Mode Input Range | Includes ground |
| Low Input Offset Voltage | 0.37 mV |
| Low Input Bias Current | 3.5 nA |
| 电源电流 | 200 µA per comparator |
| ESD Rating | 2 kV HBM |
| Logic Compatibility | TTL, MOS, and CMOS |
| 封装 | 14-pin TSSOP (PW), 4.40 mm width |
| 安装类型 | Surface mount |
| 工作温度范围 | 0 °C to 70 °C |
| 生命周期状态 | Last Time Buy |
LM339APWG4 引脚配置
| 引脚 1 | 1OUT — Comparator 1 open-collector output |
| 引脚 2 | 1IN- — Comparator 1 inverting input |
| 引脚 3 | 1IN+ — Comparator 1 non-inverting input |
| 引脚 4 | GND — Ground connection |
| 引脚 5 | 2IN+ — Comparator 2 non-inverting input |
| 引脚 6 | 2IN- — Comparator 2 inverting input |
| 引脚 7 | 2OUT — Comparator 2 open-collector output |
| 引脚 8 | 3OUT — Comparator 3 open-collector output |
| 引脚 9 | 3IN- — Comparator 3 inverting input |
| 引脚 10 | 3IN+ — Comparator 3 non-inverting input |
| 引脚 11 | VCC — Positive supply connection |
| 引脚 12 | 4IN+ — Comparator 4 non-inverting input |
| 引脚 13 | 4IN- — Comparator 4 inverting input |
| 引脚 14 | 4OUT — Comparator 4 open-collector output |
典型应用
LM339APWG4 适用于 6 应用s: Industrial Threshold Detection, Automotive Sensor Supervision, Power Supply Overvoltage Detection, Temperature Control Loop, Zero-Cross and Signal Transition Detection, Window Comparator and System Limit Detection.
Industrial Threshold Detection
The LM339APWG4 fits industrial threshold detection because four channels can monitor independent analog inputs while operating from a single 2 V to 30 V supply or from ±1 V to ±15 V supplies. Each channel compares a sensor signal against a reference and produces an open-collector result for a controller input. The A version’s 0.37 mV input offset and 3.5 nA input bias current help preserve decision accuracy near the switching point. Because the output is open collector, use a properly sized pull-up resistor and confirm that the resulting high level satisfies the receiving logic. Add hysteresis where the monitored signal crosses slowly or contains noise.
推荐
Automotive Sensor Supervision
The LM339APWG4 can be used for automotive-style sensor supervision where multiple voltage thresholds must be converted into logic states. Its wide 2 V to 30 V operating range supports higher-voltage systems, and the common-mode input range includes ground for signals near the lower rail. The four open-collector channels can monitor battery, sensor, or actuator conditions, but the 0 °C to 70 °C grade must be checked against the vehicle environment. If the program requires documented automotive qualification, select a specifically qualified orderable part and confirm its pin arrangement, temperature range, and lifecycle before substitution.
推荐
Power Supply Overvoltage Detection
LM339APWG4 channels can monitor a power rail and assert an open-collector fault signal when the measured voltage crosses a defined threshold. The 30 V single-supply range covers industrial rails, while the input common-mode range extending to ground simplifies low-side supervision. A divided rail signal can be compared against a stable reference without requiring the comparator itself to withstand the full monitored voltage. Design the resistor divider for the correct current and tolerance, add hysteresis to avoid repeated fault assertions, and account for the open-collector pull-up current when calculating total power. The comparator does not disconnect the rail; it provides the detection signal for a controller or protection circuit.
推荐
Temperature Control Loop
The LM339APWG4 can compare a temperature-sensor signal with an adjustable reference to implement a basic heating or cooling control loop. Four channels allow temperature, fan, and fault conditions to be supervised in one package, while the open-collector output can directly drive a suitable transistor or relay-driver stage. The A version’s 0.37 mV offset can be useful when the sensor produces a low-level analog signal, although resistor-network error and temperature drift may dominate system accuracy. Use hysteresis to establish separate turn-on and turn-off thresholds, keep the sensor trace away from switching currents, and select the pull-up voltage to remain compatible with the downstream logic.
推荐
Zero-Cross and Signal Transition Detection
LM339APWG4 channels are suitable for detecting zero crossings or other signal transitions when an external reference defines the comparison point. The differential input structure accepts two analog nodes, and the open-collector output provides a flexible logic-polarity interface through the pull-up network. For AC-coupled signals, establish a bias near the middle of the input common-mode range and compare the signal against that bias. Keep the bias network stable and account for input bias current when choosing high-value resistors. Slew rate at the crossing can cause repeated switching, so hysteresis or filtering may be required for clean edge generation.
推荐
Window Comparator and System Limit Detection
Two LM339APWG4 channels can be configured as upper and lower limits around a permitted signal range, while the remaining channels perform other monitoring functions. This arrangement is useful for battery, signal-generator, actuator, or sensor-interface modules that must flag both excessive and insufficient conditions. The device’s single-supply operation from 2 V to 30 V and ground-inclusive common-mode range simplify many industrial partitions. Choose resistor dividers with suitable precision and temperature coefficient, use separate pull-up resistors where outputs drive different loads, and define hysteresis around both thresholds. Open-collector outputs cannot actively drive a high voltage, so the pull-up network and downstream input leakage must be included in the logic design.
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推荐产品汇总
工程参考数据： LM339APWG4 ——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 | LM339PWG4 | LM339APWRG4 | LM339PWRE4 | LM339PWRG4 | LM2901AVQPWR | LM139APT |
|---|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | STMicroelectronics | STMicroelectronics |
| Package | 14-pin TSSOP (PW), 4.40 mm width | 14-pin TSSOP (PW) | 14-pin TSSOP (PW) | 14-pin TSSOP (PW) | 14-pin TSSOP (PW) | 14-pin TSSOP (PW) | 14-pin TSSOP (PW) |
| Comparator Channels | 4 channels | 4 channels | 4 channels | 4 channels | 4 channels | 4 channels | 4 channels |
| Special Features | A version; ground-inclusive common-mode range; TTL, MOS, and CMOS output compatibility | Standard LM339 version | A version; ground-inclusive common-mode range; TTL, MOS, and CMOS output compatibility | Enhanced standard LM339 ordering code | Standard LM339 version | Automotive-oriented A/V suffix | Military-temperature comparator |
关键差异点
- A-version precision characteristics （对比 LM339PWG4)
- Four independent channels in a compact package （对比 LM2901AVQPWR)
- Wide single- and dual-supply operation （对比 LM139APT)
设计说明
Do not treat the open-collector output as a push-pull logic output. Install a pull-up resistor at every output used as a logic signal, and verify the resistor against input leakage, required rise time, and the output’s sink-current rating. When two outputs share a pull-up, confirm that the design never expects one output to drive the shared node low while the other must communicate high. The pull-up also contributes continuous power whenever the output transistor is off.
Add hysteresis with positive feedback when noise or slow input transitions can cause repeated output chatter. Calculate the feedback network around the actual threshold and output pull-up rather than relying on a generic resistor value. Keep the two input traces short, place the threshold-setting components near the device, and maintain a clean return path. The A version’s 0.37 mV input offset improves intrinsic comparison accuracy, but it does not remove errors from the reference, divider tolerances, temperature gradients, or coupled noise.
Place the input, output, and supply-routing network so that output switching currents do not flow through the comparator ground reference used by sensitive analog inputs. Use a compact ground return and decouple the supply close to the device with the capacitance and voltage rating recommended by the manufacturer datasheet. The TSSOP lead pitch requires careful assembly alignment, so inspect the pin-1 orientation and verify that exposed package features, if any, match the selected land pattern.
Estimated: the four comparators contribute approximately 800 µA of nominal supply current when each channel uses the 200 µA typical figure. Add each pull-up resistor’s continuous current, calculated as pull-up voltage divided by pull-up resistance, to determine total device-system consumption. This estimate excludes input bias current, leakage, output saturation voltage, and transient load, so validate the final value against the worst-case electrical limits in the manufacturer datasheet.
合规信息
The 0 °C to 70 °C LM339APWG4 listing is not identified as an AEC-Q100-qualified automotive orderable part. RoHS, REACH, lead-free, halogen-free, and conflict-minerals status require confirmation from current manufacturer documentation.
