LM339EDR2G - Quad Comparator, 3-36V | onsemi
料号： LM339EDR2G ✓ 量产中LM339EDR2G 概述
A voltage comparator is an analog integrated circuit that compares two input voltages and produces a logic-level output indicating their relative polarity. Within the broader semiconductor hierarchy, a comparator belongs to the linear IC and signal-conditioning family, alongside amplifiers, voltage references, and interface devices. Quad comparators consolidate four independent comparison channels into one package, reducing board area in industrial controls, consumer equipment, and automotive electronics.
The LM339EDR2G offers low input bias current, low input offset current, and input common-mode voltage range extending to ground. These characteristics suit level detection and low-level sensing, where the comparator must detect small voltage changes without drawing excessive input current. Its output is TTL and CMOS compatible, allowing the device to interface with both older logic families and modern low-voltage digital circuits. ESD clamps on the inputs improve reliability in applications where electrostatic discharge may occur.
Operation from a single supply simplifies designs that do not have a negative rail, while split-supply operation permits sensing around ground. Each open-collector output can sink current from a load or pull-up network, allowing the output transition speed and level to be controlled externally. The LM339 is not intended as a high-speed comparator; its role is general-purpose thresholding, signal conditioning, and simple decision logic rather than waveform timing at high frequencies.
Typical uses include consumer and automotive level detection, industrial sensor interfaces, memory threshold detection, power-supply monitoring, and control systems. The low input currents are particularly useful with high-impedance sensors, while the wide single-supply range supports multiple industrial and automotive rails. An external pull-up is required for the open-collector outputs when a valid logic-high level is needed.
PCB layout should keep sensitive input traces away from output and pull-up return paths, while placing the device close to the sensed node when trace resistance could affect the comparison threshold. Verify input and output absolute maximum ratings, common-mode range, pull-up values, and propagation delay for the intended supply voltage before releasing a production design.
This product page combines the manufacturer electrical characteristics, package information, sourcing details, drop-in assessment, and practical PCB guidance into a focused engineering reference. It is intended to help designers select the LM339EDR2G, understand its operating limits, compare relevant alternatives, and implement the four comparator channels correctly in level-detection and sensing circuits.
直接替换替代料： LM339EDR2G ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
LM339EDR2G 最大额定值与电气特性
| Comparator Channel Count | 4 channels |
| Single-Supply Operating Voltage | 3.0 V to 36 V |
| Split-Supply Operating Voltage | ±1.5 V to ±18 V |
| Typical Input Bias Current | 25 nA |
| Typical Input Offset Current | ±5.0 nA |
| Typical Output Saturation Voltage | 130 mV at 4.0 mA |
| 输出类型 | Open-collector |
| Logic Compatibility | TTL and CMOS compatible |
| Input Common-Mode Range | Extended to GND |
| Input ESD Protection | ESD clamps on inputs |
| 封装 | 14-pin SOIC |
| 安装类型 | Surface mount |
LM339EDR2G 14-pin soic 引脚配置指南
LM339EDR2G（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： LM339EDR2G.
请参阅 数据手册 以查看完整引脚配置。
典型应用
LM339EDR2G 适用于 6 应用s: Industrial Sensor Threshold Detection, Automotive Level and System Monitoring, Consumer Equipment Level Detection, Power Supply Supervision, Memory Threshold and Window Detection, Industrial Logic and Control Interface.
Industrial Sensor Threshold Detection
The LM339EDR2G fits industrial sensor interfaces that compare a slowly changing analog signal with a reference voltage. Its 25 nA typical input bias current limits loading on high-impedance sensors, while the ±5.0 nA typical input offset current helps reduce error at the comparison node. Four channels can monitor separate temperature, pressure, level, or process signals without requiring four packages. Use the device between the sensor and logic input, add hysteresis for stable threshold switching, and account for input offset voltage and resistor tolerance when setting the trip point.
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Automotive Level and System Monitoring
The LM339EDR2G is suitable for automotive level-detection and system-monitoring functions where the circuit must operate from a wide single supply and detect signals near ground. Its 3.0 V to 36 V operating range covers numerous vehicle rails, and ESD clamps on the inputs improve robustness in electrically noisy environments. The open-collector output also permits a pull-up to the local logic rail. Confirm the exact automotive qualification and temperature grade for the selected ordering variant before releasing a safety- or vehicle-critical design.
推荐
Consumer Equipment Level Detection
The LM339EDR2G can implement four threshold decisions in consumer equipment such as battery monitors, charger controls, panel interfaces, and protective cutoff circuits. The low typical input bias current of 25 nA is useful when the sensing node has a high source impedance, and the output saturation voltage of 130 mV at 4.0 mA provides a defined pulled-down state. Choose pull-up values that meet the receiving logic's input-current limits, and add positive feedback for hysteresis when the sensed signal can cross the threshold slowly.
推荐
Power Supply Supervision
The LM339EDR2G can monitor several power rails, battery thresholds, or enable sequencing signals within a control system. Its 36 V maximum single-supply operating range allows direct monitoring of higher-voltage rails, while the common-mode range extending to ground supports detection near 0 V. Each open-collector output can independently pull down a wired logic node through an appropriate pull-up. Designers should verify the exact input absolute maximum ratings, supply sequencing conditions, and output timing against the monitored rail before using the device as a primary protection element.
推荐
Memory Threshold and Window Detection
The LM339EDR2G is explicitly identified for memory applications, where one or more channels can compare a memory-related voltage against upper and lower limits. Its low input bias current of 25 nA and typical input offset current of ±5.0 nA make it practical for relatively high-impedance sensing networks. Four channels can form two window comparisons or support several independent thresholds. Use resistor ratios with tight tolerances, account for input offset voltage, and establish hysteresis to prevent repeated switching when the monitored voltage changes only slightly around the reference.
推荐
Industrial Logic and Control Interface
The LM339EDR2G bridges analog control signals and digital logic in industrial systems using its four open-collector comparison channels. TTL and CMOS compatibility allows the pulled-up outputs to connect to logic operating at the system rail, subject to the pull-up voltage and output-current limits. The device is better suited to thresholding and static logic decisions than high-speed pulse comparison. Route each channel from the comparator output to its pull-up and receiving logic input, and keep sensitive input traces away from switching nodes to reduce false threshold transitions.
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推荐产品汇总
工程参考数据： LM339EDR2G ——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 | LM339DR2G |
|---|---|---|
| Brand | onsemi | onsemi |
| Package | 14-pin SOIC | 14-pin SOIC - same |
| Comparator Channels | 4 channels | 4 channels |
| Single-Supply Voltage | 3.0 V to 36 V | 3.0 V to 36 V |
| Split-Supply Voltage | ±1.5 V to ±18 V | ±1.5 V to ±18 V |
| Typical Input Bias Current | 25 nA | 25 nA |
| Typical Input Offset Current | ±5.0 nA | ±5.0 nA |
| Output Saturation Voltage | 130 mV at 4.0 mA | 130 mV at 4.0 mA |
| Output Type | Open-collector | Open-collector |
| Logic Compatibility | TTL and CMOS compatible | TTL and CMOS compatible |
| Input ESD Protection | ESD clamps on inputs | ESD clamps on inputs |
关键差异点
- Four comparison channels in one package （对比 Single-channel comparator devices such as TLV2402ID)
- Wide single-supply operating range （对比 TS339)
- Low input loading for impedance-sensitive sensing （对比 Comparator circuits using higher-input-current devices)
设计说明
Place each external pull-up resistor close to the corresponding LM339EDR2G output or receiving logic input to limit trace inductance and reduce switching transients. Route differential input pairs together and keep them away from pull-up nets, relay contacts, inductors, and other high-current paths. For sensitive threshold measurements, use a grounded guard or shield around the input node when the source impedance is high, since leakage current on the PCB can create an error comparable to the comparator's input currents.
Do not allow the input voltage to exceed the device's absolute maximum rating when a signal source remains powered during shutdown or fault conditions. The common-mode range extending to GND does not permit arbitrary positive input voltages, and the 36 V single-supply rating is an operating limit rather than a general-purpose transient withstand rating. Use series input resistors, clamp protection, and power-source shutdown sequencing where an external fault could backfeed the comparator.
Add positive feedback or another defined hysteresis network when the compared signal has noise or a slow slope near the threshold. This prevents the output from repeatedly toggling as the input crosses the reference voltage. The hysteresis resistor should load the input node as little as practical because the LM339EDR2G has a typical input bias current of 25 nA and a typical input offset current of ±5.0 nA; excessive divider resistance can therefore degrade threshold accuracy.
The open-collector output requires an external pull-up to a suitable logic rail; the device does not actively drive a CMOS push-pull high state. Select the pull-up value from the output sink-current rating, receiver leakage current, propagation-delay requirement, and maximum switching-node capacitance. Verify that the pull-up voltage remains within the applicable device ratings and that the receiver can interpret the resulting high level reliably in the selected temperature and supply conditions.
合规信息
The product excerpts describe automotive and industrial applications but do not provide explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. Confirm these statuses using the current onsemi product documentation and the exact ordering variant.