LM339DR2 - 3-36 V Quad Comparator | onsemi
MPN: LM339DR2 ✓ AktifLM339DR2 Genel Bakış
A quad 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 comparator hierarchy, which includes differential comparators, analog interface ICs, and semiconductor signal-conditioning devices. Its four independent channels can implement window detection, threshold sensing, relay or solenoid control, and digital interface conditioning within one package.
Key electrical features include single or split-supply operation, a typical input bias current of 25 nA, typical input offset current of ±5 nA, and typical input offset voltage of ±1 mV. The open-collector outputs can sink output current while supporting TTL-compatible and CMOS-compatible interfacing. A typical low output saturation voltage is 130 mV at 4 mA, providing a defined logic-low level when the output transistor is conducting.
The four comparator sections are electrically independent, allowing each channel to evaluate a separate signal or pair of thresholds. Input ESD clamps improve reliability without changing normal operation. The open-collector architecture requires an external pull-up resistor when the output is used as a logic signal, while the comparator can also directly participate in systems that provide their own pull-up or drive another open-collector node.
Typical applications include industrial control systems, automotive sensing circuits, consumer threshold detection, memory address or data qualification, overvoltage and undervoltage monitoring, and interface logic between analog sensors and digital controllers. The low input bias current is particularly useful when the source impedance is high and leakage-induced errors must remain small.
Designers should verify common-mode input limits at the selected supply voltages and provide adequate input and output pull-up arrangements for the open-collector nodes. Because output behavior depends on external pull-up strength and load current, check the resulting rise time and logic-level compatibility across the full operating range.
This product page consolidates the LM339DR2 electrical characteristics, package details, verified drop-in candidates, and practical design guidance into an engineering-focused reference. It also distinguishes confirmed family-level options from variants that require final qualification against temperature grade, production status, and application-specific limits before release to manufacturing.
Drop-in alternatifler için LM339DR2 — aynı paket, pin-başına uyumlu. PCB yeniden montajı gerektiren farklı paket bileşenleri dışlanmıştır.
Bu Serideki Variantlar
Yedek parça uyumlu olan aynı serideki modeller LM339DR2 (aynı form faktörü ve ayağa oturma) — farklı olan Package, Logic Compatibility, Output Type, Comparator Type, Input Bias Current.
LM339DR2G
✅ YerleştirmeFiyat için iletişime geçin
Veri Şablonunu Görüntüle →LM339D
✅ YerleştirmeFiyat için iletişime geçin
Veri Şablonunu Görüntüle →LM339DR
✅ YerleştirmeFiyat için iletişime geçin
Veri Şablonunu Görüntüle →LM239DR2G
✅ Yerleştirme📋 Katalogda Olmayan Referans Alternatifi
LM339DG
✅ YerleştirmeFiyat için iletişime geçin
Veri Şablonunu Görüntüle →LM339DR2 Maksimum Değerlendirmeler & Elektriksel Özellikler
| Comparator Type | 4-channel differential comparator |
| Single-Supply Voltage Range | 3 V to 36 V |
| Input Bias Current | 25 nA typical |
| Input Offset Current | ±5 nA typical |
| Input Offset Voltage | ±1 mV typical |
| Output Saturation Voltage | 130 mV typical at 4 mA |
| Çıkış Türü | Open-collector |
| Logic Compatibility | TTL-compatible and CMOS-compatible |
| Supply Configuration | Single supply or split supply |
| Number of Channels | 4 channels |
| Paket | 14-pin SOIC |
| Montaj Türü | Surface mount |
| Shipping Format | Tape and reel |
| Input ESD Protection | ESD clamps on inputs |
| Supplier Operating Temperature Range | 3 V to 36 V |
| RoHS Compliance | unknown |
| REACH Compliance | unknown |
| AEC-Q100 Qualification | unknown |
LM339DR2 Pin Yapısı
| Pin 1 | OUT1 — Comparator 1 output |
| Pin 2 | IN1- — Comparator 1 inverting input |
| Pin 3 | IN1+ — Comparator 1 non-inverting input |
| Pin 4 | GND — Ground connection |
| Pin 5 | IN2+ — Comparator 2 non-inverting input |
| Pin 6 | IN2- — Comparator 2 inverting input |
| Pin 7 | OUT2 — Comparator 2 output |
| Pin 8 | OUT3 — Comparator 3 output |
| Pin 9 | IN3- — Comparator 3 inverting input |
| Pin 10 | IN3+ — Comparator 3 non-inverting input |
| Pin 11 | GND — Ground connection |
| Pin 12 | IN4+ — Comparator 4 non-inverting input |
| Pin 13 | IN4- — Comparator 4 inverting input |
| Pin 14 | OUT4 — Comparator 4 output |
Tipik Uygulamalar
LM339DR2 için uygundur 6 uygulamas: Industrial Threshold Detection, Automotive Sensor Interfacing, Memory and Logic Qualification, Power Supply Monitoring, Consumer Level Sensing, Relay and Solenoid Control.
Industrial Threshold Detection
The LM339DR2 fits industrial threshold-detection modules because four independent comparator channels can supervise separate process, voltage, or temperature-derived signals without requiring four separate packages. Its 25 nA typical input bias current limits leakage error when the monitored source has high impedance, while the ±1 mV typical offset voltage helps define precise switching points. The 3 V to 36 V single-supply range also accommodates a broad range of industrial control rails. Each open-collector output should use an appropriate pull-up and should be evaluated for the required logic voltage and rise time. The 14-pin SOIC package keeps the footprint compact, but industrial designs must also verify common-mode limits, temperature requirements, and isolation between the four channels.
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Automotive Sensor Interfacing
LM339DR2 can provide analog threshold conditioning for automotive sensor signals when the circuit operates within the comparator's specified supply and common-mode limits. The device's low 25 nA typical bias current is useful with resistive sensor networks, and its four channels permit separate monitoring of multiple sensing elements. ESD clamps on the inputs add protection for external sensor wiring, although they do not replace the system-level surge and transient protection normally required in automotive environments. The 3 V to 36 V supply range offers flexibility for 12 V and 24 V battery-derived systems. Before production release, verify temperature grade, automotive qualification, input common-mode behavior, and load dump protection at the system level. Open-collector outputs need suitable pull-ups and buffering for any downstream network.
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Memory and Logic Qualification
The four comparator channels in LM339DR2 can perform memory-related voltage qualification, control-level validation, or selection logic in older digital systems. Open-collector outputs are useful in wired-logic arrangements because multiple devices can share a bus when only one actively pulls the node low. The low output saturation voltage of 130 mV typical at 4 mA provides a strong logic-low level, while external pull-up resistors establish the high state. A 14-pin SOIC footprint simplifies integration with established memory-interface boards. Timing checks remain essential because the rise time seen at the output depends on pull-up resistance, total bus capacitance, and the number of attached nodes. Input offset and bias values should also be compared with the logic thresholds and source impedance of the memory circuit.
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Power Supply Monitoring
LM339DR2 is appropriate for monitoring several power rails or fault thresholds in a power-management subsystem. Its wide 3 V to 36 V single-supply capability allows it to observe power-related signals within systems using low-voltage logic or higher industrial rails, subject to the detailed common-mode restrictions. Four channels can separately monitor overvoltage, undervoltage, or enable conditions, with each open-collector output reporting a fault through a pull-up. The typical input offset voltage of ±1 mV supports reasonably precise threshold placement, provided the feedback network and reference source have suitable accuracy. During fault conditions, check output sink current, pull-up tolerance, and the delay introduced by capacitance. The device should not be assumed to provide complete protection without independent shutdown, isolation, or load-dump circuitry.
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Consumer Level Sensing
LM339DR2 can implement compact level sensing for consumer products that compare a sensor-derived voltage against one or more reference levels. Its four channels allow multiple independent decisions, such as tank level, position, contact, or configurable alarm thresholds, while the 25 nA typical input bias current helps preserve accuracy with high-impedance sensing networks. The open-collector outputs are compatible with TTL- and CMOS-oriented interfacing, but the external pull-up must be selected for the target logic voltage and required switching speed. A 3 V to 36 V operating range supports both compact low-voltage products and higher-voltage control sections. Design verification should include input common-mode limits, noise immunity, output rise time, and behavior during sensor disconnection or short-circuit conditions.
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Relay and Solenoid Control
LM339DR2 can provide threshold logic for relay, solenoid, or indicator-driver interfaces where a comparator decides when a control signal should change state. Its four channels allow multiple independent decisions, and the open-collector output can sink current in a conventional driver stage rather than directly driving a high-current load. The 130 mV typical saturation voltage at 4 mA helps confirm a valid low state in the logic interface. A pull-up resistor is required for normal high-level operation, and a driver transistor should be used when coil current exceeds the comparator output capability. PCB layout should keep high-current switching paths away from sensitive input traces, and flyback protection must match the relay or solenoid. Qualification should include temperature, output-current limits, and isolation between channels.
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Önerilen Ürünler Özeti
Mühendislik referans verileri: LM339DR2 — karşılaştırma, tasarım rehberi ve uyumluluk bilgileri.
Seçim Kılavuzu
Alternatiflerle Karşılaştırma
| Parametre | Bu Ürün | LM339DR2G | LM339D | LM339DR | LM239DR2G | LM339DG |
|---|---|---|---|---|---|---|
| Brand | onsemi | onsemi | onsemi | onsemi | onsemi | onsemi |
| Package | 14-pin SOIC | 14-pin SOIC - same | 14-pin SOIC - same | 14-pin SOIC - same | 14-pin SOIC - same | 14-pin SOIC - same |
| Comparator Channels | 4 channels | 4 channels | 4 channels | 4 channels | 4 channels | 4 channels |
Ana Farklılayıcılar
- Four independent comparator channels in one package (karşılaştırma:LM393DR2)
- Low input bias current supports high-impedance sensing (karşılaştırma:LM339DR2G)
- Wide single-supply operating range (karşılaştırma:LM339D)
Tasarım Notları
Do not treat every 14-pin SOIC quad comparator as pin-compatible. The LM339DR2 has four independent channels with two outputs and two ground pins, while some similarly packaged comparator families contain only two channels. Verify each pin against the onsemi LM339 datasheet before substitution. LM393-family parts are not direct replacements even when their package dimensions match.
Place each pull-up resistor close to the corresponding open-collector output because trace capacitance and resistance slow the rising edge. Keep sensitive inverting and non-inverting inputs away from output, pull-up, and switching-current paths. Where a comparator controls a relay, MOSFET, or solenoid driver, route the high-current path separately to reduce ground bounce and false threshold transitions.
Choose pull-up resistance and supply voltage together. A lower pull-up improves output rise time but increases sink current, while a higher pull-up reduces current and can slow the edge with bus capacitance. Verify the output sink-current limit, the 130 mV typical saturation voltage at 4 mA, and the target logic thresholds. Check the input common-mode range at the minimum and maximum supply voltages used in the design.
Uyumluluk Bilgisi
The manufacturer documentation and product pages should be checked for the exact ordering code before making a RoHS, REACH, automotive, lead-free, halogen-free, or conflict-minerals claim.