LM339DRE4 - Quad Open-Collector Comparator | Texas Instruments
Référence : LM339DRE4 ✓ ActifLM339DRE4 Présentation
An analog comparator is an integrated circuit that compares two voltage signals and produces a logic-level indication of their relative relationship. Within the broader semiconductor hierarchy, the LM339 belongs to the comparator IC and linear analog IC families. Its four independent channels reduce component count when a system requires multiple sensing, window-detection, or control decisions.
Important electrical characteristics include low input bias current of 3.5 nA, low supply current of 200 µA per comparator, a fast response time, and an open-collector output architecture. The open-collector outputs permit wired-AND operation and require an external pull-up resistor. This architecture also gives the designer control over output rise time and logic voltage compatibility.
The LM339 supports single-supply operation from 2 V to 36 V. Under dual-supply conditions, the common-mode input range depends on the supply arrangement. The manufacturer datasheet states that neither input should normally be driven more than 0.3 V below the negative supply, while the upper common-mode limit is typically VCC minus 1.5 V. Proper input-range design is therefore essential in battery-powered and mixed-polarity systems.
Typical applications include industrial sensor interfaces, battery monitoring, window comparators, overvoltage detection, motor-control logic, and general digital threshold conversion. The quad-channel format is particularly useful when four independent measurements or control points must be handled in one package. Its low input bias current also reduces errors when connected to high-impedance sensing networks.
Designers should pull each output up to a suitable supply through an external resistor and account for the open collector's off-state leakage when analyzing bus behavior. PCB placement should keep sensitive input traces away from switching nodes and the pull-up network. Input filtering should use resistors and capacitors selected for the required response time rather than excessively slowing the comparator.
This product page combines manufacturer specifications, application guidance, pin-level information, and practical design notes to support component selection and PCB implementation. It also provides structured comparison data for evaluating pin-compatible LM339-family and related comparator options.
Alternatives de remplacement direct pour LM339DRE4 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec LM339DRE4 (même facteur de forme et même empreinte) — différant par Comparator Type, Logic Compatibility, Response Time, Package, Output Type.
LM339DRG4
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →LM339D
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →LM339ADR
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →LM339M
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →LM2904PW
✅ Remplacement direct ⚠️ Spécifications non vérifiéesContactez-nous pour le prix
Voir la fiche technique →LM339DR
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →LM339DRE4 Valeurs maximales et caractéristiques électriques
| Comparator Type | Quad differential comparator |
| Number of Channels | 4 channels |
| Supply Voltage Range | 2 V to 36 V |
| Maximum Supply Rating | 38 V |
| Tested Supply Voltage | 30 V |
| Type de sortie | Open-collector |
| Input Offset Voltage | 0.37 mV |
| Input Offset Voltage Maximum | 9 mV |
| Input Bias Current | 3.5 nA |
| Courant d'alimentation | 200 µA per comparator |
| Response Time | 300 ns |
| Common-Mode Input Upper Limit | VCC - 1.5 V |
| Negative Input Swing Limit | -0.3 V below negative supply |
| ESD Rating HBM | 2 kV |
| Boîtier | 14-pin SOIC |
| Type de montage | Surface mount |
| Operating Temperature Grade | 0 °C to 70 °C |
Configuration des broches de LM339DRE4
| Broche 1 | OUT 1 — Comparator 1 open-collector output |
| Broche 2 | IN 1- — Comparator 1 inverting input |
| Broche 3 | IN 1+ — Comparator 1 non-inverting input |
| Broche 4 | GND — Ground connection |
| Broche 5 | IN 2+ — Comparator 2 non-inverting input |
| Broche 6 | IN 2- — Comparator 2 inverting input |
| Broche 7 | OUT 3 — Comparator 3 open-collector output |
| Broche 8 | OUT 2 — Comparator 2 open-collector output |
| Broche 9 | IN 3- — Comparator 3 inverting input |
| Broche 10 | IN 3+ — Comparator 3 non-inverting input |
| Broche 11 | GND — Ground connection |
| Broche 12 | IN 4+ — Comparator 4 non-inverting input |
| Broche 13 | IN 4- — Comparator 4 inverting input |
| Broche 14 | OUT 4 — Comparator 4 open-collector output |
Applications typiques
LM339DRE4 convient pour 6 applications: Industrial Sensor Threshold Detection, Battery Voltage Monitoring, Motor Control and Overcurrent Detection, Window Voltage Detector, Digital Logic Interface, Portable and Low-Power Monitoring.
Industrial Sensor Threshold Detection
The LM339DRE4 is appropriate for conditioning slow or moderate-speed industrial sensor signals because four independent channels fit multiple threshold decisions in one 14-pin SOIC package. Its 0.37 mV input offset and 3.5 nA input bias current reduce errors with high-impedance sensing networks, while the 300 ns response time supports prompt threshold changes. Place each output pull-up close to the device and keep sensor inputs away from switching-power traces. The 0 °C to 70 °C grade is appropriate for temperature-controlled indoor equipment, but additional environmental protection may be needed near motors, heaters, or process equipment.
Recommandé
Battery Voltage Monitoring
The LM339DRE4 can monitor several battery or power-rail thresholds when its 2 V to 36 V operating range covers the intended voltage. Four channels allow comparisons against different reference levels, while low input bias current helps avoid loading high-source-impedance dividers. The open-collector outputs can pull up to the system logic supply, making the comparator useful for driving discrete level indicators or digital inputs. Designers should account for the maximum 38 V supply rating, protect inputs from transients, and ensure signals remain inside the common-mode range. A divider can shift a battery voltage into the comparator's usable input window when operating from a single low-voltage supply.
Recommandé
Motor Control and Overcurrent Detection
The LM339DRE4 can implement independent limit checks around a motor-control or power-conversion subsystem, including overvoltage, undervoltage, and current-sense threshold functions. Its 300 ns response time is useful when the control loop must react quickly, and the four-channel arrangement reduces the number of comparator packages required. Open-collector outputs permit wired-AND fault signaling, although every bus node needs suitable pull-up treatment. The design must leave adequate input headroom, use pull-ups that do not exceed the output transistor's voltage rating, and provide filtering that suppresses switching noise without introducing excessive delay.
Recommandé
Window Voltage Detector
A pair of LM339DRE4 channels can monitor whether a signal lies between an upper and lower limit, while the remaining channels monitor other rails or conditions. This arrangement is useful in power-quality, instrument, and equipment-protection circuits where an open-collector fault indication is preferred. The low 200 µA per-comparator supply current suits compact systems, and the 36 V maximum operating voltage supports many industrial rails. Set thresholds with stable references, account for input offset over temperature, and include hysteresis to prevent repeated switching when the monitored signal crosses a limit slowly.
Recommandé
Digital Logic Interface
The LM339DRE4 can convert analog control voltages into open-collector digital indications for legacy logic, relay drivers, and alarm inputs. Its 300 ns response time allows reasonably rapid transitions, and the open-collector output is useful where several conditions must share a fault bus. The pull-up resistor determines the logic high level and output rise time rather than the comparator itself. Select a value that balances bus capacitance, power consumption, and required switching speed. Confirm that the logic supply and pull-up voltage remain within the device's absolute maximum ratings.
Recommandé
Portable and Low-Power Monitoring
The LM339DRE4 is suitable for portable equipment that monitors several slow-changing voltages while keeping supply consumption modest. Its 200 µA typical supply current per comparator and 3.5 nA input bias current reduce loading in battery-powered systems, while four channels consolidate monitoring functions. Low-voltage operation begins at 2 V, but the common-mode range remains narrower than the supply range, so sensor signals should be biased or divided into that window. Power-gate the device when continuous monitoring is unnecessary, and use a pull-up resistor that does not create excessive static current in a duty-cycled design.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour LM339DRE4 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | LM339DRG4 | LM339D | LM339ADR | LM339M | LM2904PW | LM339DR |
|---|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | onsemi |
| Package | 14-pin SOIC | 14-pin SOIC - same footprint | 14-pin SOIC - same footprint | 14-pin SOIC - same footprint | 14-pin SOIC - same footprint | 14-pin SOIC - same footprint | 14-pin SOIC - same footprint |
| Comparator Configuration | Quad differential comparator | Quad differential comparator | Quad differential comparator | Quad differential comparator | Quad differential comparator | Quad differential comparator | Quad differential comparator |
| Output Type | Open-collector | Open-collector | Open-collector | Open-collector | Open-collector | Open-collector | Open-collector |
Principaux différenciateurs
- Four independent comparators in one package (vs LM2904PW)
- Direct family identity with the LM339DRG4 ordering option (vs LM339DRG4)
- Cross-brand sourcing option in the same footprint (vs LM339DR)
Notes de conception
Route each open-collector output to its pull-up resistor with a short trace, and place the resistor close to the comparator pin or the associated logic input. Longer traces increase susceptibility to capacitive coupling and slow the rising edge when the bus capacitance is high. Keep the four input pairs away from relay-coil wiring, switching nodes, and other high-current paths. A solid ground plane and short ground-return paths help establish predictable comparator behavior in mixed-signal equipment.
Do not assume that the full 2 V to 36 V supply range is also a valid input range. The upper common-mode limit is approximately VCC minus 1.5 V, and an input should not be driven more than 0.3 V below the negative supply. In single-supply systems, bias the compared signals into the usable window or divide them down. Also verify absolute maximum voltages during power-up, shutdown, and fault conditions, since the comparator input can remain exposed while its supply ramps.
Choose the output pull-up from the required rise time, bus capacitance, and static-current budget. A lower pull-up produces a faster edge but increases supply current when the output transistor is active; a higher value reduces power consumption but slows the logic transition. Add hysteresis around slowly changing thresholds to prevent chatter. For noisy sensor inputs, use a filtered reference or a small input RC network whose added delay remains compatible with the required 300 ns response target.
Informations de conformité
The LM339DRE4 is a general-purpose commercial-temperature comparator. No automotive qualification or specific environmental-compliance declaration was confirmed for the exact ordering code.
