LM339D - 4-Comparator Open-Collector IC | Texas Instruments
Артикул: LM339D ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $0 | $0,00 |
| 10 | $0 | $0,00 |
| 100 | $0 | $0,00 |
| 500 | $0 | $0,00 |
| 1.000 | $0 | $0,00 |
LM339D Обзор
A voltage comparator is an analog comparator that evaluates two input voltages and changes its output state according to their relationship. The LM339 belongs to the comparator, analog IC, and signal-conditioning hierarchy. Unlike an op-amp configured for linear amplification, a comparator is intended for open-loop decision making. Its open-collector output requires an external pull-up resistor and can be wired with multiple comparator outputs when the electrical conditions permit.
The four independent channels allow one package to perform several threshold decisions. Open-collector outputs can interface with TTL, MOS, and CMOS-compatible circuits according to the family documentation, while the wide supply capability supports industrial and automotive-style environments. The low input bias current is useful when the comparator senses high-impedance sources, although input offset, common-mode range, output saturation, and supply limits must still be checked in the complete design.
The LM339 family is supported by TI’s application guidance for TL331, LM339, and LM393 devices, which emphasizes correct use of open-collector outputs, pull-up networks, input protection, and supply bypassing. The package and pin arrangement should be verified against the selected manufacturer’s datasheet before layout release, especially when replacing a part sourced from another manufacturer.
Typical applications include sensor threshold detection, battery or power-system monitoring, window comparator circuits, logic-level translation, relay or solenoid drive interfaces, and industrial control inputs. An external pull-up resistor is normally placed from each output to the downstream logic supply so that the open-collector transistor can pull the line low and release it high.
The main design consideration is that an open-collector output is not a push-pull logic output. Choose the pull-up voltage and resistor for the receiving device, verify output sink current, and account for the positive logic level at the receiver input. Place bypass capacitors close to the supply pins and keep sensitive input traces away from output and switching-current paths.
This product page consolidates verified distributor identity, manufacturer family specifications, package information, sourcing links, and engineering-oriented usage guidance. Exact pricing, stock, alternative parameter tables, and manufacturer-specific pin details remain dependent on the cited source pages and are not inferred where the supplied evidence is incomplete.
Аналоги без доработки для LM339D — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с LM339D (тот же форм-фактор и посадочное место) — отличается по Package, Comparator Type, Logic Compatibility, Mounting Type, Response Time.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
LM339BD
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
LM339N
✅ Прямая замена ⚠️ Характеристики не проверены✓ В наличии
$0.38 / шт.
Открыть даташит →LM339DR
✅ Прямая замена ⚠️ Характеристики не проверены✓ В наличии
$0.15 / шт.
Открыть даташит →LM339DT
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
LM339D
✓ В наличии
Уточнить цену
Открыть даташит →LM339D Максимальные параметры и электрические характеристики
| Comparator Count | 4 |
| Product Type | General-purpose differential voltage comparator |
| Тип выхода | Open-collector |
| Supply Operation | Single or split supply |
| Maximum Rated Supply Voltage | Up to 38 V |
| Input Offset Voltage | 0.37 mV |
| Input Bias Current | 3.5 nA |
| Ток потребления | 200 µA per comparator |
| Response Time | 1 µsec |
| ESD Rating HBM | 2 kV |
| Корпус | 14-pin SOIC |
| Logic Compatibility | TTL, MOS, and CMOS-compatible output |
Руководство по цоколевке LM339D в корпусе 14-pin soic
Цоколевка для LM339D (корпус 14-pin soic). Этот аналоговый компонент имеет выводы входа, выхода и питания. Обратитесь к техническому описанию производителя для конфигураций выводов балансировки нуля, коррекции и разрешения. Идеально подходит для схем обработки сигналов и усилителей.
Нет подробных данных о распиновке для LM339D.
Обратитесь к даташиту для полной конфигурации выводов.
Типичное применение
LM339D подходит для 6 применениеs: Sensor Threshold Detection, Power-System Monitoring, Window and Limit Comparison, Industrial Logic Interfacing, Relay and Solenoid Control, Memory and Level Control.
Sensor Threshold Detection
LM339D fits low-level sensing when a sensor output must be translated into a digital decision. Its verified family data lists 3.5 nA input bias current, which helps avoid loading high-impedance sensor nodes, and 0.37 mV input offset voltage, which supports threshold placement near the signal level. Each of the four channels can compare a sensor input against a reference, while the open-collector output can pull up to the logic system’s supply. Add input clamping and verify the common-mode range before connecting the sensor.
Рекомендуется
Power-System Monitoring
LM339D can supervise battery, supply, or system rails by comparing divided voltages against references and producing open-collector fault signals. The family’s single or split supply capability and maximum rated voltage of up to 38 V provide flexibility in industrial monitoring designs, while 200 µA supply current per comparator supports low-power systems. The designer must confirm the exact input voltage limits and use resistor-divider values that keep signals inside the permitted operating range.
Рекомендуется
Window and Limit Comparison
LM339D is suitable for window detection because the device contains four independent differential comparators rather than a single shared input stage. Two channels can establish upper and lower thresholds around a signal, and the remaining channels can provide additional limit checks or fault flags. The open-collector outputs can be pulled up to a common fault bus when their logic states are compatible. Verify input common-mode limits and propagation behavior when the thresholds must respond accurately.
Рекомендуется
Industrial Logic Interfacing
LM339D can interface low-voltage or analog control signals with TTL, MOS, and CMOS-compatible logic through its open-collector outputs. The output transistor provides a controlled low state, while an external pull-up resistor establishes the high level required by the receiver. This architecture is useful for wired-OR fault signals and level-driven industrial interfaces, but the pull-up voltage and resistor must be selected to satisfy sink-current, rise-time, and receiver-input-current requirements.
Рекомендуется
Relay and Solenoid Control
LM339D can generate a low-side control signal for a relay driver, solenoid driver, or discrete transistor stage after comparing a control voltage with a reference. The open-collector output is naturally suited to pulling up a transistor base or gate resistor network, provided the pull-up rail and transistor arrangement are designed for the required current. Add flyback protection for inductive loads and verify the comparator’s output saturation and absolute maximum limits under worst-case supply conditions.
Рекомендуется
Memory and Level Control
LM339D is identified by its manufacturer-family documentation for memory applications and general level detection. Four channels can monitor address, threshold, or control signals and produce open-collector enables or alarms. The device’s low input bias current is useful when the sensing source has high impedance, but system timing depends on the external pull-up resistance, wiring capacitance, and the family response time of approximately 1 µsec. Validate the complete timing budget in the target logic system.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для LM339D — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | LM339BD | LM339N | LM339DR | LM339DT | STMicroelectronics LM339D |
|---|---|---|---|---|---|---|
| Comparator Count | 4 | 4 | 4 | 4 | 4 | 4 |
| Output Type | Open-collector | Open-collector | Open-collector | Open-collector | Open-collector | Open-collector |
| Package | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC | 14-SO |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | STMicroelectronics |
Ключевые отличия
- Four independent comparator channels in one package (против LM2904D)
- Open-collector output enables wired logic and level adaptation (против LM339BD)
- Single or split supply support for flexible threshold circuits (против STMicroelectronics LM339D)
Заметки по проектированию
Do not treat the open-collector output as a push-pull logic output. Fit a pull-up resistor from each output to the voltage required by the receiving logic, and verify the resistor against output sink current, receiver input current, and required rise time. The LM339 family can interface with TTL, MOS, and CMOS-compatible circuits, but the correct pull-up voltage and load must be confirmed for the specific receiver.
Place supply bypass capacitors close to the comparator supply pins and return the capacitor ground through a short, low-impedance path. The verified family information identifies single or split supply operation, so the bypass arrangement should be checked against the selected wiring topology. If using split supplies, verify input common-mode and output voltage limits before enabling the circuit; the available evidence does not provide every operating-limit value.
Keep the four comparator input nets away from output pull-up loops and unrelated switching paths. Input bias current and offset voltage determine the error seen by high-impedance sensing nodes, while long traces add coupling and capacitance. Use short comparator traces, a local ground reference, and defined test points. Because exact pin names and package mapping were not included in the supplied evidence, verify the selected manufacturer pinout before PCB release.
Информация о соответствии
The supplied verified data does not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status for LM339D. Compliance should be confirmed using the selected manufacturer’s current documentation.
