LM339D - 4-Comparator Open-Collector IC | Texas Instruments
部品番号: LM339D ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
LM339D 概要
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.
ドロップイン代替品: LM339D — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: LM339D （同一形状・フットプリント） — 相違点: Package, Comparator Type, Logic Compatibility, Mounting Type, Response Time.
クイック比較ツール — 並列比較する代替部品を選択:
LM339BD
✅ ドロップイン📋 参考代替品（カタログ未掲載）
LM339N
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$0.38 / 個
データシートを見る →LM339DR
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$0.15 / 個
データシートを見る →LM339DT
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
LM339D
✓ 在庫あり
価格はお問い合わせください
データシートを見る →LM339D 最大定格＆電気的特性
| Comparator Count | 4 |
| Product Type | General-purpose differential voltage comparator |
| 出力タイプ | 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 |
| 電源電流 | 200 µA per comparator |
| Response Time | 1 µsec |
| ESD Rating HBM | 2 kV |
| パッケージ | 14-pin SOIC |
| Logic Compatibility | TTL, MOS, and CMOS-compatible output |
LM339D 14-pin soic ピン配置ガイド
LM339D (14-pin soic パッケージ) のピン配置。 このアナログコンポーネントは、入力、出力、および電源ピンを備えています。オフセットナル、補償、イネーブルピンの設定については、メーカーのデータシートを参照してください。信号調整やアンプ回路に最適です。
詳細なピン配置データはありません: LM339D.
詳細は データシート をご参照ください。
主な用途
LM339D の用途: 6 件s: 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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: LM339D — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | 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 |
主な差別化要因
- Four independent comparator channels in one package （vs LM2904D)
- Open-collector output enables wired logic and level adaptation （vs LM339BD)
- Single or split supply support for flexible threshold circuits （vs STMicroelectronics LM339D)
設計ノート
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.
コンプライアンス情報
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.
