LM-555N - Single 555 Timer, 8-PDIP | Texas Instruments
部品番号: LM-555N ✓ 生産中LM-555N 概要
What is a 555 timer? A 555 timer is a programmable timer and oscillator integrated circuit used to generate delayed pulses, produce periodic waveforms, debounce inputs, or control relays and indicators. Its internal blocks typically include a voltage reference, comparators, a flip-flop, and a high-current output stage. In astable operation, external resistors and a capacitor set the oscillation period; in monostable operation, an external timing capacitor sets the output pulse width.
The verified Harris product description identifies the LM555N for timing-delay and oscillator applications in commercial, industrial, and military equipment. The verified product listing calls it a “555 Type, Timer/Oscillator (Single) IC” and specifies an 8-PDIP package. The official TI product page describes the LM555 family as a highly stable 555 timer and provides family-level documentation, but the supplied material does not expose the exact LM-555N datasheet values.
Because the target MPN includes a hyphen while the verified distributor listing uses LM555N, engineers should confirm the exact package, suffix, manufacturer, and electrical limits against the applicable manufacturer documentation before substituting or releasing a production design. The verified result also shows a distributor listing from Rochester Electronics under the Harris Corporation name; Harris Corporation is not in the supplied Manufacturer Reference, so the brand field follows the target context and the official TI source uses Texas Instruments.
Typical uses include pulse generation, delay circuits, oscillators, indicator flashing, switch debouncing, and simple industrial control logic. Because the exact pinout, package details, and ratings were not included in the verified data, this page does not infer those values. Check the original LM-555N datasheet and the manufacturer’s current documentation before layout or purchase.
ドロップイン代替品: LM-555N — 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: LM-555N （同一形状・フットプリント） — 相違点: Mounting Type, Output Current, Package, Product Type.
LM555N
✅ ドロップイン📋 参考代替品（カタログ未掲載）
NE555N
✅ ドロップイン📋 参考代替品（カタログ未掲載）
NE555P
✅ ドロップイン価格はお問い合わせください
データシートを見る →NE555P
✅ ドロップイン価格はお問い合わせください
データシートを見る →NE555DR
✅ ドロップイン価格はお問い合わせください
データシートを見る →LM-555N 仕様
| Product Type | 555-type timer/oscillator integrated circuit |
| Timer Configuration | Single timer |
| Verified Package | 8-PDIP |
| Package Type | PDIP |
| Verified Functional Category | Timer/Oscillator (Single) IC |
| Application Category | Timing delays and oscillator applications |
| Supported Equipment Categories | Commercial, industrial, and military equipment |
| 実装タイプ | Through-hole |
| Manufacturer Documentation | LM555 product page and family datasheet are available through Texas Instruments |
LM-555N pdip ピン配置ガイド
LM-555N (pdip パッケージ) のピン配置。 ピン番号、機能、接続図はメーカーのデータシートで定義されています。正確なフットプリントとはんだ付けのガイドラインについては、データシートを参照してください。
詳細なピン配置データはありません: LM-555N.
詳細は データシート をご参照ください。
主な用途
LM-555N の用途: 6 件s: Industrial Delay and Retrigger Timing, Astable Oscillator and Pulse Generator, Switch Debounce and Control Logic, Indicator and Warning Circuit, Test and Measurement Trigger Circuit, Relay and Actuator Timing.
Industrial Delay and Retrigger Timing
The LM-555N is suited to industrial delay circuits because the verified description explicitly identifies timing-delay applications for commercial, industrial, and military equipment. In a monostable configuration, an external timing network can hold the output in a defined state until a trigger event is received, then produce a controlled output pulse. The verified data confirms the 8-PDIP package and single timer/oscillator function, but it does not provide the exact threshold voltage, timing tolerance, or supply limits. Engineers should therefore select external resistors and capacitors from the exact LM-555N datasheet, account for component tolerances, and validate pulse width across temperature and supply variation before deploying the circuit in a production control system.
おすすめ
Astable Oscillator and Pulse Generator
The LM-555N can implement an astable oscillator or pulse generator using external timing resistors and a capacitor, consistent with the verified distributor description of a 555 Type Timer/Oscillator IC. The oscillator frequency is set by the timing network and is subject to the exact device thresholds and output behavior, which are not supplied here. Use the original manufacturer datasheet for the timing equation, maximum frequency, duty-cycle limits, and output-drive limits. The 8-PDIP package supports straightforward through-hole prototyping and repair, while PCB designers should provide adequate pin clearance and a stable ground return around the timing components.
おすすめ
Switch Debounce and Control Logic
The LM-555N is applicable to switch-debounce and basic control logic because the verified source identifies timer functionality for delay and oscillator service. A monostable or Schmitt-trigger-style implementation can help prevent a mechanical contact from producing repeated control pulses, although the exact debounce topology depends on the required response time. The supplied data does not specify trigger thresholds, reset behavior, or output polarity, so engineers must verify those details in the exact LM-555N datasheet. Keep the timing capacitor close to the device, use a suitable resistor network, and test across the full mechanical switch temperature and wear range.
おすすめ
Indicator and Warning Circuit
The LM-555N can drive simple periodic warning, flashing, or indicator circuits when the load current and duty cycle are within the exact output ratings of the selected device. The verified description confirms oscillator use, but it does not provide the LM-555N sink/source current limits or output drive architecture. Before connecting LEDs, relays, or other loads, check the exact datasheet and add a transistor or driver stage when the required current exceeds the verified capability. The through-hole 8-PDIP format is useful for panel wiring and serviceable assemblies, but component spacing and current-loop layout remain important.
おすすめ
Test and Measurement Trigger Circuit
The LM-555N is suitable for laboratory and test systems that need a repeatable pulse, delayed trigger, or low-complexity oscillator. The verified Harris description names timing-delay and oscillator applications in commercial, industrial, and military equipment, which supports use as a building block in external test fixtures. Exact timing accuracy, supply range, and output performance are not present in the supplied data, so the timer should not be treated as a precision reference without further characterization. Use short timing paths, a stable bypass capacitor, and a defined reset strategy to reduce supply and switching disturbances on the test bench.
おすすめ
Relay and Actuator Timing
The LM-555N can provide the timing element for relay or actuator control when the output stage is selected to match the coil voltage and current. The verified timer and oscillator description supports delayed pulse generation, but no relay-drive ratings are supplied for the exact LM-555N. Engineers should use the original datasheet to confirm output current, saturation behavior, reset timing, and supply limits, then add a transistor driver and flyback protection for inductive loads. The 8-PDIP package is straightforward to socket during maintenance, but production designs should include adequate clearance around the package and isolate high-current switching paths from timing and control wiring.
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: LM-555N — 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 | LM555N | NE555N | NE555P | NE555P | NE555 |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 8-PDIP | 8-PDIP - same verified listing format | 8-PDIP - same general format; exact suffix verification unavailable | 8-PDIP - same general format; exact suffix verification unavailable | 8-PDIP - same general format; exact suffix verification unavailable | 8-PDIP - same general format; exact suffix verification unavailable |
| Product Function | 555-type timer/oscillator | 555-type timer/oscillator | General 555 timer function; exact data not supplied | General 555 timer function; exact data not supplied | General 555 timer function; exact data not supplied | General 555 timer function; exact data not supplied |
主な差別化要因
- Exact verified product listing （vs NE555N)
- Verified application description （vs NE555P)
- Source transparency （vs NE555)
設計ノート
For an 8-PDIP timer layout, reserve the verified package footprint and provide adequate through-hole clearance around all eight leads. Keep the timing resistor network and timing capacitor close to the relevant device pins to reduce parasitic resistance and capacitance, and route the return path directly to the device ground. Do not finalize the footprint until the exact LM-555N mechanical drawing and pin numbering have been checked.
Add a local supply bypass capacitor and verify the exact LM-555N supply-voltage limits from the manufacturer datasheet before connecting the device to a control rail. The supplied search results do not provide the minimum operating voltage, quiescent current, or output current, so neither the rail nor the load should be selected from general 555-family assumptions. Confirm startup behavior, reset release, and ground current using the exact electrical characterization.
Do not substitute a generic NE555, TLC555, or other 555-family device solely because the timer function is similar. Confirm the package pinout, trigger priority, threshold levels, discharge pin behavior, output polarity, supply range, frequency limits, and temperature ratings for the exact replacement. Cross-reference search results can identify candidates, but they are not manufacturer approval or proof that a part is drop-in compatible.
コンプライアンス情報
The supplied verified results identify timer and oscillator applications but do not provide compliance declarations for the exact LM-555N ordering code. Compliance status must be confirmed from the current manufacturer product documentation or supplier declaration.
