SN74LVC1G14DBVR - Schmitt Inverter 1.65-5.5V SOT-23-5 | TI
部品番号: SN74LVC1G14DBVR ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $0.32 | $0.32 |
| 10 | $0.27 | $2.70 |
| 100 | $0.17 | $17.00 |
| 500 | $0.13 | $65.00 |
| 1,000 | $0.1 | $100.00 |
| 3,000 | $0.08 | $240.00 |
SN74LVC1G14DBVR 概要
A Schmitt-trigger inverter is a logic gate that uses positive feedback to create hysteresis between the positive-going threshold (VT+) and the negative-going threshold (VT-). This hysteresis (delta VT) prevents output chatter when the input hovers near the switching point, making the device tolerant of slow edges and noisy signals. Within the digital logic hierarchy, it is a fundamental inverter/combinational-logic building block used for buffering, waveform shaping, and signal conditioning.
Key features include a wide 1.65 V to 5.5 V supply range compatible with 1.8 V, 2.5 V, 3.3 V, and 5 V logic families, high output drive of +/-32 mA at 3.3 V, and low typical quiescent current of about 10 uA. Partial power-down (Ioff) protection keeps outputs high-impedance when VCC is off, enabling safe mixed-voltage and hot-insertion designs. ESD protection is rated 2 kV HBM per the TI datasheet.
Fabricated in TI's LVC CMOS technology, the device achieves propagation delays as low as 3.7 ns at 3.3 V with fully specified Schmitt thresholds across the supply range. It operates from -40 C to +125 C, suiting industrial and harsh-environment systems. NanoStar packaging keeps the footprint minimal for high-density boards.
Typical applications include debouncing mechanical switches, conditioning slow or noisy sensor signals, building relaxation oscillators, and level-tolerant glue logic between voltage domains. The wide supply range and strong drive make it a versatile single-gate choice.
Design tip: decouple VCC with a 0.1 uF ceramic capacitor placed close to the pin, and keep input traces short in high-speed sections to limit parasitic pickup. Prices as of 2026-08-30.
ドロップイン代替品: SN74LVC1G14DBVR — 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: SN74LVC1G14DBVR （同一形状・フットプリント） — 相違点: Package, Logic Function, Operating Temperature, Output Drive Current, Technology.
クイック比較ツール — 並列比較する代替部品を選択:
SN74LVC1G14MDBVREP
✅ ドロップイン📋 参考代替品（カタログ未掲載）
SN74LVC1G17DBVR
✅ ドロップイン✓ 在庫あり
$0.07 / 個
データシートを見る →SN74AHC1G14SE-7 equivalent
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
74LVC1G14GV,125
✅ ドロップイン📋 参考代替品（カタログ未掲載）
74LVC1G14W5-7
✅ ドロップイン📋 参考代替品（カタログ未掲載）
NC7S14M5X
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
SN74LVC1G14DBVR 最大定格＆電気的特性
| Logic Function | Inverter with Schmitt-trigger input (Y = NOT A) |
| Supply Voltage Range | 1.65 V to 5.5 V |
| Output Drive Current | +/-32 mA at 3.3 V |
| Propagation Delay | 3.7 ns typical at 3.3 V |
| 静止電流 | 10 uA typical |
| Schmitt Hysteresis | Delta VT specified across VCC range |
| 動作温度 | -40C to +125C |
| パッケージ | SOT-23-5 (DBV) NanoStar |
| 実装タイプ | Surface Mount |
| Ioff Protection | Partial power-down (outputs high-Z when VCC off) |
| ESD Protection | 2 kV HBM |
| Technology | LVC CMOS |
| チャネル数 | 1 |
| Input Type | Schmitt Trigger |
| RoHS ステータス | Compliant |
SN74LVC1G14DBVR ピン構成
| ピン 1 | A — Schmitt-trigger input |
| ピン 2 | GND — Ground |
| ピン 3 | Y — Inverted output (Y = NOT A) |
| ピン 4 | NC — No connect (internal tie-off per datasheet) |
| ピン 5 | VCC — Power supply, 1.65 V to 5.5 V |
主な用途
SN74LVC1G14DBVR の用途: 6 件s: Mechanical Switch Debouncing, Slow/Noisy Sensor Signal Conditioning, RC Relaxation Oscillator, Glue Logic in MCU/MPU Systems, Industrial Automation Inputs, Automotive Body and Control Modules.
Mechanical Switch Debouncing
Mechanical switches bounce for milliseconds as contacts settle, producing multiple false edges that corrupt counters and MCU inputs. The SN74LVC1G14DBVR's Schmitt input separates the positive-going threshold (VT+) from the negative-going threshold (VT-), so a slowly settling or RC-filtered switch voltage produces exactly one clean output edge instead of chatter. Use an RC (e.g., 10 kOhm / 100 nF) feeding the input; the +/-32 mA output drive at 3.3 V directly clocks microcontroller pins. The 1.65-5.5 V range lets the same design serve 1.8 V MCUs and 5 V industrial controllers.
おすすめ
Slow/Noisy Sensor Signal Conditioning
Photodiode, encoder, and proximity-sensor outputs often have slow edges or noise riding on the transition, which double-clocks ordinary CMOS gates. Feeding such signals into the SN74LVC1G14DBVR restores sharp logic levels: the Schmitt hysteresis (delta VT, fully specified across 1.65-5.5 V) rejects ripple smaller than the hysteresis window, while the 3.7 ns typical propagation delay at 3.3 V preserves timing accuracy in encoder counting. Its Ioff partial power-down protection allows the sensor domain to be unpowered while the logic rail stays live, common in modular sensor boards.
おすすめ
RC Relaxation Oscillator
A single Schmitt inverter plus one resistor and one capacitor forms a compact relaxation oscillator: the capacitor charges/discharges between VT+ and VT-, with frequency set approximately by f = 1/(RC x k) where k depends on threshold ratios. The SN74LVC1G14DBVR suits this role because its thresholds are tightly specified across the 1.65-5.5 V supply, giving predictable frequency, and its 10 uA typical quiescent current keeps total oscillator consumption low for battery products. Use for clock generation, watchdog heartbeats, or LED blinkers where crystal accuracy is unnecessary.
おすすめ
Glue Logic in MCU/MPU Systems
Board designers use the SN74LVC1G14DBVR for polarity inversion (active-low resets, enables, chip-selects) and level-tolerant buffering in microcontroller and processor systems. The 1.65-5.5 V range lets it bridge 1.8 V MPU I/O and 3.3 V or 5 V peripherals, and Ioff protection keeps outputs high-impedance during partial power-down for safe hot-insertion and mixed-rail sequencing. The 3.7 ns delay at 3.3 V adds negligible timing margin cost. Its SOT-23-5 footprint fits dense boards around TI Sitara and MSP430 processors.
おすすめ
Industrial Automation Inputs
Factory I/O modules receive signals from limit switches, relays, and PLC outputs over long cables that pick up noise and arrive with slow edges. The SN74LVC1G14DBVR conditions these lines: Schmitt hysteresis rejects ground noise, the -40C to +125C range covers cabinet temperatures, and 2 kV HBM ESD robustness handles handling and field stress. The +/-32 mA drive can directly drive optocoupler or isolator LEDs at 3.3-5 V. The same footprint supports second sources, easing industrial BOM qualification.
おすすめ
Automotive Body and Control Modules
For automotive designs, the same function is available in the qualified SN74LVC1G14QDBVRQ1, and the commercial SN74LVC1G14DBVR serves in non-qualified modules, test equipment, and prototyping. Schmitt inputs clean up noisy harness signals such as door-switch and lamp-sense lines, while the 5 V tolerance and 1.65-5.5 V operation span legacy 5 V body electronics and newer 3.3 V domains. Wide temperature operation (-40C to +125C) suits engine-bay-adjacent and exterior lighting modules.
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: SN74LVC1G14DBVR — 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 | SN74LVC1G14MDBVREP | SN74LVC1G17DBVR | 74LVC1G14GV,125 | NC7S14M5X |
|---|---|---|---|---|---|
| Package | SOT-23-5 (DBV) | SOT-23-5 (DBV) - same | SOT-23-5 (DBV) - same | SOT-23-5 - same | SOT-23-5 - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | NXP Semiconductors | onsemi |
| Logic Function | Inverting Schmitt (Y = NOT A) | Inverting Schmitt - same | Non-inverting Schmitt (Y = A) | Inverting Schmitt - same | Inverting Schmitt - same |
| Supply Voltage Range | 1.65 V to 5.5 V | 1.65 V to 5.5 V | 1.65 V to 5.5 V | 1.65 V to 5.5 V | 2.0 V to 5.5 V |
| Output Drive | +/-32 mA at 3.3 V | +/-32 mA at 3.3 V | +/-32 mA at 3.3 V | +/-32 mA class | +/-24 mA class |
| Automotive/EP Grade | No (commercial) | Yes (TI EP) | No | No | No |
主な差別化要因
- Widest supply range in the Schmitt single-gate class （vs NC7S14M5X)
- High-reliability EP variant on identical die （vs SN74LVC1G14MDBVREP)
- Ioff partial power-down protection （vs 74LVC1G14W5-7 (verify per its datasheet))
設計ノート
Place a 0.1 uF ceramic decoupling capacitor within 2-3 mm of the VCC (pin 5) to GND (pin 2) path. Although a single gate draws only about 10 uA quiescent, the +/-32 mA output transitions create fast current edges; local decoupling prevents supply bounce that could shift the Schmitt thresholds mid-transition.
Keep the input trace short and avoid routing it adjacent to clock lines. A Schmitt input is more noise-tolerant than a standard CMOS input, but hysteresis only rejects noise smaller than delta VT; slow high-impedance nodes with long traces can still pick up coupled edges exceeding the window. Add a small RC (1 kOhm/100 pF) at very noisy inputs.
Do not assume input tolerance beyond VCC: unlike some TI families with overvoltage-tolerant inputs, drive the A pin only within the rails (0 V to VCC). Also, unused NC pin 4 should be left floating or tied to GND per datasheet guidance - do not use it as a second supply pin. For oscillators, verify actual VT+/VT- limits at your supply from the datasheet tables, since frequency scales with threshold ratio.
コンプライアンス情報
RoHS compliant per DigiKey/TI product listings. AEC-Q100 qualified variant available separately as SN74LVC1G14QDBVRQ1. Other compliance fields not stated in provided data.
