SN74LVC1G14DBVR - Schmitt Inverter 1.65-5.5V SOT-23-5 | TI
料号： SN74LVC1G14DBVR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 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 概述
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.
直接替换替代料： SN74LVC1G14DBVR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： SN74LVC1G14DBVR （相同外形与封装尺寸） ——差异在于 Package, Logic Function, Operating Temperature, Output Drive Current, Technology.
快速对比工具——选择替代料号进行并排对比：
SN74LVC1G14MDBVREP
✅ 直接替换📋 参考替代料（不在目录中）
SN74LVC1G17DBVR
✅ 直接替换✓ 有现货
$0.07 / 个
查看数据手册 →SN74AHC1G14SE-7 equivalent
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
74LVC1G14GV,125
✅ 直接替换📋 参考替代料（不在目录中）
74LVC1G14W5-7
✅ 直接替换📋 参考替代料（不在目录中）
NC7S14M5X
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
SN74LVC1G14DBVR 最大额定值与电气特性
| 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 |
| 静态电流 | 10 uA typical |
| Schmitt Hysteresis | Delta VT specified across VCC range |
| 工作温度 | -40C to +125C |
| 封装 | SOT-23-5 (DBV) NanoStar |
| 安装类型 | Surface Mount |
| Ioff Protection | Partial power-down (outputs high-Z when VCC off) |
| ESD Protection | 2 kV HBM |
| Technology | LVC CMOS |
| 通道数 | 1 |
| Input Type | Schmitt Trigger |
| RoHS 状态 | Compliant |
SN74LVC1G14DBVR 引脚配置
| 引脚 1 | A — Schmitt-trigger input |
| 引脚 2 | GND — Ground |
| 引脚 3 | Y — Inverted output (Y = NOT A) |
| 引脚 4 | NC — No connect (internal tie-off per datasheet) |
| 引脚 5 | VCC — Power supply, 1.65 V to 5.5 V |
典型应用
SN74LVC1G14DBVR 适用于 6 应用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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： SN74LVC1G14DBVR ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Widest supply range in the Schmitt single-gate class （对比 NC7S14M5X)
- High-reliability EP variant on identical die （对比 SN74LVC1G14MDBVREP)
- Ioff partial power-down protection （对比 74LVC1G14W5-7 (verify per its datasheet))
设计说明
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.
合规信息
RoHS compliant per DigiKey/TI product listings. AEC-Q100 qualified variant available separately as SN74LVC1G14QDBVRQ1. Other compliance fields not stated in provided data.
