74AHC1G17GVH - Single Schmitt-Trigger Buffer SC-74A | Nexperia
MPN: 74AHC1G17GVH ✓ Hoạt động74AHC1G17GVH Tóm tắt
A Schmitt-trigger buffer is a single-input, single-output logic gate whose input switching threshold includes deliberate hysteresis — the input trips at a higher voltage on the rising edge than on the falling edge. This suppresses noise-induced oscillation and produces a single, clean output edge even when the input signal is slow, noisy, or has significant ringing. Buffers (as opposed to inverters) simply re-create the input logic level with greater drive strength, isolating a sensitive source from a noisy load, or providing level translation between two voltage domains. The 74AHC1G17 sits within the logic IC hierarchy: logic gate -> combinational logic -> standard logic IC -> semiconductor IC.
Key features of the 74AHC1G17GVH include ±8 mA balanced output drive at 5 V, low quiescent current, fast propagation delay, and overvoltage-tolerant inputs. The SC-74A package measures only 2.9 x 1.5 x 1.0 mm with a gull-wing lead frame compatible with standard SMD assembly. The 1G family designation indicates a single-gate part optimized for footprint-sensitive designs where multi-gate packages would waste board area.
Typical applications include signal conditioning in industrial control, button/keyboard debouncing, level shifting between 3.3 V and 5 V rails, clock/pulse shaping in microcontroller I/O expansion, and general-purpose logic glue in mixed-signal systems. The wide 2.0-5.5 V operating range and CMOS/TTL input flexibility make it a versatile building block across consumer, industrial, and automotive subsystems. When designing with this part, ensure input edges are not faster than the datasheet-specified rise/fall limits and respect the absolute maximum VCC of 6 V to avoid latch-up. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho 74AHC1G17GVH — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với 74AHC1G17GVH (cùng hình factor và footprint) — khác nhau ở MSL Level, Output Current (IOH/IOL), Output Type, Package, Package Size.
74AHC1G17GW
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
74AHCT1G17GV
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
74AHC1G17SE-7
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
74AHC1G08SE-7
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →74AHC1G17GVH Tỷ lệ tối đa & tính chất điện
| Logic Family | AHC (Advanced High-speed CMOS) |
| Logic Function | Single Schmitt-Trigger Buffer (non-inverting) |
| Number of Elements | 1 |
| Number of Bits per Element | 1 |
| Supply Voltage (VCC) | 2.0 V to 5.5 V |
| Input Type | Schmitt-Trigger |
| Kiểu đầu ra | Push-Pull (CMOS) |
| Output Current (IOH/IOL) | ±8 mA at VCC = 5 V |
| Input Overvoltage Tolerance | Up to 5.5 V regardless of VCC |
| Nhiệt độ hoạt động | -40 C to +125 C |
| Hộp | SC-74A (SOT-753 / TSOP-5) |
| Package Size | 2.9 mm x 1.5 mm x 1.0 mm |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 1 (Unlimited, per PartGenie summary) |
| Trạng thái RoHS | ROHS3 Compliant (per PartGenie) |
| REACH Status | REACH Unaffected (per PartGenie) |
| Polarity | Non-inverting |
Cấu hình chân 74AHC1G17GVH
| Chân 1 | NC — Not connected internally; pin retained for package mechanical stability per datasheet |
| Chân 2 | A — Data input (Schmitt-trigger) |
| Chân 3 | GND — Ground (0 V) |
| Chân 4 | Y — Data output (non-inverting buffer output) |
| Chân 5 | VCC — Supply voltage (2.0 V to 5.5 V) |
Ứng dụng tiêu biểu
74AHC1G17GVH phù hợp cho 6 Áp dụngs: Mechanical Button / Switch Debouncing, 3.3 V to 5 V Logic Level Translation, Clock / Pulse Signal Conditioning, Microcontroller I/O Expansion and Isolation, Reset and Watchdog Signal Conditioning, Industrial Sensor Signal Buffering.
Mechanical Button / Switch Debouncing
The 74AHC1G17GVH is widely used to debounce mechanical push-buttons, toggle switches, and rotary-encoder contacts in industrial HMIs and consumer keypads. The Schmitt-trigger input hysteresis eliminates the rapid on/off chatter that mechanical contacts produce during closure, producing a single clean edge at the output. With VCC = 3.3 V or 5 V and ±8 mA output drive, it directly drives a microcontroller GPIO without additional buffering. Pair the input with a 10 kΩ / 100 nF RC network for software-free hardware debouncing in noisy factory environments.
Được đề xuất
3.3 V to 5 V Logic Level Translation
The 74AHC1G17GVH's overvoltage-tolerant inputs (tolerant to 5.5 V regardless of VCC) make it a compact, single-bit level translator between a 3.3 V microcontroller and a 5 V peripheral. Power the part from the 3.3 V rail; drive inputs from the 5 V peripheral; outputs will swing rail-to-rail on the 3.3 V domain. This avoids the cost and complexity of dedicated translator ICs when only a handful of signals need shifting in mixed-voltage designs, such as 5 V sensors feeding a low-voltage host MCU on a factory sensor board.
Được đề xuất
Clock / Pulse Signal Conditioning
In mixed-signal and timing-critical circuits, the 74AHC1G17GVH cleans up slow or ringing clock edges from long PCB traces, opto-isolators, or RC-coupled paths. The Schmitt-trigger input provides well-defined switching thresholds, and the push-pull CMOS output delivers sharp edges capable of driving 50 pF loads at 5 V within the datasheet's propagation delay. Use it to regenerate a degraded clock from a sensor, isolator, or RC oscillator before feeding the signal to a counter or PLL. The 2.0-5.5 V VCC range covers all common logic rails.
Được đề xuất
Microcontroller I/O Expansion and Isolation
Place a 74AHC1G17GVH between a sensitive MCU output and a noisy load — such as a long cable, relay driver input, or motor-driver logic pin — to buffer and isolate the MCU from back-EMF and ESD events. The ±8 mA balanced output drive at 5 V is sufficient for short PCB traces and signal-path buffering. The part's small SC-74A footprint and single-gate design let engineers add isolation in tight board areas without dedicating a multi-gate IC that consumes more board space and quiescent current.
Được đề xuất
Reset and Watchdog Signal Conditioning
Use the 74AHC1G17GVH to clean up a manual reset push-button, watchdog timer strobe, or supervisory circuit output before it reaches a processor's reset pin. The Schmitt-trigger action rejects the contact bounce of a front-panel reset button and the small glitches on a supervisory reset line, ensuring the processor only sees a single, clean reset pulse. Operating from the same 3.3 V or 5 V rail as the supervisor, the part integrates easily into any standard supervisory topology in industrial controllers.
Được đề xuất
Industrial Sensor Signal Buffering
In industrial sensor front-ends — proximity sensors, Hall-effect devices, photo-interrupters — the 74AHC1G17GVH buffers and shapes the sensor's open-collector or analog-conditioned output before feeding it to a PLC digital input or MCU counter. The Schmitt-trigger input tolerates slow 10/90 % edges and rejects the high-frequency noise common on long factory-floor cable runs. The wide -40 C to +125 C operating range ensures reliability in unconditioned industrial enclosures, and the SC-74A package is rated for standard SMD assembly.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho 74AHC1G17GVH — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 74AHC1G17GW | 74AHCT1G17GV | 74AHC1G17SE-7 |
|---|---|---|---|---|
| Package | SC-74A (SOT-753) | SC-74A (SOT-753) - same | SC-74A (SOT-753) - same | SOT-353 (SC-88A) - different body |
| Brand | Nexperia | Nexperia | Nexperia | Diodes Incorporated |
| Supply Voltage (VCC) | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V (TTL input) | 2.0 V to 5.5 V |
| Input Type | Schmitt-Trigger (CMOS) | Schmitt-Trigger (CMOS) | Schmitt-Trigger (TTL) | Schmitt-Trigger (CMOS) |
| Output Drive | ±8 mA at 5 V | ±8 mA at 5 V | ±8 mA at 5 V | ±8 mA at 5 V |
| Logic Function | Non-Inverting Buffer | Non-Inverting Buffer | Non-Inverting Buffer | Non-Inverting Buffer |
| Overvoltage-Tolerant Inputs | Yes (to 5.5 V) | Yes (to 5.5 V) | Yes (to 5.5 V) | Yes (typical for AHC family) |
| Operating Temperature | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C (typical) |
| RoHS Compliance | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | RoHS Compliant (typical) |
Bảo phân biệt quan trọng
- 5 V-tolerant inputs when operated at lower VCC enables single-component level translation (vs74AHCT1G17GV)
- Smallest 5-pin footprint in the AHC1G17 family (vs74AHC1G17SE-7 (SOT-353/SC-88A))
- Same-brand suffix options for tape orientation without redesign (vs74AHC1G17GW)
Ghi chú thiết kế
Place a 0.1 µF decoupling capacitor as close as possible to the VCC pin (pin 5) of the SC-74A package. For designs switching more than ~10 MHz or driving long PCB traces, add a bulk 1 µF to 10 µF capacitor on the same VCC net. Keep input traces short and away from switching noise sources; the Schmitt-trigger input will tolerate noise, but excessive ringing can exceed the absolute maximum input voltage of 5.5 V relative to GND.
The 74AHC1G17GVH draws very low quiescent current (typically a few µA), but the dynamic supply current scales with output load capacitance and frequency — estimate ICC_dynamic = CL × VCC × f × 10^-3 mA per Nexperia datasheet guidance. At 5 V with 50 pF load at 10 MHz, expect ~25 µA dynamic current. The overvoltage-tolerant input feature allows inputs to be driven above VCC up to 5.5 V without current paths, simplifying power-sequencing designs.
Do not exceed VCC = 6 V absolute maximum — latch-up can permanently damage the part. Pin 1 is sometimes marked NC for mechanical stability, but some Nexperia datasheet revisions use pin 1 as a no-connect or as a second GND in related 1Gxx families — verify against the package marking on the datasheet, not on a generic 1G family reference. For level translation, never drive the output above VCC; the push-pull output is not 5 V-tolerant when VCC = 3.3 V.
Thông tin tuân thủ
ROHS3 Compliant and REACH Unaffected per PartGenie summary; AEC-Q100 qualification status not stated by Nexperia in the verified web data — choose a Q-100 qualified variant (e.g., SN74AHC1G17QDRQ1) for automotive designs.
