74HC2G17GW - Dual Non-Inverting Schmitt Trigger, 6-TSSOP | Nexperia
MPN: 74HC2G17GW ✓ Hoạt động74HC2G17GW Tóm tắt
A Schmitt trigger is a comparator-style input stage with two distinct switching thresholds - a higher threshold (VT+) for the rising edge and a lower threshold (VT-) for the falling edge. The hysteresis between these thresholds (typically 1.0 V at 5 V VCC for the 74HC2G17) rejects noise, ringing, and slow edges, producing clean digital transitions where a standard CMOS gate would oscillate. Within the broader taxonomy, this device is a logic buffer - a sub-category of interface ICs that sits between drivers and receivers, all of which fall under the umbrella of standard logic ICs and ultimately digital semiconductors.
Key features include CMOS Schmitt-trigger inputs with input hysteresis, push-pull complementary outputs capable of sourcing and sinking ±5.2 mA, a maximum quiescent current in the microamp range, and ESD protection on all inputs. Inputs include clamp diodes that enable the use of current-limiting series resistors when interfacing to voltages above VCC, simplifying mixed-voltage designs. The device is specified over the -40 °C to +125 °C automotive/industrial temperature range.
The 74HC2G17GW uses a high-speed CMOS Si-gate process that delivers TTL-compatible logic levels on the HC version and true TTL levels on the HCT variant (74HCT2G17GW). The push-pull output stage eliminates the need for external pull-up resistors and avoids the static power dissipation of open-drain alternatives. With two independent buffers in a 6-pin package, the part is a compact building block for signal conditioning, line receivers, and oscillator circuits.
Typical applications include debouncing mechanical switches and push-buttons, conditioning slow analog signals before they reach a microcontroller, square-wave relaxation oscillators using an RC network, and rising-edge/pulse shaping in industrial control and automotive body electronics. The wide supply range and TTL-compatible thresholds make it a flexible interface between legacy 5 V logic and modern 3.3 V microcontrollers.
When designing with this device, place a 0.1 µF decoupling capacitor as close as possible to the VCC pin and ensure that input rise/fall times remain slow enough that the Schmitt hysteresis is meaningfully larger than the input noise. Inputs that exceed VCC by more than one diode drop (~0.7 V) must be current-limited to within the absolute maximum rating.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single reference for footprint-compatible parts and selection trade-offs.
Bộ thay thế dễ dàng lắp đặt cho 74HC2G17GW — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
74HCT2G17GW,125
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
74HC2G17GW,125
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
74HC2G17GW-G
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
SN74LVC2G17DCKR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC74HC2G17
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
74HC2G17GW-Q100
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
74HC2G17GW Tỷ lệ tối đa & tính chất điện
| Logic Type | Schmitt Trigger Buffer |
| Number of Elements | 2 |
| Number of Bits per Element | 1 |
| Kiểu đầu ra | Push-Pull |
| Polarity | Non-Inverting |
| Supply Voltage (VCC) | 2.0 V to 6.0 V |
| Logic Switching Levels | CMOS |
| Output Drive Capability | ±5.2 mA |
| Maximum Frequency (fmax) | 36 MHz |
| Number of Bits | 2 |
| Power Dissipation Considerations | Low |
| Operating Temperature (Tamb) | -40 °C to +125 °C |
| Input Clamp Diodes | Yes |
| Hộp | TSSOP-6 (SOT363 / SC-88) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 1 (per JEDEC J-STD-020) |
Cấu hình chân 74HC2G17GW
| Chân 1 | 1A — Data input, channel 1 (Schmitt trigger) |
| Chân 2 | GND — Ground (0 V) |
| Chân 3 | 2A — Data input, channel 2 (Schmitt trigger) |
| Chân 4 | 2Y — Data output, channel 2 (push-pull) |
| Chân 5 | VCC — Supply voltage (2.0 V to 6.0 V) |
| Chân 6 | 1Y — Data output, channel 1 (push-pull) |
Ứng dụng tiêu biểu
74HC2G17GW phù hợp cho 6 Áp dụngs: Mechanical Switch Debouncing, Signal Conditioning for Slow Analog Edges, Relaxation Oscillator / Square-Wave Generator, Industrial Control Line Receiver, Automotive Body Electronics, Mixed-Voltage Level Translation.
Mechanical Switch Debouncing
The 74HC2G17GW's Schmitt-trigger inputs with around 1.0 V hysteresis at 5 V VCC make it ideal for debouncing mechanical switches, push-buttons, and rotary encoders. Placing a 10 kΩ pull-up and the 74HC2G17GW between the switch and a microcontroller GPIO produces a clean logic edge free of contact bounce, with the device's 36 MHz maximum frequency easily handling millisecond-scale debounce events.
Được đề xuất
Signal Conditioning for Slow Analog Edges
Slowly rising signals from sensors, RC networks, or comparator outputs often violate the maximum rise-time spec of standard CMOS gates, causing metastability and oscillation. The 74HC2G17GW converts these slow edges into sharply defined transitions with around 10 ns propagation delay at 5 V VCC, and its 2.0 V to 6.0 V supply range allows direct interfacing with both 3.3 V microcontrollers and 5 V analog front-ends.
Được đề xuất
Relaxation Oscillator / Square-Wave Generator
A single 74HC2G17GW channel forms a compact relaxation oscillator by adding an external resistor from output to input and a capacitor from input to ground, generating a square wave at approximately f = 1 / (0.69 × R × C). The Schmitt-trigger hysteresis keeps the output transitions clean and symmetric even with component tolerances, and the second buffer can be used as a buffered output to drive a load without disturbing the timing network.
Được đề xuất
Industrial Control Line Receiver
In noisy industrial environments, long cable runs pick up EMI that easily confuses standard CMOS receivers. The 74HC2G17GW's Schmitt-trigger inputs reject this noise with typical 1.0 V hysteresis at 5 V VCC, while its ±5.2 mA push-pull drive delivers a robust 5 V CMOS signal to downstream logic or optocouplers across -40 °C to +125 °C industrial temperature range.
Được đề xuất
Automotive Body Electronics
Automotive body controllers routinely debounce door switches, seat-occupancy sensors, and HVAC controls where the 74HC2G17GW-Q100 AEC-Q100 qualified variant provides the same TSSOP-6 footprint and 2.0 V to 6.0 V supply tolerance needed for 12 V battery environments. The integrated input clamp diodes allow current-limited sensing of voltages above VCC, supporting direct wiring to automotive load drivers.
Được đề xuất
Mixed-Voltage Level Translation
The 74HC2G17GW's 2.0 V to 6.0 V supply range and input clamp diodes enable simple unidirectional level translation between 5 V and 3.3 V logic domains by running the device at the lower supply and current-limiting the higher-voltage input through a series resistor. While dedicated level shifters like the TXS0108E are preferred for high-speed buses, the 74HC2G17GW is a low-cost, low-pin-count solution for control signals.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho 74HC2G17GW — 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 | 74HCT2G17GW,125 | 74HC2G17GW,125 | 74HC2G17GW-G | SN74LVC2G17DCKR | MC74HC2G17 |
|---|---|---|---|---|---|---|
| Brand | Nexperia | Nexperia | Nexperia | Nexperia | Texas Instruments | onsemi |
| Package | TSSOP-6 (SOT363 / SC-88) | TSSOP-6 (SOT363) - same | TSSOP-6 (SOT363) - same | TSSOP-6 (SOT363) - same | TSSOP-6 (DCK) - same footprint | TSSOP-6 - same |
| Supply Voltage (VCC) | 2.0 V to 6.0 V | 4.5 V to 5.5 V | 2.0 V to 6.0 V | 2.0 V to 6.0 V | 1.65 V to 5.5 V | 2.0 V to 6.0 V |
| Logic Switching Levels | CMOS | TTL | CMOS | CMOS | LVTTL | CMOS |
| Output Drive Capability | ±5.2 mA | ±4 mA | ±5.2 mA | ±5.2 mA | ±24 mA | ±5.2 mA |
| Maximum Frequency (fmax) | 36 MHz | 36 MHz | 36 MHz | 36 MHz | 150 MHz | 36 MHz |
| Operating Temperature | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -55 °C to +125 °C |
| Automotive Grade (AEC-Q100) | No | No | No | No | No | No |
Bảo phân biệt quan trọng
- Wide 2.0 V to 6.0 V supply range covers both 3.3 V and 5 V designs in a single part (vs74HCT2G17GW,125)
- Schmitt-trigger hysteresis around 1.0 V at 5 V VCC rejects noise on slow or ringing edges (vsMC74ACT32DR2G)
- Compact 6-pin TSSOP integrates two independent buffers with clamp-diode protection (vsSN74LVC2G17DCKR)
Ghi chú thiết kế
Place a 0.1 µF ceramic decoupling capacitor (X7R or X5R) within 2 mm of the VCC pin (pin 5) to suppress supply transients caused by simultaneous push-pull output switching. For designs with two buffers toggling at high speed, adding a parallel 1 nF or 10 nF capacitor can further reduce high-frequency supply ringing, but the 0.1 µF must remain closest to the device.
Keep the GND pin (pin 2) connection short and direct to the ground plane, ideally with a via placed immediately adjacent to the pin pad. The two input pins (1A, 2A) carry high-impedance analog-like signals; route them away from fast-switching outputs and clock traces to avoid capacitive coupling that could reduce effective hysteresis.
Inputs that exceed VCC by more than ~0.7 V forward-bias the integrated clamp diodes and must be current-limited with an external series resistor to stay within the absolute maximum input current rating per pin. Do not assume unlimited over-voltage tolerance - calculate R ≥ (VIN_max - VCC) / I_input_max and verify the resulting rise-time remains compatible with downstream logic.
Thông tin tuân thủ
RoHS compliant per Nexperia product page. The 74HC2G17GW-Q100 variant is the AEC-Q100 qualified version for automotive designs.
