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74HC14D / SN74HC14DR Hex Schmitt Trigger Inverter — SOP-14 SMD, 2–6V (10-Pack)
74HC14D / SN74HC14DR Hex Schmitt Trigger Inverter SOP-14 SMD, 2–6V (10-Pack)
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74HC14D / SN74HC14DR — Hex Schmitt Trigger Inverter, SOP-14 SMD
The 74HC14D (also marked SN74HC14DR) contains six independent Schmitt trigger inverters in a compact SOP-14 SMD package. The built-in hysteresis on each input makes it ideal for converting slow, noisy, or non-digital signals into clean logic levels — a must-have for signal conditioning, switch debouncing, and oscillator circuits.
Key Specifications
| Parameter | Value |
|---|---|
| Part Number | 74HC14D / SN74HC14DR |
| Package | SOP-14 (SMD) |
| Supply Voltage (VCC) | 2V – 6V |
| Number of Inverters | 6 (Hex) |
| Propagation Delay (tpd) | 7ns @ 5V |
| Output Current (IOH/IOL) | ±25mA |
| Input Hysteresis | ~0.9V @ 5V VCC |
| Logic Family | 74HC (High-Speed CMOS) |
| Operating Temperature | -40°C to +125°C |
| Condition | New, Original |
Why Choose 74HC14D?
- Schmitt trigger hysteresis — eliminates chatter and noise on slow-rising signals
- Wide supply range (2–6V) — compatible with 3.3V and 5V logic systems
- High-speed CMOS — 7ns propagation delay for fast digital designs
- ±25mA output drive — directly drives LEDs, small loads, and bus lines
- SOP-14 SMD — compact footprint for PCB space-constrained designs
- 10-pack value — sufficient for multiple projects or production runs
Typical Applications
- Signal conditioning — convert analog/slow signals to clean digital edges
- Switch & button debouncing — eliminate mechanical contact bounce in microcontroller inputs
- RC oscillator — build simple square-wave oscillators with one inverter + RC network
- Level conversion — interface between different logic voltage domains
- Noise-immune bus receivers — clean up long PCB traces or cable signals
- Waveform shaping — reshape degraded clock or data signals
Compatible With
Pin-compatible with 74HCT14, CD40106, SN74LS14, SN74S14 (verify voltage and timing requirements). Works with Arduino, STM32, ESP32, Raspberry Pi, and any 2–6V logic system.
FAQ
Q: What is the difference between 74HC14D and SN74HC14DR?
A: They are the same device. SN74HC14DR is Texas Instruments’ part number; 74HC14D is the NXP/Philips designation. Both are electrically identical hex Schmitt trigger inverters in SOP-14.
Q: Can I use 74HC14D with a 3.3V microcontroller?
A: Yes. The 74HC14D operates from 2V to 6V, making it fully compatible with 3.3V systems including STM32, ESP32, and Raspberry Pi GPIO.
Q: How many inverters are in one IC?
A: Six (hex). Each has an independent Schmitt trigger input and inverting output.
Package Contents
- 10× 74HC14D / SN74HC14DR SOP-14 SMD IC (new, original)
