SN74LS14DB Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The SN74LS14DB is a hex Schmitt-trigger inverter IC from Texas Instruments containing six independent inverting gates with hysteresis, operating from 0°C to 70°C in a 14-pin SSOP package. The Schmitt-trigger inputs provide noise immunity for slow or noisy input signals by using hysteresis thresholds. Available from authorized distributors with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 14
- Lifecycle
- ACTIVE
- Datasheet
- SN74LS14DB Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Six independent Schmitt-trigger inverters in a single package provide hysteresis-based noise immunity for slow, noisy, or triangular input waveforms
- LS (Low-power Schottky) TTL logic family balances speed and power consumption for 5 V digital logic systems
- Compact 14-pin SSOP package reduces PCB footprint compared to standard SOIC, ideal for space-constrained designs
- 0°C to 70°C commercial temperature range suits a wide variety of consumer, industrial, and computing applications
Applications
The SN74LS14DB is commonly used for signal conditioning of slow or noisy digital inputs, converting sinusoidal or RC-charged signals into clean digital square waves in microcontroller and FPGA interface circuits. Its Schmitt-trigger hysteresis prevents multiple transitions caused by input noise or signal ringing, making it ideal for button debouncing, oscillator circuits, and level conversion applications. The six independent inverters also enable compact multi-signal inversion in logic glue, clock buffering, and reset circuit designs.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the SN74LS14DB and what makes it different from a standard inverter?
The SN74LS14DB contains six independent TTL inverters with Schmitt-trigger inputs, distinguishing it from standard inverters by incorporating hysteresis. The Schmitt trigger uses separate positive-going and negative-going threshold voltages, meaning the output does not switch until the input has clearly crossed a threshold in each direction. This prevents spurious output transitions caused by noise, slow edges, or ringing on the input signal.
What is the Schmitt-trigger hysteresis benefit in the SN74LS14DB?
Schmitt-trigger hysteresis means the input switching thresholds for a high-to-low output transition and a low-to-high output transition are different (typically about 0.4 V to 0.8 V apart in LS TTL). This gap between the two thresholds creates noise immunity: small signal fluctuations around a threshold level do not cause the output to toggle back and forth. This is especially valuable for signals from mechanical switches, RC networks, slow oscillators, and long cable runs.
What package does the SN74LS14DB come in?
The SN74LS14DB is housed in a 14-pin SSOP (Shrink Small Outline Package). The SSOP package has a smaller footprint and tighter pin pitch than standard SOIC, making it suitable for compact PCB designs. It is compatible with standard SMT reflow soldering. Designers upgrading from a 14-pin DIP or SOIC version of the SN74LS14 should account for the different footprint when selecting this SSOP variant.
What are typical applications for the SN74LS14DB?
Typical applications include button and switch debouncing circuits, RC oscillator waveform shaping, clock signal conditioning, digital signal noise filtering, and logic level conversion in mixed-signal boards. The six-inverter configuration also makes it useful for inverting multiple control signals simultaneously in microcontroller peripherals, sensor interfaces, and reset generation circuits where clean digital transitions are critical.
Is the SN74LS14DB compatible with CMOS logic families?
The SN74LS14DB is a TTL LS-family device and its output levels are compatible with standard TTL inputs (V_OH typically at least 2.7 V, V_OL at most 0.5 V). When interfacing with CMOS logic families such as HC operating at 5 V, the LS TTL output high level may require a pull-up resistor to raise V_OH closer to the supply rail, since CMOS VIH thresholds can be as high as 3.5 V at 5 V supply.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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