SN74AHCT1G14DCKT

Overview

The SN74AHCT1G14DCKT is a single Schmitt-trigger inverter from the Texas Instruments AHCT logic family, housed in an SC-70-5 surface-mount package. It operates within a supply voltage range of 4.5 V to 5.5 V and supports a wide operating temperature range from -40°C to +85°C. The device features a maximum propagation delay of 12 ns at 5 V with a 50 pF load, ensuring fast signal inversion. Output drive capabilities include ±8 mA for both high and low states, while static current consumption remains low at a maximum of 20 µA.

Feature Summary

• Schmitt-trigger input action provides defined thresholds to filter noisy signals and prevent false triggering during slow input transitions.
• AHCT technology ensures full compatibility with standard CMOS logic outputs while accepting TTL-level inputs directly.
• SC-70-5 packaging offers a compact footprint suitable for space-constrained portable and high-density electronic designs.

Applications

• Signal conditioning for noisy digital lines requiring noise immunity
• Wave shaping of slow-rising or oscillating input signals
• Interface between TTL-driven sources and CMOS-based logic circuits

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when ordering. Confirm that system power supplies strictly adhere to the 4.5 V minimum requirement, as operation below this threshold may result in undefined logic levels or excessive current draw. Ensure ESD precautions are maintained during handling due to the small form factor.

Selection Notes

Select this component when interfacing 5 V TTL logic with 5 V CMOS systems where noise immunity is critical. Unlike the AHC series, the AHCT variant accepts lower input voltages typical of TTL devices without external level shifting. Consider the SC-70-5 package size constraints and verify that the 8 mA output drive meets the capacitive load requirements of the downstream circuitry.

Part Context

This part belongs to the SN74AHCT1Gxx series of single-function logic gates designed for 5 V applications. It complements other inverters and buffers in the same family, such as the non-inverting SN74AHCT1G17, allowing designers to build complex logic functions using standardized, low-power components across various industrial and consumer electronics platforms.

Replacement Considerations

SN74AHCT1G14DCKR (Reel variant)

FAQ

What is the primary function of the Schmitt trigger in this inverter?

The Schmitt trigger converts slowly changing or noisy input signals into clean, sharp digital transitions by utilizing distinct positive and negative threshold voltages, thereby preventing multiple output toggles caused by signal noise.

How does the AHCT series differ from the AHC series regarding input compatibility?

The AHCT series is designed to accept TTL-compatible input voltage levels directly, whereas the AHC series typically requires higher input voltages closer to its own supply rail to register a valid logic high state.