NXP Semiconductors 74HCT9114N,112

Overview

74HCT9114N,112 from Nexperia is a nine-channel inverting Schmitt trigger buffer with open-drain N-channel MOSFET outputs, designed for noise-immune signal conditioning and level shifting in 5 V digital systems. It features 9 independent input-output channels, Schmitt-trigger hysteresis (min. 0.44 V at VCC = 4.5 V), propagation delay of 17 ns typical (VCC = 4.5 V, CL = 50 pF), and operates across −40 °C to +85 °C. It is used in industrial sensor interface circuits where slow or noisy signals require clean, jitter-free inversion and bus-OR logic.

For engineers reviewing the 74HCT9114N,112 datasheet, 74HCT9114N,112 pinout, 74HCT9114N,112 application, or 74HCT9114N,112 equivalent, key selection criteria include verified Schmitt input thresholds (VT+ = 1.2 V, VT− = 0.8 V at 25 °C), open-drain output voltage tolerance up to VOmax, required external pull-up configuration, and compatibility with 5 V TTL-level control buses.

Technical Context

The 74HCT9114N,112 implements nine independent inverting Schmitt buffers using high-speed Si-gate CMOS technology, fully compliant with JEDEC Standard No. 7A and pin-compatible with LSTTL. Each channel accepts TTL-compatible inputs (VI = GND to 3 V) and delivers open-drain outputs capable of sinking current while floating high when inactive.

Its Schmitt-trigger inputs provide hysteresis (VH = 0.44 V typical at VCC = 4.5 V), enabling reliable digitization of slowly rising/falling analog or noisy digital waveforms. The unclamped N-transistor outputs allow bidirectional level translation between 0–5 V domains when paired with appropriate pull-ups, supporting wired-OR logic and mixed-voltage interfacing without additional level shifters.

Key Specifications

Pinout & Package

74HCT9114N,112 is supplied in a 20-pin dual in-line package (DIP) with 0.3-inch body width and through-hole mounting. Pin 10 is GND; Pin 20 is VCC; Pins 1–9 are inputs A0–A8; Pins 11–19 are outputs Y0–Y8 (inverted, open-drain).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar inverting Schmitt buffer applications.

Compared with 74HCT9114N,112, the 74HCT14D,653 offers footprint efficiency but halves channel count, while SN74LV14APWR sacrifices open-drain flexibility for wider VCC range and lower static current - neither matches the 9-channel, open-drain, TTL-compatible Schmitt functionality of the 74HCT9114N,112 in industrial bus interface roles.

Availability

74HCT9114N,112 is available at Aetrix Electronics and suitable for industrial sensor interfaces, wired-OR bus control, and TTL-compatible reset distribution requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for 74HCT9114N,112 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global leader in high-volume production of discrete, logic, and PowerMOS semiconductors, spun off from NXP's Standard Products division in 2017.

The 74HCT9114N,112 belongs to Nexperia's 74HCT logic family, engineered for industrial and automotive applications demanding robust noise immunity, TTL compatibility, and reliable open-drain interfacing in 5 V systems.

FAQ

What is the supply voltage range for the 74HCT9114N,112?

The 74HCT9114N,112 operates over a VCC range of 4.5 V to 5.5 V. This range ensures compatibility with standard 5 V TTL and CMOS systems while maintaining guaranteed input thresholds and propagation delays. Operation outside this range may result in undefined logic states or degraded timing performance. Always decouple VCC to GND with a 100 nF ceramic capacitor near the package.

Does the 74HCT9114N,112 have built-in pull-up resistors on its outputs?

No, the 74HCT9114N,112 does not include internal pull-up resistors. Its Y0–Y8 outputs are open-drain N-channel MOSFETs that only sink current when active. An external pull-up resistor must be connected between each output and the desired logic HIGH voltage (e.g., 5 V or 3.3 V) to establish a defined HIGH state during the OFF condition. Typical values range from 1 kΩ to 10 kΩ depending on speed and load requirements.

Can the 74HCT9114N,112 be used for level shifting between 3.3 V and 5 V domains?

Yes, the 74HCT9114N,112 supports bidirectional level shifting. Its TTL-compatible inputs accept 3.3 V logic HIGH (≥2.0 V) and drive open-drain outputs that can be pulled to 5 V. When a 3.3 V microcontroller drives A0, the corresponding Y0 output can sink a 5 V pull-up - effectively translating LOW from 3.3 V domain to 5 V domain. The reverse direction requires verifying that the 5 V signal stays within the 74HCT9114N,112's absolute maximum input rating (VCC + 0.5 V).

What is the hysteresis voltage (VH) of the 74HCT9114N,112 at 25 °C and VCC = 4.5 V?

At 25 °C and VCC = 4.5 V, the 74HCT9114N,112 exhibits a typical hysteresis voltage (VH = VT+ − VT−) of 0.44 V, with VT+ = 1.2 V and VT− = 0.8 V. This 440 mV window ensures reliable rejection of noise spikes up to ±220 mV on input signals, making it ideal for conditioning slow-rising signals from mechanical switches, thermistors, or RC networks without external filtering.

Is the 74HCT9114N,112 pin-compatible with the 74HC9114N,112?

Yes, the 74HCT9114N,112 is pin-compatible with the 74HC9114N,112. Both share identical pinout, package (20-pin DIP), and functional architecture. The primary difference lies in input threshold compatibility: 74HCT9114N,112 accepts TTL-level inputs (VIH ≥ 2.0 V), while 74HC9114N,112 requires CMOS-level inputs (VIH ≥ 0.7 × VCC). Electrical substitution is possible only if the driving source meets the stricter threshold requirement of the HC variant.