NXP Semiconductors 74HC9114N,112

Overview

74HC9114N,112 from Nexperia is a 9-bit inverting Schmitt trigger buffer IC with open-drain outputs and TTL-compatible input thresholds. It operates from 2.0 V to 6.0 V, delivers 10 ns propagation delay at 6.0 V (VCC), and supports industrial temperature range (−40 °C to +125 °C). It is used for noise-immune signal conditioning in bus interface and level translation circuits.

For engineers reviewing the 74HC9114N,112 datasheet, 74HC9114N,112 pinout, 74HC9114N,112 application, or 74HC9114N,112 equivalent, key selection criteria include Schmitt hysteresis (0.5–1.1 V), open-drain drive capability (±25 mA), input clamp diodes for overvoltage tolerance, and SO20 package compatibility with legacy 74-series layouts.

Technical Context

This device implements nine independent inverting Schmitt trigger stages, each transforming slow-rising/falling inputs into clean digital transitions via hysteresis (VT+ = 2.30–4.20 V, VT− = 1.80–3.30 V at VCC = 6.0 V). Inputs feature internal clamp diodes enabling safe interfacing to voltages exceeding VCC when current-limiting resistors are used.

The open-drain outputs support wired-AND logic, I²C-style bus sharing, and flexible pull-up voltage selection up to 7.0 V (absolute max). Static leakage is ≤±1.0 μA over full temperature range, and dynamic power dissipation per buffer is characterized by CPD = 5 pF.

Key Specifications

Pinout & Package

74HC9114N,112 is housed in a plastic small outline package (SO20) with 20 leads and 7.5 mm body width (SOT163-1). Pin 1 is index-marked; pin 10 is GND; pin 20 is VCC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC9114N,112, the 74HCT9114D,118 offers tighter TTL-level input matching but slower edge response, while the SN74LVTH162244DGGR provides greater density and speed at the cost of Schmitt functionality and open-drain versatility - making 74HC9114N,112 optimal for noise-prone, multi-voltage, or bus-shared designs.

Availability

74HC9114N,112 is available at Aetrix Electronics and suitable for industrial bus interface, switch debouncing, level translation, and I²C bus extension applications requiring stable component supply and long-term production continuity.

Supply support for 74HC9114N,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 semiconductor expert focused on high-volume, high-reliability logic, analog, and discrete components for automotive, industrial, and consumer markets.

The 74HC9114N,112 belongs to Nexperia's HC logic family, designed specifically for noise-immune signal conditioning in electrically harsh environments where robust input hysteresis and flexible output configuration are critical.

FAQ

What is the maximum supply voltage rating for the 74HC9114N,112?

The absolute maximum supply voltage (VCC) for the 74HC9114N,112 is +7.0 V, as specified in Table 4 of the datasheet. Operation above 6.0 V is not recommended for continuous use, and prolonged exposure to 7.0 V may impact long-term reliability. The device is characterized for reliable operation from 2.0 V to 6.0 V, with static and dynamic parameters guaranteed across that range. Always observe derating curves for total power dissipation when operating near absolute limits.

Does the 74HC9114N,112 support true bidirectional signal flow?

No, the 74HC9114N,112 does not support bidirectional signal flow. It is a unidirectional inverting buffer: signals flow only from inputs A0–A8 to corresponding open-drain outputs Y0–Y8. While the open-drain outputs allow wired-AND configurations (e.g., shared bus lines), the internal logic path is strictly input-to-output with fixed inversion. Bidirectional operation would require external control logic or a different device architecture such as a bus transceiver.

Can the 74HC9114N,112 be used to drive LEDs directly?

Yes, the 74HC9114N,112 can drive LEDs directly via its open-drain outputs. Each Yn output supports up to 25 mA sink current, sufficient for standard indicator LEDs. Connect the LED anode to a positive supply (≤7.0 V) and cathode to Yn, then select a series resistor based on forward voltage and desired current. Ensure total device power dissipation (including all active outputs) remains within the 500 mW limit at ambient temperatures ≤109 °C, with linear derating above that point.

What is the input hysteresis voltage of the 74HC9114N,112 at 5.0 V supply?

At VCC = 5.0 V, the 74HC9114N,112 exhibits a typical hysteresis voltage (VH) of 0.68 V, with a guaranteed minimum of 0.5 V and maximum of 1.10 V across the full −40 °C to +125 °C temperature range (Table 10). This hysteresis is derived from the difference between VT+ (positive-going threshold) and VT− (negative-going threshold), ensuring reliable noise rejection for slowly varying or noisy input waveforms.

Is the 74HC9114N,112 pin-compatible with other 74HC9114 variants?

Yes, the 74HC9114N,112 is pin-compatible with all members of the 74HC9114/74HCT9114 family in the SO20 (SOT163-1) package, including 74HC9114D and 74HCT9114D. All share identical pin numbering, function mapping (A0–A8, Y0–Y8, GND, VCC), and mechanical footprint. Electrical differences - such as input threshold levels and propagation delay - do not affect physical layout or soldering, enabling drop-in substitution where system voltage and timing margins permit.