Nexperia USA Inc. 74HCT9114D,112

Overview

74HCT9114D,112 from Nexperia is a 9-bit inverting Schmitt trigger buffer with open-drain outputs, designed for noise-immune signal conditioning and level translation between TTL and CMOS logic domains. It operates from 4.5 V to 5.5 V, features 9 independent input-to-output channels (A0–A8 → Y0–Y8), supports -40 °C to +125 °C ambient operation, and delivers jitter-free output transitions via hysteresis (VH = 0.2 V to 0.8 V). It is used in industrial sensor interface circuits where slow-rising or noisy signals require clean digital reconstruction.

For engineers reviewing the 74HCT9114D,112 datasheet, 74HCT9114D,112 pinout, 74HCT9114D,112 application, or 74HCT9114D,112 equivalent, key selection criteria include its TTL-compatible Schmitt thresholds (VT+ = 0.9–2.1 V, VT− = 0.7–1.7 V), open-drain drive capability (IO = ±4.0 mA), propagation delay (17–47 ns at VCC = 4.5 V), and SO20 package compatibility with legacy 74-series footprint layouts.

Technical Context

This device implements nine independent inverting Schmitt trigger stages, each with hysteresis optimized for TTL-level input recognition (VI thresholds fixed at 1.3 V reference points) and open-drain NMOS output structures enabling wired-OR bus interfacing. Input clamp diodes allow safe overvoltage tolerance up to VCC + 0.5 V when used with current-limiting resistors.

Its static behavior is defined by dual threshold voltages (VT+, VT−) yielding 0.2–0.8 V hysteresis, while dynamic performance is characterized by propagation delays (tpd) and transition times (tTHL) measured under CL = 50 pF load conditions. The device complies with JESD7A (2.0–6.0 V) and JESD8C (2.7–3.6 V) standards and supports full industrial temperature range operation.

Key Specifications

Pinout & Package

74HCT9114D,112 is housed in a plastic small outline package (SO20), SOT163-1 variant, with 20 leads and 7.5 mm body width. Pin 1 is marked by a notch or index dot; the package is lead-free and RoHS-compliant per Nexperia's standard manufacturing process.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 9-bit inverting Schmitt buffer applications.

Compared with 74HCT9114D,112, the 74HCT14D,112 saves PCB area but forces channel expansion via duplication, while SN74LV14APW trades TTL interoperability and extended temperature rating for lower static power and broader supply flexibility.

Availability

74HCT9114D,112 is available at Aetrix Electronics and suitable for industrial sensor interface, motor control feedback, automotive diagnostic line buffering, and legacy bus signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HCT9114D,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 specializing in high-performance, energy-efficient logic, analog, and MOSFET devices, serving automotive, industrial, and consumer markets with scalable, reliable components.

The 74HCT9114D,112 belongs to Nexperia's 74HCT logic family, engineered specifically for robust TTL-to-CMOS interfacing in harsh environments - emphasizing noise immunity, wide temperature operation, and bus-friendly open-drain architecture.

FAQ

Can 74HCT9114D,112 drive a 10 kΩ pull-up resistor to 5 V?

Yes. With IO = ±4.0 mA specified, the device can sink ≥4 mA while maintaining VOL ≤ 0.4 V at VCC = 4.5 V and +125 °C. A 10 kΩ pull-up to 5 V draws only 0.5 mA, well within rating - ensuring reliable LOW-state definition and fast rise times.

Is the 74HCT9114D,112 pin-compatible with the 74HC9114D version?

Yes. Both share identical SO20 (SOT163-1) pinout, functional diagram, and pin descriptions. The sole difference is input threshold optimization: 74HCT9114D uses fixed 1.3 V TTL-compatible thresholds, whereas 74HC9114D scales thresholds with VCC (e.g., VT+ ≈ 0.67 × VCC).

Does this device support hot-swap or live-insertion?

No. The 74HCT9114D,112 lacks explicit hot-swap protection features such as power-up sequencing control or Ioff partial-power-down mode. Its input clamp diodes provide limited overvoltage tolerance, but insertion under bias may cause transient current spikes or latch-up risk.

What is the maximum capacitive load per output before timing degradation exceeds specification?

Timing parameters (tpd, tTHL) are characterized at CL = 50 pF. Exceeding this increases propagation delay nonlinearly - e.g., at CL = 100 pF, tpd rises ~30% based on CPD = 5 pF and dynamic power model. For reliable timing, keep total load (trace + probe + IC input) ≤50 pF unless re-characterized.