NXP Semiconductors 74HCT9115D,112

Overview

74HCT9115D,112 from Nexperia is a nine-channel non-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 13 ns typical propagation delay (VCC = 5 V, CL = 15 pF), 3.5 pF input capacitance, and operates across −40 °C to +125 °C. It is used in industrial sensor interface circuits where slow or noisy input signals require clean, jitter-free output transitions.

For engineers reviewing the 74HCT9115D,112 datasheet, 74HCT9115D,112 pinout, 74HCT9115D,112 application, or 74HCT9115D,112 equivalent, key selection criteria include Schmitt-trigger hysteresis (0.44 V typ. at VCC = 4.5 V), open-drain output voltage tolerance (up to VOmax), compatibility with LSTTL logic levels, and requirement for external pull-up resistors in wired-OR configurations.

Technical Context

The 74HCT9115D,112 implements nine independent Schmitt-trigger input stages feeding open-drain NMOS output transistors without internal VCC clamping diodes. Its input thresholds are TTL-compatible: VT+ = 1.2 V (typ.), VT− = 0.8 V (typ.) at VCC = 4.5 V, yielding 0.44 V hysteresis for noise rejection.

Each channel operates as a unidirectional level shifter: when An = LOW, Yn = HIGH-Z; when An = HIGH, Yn = LOW (sinking current). Output voltage swing is externally defined by the pull-up rail, enabling translation between 3.3 V, 5 V, or higher domains without level-shifter ICs.

Key Specifications

Pinout & Package

74HCT9115D,112 is housed in a 20-pin SO20 (Small Outline) package per JEDEC MS-013, 7.5 mm body width, 1.27 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HCT9115D,112, the 74HCT14D,653 offers fewer channels and no level-shifting capability, while SN74LVTH16244ADGGR provides higher channel count but lacks Schmitt inputs and open-drain functionality-making 74HCT9115D,112 uniquely suited for noise-prone, multi-voltage, or bus-oriented designs.

Availability

74HCT9115D,112 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and embedded sensor subsystems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for 74HCT9115D,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 discrete, logic, and power MOSFET solutions for automotive, industrial, and consumer markets.

The 74HCT9115D,112 belongs to Nexperia's 74HCT logic family, engineered for TTL-compatible operation in noise-sensitive 5 V systems requiring robust signal integrity and flexible output interfacing.

FAQ

What is the recommended pull-up resistor value for 74HCT9115D,112 outputs?

For 74HCT9115D,112 open-drain outputs operating at 5 V with typical load capacitance ≤50 pF, a 4.7 kΩ pull-up resistor balances speed (≤20 ns rise time) and power (≤1 mA static current). Lower values improve rise time but increase static power; higher values reduce power but risk marginal timing in high-capacitance buses. Always verify against actual bus capacitance and timing budget in the final 74HCT9115D,112 application.

Does 74HCT9115D,112 support 3.3 V input logic levels?

No, 74HCT9115D,112 is specified for 5 V operation only (VCC = 4.5 V to 5.5 V) and has TTL-compatible input thresholds (VT+ ≈ 1.2 V, VT− ≈ 0.8 V). While 3.3 V logic HIGH may exceed VT+ and register as valid, it violates the HCT family's VI specification (VI = GND to VCC − 1.5 V = 3.0 V max at VCC = 4.5 V). For reliable 3.3 V interfacing, use 74LVC9115 or level-shifting circuitry with the 74HCT9115D,112.

Can 74HCT9115D,112 replace 74HCT9114D,112 in a design?

Yes, 74HCT9115D,112 can replace 74HCT9114D,112 if non-inverting logic is required: both share identical pinout, package, electrical specs, and Schmitt-trigger/open-drain architecture. The sole functional difference is output polarity - 74HCT9114D,112 is inverting, while 74HCT9115D,112 is non-inverting. Verify downstream logic polarity requirements before substitution in the 74HCT9115D,112 design.

What is the maximum output sink current for 74HCT9115D,112?

The 74HCT9115D,112 output transistor is rated for IO(max) = 4 mA per channel at VCC = 4.5 V and Tamb = 25 °C, per Nexperia's 74HCT family specifications. At higher temperatures or lower VCC, derating applies. Exceeding this current risks output voltage rise above VOL spec (0.4 V max), compromising noise margin. Always size external pull-ups and loads to maintain VOL ≤ 0.4 V across temperature and voltage extremes for the 74HCT9115D,112.

Is 74HCT9115D,112 RoHS compliant and halogen-free?

Yes, 74HCT9115D,112 is RoHS compliant (2011/65/EU) and halogen-free per Nexperia's product compliance documentation. The "D,112" suffix denotes a lead-free, green (halogen-free) SO20 package. Full compliance data, including REACH and conflict minerals statements, is available in the official Nexperia 74HCT9115D,112 product change notification and material declaration reports.