Nexperia USA Inc. 74LV165AD,118

Overview

74LV165AD,118 from Nexperia is an 8-bit parallel-in/serial-out CMOS shift register with complementary serial outputs (Q7 and Q7), asynchronous parallel load (PL active LOW), and gated clock input supporting clock enable (CE) functionality. It operates from 2.0 V to 5.5 V, features Schmitt-trigger inputs for noise immunity, and includes IOFF power-down protection. It is used in industrial I/O expansion, LED matrix controllers, and microcontroller GPIO extender circuits.

For engineers reviewing the 74LV165AD,118 datasheet, 74LV165AD,118 pinout, 74LV165AD,118 application, or 74LV165AD,118 equivalent, key selection criteria include its dual-mode data loading (parallel/serial), 5.5 V-tolerant I/O, -40 °C to +85 °C operating range, and SO16 package compatibility with legacy 74-series layouts.

Technical Context

The device implements an 8-stage static shift register with independent parallel-load and serial-shift paths controlled by PL and CE logic. Its gate-OR clock structure allows CP and CE pins to be swapped for layout flexibility, provided CE transitions occur only while CP is HIGH.

Schmitt-trigger inputs ensure robust operation with slow-rising signals, and the IOFF circuit disables outputs during power-down to prevent backflow current-critical for hot-swap and partial-power-down systems. Propagation delays range from 5.5 ns (VCC = 5.0 V) to 24.0 ns (VCC = 2.5 V) for D7→Q7 transitions.

Key Specifications

Pinout & Package

74LV165AD,118 is housed in a plastic small outline package (SO16, SOT109-1) with 16 leads and 3.9 mm body width. Pin 1 is marked with a notch or dot; pin numbering follows standard SOIC convention (counterclockwise from top-left corner).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit parallel-in/serial-out shift register applications.

Compared with SN74LV165APWR, the 74LV165AD,118 offers identical logic and timing but superior thermal dissipation and hand-soldering accessibility in SO16. Against 74HC165N, it adds essential industrial features: IOFF, Schmitt triggers, and guaranteed 5.5 V I/O tolerance - making it the only option for mixed-voltage or power-gated designs.

Availability

74LV165AD,118 is available at Aetrix Electronics and suitable for industrial I/O expansion, LED matrix controllers, microcontroller GPIO extender circuits, and legacy bus interface adapters requiring stable component supply across extended temperature ranges.

Supply support for 74LV165AD,118 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 delivering high-performance, reliable logic, analog, and MOSFET solutions optimized for efficiency and miniaturization in industrial, automotive, and consumer electronics.

The 74LV165A belongs to Nexperia's LV logic family, designed specifically for low-voltage, high-noise-immunity applications in industrial control, instrumentation, and embedded systems where wide supply range and power-down safety are mandatory.

FAQ

Can 74LV165AD,118 operate reliably at 2.0 V supply?

Yes. The device is fully specified down to 2.0 V VCC per its recommended operating conditions. At this voltage, it delivers guaranteed 100 ns/V input transition rate tolerance, 22 ns max propagation delay (D7→Q7), and full functionality including PL-triggered parallel load and CE-gated shifting - validated across -40 °C to +85 °C.

What is the purpose of the complementary Q7 and Q7 outputs?

Q7 provides the true serial output from the final flip-flop; Q7 delivers its logical inverse. This pair enables direct connection to differential receivers, simplifies feedback loop design (e.g., ring counters), and eliminates external inverters when driving active-low loads like LED cathodes or reset lines - reducing component count and propagation delay.

How does the IOFF feature protect the device during power-down?

When VCC drops to 0 V, the IOFF circuit actively disables all outputs, forcing them into high-impedance state. This prevents current from flowing backward through I/O pins into the unpowered die - a critical safeguard in multi-rail systems, hot-swap modules, or battery-backed subsystems where other rails remain active.

Is pin 15 (CE) interchangeable with pin 2 (CP) in layout?

Yes - the datasheet explicitly states the CP and CE pins have arbitrary assignment and may be swapped for routing convenience. However, CE must transition from HIGH to LOW only while CP is HIGH to ensure predictable operation; violating this timing risks metastability or skipped clock cycles.