Nexperia USA Inc. 74HC165DB,112

Overview

74HC165DB,112 from Nexperia is an 8-bit parallel-in/serial-out CMOS shift register in SO16 (SOT109-1) package, featuring asynchronous parallel load (PL), synchronous serial shift (CP/CE), dual complementary outputs (Q7/Q7), and overvoltage-tolerant inputs up to 15 V. It operates from 2.0 V to 6.0 V across –40 °C to +125 °C and enables high-to-low level shifting in microcontroller GPIO expansion interfaces.

For engineers reviewing the 74HC165DB,112 datasheet, 74HC165DB,112 pinout, 74HC165DB,112 application, or 74HC165DB,112 equivalent, key selection criteria include parallel-load latency (≤50 ns @ 4.5 V), serial-shift propagation delay (≤33 ns), TTL-compatible input option via 74HCT165 variant, and SO16 thermal performance (Ptot = 500 mW).

Technical Context

This device implements a synchronous 8-stage shift register with dual-path output architecture: Q7 delivers the MSB of the shift register while Q7 provides its logical complement. The PL input enables immediate parallel capture independent of clock edges, decoupling data acquisition from timing constraints.

Its CE-controlled clock gating allows precise enable/disable of shift operations without disrupting internal state, and DS input accepts serial data during shift mode while CP transitions trigger bit advancement on LOW-to-HIGH edges. Input overvoltage tolerance supports mixed-voltage system interfacing without external level translators.

Key Specifications

Pinout & Package

74HC165DB,112 is housed in a plastic small outline package (SO16, SOT109-1) with 16 leads, 3.9 mm body width, and standard 1.27 mm lead pitch. Thermal dissipation supports 500 mW at ≤110 °C ambient before linear derating begins.

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 74HC165DB,112, the 74HCT165DB,112 improves input compatibility in 5 V TTL systems without altering board design, while SN74LV165AIPWR trades robustness (no overvoltage tolerance, no Q7) for speed and lower supply headroom - making each alternative optimal only within distinct interface constraints.

Availability

74HC165DB,112 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, and microcontroller GPIO multiplexing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC165DB,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 delivering high-performance, reliable discrete, logic, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for automotive, industrial, and consumer markets.

The 74HC165 belongs to Nexperia's 74HC logic family - engineered for low-power, wide-supply-operation digital interfacing in space- and energy-constrained embedded systems.

FAQ

Can 74HC165DB,112 operate reliably at 2.0 V supply?

Yes. The device is fully specified down to 2.0 V: propagation delays remain ≤165 ns, VIH is guaranteed ≥1.5 V, and static drive strength meets 4 mA output current per pin. This enables direct use with 2.0 V–3.3 V microcontrollers and battery-powered sensors without level translation.

What is the maximum clock frequency for sustained operation?

At VCC = 4.5 V and CL = 50 pF, the maximum guaranteed clock frequency is 24 MHz over –40 °C to +85 °C, and 20 MHz over –40 °C to +125 °C. With reduced load capacitance (CL = 15 pF), fmax reaches 56 MHz at 5.0 V - verified per Table 7 in the official Nexperia datasheet Rev. 8.

Does the SO16 package support reflow soldering per JEDEC J-STD-020?

Yes. The SOT109-1 (SO16) package is qualified for standard lead-free reflow profiles, including peak temperatures up to 260 °C for ≤30 seconds. Its moisture sensitivity level is MSL3, requiring bake-out only if exposed >168 hours at >30 °C/60% RH per JEDEC J-STD-033.

How does the CE input interact with PL during parallel load?

CE has no effect during PL assertion: when PL is LOW, D0–D7 load asynchronously into the register regardless of CE or CP state. CE only gates CP sensitivity during serial shift mode (PL = HIGH). This separation ensures deterministic parallel capture even when CE is held HIGH for clock inhibition.