Nexperia USA Inc. 74HC165BQ,115

Overview

74HC165BQ,115 from Nexperia is an 8-bit parallel-in/serial-out CMOS shift register in DHVQFN16 package (2.5 × 3.5 × 0.85 mm), operating from 2.0 V to 6.0 V with -40 °C to +125 °C temperature range. It supports asynchronous parallel load (PL active LOW), synchronous serial shifting (CP edge-triggered), and features complementary Q7/Q7 outputs plus overvoltage-tolerant inputs up to 15 V - enabling high-to-low level shifting in microcontroller GPIO expansion systems.

For engineers reviewing the 74HC165BQ,115 datasheet, 74HC165BQ,115 pinout, 74HC165BQ,115 application, or 74HC165BQ,115 equivalent, key selection criteria include parallel-load latency (≤50 ns at 4.5 V), serial-shift propagation delay (≤33 ns), input voltage compatibility (CMOS-level), thermal-enhanced QFN footprint, and latch-up immunity exceeding 100 mA per JESD78 Class II Level B.

Technical Context

The device implements an 8-stage static shift register with dual-path output architecture: Q7 delivers the MSB of the internal register on CP rising edges when CE is LOW, while Q7 provides its logical complement. Parallel loading occurs asynchronously on PL LOW, independent of clock state, allowing immediate data capture from 8-bit buses without timing coordination.

Input clamping and ESD protection meet ANSI/ESDA/JEDEC JS-001 Class 2 (>2000 V HBM) and JS-002 Class C3 (>1000 V CDM). Clock enable (CE) gates CP transitions - a HIGH on CE freezes register state, supporting pause/resume operation in real-time data pipelines without external gating logic.

Key Specifications

Pinout & Package

DHVQFN16 package (SOT763-1): 2.5 × 3.5 × 0.85 mm body, 16-terminal leadless construction with exposed thermal pad (non-soldered or GND-connected), 0.5 mm pitch, JEDEC MO-241 compliant.

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 74HC165BQ,115, the 74HCT165BQ,115 offers tighter input threshold compatibility with legacy 5 V systems but shares identical timing and packaging; the SN74LV165AQPWRQ1 adds AEC-Q100 compliance at the cost of functional parity and package interchangeability.

Availability

74HC165BQ,115 is available at Aetrix Electronics and suitable for industrial PLC input expansion, automotive body control modules, and medical diagnostic equipment panels requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC165BQ,115 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 components for automotive, industrial, and consumer markets, with leadership in logic, MOSFETs, and ESD protection.

The 74HC165BQ,115 belongs to Nexperia's HC-series logic family - engineered for low-power, high-noise-immunity digital interfacing in space- and power-constrained embedded systems.

FAQ

What is the maximum clock frequency supported by the 74HC165BQ,115?

The 74HC165BQ,115 supports up to 61 MHz at VCC = 6.0 V and CL = 50 pF, or 56 MHz at VCC = 5.0 V and CL = 15 pF. Real-world achievable frequency depends on load capacitance and PCB trace impedance; for 3.3 V operation, typical max is 24 MHz due to reduced drive strength and higher propagation delays.

Can the 74HC165BQ,115 be used for level shifting between 5 V and 3.3 V systems?

Yes - its inputs tolerate up to 15 V regardless of VCC, allowing direct connection to 5 V sources while powered from 3.3 V. Outputs swing rail-to-rail (0 V to VCC), so 3.3 V operation yields 0–3.3 V outputs compatible with 3.3 V receivers. No external resistors or translators are needed for unidirectional 5 V → 3.3 V signal translation.

Does the DHVQFN package require soldering of the exposed thermal pad?

No - the exposed pad (terminal 1 index area) has no electrical or mechanical requirement to be soldered. If soldered, it must remain floating or be connected to GND. Thermal performance is optimized with GND connection, but functional operation is guaranteed without soldering, simplifying rework and prototyping.

How does the CE (clock enable) pin affect timing behavior?

When CE is HIGH, CP transitions are ignored - the register holds its state regardless of clock activity. This enables precise windowed shifting: CE can be pulsed LOW only during valid data windows, preventing spurious shifts from noise or clock glitches. Setup/hold times for CE relative to CP are specified (e.g., 20 ns min pulse width at 4.5 V), ensuring deterministic control.