Nexperia USA Inc. 74HC166PW,112

Overview

74HC166PW,112 from Nexperia is an 8-bit parallel-in/serial-out shift register with synchronous parallel load and serial shift capability. It features CMOS-level inputs, operates from 2.0 V to 6.0 V, supports -40 °C to +125 °C ambient range, and delivers 68 MHz max clock frequency at 6.0 V - used in microcontroller GPIO expansion and LED matrix controllers.

For engineers reviewing the 74HC166PW,112 datasheet, 74HC166PW,112 pinout, 74HC166PW,112 application, or 74HC166PW,112 equivalent, key selection factors include parallel load timing (tSU = 10 ns @ VCC = 6.0 V), propagation delay to Q7 (14 ns typ), master reset assertion time (17 ns typ), and TSSOP16 thermal derating (8.5 mW/K above 91 °C).

Technical Context

This device implements a synchronous 8-stage shift register with dual-path input control: parallel data (D0–D7) loads on PE low and CP rising edge, while serial data (DS) shifts in when PE is high. The asynchronous master reset (MR) forces all outputs low independently of clock state.

Its logic architecture includes edge-triggered flip-flops with gated clock enable (CE active LOW), clamp diodes for overvoltage-tolerant inputs, and output drive rated for ±25 mA per pin. Timing behavior is fully characterized across voltage (2.0–6.0 V) and temperature (-40 °C to +125 °C) ranges per JEDEC JESD7A.

Key Specifications

Pinout & Package

TSSOP16 plastic thin shrink small outline package (SOT403-1), 16-pin, 4.4 mm body width, 0.65 mm pitch, exposed pad not present.

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 74HCT166PW,112, the 74HC166PW,112 offers higher speed and wider voltage flexibility but requires CMOS-level drive; versus SN74LV165APWR, it provides 5 V tolerance, MR, and guaranteed Q7 output - essential for industrial daisy-chaining and safe startup.

Availability

74HC166PW,112 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, LED display controllers, sensor data concentrators, and embedded microcontroller peripheral expansion requiring stable component supply across extended temperature and voltage ranges.

Supply support for 74HC166PW,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 logic, analog, and MOSFET solutions with focus on efficiency, reliability, and sustainability.

The 74HC166PW,112 belongs to Nexperia's HC logic family - engineered for low-power, wide-supply industrial control applications where robust timing, noise immunity, and extended temperature operation are mandatory.

FAQ

Can 74HC166PW,112 operate reliably at 3.3 V with 5 V-tolerant inputs?

Yes. The 74HC166PW,112 functions across 2.0 V to 6.0 V supply range and features input clamp diodes allowing interface to signals up to VCC + 0.5 V. At VCC = 3.3 V, VIH is 2.31 V (min), providing 1.19 V noise margin for 3.3 V logic, and inputs tolerate up to 3.8 V - sufficient for most 3.3 V systems with minor overshoot.

What is the minimum pulse width required on MR for guaranteed reset?

The minimum MR pulse width is 17 ns (typical) at VCC = 6.0 V and 25 °C, with maximum specified as 26 ns over -40 °C to +125 °C. For robust design, maintain ≥50 ns MR low pulse width to ensure reliable asynchronous reset across voltage, temperature, and process corners.

How does CE interact with PE during parallel load operations?

CE and PE operate independently: CE gates the CP input (disabling clock action when HIGH), while PE selects data source (parallel when LOW, serial when HIGH). During parallel load, CE must be LOW to allow CP edge to trigger loading; if CE is HIGH, CP is ignored and no load occurs - even with PE = LOW.

Is the TSSOP16 package (SOT403-1) RoHS-compliant and lead-free?

Yes. The 74HC166PW,112 in SOT403-1 packaging is RoHS-compliant and lead-free per EU Directive 2011/65/EU and Nexperia's product compliance documentation. Terminal finish is matte tin, and the package meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) for unlimited floor life at ≤30 °C/85% RH.