Diodes Incorporated 74HC164S14-13

Overview

74HC164S14-13 from Diodes Incorporated is an 8-bit serial-in/parallel-out shift register with asynchronous master reset, dual ANDed serial inputs (DSA/DSB), positive-edge-triggered clock (CP), and eight buffered Q0–Q7 outputs. It operates from 2.0V to 6.0V, sinks/sources 4mA at V_CC = 4.5V, and features Schmitt-trigger inputs for noise immunity. It is used in PC peripheral interface expansion and LED segment driving where compact serial-to-parallel conversion is required.

For engineers reviewing the 74HC164S14-13 datasheet, 74HC164S14-13 pinout, 74HC164S14-13 application, or 74HC164S14-13 equivalent, key selection considerations include its dual-input AND logic for data enable control, asynchronous MR pin behavior, propagation delay (12–43 ns depending on V_CC), setup/hold timing compliance, and SO-14 package compatibility with legacy 74HC footprint designs.

Technical Context

The 74HC164S14-13 implements a synchronous shift register using edge-triggered D-type flip-flops cascaded in series, with each stage feeding the next on the rising edge of CP. Its dual serial inputs are internally ANDed, allowing one pin to act as a data path and the other as an active-HIGH enable - a functional distinction not found in single-input shift registers like the 74HC595.

Reset is fully asynchronous via MR (active LOW), forcing all Q outputs to logic LOW independent of CP or input states. The device supports wide temperature operation (–40°C to +125°C) and meets JESD22 ESD standards (2kV HBM, 1kV CDM), making it suitable for industrial-grade embedded control interfaces requiring robust timing and latch-up immunity.

Key Specifications

Pinout & Package

74HC164S14-13 is housed in a 14-pin SOIC (SO-14) package per JEDEC MS-012, with 1.27 mm pitch, gull-wing leads, and 8.53–8.74 mm body length. Pin 1 is marked by a beveled corner or notch; pin numbering follows standard counter-clockwise orientation when viewed from top.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC595N and SN74LV164APWR, the 74HC164S14-13 uniquely combines dual-input gating, Schmitt-trigger noise rejection, and true asynchronous reset in a minimal-pin-count SO-14 package - ideal for cost-sensitive, noise-prone, or reset-critical embedded interfaces.

Availability

74HC164S14-13 is available at Aetrix Electronics and suitable for LED display driver circuits, microcontroller GPIO expansion modules, and industrial control panel interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC164S14-13 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.

The 74HC164 belongs to Diodes' HC logic family - engineered for low-power, high-noise-immunity digital interfacing in industrial, computing, and consumer applications where reliability and pin compatibility with legacy TTL/CMOS are essential.

FAQ

Can 74HC164S14-13 operate reliably at 3.3V supply?

Yes. The device is fully specified from 2.0V to 6.0V, with guaranteed performance at 3.3V including VIH/VIL thresholds, output drive (±4mA), and maximum clock frequency (≥50 MHz). All AC/DC parameters in the datasheet include 4.5V and 2.0V test conditions, confirming robust 3.3V operation without derating.

What happens if both DSA and DSB are held HIGH during CP rising edge?

When both DSA and DSB are HIGH, the internal AND gate outputs HIGH, causing Q0 to load logic HIGH on the next CP rising edge. This behavior is explicitly defined in the Function Table (Page 2) and confirmed by the Logic Diagram (Page 3), where DSA and DSB feed a single AND gate driving the D input of the first flip-flop.

Is the MR pin truly asynchronous, and does it affect propagation delay?

Yes. MR is asynchronous and overrides all clock and data activity: asserting MR LOW immediately forces all Q outputs LOW, regardless of CP state or timing. This action introduces no propagation delay dependency - the datasheet specifies t_PHL(MR to Qn) as 11–24 ns (Page 5), confirming deterministic reset timing independent of CP edge alignment.

Does 74HC164S14-13 support hot insertion or live circuit connection?

No. The device lacks bus-hold or I^OFF protection circuitry. Applying V_CC while inputs are driven can cause latch-up or excessive current flow. Diodes Incorporated's Absolute Maximum Ratings (Page 3) specify VI limits of –0.5V to V_CC + 0.5V - violating this (e.g., powering V_CC after inputs are asserted) risks permanent damage per Note 8.