NXP Semiconductors 74HC594D-Q100,118

Overview

74HC594D-Q100 from Nexperia is an AEC-Q100 Grade 1 qualified 8-bit serial-in/parallel-out shift register with independent shift and storage registers, CMOS-level inputs, 2.0–6.0 V supply range, and -40 °C to +125 °C operation - used in automotive lighting control and dashboard display drivers where synchronized data latching and cascadeable serial expansion are required.

For engineers reviewing the 74HC594D-Q100 datasheet, 74HC594D-Q100 pinout, 74HC594D-Q100 application, or 74HC594D-Q100 equivalent, key selection criteria include independent SHCP/STCP timing control, dual active-low reset (SHR/STR), Q7S serial output for daisy-chaining, SO16 package compatibility with legacy PCB footprints, and automotive-grade thermal and ESD robustness (HBM >2000 V).

Technical Context

This device implements a two-stage pipeline: an 8-bit shift register accepting serial data on SHCP rising edges, and a separate 8-bit storage register transferring latched data to parallel outputs (Q0–Q7) on STCP rising edges. The independent clocks enable precise timing separation - e.g., continuous shifting while holding stable outputs.

Both registers feature dedicated asynchronous resets (SHR and STR, active LOW), allowing selective clearing without disrupting the other stage. Input clamp diodes support interfacing to voltages exceeding VCC when used with current-limiting resistors, enhancing system-level fault tolerance in automotive harness environments.

Key Specifications

Pinout & Package

74HC594D-Q100 uses the SO16 plastic small outline package (SOT109-1), 16-pin, 3.9 mm body width, with standard 1.27 mm pitch - compatible with automated SMT assembly and legacy through-hole footprint adapters.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit shift register with storage register applications.

Compared with 74HCT594D-Q100 and SN74HC595QPWRQ1, the 74HC594D-Q100 provides superior timing control via separate SHCP/STCP domains and true dual-reset capability - essential for automotive subsystems requiring deterministic output freeze and recovery without software intervention.

Availability

74HC594D-Q100 is available at Aetrix Electronics and suitable for automotive lighting control, instrument cluster display drivers, body control module I/O expansion, and remote keyless entry receiver interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC594D-Q100 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 applications - with leadership in logic, MOSFETs, ESD protection, and analog devices.

The 74HC594D-Q100 belongs to Nexperia's automotive-qualified HC logic family, designed specifically for robust serial-to-parallel data conversion in harsh environments where AEC-Q100 compliance, wide voltage operation, and precise timing control are mandatory.

FAQ

What is the difference between SHCP and STCP in the 74HC594D-Q100?

SHCP (Shift Register Clock Pulse) controls data movement within the 8-bit shift register on each rising edge, while STCP (Storage Register Clock Pulse) transfers the entire 8-bit content from the shift register to the parallel output latches (Q0–Q7). Their independence allows continuous data shifting without updating outputs - enabling flicker-free LED control and deterministic timing in automotive displays.

Can the 74HC594D-Q100 be used with a 3.3 V microcontroller?

Yes - the 74HC594D-Q100 operates from 2.0 V to 6.0 V and has CMOS-level inputs. At VCC = 3.3 V, VIH is 2.1 V (min), ensuring reliable recognition of 3.3 V logic HIGH from standard microcontrollers; output VOH exceeds 3.0 V at IO = −6 mA, supporting direct interface to 3.3 V inputs without level shifters.

How does the Q7S pin enable cascading?

Q7S outputs the most recent bit shifted out of the shift register's Q7 stage. Connecting Q7S to the DS (Data Serial) input of a second 74HC594D-Q100 allows serial data to flow across devices. With synchronized SHCP and STCP lines, multiple devices behave as a single extended shift register - e.g., three devices yield 24-bit parallel output controlled by one serial stream.

Is the SO16 package of the 74HC594D-Q100 RoHS and REACH compliant?

Yes - the 74HC594D-Q100 in SO16 (SOT109-1) packaging is fully RoHS Directive 2011/65/EU compliant and REACH SVHC-free per Nexperia's material declarations. Lead finish is matte tin, and the package contains no intentionally added antimony, beryllium, or cobalt - meeting automotive OEM chemical compliance requirements.