Nexperia USA Inc. 74HC594DB,118

Overview

74HC594DB,118 from Nexperia is an 8-bit serial-in/parallel-out shift register with independent shift and storage registers, CMOS-level inputs, 2.0–6.0 V supply range, -40 °C to +125 °C operation, and SSOP16 package. It enables serial-to-parallel data conversion in LED matrix drivers and I/O expansion circuits where output latching and clock isolation are required.

For engineers reviewing the 74HC594DB,118 datasheet, 74HC594DB,118 pinout, 74HC594DB,118 application, or 74HC594DB,118 equivalent, this device supports cascaded shift-register chains via Q7S, provides independent SHCP/STCP clocks for precise timing control, and delivers ±35 mA parallel output drive at 6 V - critical for driving LEDs or logic loads without external buffers.

Technical Context

The 74HC594DB,118 implements two synchronized but independently clocked 8-bit registers: a shift register accepting serial data on DS with LOW-to-HIGH SHCP edges, and a storage register capturing shift register contents on LOW-to-HIGH STCP edges. This architecture decouples data loading from output update, enabling glitch-free output transitions.

It features active-low asynchronous reset pins (SHR and STR) for each register, input clamp diodes allowing overvoltage-tolerant interfacing, and TTL-compatible input thresholds only in the 74HCT variant - confirming this part is the 74HC version with CMOS-level input thresholds (VIH ≥ 3.15 V at VCC = 4.5 V).

Key Specifications

Pinout & Package

74HC594DB,118 uses the SSOP16 (SOT338-1) package: plastic shrink small outline, 16 leads, 5.3 mm body width, 0.65 mm lead pitch, and exposed pad not electrically connected.

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 74HC594DB,118, the 74HC595DB,118 sacrifices shift register reset independence for lower pin count, while SN74HC594PWR offers identical functionality in a narrower TSSOP package - choice depends on reset architecture requirements and PCB layout constraints.

Availability

74HC594DB,118 is available at Aetrix Electronics and suitable for LED matrix drivers, I/O port expanders, remote control holding registers, and industrial sensor interfaces requiring stable component supply across automotive and industrial temperature ranges.

Supply support for 74HC594DB,118 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 focus on efficiency and sustainability.

The 74HC594 series belongs to Nexperia's logic IC portfolio designed specifically for robust serial-to-parallel data conversion in noise-prone, wide-temperature environments - emphasizing latch integrity, timing precision, and long-term supply stability.

FAQ

What is the difference between SHCP and STCP in the 74HC594DB,118?

SHCP clocks the shift register to advance serial data through Q0–Q7, while STCP transfers the entire 8-bit content from the shift register to the output latches (Q0–Q7). They operate independently: SHCP controls data loading, STCP controls output update - preventing glitches during data transfer.

Can the 74HC594DB,118 drive LEDs directly?

Yes - each Qn output delivers ±35 mA at VCC = 6.0 V, sufficient to drive standard 20 mA LEDs with appropriate current-limiting resistors. The storage register ensures steady-state LED illumination without flicker during serial data loading.

Is the Q7S pin necessary for single-device operation?

No - Q7S is used only when cascading multiple 74HC594 devices. In standalone use, Q7S may be left unconnected. It outputs the most recent bit shifted out of Q7, enabling daisy-chain expansion without additional logic.

Does the 74HC594DB,118 support hot insertion or live swapping?

No - it lacks hot-swap protection circuitry. Applying power while signals are present may violate absolute maximum ratings. Power sequencing must ensure VCC is stable before applying input signals, especially DS, SHCP, or STCP.