Nexperia USA Inc. 74HC597PW,118

Overview

74HC597PW,118 from Nexperia is an 8-bit parallel-in/serial-out shift register with integrated input flip-flops, designed for data acquisition and serial interface expansion in industrial control and embedded I/O systems. It features dual positive-edge-triggered clocks (STCP for storage, SHCP for shifting), asynchronous master reset (MR), parallel load (PL), and serial data input (DS), operating across 2.0 V to 6.0 V supply range with guaranteed operation from –40 °C to +125 °C.

For engineers reviewing the 74HC597PW,118 datasheet, 74HC597PW,118 pinout, 74HC597PW,118 application, or 74HC597PW,118 equivalent, this device supports high-noise-immunity digital interfacing in PLC modules, sensor data consolidation, LED matrix drivers, and microcontroller GPIO expansion where deterministic timing, latch isolation, and TTL/CMOS-compatible inputs are required.

Technical Context

The 74HC597PW,118 implements a two-stage architecture: an 8-bit parallel-access input latch (D0–D7) clocked by STCP, followed by an 8-bit shift register clocked by SHCP. Data transfers from latches to shift register on PL low, while MR low asynchronously clears the shift register output (Q). Input clamp diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors.

Timing behavior is strictly edge-triggered: STCP and SHCP respond only to LOW-to-HIGH transitions; MR and PL are active-low asynchronous controls. Propagation delays are specified down to 16 ns (VCC = 6.0 V, CL = 50 pF), supporting maximum clock frequencies up to 104 MHz at 6.0 V, with set-up/hold times as tight as 5 ns for Dn and DS inputs relative to STCP/SHCP edges.

Key Specifications

Pinout & Package

TSSOP16 plastic thin shrink small outline package (SOT403-1), 16-pin, 4.4 mm body width, 0.65 mm pitch - optimized for high-density PCB layouts with thermal and mechanical reliability in automated assembly.

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 74HCT597PW,118 and SN74HC165PWR, the 74HC597PW,118 offers superior input isolation via dual-clock staging and broader supply flexibility (2.0–6.0 V), making it optimal for mixed-voltage industrial interfaces where latch timing independence and voltage scalability are critical.

Availability

74HC597PW,118 is available at Aetrix Electronics and suitable for industrial PLC modules, sensor fusion subsystems, LED display controllers, and microcontroller-based I/O expansion requiring stable component supply across extended temperature ranges.

Supply support for 74HC597PW,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 logic, discrete, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for industrial, automotive, and computing markets.

The 74HC597 belongs to Nexperia's HC logic family - engineered for low-power, high-noise-immunity digital interfacing in space- and energy-constrained embedded systems requiring robust operation across wide temperature and supply ranges.

FAQ

What is the difference between STCP and SHCP in the 74HC597PW,118?

STCP (Storage Register Clock) captures parallel inputs D0–D7 into internal latches on its rising edge, isolating input sampling from shift activity. SHCP (Shift Register Clock) advances data through the 8-bit shift register on its rising edge, producing serial output at Q. This two-clock architecture prevents metastability and enables independent control of input capture and serial transmission timing.

Can the 74HC597PW,118 interface directly with 3.3 V microcontrollers?

Yes - the 74HC597PW,118 operates from 2.0 V to 6.0 V and has CMOS-compatible inputs with VIH ≥ 0.7×VCC. At VCC = 3.3 V, VIH(min) = 2.31 V, fully compatible with standard 3.3 V logic outputs. Its outputs drive to VOH ≥ 3.15 V (VCC = 3.3 V, IO = –4 mA), ensuring reliable high-level recognition by 3.3 V receivers.

Is the 74HC597PW,118 pin-compatible with the 74HC165?

No - the 74HC597PW,118 uses a TSSOP16 package with dedicated STCP, PL, and MR pins, while the 74HC165 uses a different functional architecture and pinout (e.g., CLK, CLKINH, SER instead of SHCP, STCP, PL). Direct replacement requires PCB redesign and firmware adaptation due to incompatible control signal mapping and absence of input latching in the 165.

Does the 74HC597PW,118 support hot insertion or live swapping?

No - the device lacks hot-swap protection circuitry such as power-on reset, I²C-style bus arbitration, or slew-rate controlled outputs. Applying VCC while signals are active may cause undefined states or excessive current flow. Power sequencing (VCC before inputs) and external current limiting are required for safe integration in field-serviceable modules.