Nexperia USA Inc. 74AHC594PW,112

Overview

74AHC594PW,112 from Nexperia is an 8-bit serial-in, parallel-out shift register with independent storage register, operating from 2.0 V to 5.5 V supply, featuring dual positive-edge-triggered clocks (SHCP and STCP), active-low asynchronous resets (SHR and STR), and cascading-capable serial output Q7S. It serves as a data serialization and latching interface in LED matrix drivers, I/O expanders, and industrial control logic.

For engineers reviewing the 74AHC594PW,112 datasheet, 74AHC594PW,112 pinout, 74AHC594PW,112 application, or 74AHC594PW,112 equivalent, this device supports high-speed serial-to-parallel conversion with precise timing control, Schmitt-trigger inputs for noise immunity, and operation across -40 °C to +125 °C - critical for automotive lighting controllers and programmable logic interfaces.

Technical Context

The device integrates two synchronized but independently clocked stages: an 8-bit shift register accepting serial data on DS with SHCP, and an 8-bit D-type storage register loaded via STCP. Both SHR and STR provide direct asynchronous reset paths without affecting the other stage's state.

Its CMOS architecture ensures balanced propagation delays (e.g., 3.8 ns typical SHCP→Q7S at VCC = 5.0 V, CL = 15 pF), overvoltage-tolerant inputs up to 5.5 V, and latch-up immunity exceeding 100 mA per JESD78 Class II Level A - enabling robust interfacing with mixed-voltage microcontrollers and legacy TTL systems.

Key Specifications

Pinout & Package

TSSOP16 plastic thin shrink small outline package (SOT403-1); 16 leads; body width 4.4 mm; 0.65 mm pitch; 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 74AHCT594PW,112, the AHC variant offers superior noise margin in mixed-signal environments; compared with SN74HC595PWR, it provides isolated reset control essential for fault-tolerant industrial sequencers.

Availability

74AHC594PW,112 is available at Aetrix Electronics and suitable for LED display drivers, industrial I/O expansion, and automotive lighting sequencers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74AHC594PW,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 optimized for efficiency, reliability, and miniaturization in automotive, industrial, and consumer applications.

The 74AHC series targets high-speed, low-power CMOS logic interoperability with legacy TTL systems, emphasizing robustness, wide voltage operation, and AEC-Q100-compliant variants for automotive use cases.

FAQ

Can 74AHC594PW,112 operate reliably at 3.3 V with 5 V-tolerant inputs?

Yes. The device is fully specified from 2.0 V to 5.5 V supply, and its inputs tolerate up to 5.5 V regardless of VCC level. At VCC = 3.3 V, VIH(min) = 2.31 V and VIL(max) = 1.16 V per datasheet Table 6, ensuring solid logic recognition when driven by 5 V microcontrollers or sensors.

What is the minimum pulse width required for SHCP and STCP?

The minimum high- and low-time for both SHCP and STCP is 5.5 ns at VCC = 4.5 V to 5.5 V (Table 7, tW). This allows reliable operation up to 90 MHz maximum frequency, provided PCB layout minimizes clock skew and maintains signal integrity below 10% rise/fall time degradation.

How does the Q7S output behave during cascading?

Q7S reflects the value shifted out of the most significant stage (Q7) of the shift register on each SHCP rising edge. When cascaded, Q7S connects directly to DS of the next device, enabling seamless multi-byte shift chains without external logic - verified in functional diagram Fig. 1 and timing Fig. 6.

Is thermal pad soldering required for the TSSOP16 package?

No. The SOT403-1 package has no exposed thermal pad; the bottom surface is molded plastic. Thermal performance relies on standard PCB copper pour under pins 8 (GND) and 16 (VCC), with recommended 2-layer board design per Nexperia's thermal guidelines for TSSOP packages.