Nexperia USA Inc. 74AHCT595D,118

Overview

74AHCT595D,118 from Nexperia is an 8-bit serial-in/parallel-out shift register with storage latch and 3-state outputs, featuring separate shift (SHCP) and storage (STCP) clocks, asynchronous master reset (MR), and TTL-compatible inputs. It operates from 4.5 V to 5.5 V, supports −40 °C to +125 °C, and enables cascading via Q7S serial output - used in LED matrix drivers, I/O expansion for microcontrollers, and serial-to-parallel data conversion in industrial control panels.

For engineers reviewing the 74AHCT595D,118 datasheet, 74AHCT595D,118 pinout, 74AHCT595D,118 application, or 74AHCT595D,118 equivalent, key selection criteria include TTL-level input compatibility, 3-state output enable (OE) timing (enable/disable <13 ns at 5 V), propagation delay ≤10.5 ns (STCP→Qn, CL=50 pF), and SO16 package thermal performance up to +125 °C ambient.

Technical Context

The device implements two independent 8-bit registers: a shift register accepting serial data on DS at SHCP rising edges, and a storage register loaded on STCP rising edges. Output states are held stable during shifting, enabling glitch-free parallel updates. The 3-state outputs are controlled solely by OE (active LOW), with no effect on internal register states.

Input overvoltage tolerance to 5.5 V allows safe interfacing across mixed-voltage domains (e.g., 3.3 V MCU driving 5 V logic rails). Schmitt-trigger inputs provide robust noise immunity on clock and control lines, while latch-up immunity exceeds 100 mA per JESD78 Class II Level A.

Key Specifications

Pinout & Package

74AHCT595D,118 is supplied in SO16 (SOT109-1) plastic small outline package: 16-pin, 3.9 mm body width, 1.27 mm lead pitch, JEDEC MS-012 compliant.

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,652, the 74AHCT595D,118 offers guaranteed TTL input compatibility and faster propagation (≤10.5 ns vs. ≤21 ns), making it superior for mixed-signal interfacing; versus SN74LV595AQPWRQ1, it provides lower cost and simpler OE control but lacks automotive qualification.

Availability

74AHCT595D,118 is available at Aetrix Electronics and suitable for LED display drivers, microcontroller I/O expansion, industrial sensor interface modules, and remote control latching circuits requiring stable component supply across extended temperature ranges.

Supply support for 74AHCT595D,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 leading semiconductor manufacturer specializing in high-performance logic, analog, and MOSFET solutions, with global R&D and manufacturing facilities focused on reliability and efficiency.

The 74AHCT family targets industrial and automotive applications requiring robust TTL-compatible logic with wide voltage tolerance, high noise immunity, and extended temperature operation - designed specifically for legacy system upgrades and mixed-voltage interoperability.

FAQ

What is the maximum clock frequency supported by 74AHCT595D,118?

The device supports up to 130 MHz typical and 90 MHz minimum (−40 °C to +125 °C) for both SHCP and STCP inputs at VCC = 4.5–5.5 V. This is verified by propagation delay measurements (STCP→Qn ≤10.5 ns at CL = 50 pF) and pulse width requirements (tW ≥5.0 ns for SHCP/STCP/MR).

Can 74AHCT595D,118 operate with a 3.3 V supply?

No - the 74AHCT595D,118 is specified only for VCC = 4.5 V to 5.5 V. Its TTL-compatible inputs require VIH ≥2.0 V, but internal logic and output drive strength are not characterized below 4.5 V. For 3.3 V operation, use the pin-compatible 74AHC595D variant instead.

How does the master reset (MR) pin affect the storage register?

The MR pin resets only the 8-bit shift register (stages 0–7) to zero; it has no effect on the storage register contents or parallel outputs. Outputs retain their last latched state until the next STCP rising edge transfers new data - ensuring output stability during reset events.

Is cascading multiple 74AHCT595D,118 devices supported?

Yes - the Q7S serial output is designed explicitly for daisy-chaining: connect Q7S of one device to DS of the next, while sharing SHCP and STCP. OE and MR can be ganged globally. Propagation delay through Q7S (≤10.0 ns) ensures reliable multi-stage timing at ≤90 MHz clock rates.