Nexperia USA Inc. 74HCT595D,118

Overview

74HCT595D,118 from Nexperia is an 8-bit serial-in/serial-or-parallel-out shift register with storage latch and 3-state outputs, designed for TTL-level input compatibility (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V at V_CC = 4.5–5.5 V), operating from −40 °C to +125 °C in SO16 package, and used in LED matrix drivers and microcontroller GPIO expansion.

For engineers reviewing the 74HCT595D,118 datasheet, 74HCT595D,118 pinout, 74HCT595D,118 application, or 74HCT595D,118 equivalent, key selection criteria include TTL-compatible input thresholds, 3-state output control via OE, cascading capability via Q7S, and guaranteed operation up to 52 MHz at 5 V.

Technical Context

The device implements two independent synchronous registers: an 8-stage shift register clocked by SHCP (LOW-to-HIGH edge) and a storage register clocked by STCP (LOW-to-HIGH edge), enabling asynchronous data latching. Data propagates serially through DS→Q0→Q1→…→Q7→Q7S with no internal feedback path between storage and shift stages.

Output enable (OE) is active-low and fully decoupled from register state - asserting OE HIGH places all eight parallel outputs (Q0–Q7) in high-impedance mode without altering stored data. MR is asynchronous reset, clearing only the shift register while leaving the storage register unaffected until next STCP edge.

Key Specifications

Pinout & Package

74HCT595D,118 uses the SO16 (SOT109-1) plastic small outline package: 16-pin, 3.9 mm body width, 1.27 mm pitch, gull-wing leads, 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 SN74HC595N and 74LV595PW, the 74HCT595D,118 uniquely delivers TTL-level input compatibility in a standard SO16 package with robust 6 mA drive and guaranteed 125 °C operation - making it optimal for industrial 5 V control systems requiring field-proven reliability and drop-in replaceability.

Availability

74HCT595D,118 is available at Aetrix Electronics and suitable for LED display drivers, microcontroller GPIO expansion, sensor data aggregation, and industrial I/O modules requiring stable component supply across automotive, factory automation, and outdoor electronics programs.

Supply support for 74HCT595D,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 leadership in logic, MOSFETs, and ESD protection.

The 74HCT595 belongs to Nexperia's industry-standard 74-series logic portfolio, engineered specifically for robust 5 V digital interfacing in harsh environments where signal integrity, latch stability, and long-term supply continuity are critical.

FAQ

What is the maximum recommended clock frequency for 74HCT595D,118 at 5 V?

The datasheet specifies f_MAX = 52 MHz for both SHCP and STCP at V_CC = 4.5–5.5 V and T_A = −40 °C to +125 °C. This is measured under defined test conditions (CL = 50 pF, RL = 1 kΩ) and represents the highest frequency at which setup/hold and propagation timing margins remain guaranteed across temperature and voltage extremes.

Can 74HCT595D,118 be used with a 3.3 V microcontroller?

Yes, but only if the MCU's 3.3 V HIGH output exceeds 2.0 V (minimum V_IH for 74HCT595). Most 3.3 V CMOS outputs meet this (e.g., STM32 GPIO ≈ 3.3 V), but open-drain or weak-drive interfaces may require a pull-up to 5 V on SHCP/STCP/OE/MR lines to ensure valid TTL thresholds.

How does the MR (Master Reset) pin affect the storage register?

MR resets only the shift register - Q0–Q7S are cleared to LOW, but the storage register (and thus Q0–Q7 outputs) retains its last latched value until the next STCP edge. This allows safe initialization of serial data path without disrupting active parallel outputs.

Is there a minimum pulse width requirement for SHCP or STCP?

Yes: t_W = 16 ns minimum for both clocks at V_CC = 5 V and T_A = −40 °C to +125 °C. This ensures reliable edge detection and internal state transition; shorter pulses risk metastability or skipped clock cycles, especially under worst-case voltage/temperature conditions.