Nexperia USA Inc. 74HC597D,653

Overview

74HC597D,653 from Nexperia is an 8-bit parallel-in/serial-out shift register with integrated input flip-flops and dual edge-triggered clocks (STCP for storage, SHCP for shifting). It features asynchronous master reset (MR), parallel load (PL), and serial data input (DS), operating across 2.0 V–6.0 V supply. Used in microcontroller I/O expansion and LED matrix scanning where synchronized parallel capture and serial streaming are required.

For engineers reviewing the 74HC597D,653 datasheet, 74HC597D,653 pinout, 74HC597D,653 application, or 74HC597D,653 equivalent, this device supports precise timing-critical data serialization with sub-35 ns propagation delay at 4.5 V, TTL-compatible variants (74HCT597), and industrial-grade temperature operation up to +125 °C.

Technical Context

The 74HC597D implements a two-stage register architecture: an 8-bit parallel-access input latch (clocked by STCP) feeding a serial-shift register (clocked by SHCP), both positive-edge triggered. Its MR input asynchronously clears the shift register, while PL enables direct parallel-to-shift transfer without intermediate clocking.

Input clamp diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors. The device complies with JEDEC JESD7A (2.0–6.0 V) and JESD8C (2.7–3.6 V), with HBM ESD rating >2000 V and CDM >1000 V - enabling robust operation in noisy industrial environments.

Key Specifications

Pinout & Package

74HC597D,653 is housed in a plastic small outline package (SO16, SOT109-1) with 16 leads and 3.9 mm body width - compatible with standard surface-mount reflow profiles and automated optical inspection.

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 74HCT597D,653 and SN74LV595AQPWRQ1, the 74HC597D,653 offers superior timing isolation between sampling and shifting domains, lower static power, and broader supply range - making it optimal for precision industrial data acquisition where clock domain separation is mandatory.

Availability

74HC597D,653 is available at Aetrix Electronics and suitable for microcontroller I/O expansion, LED matrix scanning, sensor data aggregation, and industrial bus interface applications requiring stable component supply across extended temperature ranges.

Supply support for 74HC597D,653 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 industrial and consumer systems.

The 74HC597 belongs to Nexperia's high-speed CMOS logic family, designed specifically for applications demanding precise timing control, low-power serialization, and robust operation in electrically noisy environments.

FAQ

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

The minimum pulse width (tW) for both STCP and SHCP is 16 ns at VCC = 4.5 V (20 ns at VCC = 6.0 V). This ensures full internal state transition without metastability. Pulse widths below this threshold risk incomplete register updates, especially under worst-case temperature and voltage conditions - verified per Table 7 in the official Nexperia datasheet Rev. 7.

Can 74HC597D,653 operate with a 3.3 V supply while interfacing to 5 V logic inputs?

Yes - its input clamp diodes permit safe connection to 5 V signals when used with current-limiting resistors (≥1 kΩ recommended). VIH is guaranteed at 2.1 V (min) for VCC = 3.3 V, ensuring reliable recognition of 5 V HIGH levels. However, output VOH will be ~3.1 V, so external level translation may be needed for driving 5 V loads.

How does the PL (parallel load) input interact with the shift register during active shifting?

When PL is asserted LOW, the entire 8-bit content of the storage register transfers immediately to the shift register - overriding any ongoing shift operation. This occurs asynchronously relative to SHCP, enabling zero-latency reinitialization of the serial stream without waiting for clock edges or clearing cycles.

Is there a recommended bypass capacitor value and placement for 74HC597D,653?

A 100 nF ceramic capacitor is recommended between VCC (pin 16) and GND (pin 8), placed within 5 mm of the IC with minimal trace inductance. This suppresses high-frequency supply noise generated during simultaneous output switching, preventing false clock triggering and ensuring stable tPLH/tPHL performance per Figure 6 timing diagrams.