Nexperia USA Inc. 74HC597D,652

Overview

74HC597D,652 from Nexperia is an 8-bit parallel-in/serial-out shift register with input flip-flops, featuring dual positive-edge-triggered clocks (STCP for storage, SHCP for shifting), asynchronous master reset (MR), and parallel load (PL). It operates from 2.0 V to 6.0 V, supports -40 °C to +125 °C ambient range, and delivers 35 ns propagation delay at 6.0 V - used in industrial I/O expansion and microcontroller peripheral interfacing where synchronized data capture and serial stream generation are required.

For engineers reviewing the 74HC597D,652 datasheet, 74HC597D,652 pinout, 74HC597D,652 application, or 74HC597D,652 equivalent, this device serves as a robust, CMOS-level-compatible shift register for reliable parallel-to-serial conversion in noise-prone embedded control systems, especially where latch timing integrity and supply voltage flexibility (2.0–6.0 V) are critical selection criteria.

Technical Context

The 74HC597D,652 implements a two-stage architecture: an 8-bit parallel-access storage register feeding into an 8-bit serial-shift register. Both registers use independent, positive-edge-triggered clocks - STCP loads parallel inputs (D0–D7) into latches, while SHCP advances the shift register and updates Q output. The MR input asynchronously clears the shift register, and PL enables direct transfer of latched data into the shift register.

Input clamp diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors. Its CMOS logic family ensures low static power consumption (<160 µA ICC at 6.0 V, -40 °C to +125 °C), high noise immunity, and compatibility with standard 5 V TTL logic levels only in the 74HCT variant - the 74HC597D uses true CMOS input thresholds.

Key Specifications

Pinout & Package

74HC597D,652 is housed in a plastic small outline package (SO16, SOT109-1) with 16 leads and 3.9 mm body width - suitable for automated surface-mount assembly and moderate-power thermal dissipation (500 mW max, derated above 110 °C).

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, the 74HC597D,652 offers superior noise immunity in mixed-signal environments due to higher VIH/VIL ratios; compared with SN74LV595APWR, it provides deterministic input capture via dual clocks and a dedicated MR pin - essential for fault-tolerant industrial control.

Availability

74HC597D,652 is available at Aetrix Electronics and suitable for industrial I/O expansion, microcontroller peripheral interface, automotive body control modules, and test equipment data capture requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC597D,652 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 logic, analog, and MOSFET solutions with focus on efficiency, miniaturization, and robustness for industrial and automotive markets.

The 74HC597 belongs to Nexperia's 74HC logic family - engineered for low-power, wide-supply-voltage operation in noise-sensitive embedded systems where timing predictability and latch integrity are critical.

FAQ

What is the difference between STCP and SHCP in the 74HC597D,652?

STCP (Storage Register Clock) captures parallel inputs D0–D7 into internal latches on its rising edge, decoupling sampling from shifting. SHCP (Shift Register Clock) advances the shift register and updates the Q output on its rising edge. This dual-clock architecture prevents metastability and allows independent control of data acquisition and serial transmission timing.

Can the 74HC597D,652 operate reliably at 3.3 V supply?

Yes - the 74HC597D,652 is fully specified from 2.0 V to 6.0 V. At 3.3 V, VIH is 2.31 V (min), VIL is 1.09 V (max), and typical propagation delay is 25 ns (SHCP to Q), supporting clock frequencies up to ~20 MHz. All DC and AC parameters remain valid across this range per Table 5.

Does the 74HC597D,652 support daisy-chaining for more than 8 bits?

Yes - connect Q of one device to DS of the next, and synchronize all SHCP and STCP lines. PL and MR can be ganged across devices for simultaneous load or reset. The serial output retains full timing integrity across chains, with cumulative delay scaling linearly (e.g., two devices add ~32 ns at 6.0 V).

Is the 74HC597D,652 pin-compatible with the 74HC165?

No - the 74HC597D,652 has 16-pin SO16 packaging with dedicated STCP, SHCP, PL, and MR pins, while the 74HC165 uses a different pinout (e.g., CLK, CLK INH, SER, Q7) and lacks parallel load and dual-clock separation. Functional overlap exists, but PCB layout and firmware timing logic are not interchangeable.