Nexperia USA Inc. 74HCT164PW/S400J

Overview

74HCT164PW/S400J from Nexperia is an 8-bit serial-in/parallel-out shift register with asynchronous clear, operating at 4.5–5.5 V supply, 20 ns propagation delay (typ.), and TTL-compatible inputs. It drives standard CMOS loads in industrial control logic, LED matrix scanning, and address latching circuits.

For engineers reviewing the 74HCT164PW/S400J datasheet, 74HCT164PW/S400J pinout, 74HCT164PW/S400J application, or 74HCT164PW/S400J equivalent, key selection factors include input threshold compatibility with 5 V TTL, guaranteed high-speed operation across temperature, and open-drain output capability for wired-OR bus interfacing.

Technical Context

This device implements a synchronous serial-to-parallel conversion using dual-input AND-gated data and clock paths, with independent active-low asynchronous reset. Its Schmitt-trigger inputs are absent; input thresholds follow standard HCT TTL levels (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V).

The output stage uses push-pull CMOS drivers rated for ±4 mA DC drive at V_CC = 5 V and supports fan-out of 10 LS-TTL loads. No internal pull-ups or level-shifting circuitry is present.

Key Specifications

Pinout & Package

TSSOP16 package (4.4 mm × 5.0 mm, 0.65 mm pitch), lead-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial-in/parallel-out shift register applications.

Compared with SN74HC164N, the 74HCT164PW/S400J offers tighter timing margin in high-speed 5 V systems; compared with 74LV164PW, it delivers stronger drive and stricter TTL-level compatibility at the cost of single-supply flexibility.

Availability

74HCT164PW/S400J is available at Aetrix Electronics and suitable for LED display control, industrial I/O expansion, and legacy microprocessor address latching requiring stable component supply and long-term industrial-grade availability.

Supply support for 74HCT164PW/S400J 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 focused on essential efficiency, delivering high-performance logic, discrete, and MOSFET solutions for automotive, industrial, and consumer applications.

The 74HCT series targets robust 5 V digital interfacing where TTL compatibility, noise immunity, and industrial temperature operation are mandatory design requirements.

FAQ

Is 74HCT164PW/S400J compatible with 3.3 V microcontrollers?

No - its inputs require minimum 2.0 V for logic HIGH and are optimized for 5 V TTL sources. Direct connection to 3.3 V GPIO may cause unreliable recognition of HIGH states. A level translator or series resistor with pull-up is required for safe interfacing.

Does this device support daisy-chaining multiple units?

Yes - Q7 output can drive the A/B inputs of a downstream 74HCT164PW/S400J. Clock and clear lines must be shared across all devices; propagation delay accumulates linearly (e.g., 2× units → ~40 ns total delay from first data in to last Q7 out).

What is the maximum recommended clock frequency?

The device supports up to 25 MHz under typical conditions (V_CC = 5 V, T_A = 25 °C), based on 20 ns propagation delay and setup/hold timing margins. At 125 °C, maximum usable frequency reduces to ~18 MHz due to increased delay variation.

Can CLR be left unconnected in normal operation?

No - CLR is active-low and internally un-biased. Leaving it floating risks unintended resets due to noise coupling. It must be pulled high via ≥10 kΩ resistor to V_CC or driven actively by system logic.