Nexperia USA Inc. 74AHC164D,112

Overview

74AHC164D,112 from Nexperia is an 8-bit serial-in/parallel-out CMOS shift register with dual serial inputs (DSA and DSB), eight buffered parallel outputs (Q0–Q7), edge-triggered clock (CP), active-low master reset (MR), and overvoltage-tolerant inputs up to 5.5 V. It operates from 2.0 V to 5.5 V and supports mixed-voltage interfacing in industrial control and LED driver expansion circuits.

For engineers reviewing the 74AHC164D,112 datasheet, 74AHC164D,112 pinout, 74AHC164D,112 application, or 74AHC164D,112 equivalent, this device is selected for synchronous data serialization in microcontroller GPIO-expansion systems, where low-power operation, Schmitt-trigger input noise immunity, and -40 °C to +125 °C temperature stability are required.

Technical Context

The 74AHC164D implements a synchronous 8-stage shift register using positive-edge-triggered D flip-flops, with independent serial data enable logic: either DSA or DSB may serve as an active-HIGH gate for the other input. The MR input asynchronously clears all stages to LOW, overriding clock and data.

Its input structure includes Schmitt-trigger action on all pins, enabling robust noise rejection, while overvoltage tolerance (up to 5.5 V) allows safe interfacing with 5 V logic even when powered at 3.3 V. Propagation delays range from 4.5 ns (VCC = 5 V, CL = 15 pF) to 16.0 ns (VCC = 3.3 V, CL = 50 pF), supporting maximum clock frequencies up to 175 MHz under optimal conditions.

Key Specifications

Pinout & Package

74AHC164D,112 is supplied in SO14 (SOT108-1) plastic small outline package: 14-pin, 3.9 mm body width, 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 74AHCT164D,112, the 74AHC164D,112 offers superior noise immunity and broader voltage translation capability, while SN74HC164DR trades input robustness for marginally higher VCC headroom - making the AHC variant optimal for modern mixed-signal industrial interfaces.

Availability

74AHC164D,112 is available at Aetrix Electronics and suitable for industrial automation controllers, LED display subsystems, and embedded sensor interface modules requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for 74AHC164D,112 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 high-volume, high-reliability logic, analog, and discrete components, with manufacturing rooted in process technology leadership and automotive-grade quality systems.

The 74AHC164D,112 belongs to Nexperia's AHC logic family - engineered for low-power, high-speed, mixed-voltage interoperability in industrial and consumer equipment where signal integrity and thermal resilience are critical.

FAQ

What is the minimum pulse width required on the CP and MR inputs?

The minimum HIGH and LOW pulse widths for both CP and MR are 5.0 ns across the full operating range (VCC = 3.0–5.5 V, TA = -40 °C to +125 °C). This ensures reliable edge detection and asynchronous reset activation without metastability or missed transitions, even at maximum rated frequency.

Can DSA and DSB be used simultaneously for data input?

No - DSA and DSB are logically ANDed internally; only one may be active (HIGH) at a time to enable data entry through the other. Simultaneous HIGH on both inputs blocks data shifting. This dual-input architecture provides flexible gating, not concurrent data paths.

Is the SO14 package (SOT108-1) lead-free and RoHS compliant?

Yes - the 74AHC164D,112 in SO14 packaging meets RoHS Directive 2011/65/EU and is manufactured with lead-free terminations and halogen-free molding compound, verified per Nexperia's compliance documentation dated March 2024.

How does the Schmitt-trigger input affect timing parameters like tsu and th?

Schmitt-trigger inputs do not alter specified set-up (tsu = 4.5 ns min) or hold (th = 2.0 ns min) times - these values are measured relative to the defined switching threshold (VM = 0.5 × VCC), not the hysteresis band. The trigger improves noise margin but does not relax timing constraints.