Diodes Incorporated 74AHC164S14-13

Overview

74AHC164S14-13 from Diodes Incorporated is an 8-bit serial-in/parallel-out edge-triggered shift register with dual ANDed serial inputs (DSA/DSB), asynchronous master reset (MR), and CMOS-compatible operation across 2.0V–5.5V supply. It delivers 8mA drive strength at 4.5V, supports up to 175MHz clock frequency (VCC = 4.5–5.0V, CL = 15pF), and features Schmitt-trigger inputs for noise immunity-used in PC peripheral data serialization and optical drive control logic.

For engineers reviewing the 74AHC164S14-13 datasheet, 74AHC164S14-13 pinout, 74AHC164S14-13 application, or 74AHC164S14-13 equivalent, key selection criteria include its dual-input AND logic for flexible enable/data gating, guaranteed 5ns minimum clock pulse width, 4.5ns typical propagation delay (VCC = 4.5V), and SO-14 package compatibility with legacy 74-series footprint layouts.

Technical Context

The 74AHC164S14-13 implements a synchronous 8-stage D-type flip-flop chain with positive-edge clock (CP) triggering and asynchronous active-low master reset (MR). Data enters Q0 only when both DSA and DSB are HIGH, enabling one pin to serve as data and the other as enable-or both tied together for single-input operation.

Its internal logic enforces strict setup (4.5ns min @ 4.5V) and hold (2.0ns min @ 4.5V) timing relative to CP rising edge, and guarantees full output reset to LOW independent of CP or data state when MR is asserted. All inputs include Schmitt-trigger action, supporting slow-rising or noisy signals without oscillation.

Key Specifications

Pinout & Package

74AHC164S14-13 is housed in a 14-pin Small Outline (SO-14) package with 1.27mm pitch, JEDEC MS-012AC compliant, and surface-mount compatible with standard reflow profiles.

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 SN74HC164DR and 74LV164PW, the 74AHC164S14-13 uniquely combines 175MHz speed, Schmitt-trigger robustness, and SO-14 footprint compatibility-making it optimal for noise-prone, mixed-voltage embedded control where timing margin and layout reuse matter.

Availability

74AHC164S14-13 is available at Aetrix Electronics and suitable for PC peripheral interface, optical drive control, set-top box IR decoding, and industrial panel display driver applications requiring stable component supply, long-term manufacturability, and RoHS-compliant sourcing.

Supply support for 74AHC164S14-13 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, industry-qualified components for computing, consumer, and industrial markets.

The 74AHC logic family targets high-speed, low-power, mixed-voltage digital interfacing-designed specifically for applications needing robust noise immunity, wide supply tolerance, and pin-for-pin compatibility with legacy 74-series functions.

FAQ

Can DSA and DSB be used independently for different control signals?

No-they are internally ANDed, so both must be HIGH for data to propagate to Q0. One pin can serve as an enable (tied HIGH or controlled) while the other carries serial data, but neither operates independently as a separate functional input. This architecture prevents spurious shifts during enable transitions.

What happens to Q outputs during MR assertion?

All Q0–Q7 outputs go LOW asynchronously and immediately upon MR going LOW, overriding CP, DSA, and DSB states. Outputs remain LOW until MR returns HIGH and at least one valid CP rising edge occurs-no clock cycles are consumed during reset recovery.

Is the SO-14 package thermally compatible with lead-free reflow?

Yes-the SO-14 package (S14) is qualified for lead-free reflow per J-STD-020, with peak temperature rating of 260°C for 10 seconds. Its thermal resistance (θJA ≈ 120°C/W) supports continuous operation at 125°C ambient when properly mounted on 2-layer PCBs with ≥1 cm² copper pour.

Does the 74AHC164S14-13 support hot insertion?

No-hot insertion is not supported. The device lacks power-on reset circuitry or input protection for live backplane insertion. Applying VCC before GND, or asserting CP/MR before supply stabilization, may cause latch-up or undefined output states per Absolute Maximum Ratings.