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Home > Products > Integrated Circuits (ICs) > Logic > Shift Registers

Diodes Incorporated 74AHCT164T14-13

Name: 74AHCT164T14-13
Brand: Diodes Incorporated
SKU: 74AHCT164T14-13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74AHCT164T14-13

Manufacturer:: Diodes Incorporated

Category:: Shift Registers

Package:: 14-TSSOP (0.173", 4.40mm Width)

Datasheet:: 74AHCT164T14-13.pdf

Description:: LOGIC AHCT STD SO-14

Quantity:: RFQ Add To RFQ list

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Product details

Overview

74AHCT164T14-13 from Diodes Incorporated is an 8-bit serial-in, parallel-out edge-triggered shift register with TTL-compatible inputs, asynchronous master reset (MR), dual ANDed serial data inputs (DSA/DSB), and positive-edge clock (CP). It operates from 4.5V to 5.5V, delivers ±8mA drive at V_CC = 4.5V, and supports up to 125MHz clock frequency with 15pF load. It is used in PC peripheral interfaces for serial-to-parallel data conversion in legacy I/O expansion.

For engineers reviewing the 74AHCT164T14-13 datasheet, 74AHCT164T14-13 pinout, 74AHCT164T14-13 application, or 74AHCT164T14-13 equivalent, key selection criteria include asynchronous reset timing (t_rec = 2.5ns), setup/hold compliance (t_SU = 4.5ns, t_H = 2.0ns), output drive strength, and TSSOP-14 thermal profile for space-constrained PCB layouts.

Technical Context

The device implements eight cascaded D-type flip-flops with synchronous serial shifting and asynchronous active-low reset. Data enters Q0 on the rising edge of CP only when DSA and DSB are both HIGH (logically ANDed), enabling flexible enable/data gating. All outputs (Q0–Q7) update simultaneously on each clock edge.

Its Schmitt-trigger inputs improve noise immunity on serial and clock lines, while CMOS core ensures low static power (I_CC ≤ 4.0μA typical) and TTL-compatible input thresholds (V_IL ≤ 0.8V, V_IH ≥ 2.0V) for mixed-logic interfacing.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	4.5V to 5.5V - Ensures compatibility with standard 5V TTL/CMOS systems and stable operation across industrial temperature range.
Max Clock Frequency	125 MHz (CL = 15pF) - Supports high-speed serial loading in real-time I/O controllers without pipeline stalls.
Output Drive	±8 mA at V_CC = 4.5V - Sufficient to directly drive multiple 74-series inputs or LED indicators without external buffers.
Setup/Hold Time	t_SU = 4.5 ns, t_H = 2.0 ns - Enables reliable operation with fast microcontroller SPI peripherals or FPGA GPIOs.
Propagation Delay	t_PD = 3.4 ns (typ), 9.0 ns (max) - Guarantees deterministic timing alignment across all eight parallel outputs.
ESD Protection	2 kV HBM, 1 kV CDM - Meets IEC 61000-4-2 Level 2 for board-level handling and system integration robustness.

Pinout & Package

TSSOP-14 package: 4.9 mm × 4.4 mm × 1.1 mm body, 0.65 mm pitch, exposed pad optional, RoHS-compliant, halogen-free "Green" construction.

Pin/Terminal	Circuit Role	Design Meaning
1 (DSA)	Serial Data Input A	One input of AND gate feeding Q0; must be HIGH with DSB to enable data entry - enables hardware gating of serial stream.
2 (DSB)	Serial Data Input B	Second input of AND gate; tied HIGH if single-input mode used - provides flexible enable/data separation.
3 (Q0)	Stage 0 Output	First-stage parallel output; receives serial data on CP rising edge - serves as LSB in byte-aligned shift operations.
8 (CP)	Clock Pulse Input	Positive-edge triggered control signal; initiates simultaneous shift across all stages - defines timing boundary for data capture.
9 (MR)	Master Reset	Asynchronous active-low reset; forces all Q0–Q7 LOW independent of CP or data - ensures known state on power-up or fault recovery.
14 (V_CC)	Power Supply	+4.5V to +5.5V supply rail; decoupling required within 5 mm of pin - powers internal logic and output drivers.

Key Features

Feature	Design Value
Dual ANDed Serial Inputs	DSA and DSB logically ANDed before Q0 - allows one pin to act as hardware enable while the other carries data, simplifying control logic.
Asynchronous Master Reset	MR asserts independently of clock or data - guarantees immediate, deterministic initialization without waiting for clock edge.
TTL-Compatible Inputs	V_IH ≥ 2.0 V, V_IL ≤ 0.8 V - interoperates directly with legacy 5V microcontrollers and bus transceivers without level-shifting.
Schmitt-Trigger Inputs	Hysteresis on DSA, DSB, CP, MR - suppresses noise-induced false triggering on long traces or noisy environments.

Applications

PC Peripheral Expansion

Legacy Industrial I/O Module

Use Scenario: Adding GPIO capability to ISA or LPC-bus embedded controllers via serial configuration.

IC Role / Device Role / Timing Role: Serial-to-parallel converter synchronizing with host CPU clock edges to generate 8-bit parallel port signals.

Use Value: Eliminates need for dedicated parallel interface ICs; reduces BOM count and PCB area in cost-sensitive industrial PCs.

Use Scenario: Driving discrete relay banks or LED status arrays from microcontroller UART or bit-banged GPIO.

IC Role / Device Role / Timing Role: Output expander latching serial commands into stable parallel outputs for electro-mechanical actuation.

Use Value: Provides galvanically isolated output staging with precise timing control and low quiescent current (<4μA).

Optical Drive Control Logic

Set-Top Box Front Panel Interface

Use Scenario: Managing spindle motor enable, laser power, and tray open/close signals in DVD-ROM drives.

IC Role / Device Role / Timing Role: Shift register buffering command bytes from main SoC to analog driver stages with synchronized edge timing.

Use Value: Ensures glitch-free activation of high-current loads by eliminating race conditions between serial load and parallel output update.

Use Scenario: Decoding IR remote commands into parallel control bits for display backlight, audio mute, and channel select functions.

IC Role / Device Role / Timing Role: Parallel output latch receiving serialized IR decoder output under microcontroller firmware control.

Use Value: Reduces MCU pin count requirement while maintaining deterministic response latency (<11.5ns max t_PD).

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit serial-in parallel-out shift register applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74AHCT164PW	TSSOP-14 package, identical electrical specs and pinout - fully pin- and function-compatible.	No difference; same use cases and layout compatibility.	Select when TI-sourced supply chain or dual-sourcing strategy is required.
74LV164PW	Lower V_CC range (1.0–5.5V), reduced drive (±6mA), higher propagation delay (13ns max).	Suitable for mixed-voltage systems but not drop-in replacement in 5V-only designs requiring 125MHz operation.	Choose only if 3.3V/5V dual-rail operation is needed and speed margin allows.

Compared with SN74AHCT164PW and 74LV164PW, the 74AHCT164T14-13 offers guaranteed 125MHz operation at 5V, tighter timing margins, and Diodes' extended industrial temperature support (−40°C to +125°C), making it optimal for high-reliability 5V legacy systems.

Availability

74AHCT164T14-13 is available at Aetrix Electronics and suitable for PC peripheral expansion, optical drive control logic, and set-top box front panel interfaces requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant TSSOP packaging.

Supply support for 74AHCT164T14-13 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-standard logic and interface solutions for computing, consumer, and industrial markets.

The AHCT logic family targets 5V systems requiring TTL-compatible inputs, low power, and robust ESD performance - designed specifically for legacy infrastructure upgrades and cost-sensitive embedded control.

FAQ

Can 74AHCT164T14-13 operate reliably at 5.5V supply?

Yes. The device is rated for V_CC = 4.5V to 5.5V per its Recommended Operating Conditions. At 5.5V, VOH remains ≥4.4V (IOH = −50μA), VOL stays ≤0.1V (IOL = 50μA), and ICC increases to ≤80μA - all within specification limits across −40°C to +125°C.

What happens if only DSA is used and DSB is left floating?

Leaving DSB floating violates the Absolute Maximum Ratings and may cause undefined behavior due to input noise susceptibility. Per datasheet Note 9, unused inputs must be tied to V_CC or GND. For single-input operation, tie DSB to V_CC to enable DSA as the sole data path.

Is the master reset (MR) truly asynchronous and immune to clock glitches?

Yes. MR is asynchronous and overrides all other inputs including CP, DSA, and DSB. When asserted LOW, it forces Q0–Q7 to LOW immediately - no clock edge required. Recovery time (t_rec = 2.5ns) must elapse before the next CP edge to ensure stable operation.

Does this part support hot insertion or live plugging into powered systems?

No. The 74AHCT164T14-13 lacks hot-swap protection circuitry. Its absolute maximum ratings specify VI = −0.5V to +7.0V, but applying voltage to inputs before V_CC is stable risks latch-up or damage. Power sequencing per manufacturer guidelines is required.

74AHCT164T14-13 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: 74AHCT

Package/Case:: 14-TSSOP (0.173", 4.40mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Logic Type:: Shift Register

Output Type:: Push-Pull

Number of Elements:: 1

Number of Bits per Element:: 8

Function:: Serial to Parallel

Voltage - Supply:: 4.5V ~ 5.5V

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-TSSOP

74AHCT164T14-13 FAQ

1.How can I place an order for 74AHCT164T14-13 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74AHCT164T14-13 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 74AHCT164T14-13 reliable?

The price and inventory of 74AHCT164T14-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT164T14-13 is usually 5 days.

3.What payment methods are accepted for 74AHCT164T14-13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT164T14-13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74AHCT164T14-13?

74AHCT164T14-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74AHCT164T14-13 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 74AHCT164T14-13?

For technical support, including 74AHCT164T14-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT164T14-13 requirements.

6.How does Aetrix verify that 74AHCT164T14-13 is sourced from the original manufacturer or authorized distributors?

All 74AHCT164T14-13 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 74AHCT164T14-13 meets industry standards.

7.What is the process for return or replacement of 74AHCT164T14-13?

All 74AHCT164T14-13 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT164T14-13, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 74AHCT164T14-13 part is unused and in its original packaging.

Return procedure for 74AHCT164T14-13:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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