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

Nexperia USA Inc. 74AHCT164PW,118

Name: 74AHCT164PW,118
Brand: Nexperia USA Inc.
SKU: 74AHCT164PW,118
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74AHCT164PW,118

Manufacturer:: Nexperia USA Inc.

Category:: Shift Registers

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

Datasheet:: 74AHCT164PW,118.pdf

Description:: IC 8BIT SHIFT REGISTER 14TSSOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

74AHCT164PW,118 from Nexperia is an 8-bit serial-in/parallel-out shift register with TTL-compatible inputs, dual serial data inputs (DSA and DSB), eight parallel outputs (Q0–Q7), edge-triggered clock (CP) on LOW-to-HIGH transitions, and active-LOW master reset (MR). It operates from 4.5 V to 5.5 V over –40 °C to +125 °C and supports mixed-voltage translation via overvoltage-tolerant inputs up to 5.5 V. Used in LED matrix drivers and microcontroller GPIO expansion.

For engineers reviewing the 74AHCT164PW,118 datasheet, 74AHCT164PW,118 pinout, 74AHCT164PW,118 application, or 74AHCT164PW,118 equivalent, this page delivers verified functional behavior, timing constraints (e.g., t_su = 4.5 ns, t_pd ≤ 11.5 ns @ 5 V), package-specific thermal derating (7.3 mW/K above 81 °C), and direct substitution guidance for industrial control and display interface designs.

Technical Context

This device implements a synchronous 8-stage shift register using positive-edge-triggered D flip-flops with asynchronous active-LOW reset. Data enters serially through either DSA or DSB, with one input acting as an enable for the other - enabling flexible data gating without external logic. The register propagates data on each rising CP edge, with output states updated simultaneously after propagation delay.

All inputs feature Schmitt-trigger action for noise immunity, and the overvoltage-tolerant input structure (up to 5.5 V) allows interfacing with higher-voltage logic while powered at 5 V. Output drive strength is specified at ±8 mA, supporting direct connection to LEDs or standard CMOS/TTL loads without buffering.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Family	74AHCT - TTL-input compatible, 5 V supply only (4.5–5.5 V)
Function	8-bit serial-in/parallel-out shift register with dual data inputs and async reset
Propagation Delay (t_pd)	≤11.5 ns max @ VCC = 5 V, CL = 50 pF - determines max clock rate (~65 MHz) in clean layouts
Set-up Time (t_su)	4.5 ns min @ VCC = 5 V - constrains minimum data hold before CP rising edge
Supply Range	4.5 V to 5.5 V - excludes 3.3 V operation; not compatible with mixed 3.3/5 V systems without level shifting
Operating Temperature	–40 °C to +125 °C - qualified for under-hood automotive and industrial environments
Input Voltage Tolerance	Up to 5.5 V independent of VCC - enables safe interfacing with 5 V signals even during power sequencing

Pinout & Package

TSSOP14 plastic thin shrink small outline package (SOT402-1); 14-lead, 4.4 mm body width, 0.65 mm pitch; exposed pad not electrically connected.

Pin/Terminal	Circuit Role	Design Meaning
1 (DSA)	Serial data input A	Primary serial input; enabled when DSB = HIGH; accepts TTL-level signals
2 (DSB)	Serial data input B	Secondary serial input; acts as enable for DSA when HIGH; same electrical specs as DSA
3 (Q0)	Parallel output 0	LSB output; driven after first CP edge following valid data entry
4 (Q1)	Parallel output 1	Second stage output; shifts in sequence with Q0–Q7 on successive clocks
5 (Q2)	Parallel output 2	Third stage output; synchronized to CP rising edge with fixed t_pd
6 (Q3)	Parallel output 3	Fourth stage output; all Qx outputs update simultaneously post-propagation
7 (GND)	Ground reference	0 V return path; must be low-impedance for stable timing and noise immunity
8 (CP)	Clock input	Rising-edge triggered; requires ≥5.0 ns pulse width HIGH/LOW for reliable operation
9 (MR)	Master reset	Asynchronous active-LOW; forces Q0–Q7 LOW regardless of CP or data state
10 (Q4)	Parallel output 4	Fifth stage output; part of contiguous 8-bit parallel bus (Q0–Q7)
11 (Q5)	Parallel output 5	Sixth stage output; no internal latching - output reflects current register state
12 (Q6)	Parallel output 6	Seventh stage output; directly usable for driving discrete loads (e.g., LED anodes)
13 (Q7)	Parallel output 7	MSB output; final shifted bit; used for daisy-chaining or status indication
14 (VCC)	Supply voltage	+5 V nominal; decoupling capacitor (100 nF) required within 10 mm of pin

Key Features

Feature	Design Value
Dual serial data inputs with mutual enable logic	Eliminates need for external AND gate when selecting between two serial sources
TTL-compatible input thresholds (VIH = 2.0 V, VIL = 0.8 V @ 5 V)	Direct interface with legacy 5 V microcontrollers and logic without level shifters
Overvoltage-tolerant inputs (up to 5.5 V)	Prevents latch-up during hot-insertion or supply sequencing mismatches
High noise immunity via Schmitt-trigger inputs	Supports reliable operation in electrically noisy industrial environments (e.g., motor drives)
–40 °C to +125 °C operating range	Validated for extended temperature applications including automotive body control modules

Applications

LED Matrix Driver

Microcontroller GPIO Expander

Use Scenario: Driving 8×8 monochrome LED displays using SPI-like serial control from an MCU with limited I/O.

IC Role / Device Role / Timing Role: Serial-to-parallel converter that translates MCU's serial clock/data into parallel column/row activation signals.

Use Value: Reduces MCU pin count by 6 (vs. direct 8-bit port), maintains precise timing via fixed t_pd and edge-triggered CP, and tolerates 5 V LED supply rails.

Use Scenario: Extending digital I/O capability of an ARM Cortex-M0+ MCU in a programmable logic controller (PLC) baseboard.

IC Role / Device Role / Timing Role: Synchronous peripheral providing deterministic 8-bit parallel output controlled by software-configured shift sequences.

Use Value: Enables predictable timing for real-time I/O updates (t_su/t_h guaranteed), supports hot-swap-safe input tolerance, and fits compact TSSOP footprint.

Industrial Serial Bus Interface

Legacy System Protocol Translator

Use Scenario: Converting RS-485 half-duplex serial commands into parallel control bits for solenoid driver ICs in factory automation.

IC Role / Device Role / Timing Role: Protocol-agnostic shift register synchronizing incoming serial bits to local system clock domain via CP.

Use Value: Provides galvanically isolated serial input compatibility (via external transceiver), deterministic setup/hold margins, and MR-based emergency shutdown.

Use Scenario: Interfacing a vintage 5 V TTL UART controller with a modern 5 V FPGA design requiring parallel status flags.

IC Role / Device Role / Timing Role: Level-translation buffer and serialization point ensuring signal integrity across mixed-logic-generation boundaries.

Use Value: Eliminates need for discrete level shifters due to 5.5 V input tolerance, preserves timing integrity with <12 ns t_pd, and supports full industrial temp range.

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
74AHC164PW,118	CMOS-input version; VIH = 3.85 V @ 5.5 V; wider VCC range (2.0–5.5 V)	Requires 3.3 V or 5 V logic source; unsuitable for pure TTL systems	Select when interfacing with 3.3 V MCUs or mixed-supply systems needing broader VCC flexibility
SN74HC164PWR	TI part; identical function but different AC specs (t_pd = 25 ns @ 6 V); no overvoltage tolerance	Lacks 5.5 V input rating; requires strict 5 V signaling; lower max f_max	Choose only if TI qualification requirements apply; avoid in hot-plug or mixed-voltage contexts

Compared with 74AHC164PW,118 and SN74HC164PWR, the 74AHCT164PW,118 uniquely combines TTL input compatibility, 5.5 V overvoltage tolerance, and sub-12 ns propagation delay - making it optimal for robust 5 V industrial interfaces where signal integrity and supply margin are critical.

Availability

74AHCT164PW,118 is available at Aetrix Electronics and suitable for LED matrix drivers, microcontroller GPIO expansion, industrial serial bus interfaces, and legacy system protocol translators requiring stable component supply across extended temperature ranges.

Supply support for 74AHCT164PW,118 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 MOSFET solutions for automotive, industrial, and consumer markets.

The 74AHCT164 belongs to Nexperia's Automotive & Industrial Logic family, designed specifically for robust serial-to-parallel conversion in harsh environments with guaranteed operation from –40 °C to +125 °C and stringent ESD performance.

FAQ

Is 74AHCT164PW,118 compatible with 3.3 V microcontrollers?

No - the 74AHCT164 is TTL-input compatible and specified only for 4.5 V to 5.5 V supply. Its VIH threshold is 2.0 V minimum, but 3.3 V logic may not reliably meet noise margins or drive strength requirements. Use 74AHC164PW,118 instead for true 3.3 V operation with CMOS inputs.

What is the purpose of the dual serial inputs (DSA and DSB)?

DSA and DSB provide hardware-selectable serial data paths: when DSB is HIGH, DSA is enabled as the active input; when DSA is HIGH, DSB is enabled. This eliminates external gating logic for multiplexing two serial sources, reducing board area and propagation delay in time-critical paths.

Does the TSSOP14 package require soldering the exposed pad?

No - the TSSOP14 (SOT402-1) package for 74AHCT164PW,118 has no thermal pad. The mechanical footprint matches JEDEC MO-153, and thermal performance relies solely on lead conduction. No thermal vias or pad soldering is needed or recommended.

Can MR (master reset) be left unconnected in normal operation?

No - MR is an active-LOW asynchronous input with no internal pull-up. Leaving it floating risks unintended resets due to noise. It must be pulled HIGH via a 10 kΩ resistor to VCC or driven actively by system logic to ensure stable operation.

74AHCT164PW,118 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

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

74AHCT164PW,118 FAQ

1.How can I place an order for 74AHCT164PW,118 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74AHCT164PW,118 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 74AHCT164PW,118 reliable?

The price and inventory of 74AHCT164PW,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT164PW,118 is usually 5 days.

3.What payment methods are accepted for 74AHCT164PW,118?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT164PW,118 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74AHCT164PW,118?

74AHCT164PW,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74AHCT164PW,118 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 74AHCT164PW,118?

For technical support, including 74AHCT164PW,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT164PW,118 requirements.

6.How does Aetrix verify that 74AHCT164PW,118 is sourced from the original manufacturer or authorized distributors?

All 74AHCT164PW,118 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 74AHCT164PW,118 meets industry standards.

7.What is the process for return or replacement of 74AHCT164PW,118?

All 74AHCT164PW,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT164PW,118, 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 74AHCT164PW,118 part is unused and in its original packaging.

Return procedure for 74AHCT164PW,118:

1.Submit a request within 90 days.

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

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