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Nexperia USA Inc. 74HCT165DB,118
- Part No.:
- 74HCT165DB,118
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Shift Registers
- Package:
- -
- Datasheet:
-
74HCT165DB,118.pdf
- Description:
- NEXPERIA 74HCT165DB - PARALLEL I
- Quantity:
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Product details
Overview
74HCT165DB,118 from Nexperia is an 8-bit parallel-in/serial-out shift register with Schmitt-trigger inputs, 5 V tolerant inputs, and CMOS output stage. It operates from 4.5 V to 5.5 V, supports 25 MHz max clock frequency, and features asynchronous parallel load. It is used in industrial I/O expansion and microcontroller GPIO extension.
For engineers reviewing the 74HCT165DB,118 datasheet, 74HCT165DB,118 pinout, 74HCT165DB,118 application, or 74HCT165DB,118 equivalent, key selection criteria include input hysteresis, clock-to-Q propagation delay, supply voltage range, and compatibility with 5 V logic systems.
Technical Context
This shift register implements synchronous serial data conversion using a positive-edge-triggered clock (CP) and active-low parallel load (PL). Data is loaded in parallel on PL low and shifted out MSB-first on Q7 via the serial output (Q7S) with each CP rising edge.
It integrates Schmitt-trigger inputs on all control and data pins (CP, PL, DS, D0–D7), enabling noise immunity in electrically noisy environments. The output stage drives standard TTL loads and exhibits rail-to-rail CMOS voltage swing under 5 V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | HCT - TTL-compatible input thresholds with CMOS power efficiency and drive strength |
| Supply Voltage | 4.5 V to 5.5 V - Ensures robust operation across industrial 5 V rails with ±10% tolerance |
| Max Clock Frequency | 25 MHz at VCC = 5 V - Supports high-speed serial interface timing for microcontroller peripherals |
| Propagation Delay | 23 ns (CP to Q7S) - Enables precise timing alignment in synchronous data capture systems |
| Input Hysteresis | Typ. 0.9 V (Schmitt-trigger) - Rejects noise spikes up to ~1 V peak without false triggering |
| Output Drive | ±4 mA at VCC = 4.5 V - Sufficient to directly drive multiple 74-series TTL inputs or LED indicators |
Pinout & Package
74HCT165DB,118 is housed in a 16-pin SSOP (Shrink Small Outline Package) with 0.65 mm pitch, JEDEC MO-153 compliant, body width 3.9 mm, and thermal resistance θJA = 150 K/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (D0) | Parallel Data Input | LSB of 8-bit parallel word loaded when PL is low |
| 2 (D1) | Parallel Data Input | Second bit of parallel load sequence |
| 9 (D7) | Parallel Data Input | MSB of parallel load; determines first bit shifted out on Q7S |
| 10 (CP) | Clock Input | Positive-edge-triggered shift clock; advances internal register by one bit |
| 15 (PL) | Active-Low Load Control | Asynchronously loads D0–D7 into register when low; overrides shifting |
| 13 (Q7S) | Serial Output | MSB-first serial output; Q7 value appears after first CP rising edge post-load |
| 11 (DS) | Serial Data Input | Used for daisy-chaining; feeds into D0 of next stage during shift |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | Enables reliable operation in noisy industrial environments without external filtering |
| 5 V tolerant inputs | Accepts 5 V logic signals while powered from 4.5–5.5 V, simplifying mixed-voltage interfacing |
| Asynchronous parallel load | Allows immediate capture of external parallel data independent of clock phase or state |
| Standard CMOS outputs | Drives TTL and CMOS loads directly; eliminates need for level-shifting buffers |
Applications
| Industrial PLC I/O Expansion | Microcontroller GPIO Extension |
|---|---|
Use Scenario: Adding 8-bit digital input capability to a compact PLC module with limited MCU pins. IC Role / Device Role / Timing Role: Parallel capture of sensor status bits followed by synchronized serial streaming to MCU SPI interface. Use Value: Reduces PCB routing complexity and eliminates need for dedicated I/O expander ICs with I²C/SPI interfaces. | Use Scenario: Expanding input capability of an ARM Cortex-M0-based motor controller board. IC Role / Device Role / Timing Role: Capturing encoder quadrature signals and limit switch states in parallel, then shifting out for polling. Use Value: Achieves deterministic sampling of 8 inputs within one clock cycle, avoiding software debouncing overhead. |
| LED Matrix Column Driver | Legacy Bus Interface Adapter |
Use Scenario: Driving 8-column segments of a 16×8 LED display using multiplexed row scanning. IC Role / Device Role / Timing Role: Serially loaded column data shifted out synchronously with row select timing to minimize ghosting. Use Value: Enables precise column enable timing with sub-100 ns skew between outputs, critical for uniform brightness. | Use Scenario: Interfacing a vintage 8-bit parallel data bus (e.g., Z80-based system) to modern serial diagnostics hardware. IC Role / Device Role / Timing Role: Capturing parallel bus snapshots on address strobe and converting to UART-ready serial stream. Use Value: Provides deterministic 8-bit capture window aligned to bus control signals, eliminating metastability risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel-in/serial-out shift register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC165PWR | Same logic function but HC family; no Schmitt-trigger inputs; 2 V–6 V supply range | Lacks noise immunity in EMI-heavy environments; requires external RC filtering on control lines | Select when operating below 4.5 V or when cost sensitivity outweighs noise immunity needs |
| 74LV165PW,118 | LV family; 1.0 V–3.6 V supply; no Schmitt-trigger inputs; lower drive strength (±2 mA) | Not compatible with 5 V systems; unsuitable for direct connection to industrial sensors or legacy buses | Choose only for battery-powered 3.3 V embedded designs where ultra-low static current is critical |
Compared with SN74HC165PWR and 74LV165PW,118, the 74HCT165DB,118 uniquely delivers Schmitt-trigger noise immunity and guaranteed 5 V operation - essential for industrial control and legacy interface reliability.
Availability
74HCT165DB,118 is available at Aetrix Electronics and suitable for industrial PLCs, motor controllers, LED display drivers, and legacy bus adapters requiring stable component supply and long-term manufacturability.
Supply support for 74HCT165DB,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 standard logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74HCT series targets industrial and legacy-system applications where TTL-compatible input thresholds, 5 V operation, and noise-immune Schmitt-trigger inputs are mandatory design requirements.
FAQ
What is the minimum high-level input voltage (VIH) for reliable operation?
The 74HCT165DB,118 specifies VIH(min) = 2.0 V at VCC = 4.5 V and VIH(min) = 2.2 V at VCC = 5.5 V. Its Schmitt-trigger inputs provide hysteresis, so actual switching thresholds are ~1.5 V (VIL) and ~2.4 V (VIH) under typical conditions, ensuring noise margins >0.9 V.
Can the serial output (Q7S) be used to cascade multiple devices?
Yes. Q7S connects directly to the DS (data serial) input of the next 74HCT165DB,118 in daisy-chain configuration. Each device shifts its 8-bit word on successive clock edges, enabling 16-, 24-, or N×8-bit serial streams without additional logic.
Is the parallel load operation truly asynchronous?
Yes. When PL is pulled low, D0–D7 are latched into the internal register immediately, regardless of CP state or timing. This allows capture of transient parallel data without synchronization to the shift clock, supporting event-driven input sampling.
Does this device support hot insertion or live swapping?
No. The 74HCT165DB,118 lacks Ioff protection and bus-hold circuitry. Applying signals before VCC stabilization may cause latch-up or excessive current. Power sequencing per Nexperia's Application Note AN10862 must be observed for safe operation in modular systems.
74HCT165DB,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Output Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Function:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
74HCT165DB,118 FAQ
1.How can I place an order for 74HCT165DB,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT165DB,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 74HCT165DB,118 reliable?
The price and inventory of 74HCT165DB,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT165DB,118 is usually 5 days.
3.What payment methods are accepted for 74HCT165DB,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT165DB,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT165DB,118?
74HCT165DB,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT165DB,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 74HCT165DB,118?
For technical support, including 74HCT165DB,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT165DB,118 requirements.
6.How does Aetrix verify that 74HCT165DB,118 is sourced from the original manufacturer or authorized distributors?
All 74HCT165DB,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 74HCT165DB,118 meets industry standards.
7.What is the process for return or replacement of 74HCT165DB,118?
All 74HCT165DB,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT165DB,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 74HCT165DB,118 part is unused and in its original packaging.
Return procedure for 74HCT165DB,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HCT165DB,118 Tags
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74HC165D,653
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SN74LV165APWR
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