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Nexperia USA Inc. 74HCT165BQ,115
- Part No.:
- 74HCT165BQ,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Shift Registers
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
74HCT165BQ,115.pdf
- Description:
- IC 8BIT SHIFT REGISTER 16-DHVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:8,737
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Product details
Overview
74HCT165BQ,115 from Nexperia is an 8-bit parallel-in/serial-out shift register with TTL-compatible inputs, asynchronous parallel load (PL), synchronous serial shift (CP/CE), complementary Q7/Q7 outputs, and overvoltage-tolerant inputs up to 15 V - used in microcontroller GPIO expansion and industrial I/O bridging where level shifting and compact packaging are required.
For engineers reviewing the 74HCT165BQ,115 datasheet, 74HCT165BQ,115 pinout, 74HCT165BQ,115 application, or 74HCT165BQ,115 equivalent, this device supports high-speed parallel-to-serial conversion at up to 44 MHz (VCC = 4.5 V), operates across -40 °C to +125 °C, and delivers robust noise immunity with CMOS-level power efficiency in a space-constrained DHVQFN16 package.
Technical Context
This shift register implements an 8-stage static shift register with dual-path output logic: Q7 provides the MSB of the serial stream while Q7 supplies its logical complement. Its asynchronous PL input enables immediate capture of parallel data (D0–D7) independent of clock timing, and CE-controlled CP gating allows precise synchronization of serial shifting without spurious transitions.
The device uses standard CMOS silicon with TTL-level input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V), enabling direct interfacing with legacy 5 V microcontrollers and FPGAs. Input overvoltage tolerance (up to 15 V) permits safe use in mixed-voltage systems where 3.3 V logic drives 5 V bus lines via level-shifting configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74HCT - TTL-compatible input thresholds ensure interoperability with 5 V MCU I/O without external level shifters. |
| Supply Voltage Range | 4.5 V to 5.5 V - matches standard 5 V rail; avoids undervoltage lockout or overvoltage stress in industrial power domains. |
| Max Clock Frequency | 44 MHz at VCC = 4.5 V - supports >1 Mbps serial data throughput for real-time sensor aggregation or LED matrix control. |
| Propagation Delay | 17 ns (PL→Q7), 34 ns (CP→Q7) at VCC = 4.5 V - enables tight timing margins in synchronous digital subsystems. |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood automotive ECUs, motor drives, and outdoor industrial controllers. |
| Input Overvoltage Tolerance | 15 V on all inputs - eliminates need for external clamping diodes when interfacing with higher-voltage sensors or buses. |
| ESD Rating | HBM >2000 V, CDM >1000 V - meets IEC 61000-4-2 Level 3 for robust handling in automated PCB assembly lines. |
Pinout & Package
DHVQFN16 (SOT763-1) package: 2.5 × 3.5 × 0.85 mm body, 16-terminal leadless quad flat design with exposed thermal pad (non-soldered by default); optimized for high-density PCB layouts and improved thermal dissipation over SO16/TSSOP variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (PL) | Asynchronous parallel load enable | Active-LOW signal that immediately latches D0–D7 into register regardless of clock state - critical for synchronized data capture from sensors or switches. |
| 2 (CP) | Clock input | LOW-to-HIGH edge-triggered; advances shift register only when CE = LOW - enables precise bit-aligned serial streaming. |
| 7 (Q7) | Serial output (MSB) | Provides final stage output of shift register; used as primary serial data path to MCU UART/SPI peripherals. |
| 9 (Q7) | Complementary serial output | Logical inverse of Q7; supports differential signaling or active-LOW logic interfaces without external inverters. |
| 10 (DS) | Serial data input | Feeds new bit during serial shift mode; tied to Q7 of upstream device in daisy-chained configurations. |
| 11–14, 3–6 (D0–D7) | Parallel data inputs | Eight independent inputs accepting parallel byte; mapped directly to physical I/O pins on microcontrollers or FPGA banks. |
| 15 (CE) | Clock enable | Active-LOW gate controlling CP sensitivity - prevents unintended shifts during interrupt service or bus arbitration. |
| 16 (VCC) | Positive supply | 5 V nominal supply; decoupling capacitor placement near this pin is mandatory to suppress switching noise in high-frequency operation. |
| 8 (GND) | Ground reference | Primary return path for all internal logic; must be connected to low-impedance system ground plane to maintain noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Asynchronous parallel load | Enables zero-latency capture of 8-bit status registers (e.g., encoder positions or switch states) without waiting for clock edges. |
| TTL-compatible inputs | Accepts standard 5 V logic thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), eliminating level-shifter ICs when interfacing with legacy MCUs. |
| Overvoltage-tolerant inputs | Withstands up to 15 V on all pins - allows safe connection to 12 V sensor outputs or open-collector bus lines without protection circuitry. |
| Dual complementary outputs | Q7 and Q7 provide matched rise/fall times and simultaneous access to true/complement signals - simplifies driving differential receivers or active-LOW loads. |
| Extended temperature range | Rated from -40 °C to +125 °C - validated for continuous operation in engine control units, solar inverters, and factory automation PLCs. |
Applications
| Industrial I/O Expansion | Microcontroller GPIO Multiplexing |
|---|---|
|
Use Scenario: Adding 8-bit parallel input capability to a resource-constrained ARM Cortex-M0+ MCU with limited GPIO count. IC Role / Device Role / Timing Role: Acts as parallel-to-serial bridge; PL captures switch bank state synchronously, then CP/CE clocks bits out to MCU's hardware SPI RX line. Use Value: Reduces required MCU pins from 8 to 3 (PL, CP, DS) while maintaining deterministic sampling timing via hardware-controlled load/shift sequence. |
Use Scenario: Driving a 64-LED dot-matrix display using a single 8-bit MCU port and cascaded shift registers. IC Role / Device Role / Timing Role: Serial-in/parallel-out stage receiving data from upstream 74HCT165; Q7 feeds next device's DS, while D0–D7 drive column drivers. Use Value: Enables full 8×8 refresh at >100 Hz using only one MCU output pin per chain, with no software bit-banging overhead. |
| Automotive Sensor Interface | Legacy Bus Level Translation |
|
Use Scenario: Reading 8-channel analog sensor outputs digitized by external ADCs in an automotive body control module. IC Role / Device Role / Timing Role: Parallel-in shift register capturing ADC result bus on PL assertion; serial output fed to CAN controller's SPI interface. Use Value: Isolates noisy analog domain from digital bus; 125 °C rating ensures reliability in under-dash environments with minimal thermal derating. |
Use Scenario: Interfacing a 3.3 V FPGA to a 5 V industrial RS-485 transceiver requiring TTL-level control signals. IC Role / Device Role / Timing Role: Level-shifting buffer: FPGA drives PL/CP/DS at 3.3 V, while 74HCT165 outputs swing full 5 V to meet transceiver VIH/VIL specs. Use Value: Eliminates discrete MOSFET translators; 15 V input tolerance prevents latch-up if FPGA IO shorts to 12 V supply during fault conditions. |
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 |
|---|---|---|---|
| 74HC165BQ,115 | CMOS-input variant (VIH = 3.15 V min at VCC = 4.5 V); lower ICC but incompatible with 3.3 V TTL outputs. | Suitable for pure 5 V systems with CMOS logic; not recommended for mixed 3.3 V/5 V interconnects. | Select when interfacing exclusively with 5 V CMOS devices and lowest static power is prioritized. |
| SN74LV165AQPWRQ1 | Automotive-grade (AEC-Q100 Grade 1), wider VCC range (2.0–5.5 V), LV logic family with 3.3 V native compatibility. | Required for automotive infotainment or ADAS modules needing AEC-Q100 qualification and 3.3 V MCU integration. | Choose for automotive production programs where qualification and 3.3 V–5.5 V flexibility outweigh cost premium. |
Compared with 74HC165BQ,115, the 74HCT165BQ,115 offers guaranteed TTL-level input compatibility essential for legacy 5 V designs, while SN74LV165AQPWRQ1 adds automotive qualification and broader voltage support - making the HCT version optimal for cost-sensitive industrial control where 5 V dominance is assured.
Availability
74HCT165BQ,115 is available at Aetrix Electronics and suitable for industrial I/O expansion, automotive sensor aggregation, LED matrix control, and legacy bus level translation requiring stable component supply across extended temperature ranges.
Supply support for 74HCT165BQ,115 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 delivering high-performance, reliable components for automotive, industrial, mobile, and computing applications - with leadership in logic, power MOSFETs, and ESD protection.
The 74HCT165BQ,115 belongs to Nexperia's 74HCT logic family, engineered for seamless 5 V TTL system integration with low power consumption, high noise immunity, and extended temperature resilience - targeting cost-effective digital interface solutions in harsh environments.
FAQ
What is the maximum clock frequency supported by the 74HCT165BQ,115?
The 74HCT165BQ,115 supports a maximum clock frequency of 44 MHz at VCC = 4.5 V and ambient temperature of 25 °C, dropping to 21 MHz at -40 °C to +125 °C extremes. This is verified in Table 7 of the official Nexperia datasheet Rev. 8 (May 2025), with propagation delays measured under CL = 50 pF loading conditions.
Can the 74HCT165BQ,115 operate with a 3.3 V supply?
No - the 74HCT165BQ,115 is specified only for VCC = 4.5 V to 5.5 V per Table 5 of the datasheet. At 3.3 V, input thresholds fall outside TTL-compatibility range (VIH minimum becomes undefined), and output drive strength degrades significantly. Use 74LV165A or 74AHC165 for 3.3 V operation.
Is the exposed thermal pad on the DHVQFN16 package required to be soldered?
No - the exposed pad (terminal 1 index area) has no electrical function and requires no solder connection per SOT763-1 mechanical drawing. If soldered, it must remain electrically floating or be connected to GND; thermal performance improvement is marginal (<5 °C junction reduction) and not necessary for typical 5 V/25 mA operation.
How does the CE (clock enable) pin affect timing behavior?
When CE is HIGH, the CP input is disabled - no shifting occurs even on clock edges. When CE transitions LOW, the next CP rising edge initiates a shift cycle. Setup/hold times for CE relative to CP are defined in Table 7 (tsu = 20 ns, th = 0 ns at VCC = 4.5 V), ensuring glitch-free gating without metastability risk.
74HCT165BQ,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 16-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Shift Register
- Output Type:
- Complementary
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Function:
- Parallel or Serial to Serial
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DHVQFN (2.5x3.5)
74HCT165BQ,115 FAQ
1.How can I place an order for 74HCT165BQ,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT165BQ,115 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 74HCT165BQ,115 reliable?
The price and inventory of 74HCT165BQ,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT165BQ,115 is usually 5 days.
3.What payment methods are accepted for 74HCT165BQ,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT165BQ,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT165BQ,115?
74HCT165BQ,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT165BQ,115 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 74HCT165BQ,115?
For technical support, including 74HCT165BQ,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT165BQ,115 requirements.
6.How does Aetrix verify that 74HCT165BQ,115 is sourced from the original manufacturer or authorized distributors?
All 74HCT165BQ,115 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 74HCT165BQ,115 meets industry standards.
7.What is the process for return or replacement of 74HCT165BQ,115?
All 74HCT165BQ,115 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT165BQ,115, 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 74HCT165BQ,115 part is unused and in its original packaging.
Return procedure for 74HCT165BQ,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HCT165BQ,115 Tags
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SN74HC164DR
Texas Instruments
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Texas Instruments
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Nexperia USA Inc.
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SN74HC595PWR
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74HC165D,653
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SN74LV165APWR
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74HC595BQ,115
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74HC165BQ,115
Nexperia USA Inc.
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CD4094BPWR
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