My Inquiry
My Account
Nexperia USA Inc. 74HCT165D,653
- Part No.:
- 74HCT165D,653
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Shift Registers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74HCT165D,653.pdf
- Description:
- IC SHIFT REG 8BIT PI-SO 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:31,515
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74HCT165D,653 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), and dual complementary outputs (Q7/Q7). It operates from 4.5 V to 5.5 V, supports -40 °C to +125 °C, and enables high-noise-immunity data conversion in microcontroller GPIO expansion systems.
For engineers reviewing the 74HCT165D,653 datasheet, 74HCT165D,653 pinout, 74HCT165D,653 application, or 74HCT165D,653 equivalent, this device serves as a cost-effective, temperature-robust interface for parallel-to-serial data acquisition in industrial control panels, automotive body controllers, and embedded sensor hubs where level-shifted input tolerance and deterministic timing are required.
Technical Context
The 74HCT165D,653 implements a synchronous 8-stage shift register with edge-triggered clock (CP) and active-low clock enable (CE) that gates CP transitions. Its asynchronous PL input loads D0–D7 directly into all stages regardless of clock state, enabling immediate parallel capture before serial readout.
It features dual output topology: Q7 provides the MSB of the shifted-out data stream, while Q7 delivers its logical complement-supporting differential signaling or direct connection to Schmitt-trigger inputs without external inverters. Input overvoltage tolerance up to 15 V allows safe interfacing with higher-voltage logic domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | 8-bit parallel-in/serial-out shift register with asynchronous load and complementary outputs |
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL systems and stable operation across industrial voltage tolerances |
| Input Logic Level | TTL-compatible - accepts 2.0 V min HIGH and 0.8 V max LOW at VCC = 5 V, eliminating need for level translators when driven by legacy MCU ports |
| Max Clock Frequency | 44 MHz at VCC = 4.5 V - supports high-speed serial readout (e.g., 8-bit data in ≤182 ns) for real-time I/O monitoring |
| Propagation Delay | 17 ns (typ) from CP to Q7 at VCC = 4.5 V - guarantees predictable timing margins in synchronous control loops |
| Operating Temperature | -40 °C to +125 °C - validated for under-hood automotive ECUs and industrial motor drives without derating |
| ESD Protection | HBM >2000 V, CDM >1000 V - withstands handling and board-level transients in automated assembly and field service environments |
Pinout & Package
74HCT165D,653 uses the SO16 (SOT109-1) package: plastic small outline, 16-pin, 3.9 mm body width, gull-wing leads, JEDEC MS-012 compliant.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (PL) | Asynchronous parallel load input | Active-LOW signal that captures D0–D7 simultaneously into register stages, independent of clock - essential for snapshot sampling of bus states |
| 2 (CP) | Clock input | LOW-to-HIGH edge-triggered; advances shift register only when CE = LOW - enables precise synchronization with system timing domains |
| 7 (Q7) | Serial output (MSB) | Provides uncomplemented output of final stage; used directly for SPI-like daisy-chaining or microcontroller input capture |
| 9 (Q7) | Complementary serial output | Delivers inverted Q7 signal - eliminates external inverter for differential receivers or noise-immune transmission over PCB traces |
| 10 (DS) | Serial data input | Feeds new bit into LSB position during shift mode; tied HIGH/LOW or driven by upstream device for cascaded configurations |
| 11–14, 3–6 (D0–D7) | Parallel data inputs | Eight independent inputs accepting parallel byte; mapped to physical pins with non-sequential numbering (D0 = pin 6, D1 = pin 5, ..., D7 = pin 13) per SO16 layout |
| 15 (CE) | Clock enable input | Active-LOW gate for CP - holds register state when HIGH, allowing clock gating without metastability risk |
| 16 (VCC) | Positive supply | Primary power rail; decoupling capacitor placement near this pin is critical for maintaining 44 MHz timing integrity |
| 8 (GND) | Ground reference | Common return path for all internal logic and I/O; must be low-impedance to minimize ground bounce during parallel load transitions |
Key Features
| Feature | Design Value |
|---|---|
| Asynchronous parallel load | Enables immediate capture of 8-bit status signals (e.g., switch matrix, sensor flags) without waiting for clock edges - critical for fault detection latency |
| TTL-compatible inputs | Accepts standard 5 V logic thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), ensuring interoperability with legacy MCUs, FPGAs, and discrete logic without level-shifting circuitry |
| Overvoltage-tolerant inputs | Withstands up to 15 V on any input pin - protects against accidental 12 V miswiring in industrial control cabinets and simplifies mixed-voltage board design |
| Dual complementary outputs | Q7 and Q7 provide matched rise/fall times and guaranteed inversion - supports robust RS-422-style signaling or direct connection to clocked latches |
| Wide temperature range | Specified from -40 °C to +125 °C - qualified for engine compartment, power converter, and outdoor infrastructure applications without thermal derating |
Applications
| Industrial PLC I/O Expansion | Automotive Body Control Module |
|---|---|
|
Use Scenario: Expanding limited GPIO count on a Cortex-M4-based PLC controller to monitor 32 pushbutton inputs across four 74HCT165D,653 devices daisy-chained via Q7→DS. IC Role / Device Role / Timing Role: Acts as parallel-to-serial converter, capturing debounced button states synchronously on rising CP edges gated by CE, with PL used for periodic re-synchronization. Use Value: Reduces MCU pin count by 8× per device while maintaining sub-200 ns propagation delay - enabling real-time response to emergency stop events within 1 ms system latency budget. |
Use Scenario: Reading door lock status, window position sensors, and mirror switch positions in a centralized BCM using shared SPI bus with hardware CS decoding. IC Role / Device Role / Timing Role: Provides isolated, noise-immune parallel input aggregation; Q7/Q7 outputs drive differential receivers to reject EMI in vehicle harnesses. Use Value: Overvoltage-tolerant inputs survive battery transients up to 15 V; -40 °C to +125 °C rating ensures reliability in under-dash mounting locations near HVAC ducts. |
| Embedded Sensor Hub Interface | Legacy Equipment Retrofit Kit |
|
Use Scenario: Aggregating analog-to-digital converter outputs (8-bit parallel) from six environmental sensors (temp, humidity, CO₂) into a single serial stream for ESP32 host MCU. IC Role / Device Role / Timing Role: Functions as synchronous shift register with PL used to latch sampled ADC values before serial readout; CE enables burst-mode transfer during low-power intervals. Use Value: 44 MHz max clock supports full 8-bit readout in <182 ns - minimizing sensor sampling overhead and extending battery life in wireless nodes. |
Use Scenario: Replacing obsolete 74LS165 in aging test equipment control panel to restore functionality while maintaining identical PCB footprint and wiring. IC Role / Device Role / Timing Role: Drop-in replacement with identical pinout (SO16), TTL-compatible inputs, and improved noise immunity - no schematic or firmware changes required. Use Value: Eliminates obsolescence risk while improving ESD robustness (HBM >2000 V) and reducing supply current (ICC < 160 μA at 125 °C) versus original LS family. |
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 |
|---|---|---|---|
| 74HC165D,653 | CMOS-input version; VIH/VIL referenced to VCC - requires 3.5 V min HIGH at VCC = 5 V, less tolerant of marginal drive strength | Suitable for pure CMOS systems (e.g., 3.3 V FPGA I/O banks with level-shifting), but not direct drop-in for TTL sources | Select when interfacing with modern low-voltage logic and power efficiency is prioritized over legacy compatibility |
| SN74LV165APWR | TI part with 2.0–5.5 V supply, LV-CMOS inputs, and 25 mA drive - higher output current than 74HCT165's ±4 mA, but lacks Q7 complement output | Requires external inverter for differential signaling; better suited for driving heavier capacitive loads (e.g., long PCB traces) | Choose when higher fan-out capability is needed and complementary output is unnecessary or can be added discretely |
Compared with 74HC165D,653, the 74HCT165D,653 offers guaranteed TTL-level input compatibility and built-in Q7 inversion - reducing BOM count and layout complexity in mixed-technology systems. Versus SN74LV165APWR, it trades off output drive strength for integrated differential signaling support and tighter timing consistency across temperature.
Availability
74HCT165D,653 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, embedded sensor hub interfaces, and legacy equipment retrofit requiring stable component supply across extended temperature ranges.
Supply support for 74HCT165D,653 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, discrete, and MOSFET solutions - serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.
The 74HCT165D,653 belongs to Nexperia's 74HCT logic family, engineered for seamless integration with legacy TTL systems while delivering CMOS power efficiency and enhanced ESD robustness for demanding embedded applications.
FAQ
Can 74HCT165D,653 operate at 3.3 V supply?
No - the 74HCT165D,653 is specified only for 4.5 V to 5.5 V operation per its recommended conditions. At 3.3 V, input thresholds fall outside TTL compatibility (VIH minimum becomes 2.0 V, but VCC = 3.3 V yields insufficient noise margin), and timing parameters are not guaranteed. Use 74LVC165A for 3.3 V systems.
What is the purpose of the Q7 and Q7 outputs?
Q7 delivers the uncomplemented MSB of the shift register, while Q7 provides its exact logical inverse. This dual-output architecture enables direct connection to differential receivers or Schmitt-trigger inputs without external inverters, improving noise immunity and reducing component count in EMI-prone environments like automotive harnesses.
How does the PL (parallel load) input interact with CE and CP?
PL operates asynchronously and overrides CE/CP behavior: when PL is LOW, D0–D7 are loaded immediately into all eight stages regardless of CE or CP state. When PL returns HIGH, the device resumes serial shifting on subsequent CP edges (if CE = LOW). This allows deterministic snapshot capture followed by controlled serial readout.
Is the SO16 package (SOT109-1) RoHS compliant and lead-free?
Yes - the 74HCT165D,653 in SO16 packaging meets RoHS Directive 2011/65/EU and is manufactured with lead-free terminations and halogen-free molding compound, verified per Nexperia's compliance documentation (Declaration of Conformity available upon request).
74HCT165D,653 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- 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-SO
74HCT165D,653 FAQ
1.How can I place an order for 74HCT165D,653 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT165D,653 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 74HCT165D,653 reliable?
The price and inventory of 74HCT165D,653 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT165D,653 is usually 5 days.
3.What payment methods are accepted for 74HCT165D,653?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT165D,653 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT165D,653?
74HCT165D,653 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT165D,653 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 74HCT165D,653?
For technical support, including 74HCT165D,653 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT165D,653 requirements.
6.How does Aetrix verify that 74HCT165D,653 is sourced from the original manufacturer or authorized distributors?
All 74HCT165D,653 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 74HCT165D,653 meets industry standards.
7.What is the process for return or replacement of 74HCT165D,653?
All 74HCT165D,653 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT165D,653, 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 74HCT165D,653 part is unused and in its original packaging.
Return procedure for 74HCT165D,653:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HCT165D,653 Tags
-
SN74HC164DR
Texas Instruments
-
SN74HC595DR
Texas Instruments
-
74HC595PW,118
Nexperia USA Inc.
-
SN74HC165PWR
Texas Instruments
-
HEF4094BT,653
Nexperia USA Inc.
-
74HC595D,118
Nexperia USA Inc.
-
SN74HC595PWR
Texas Instruments
-
74HC165D,653
Nexperia USA Inc.
-
SN74LV165APWR
Texas Instruments
-
74HC595BQ,115
Nexperia USA Inc.
-
74HC165BQ,115
Nexperia USA Inc.
-
CD4094BPWR
Texas Instruments
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
