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Nexperia USA Inc. 74HC166PW,118
- Part No.:
- 74HC166PW,118
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Shift Registers
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74HC166PW,118.pdf
- Description:
- IC 8BIT SHIFT REGISTER 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:213
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Product details
Overview
74HC166PW,118 from Nexperia is an 8-bit parallel-in/serial-out shift register with synchronous parallel load and serial shift capability. It operates across 2.0 V to 6.0 V supply, features active-low parallel enable (PE), clock enable (CE), and master reset (MR), and delivers 14 ns propagation delay at 6.0 V - used in microcontroller GPIO expansion, LED matrix drivers, and industrial control I/O staging.
For engineers reviewing the 74HC166PW,118 datasheet, 74HC166PW,118 pinout, 74HC166PW,118 application, or 74HC166PW,118 equivalent, key selection factors include its CMOS-level input compatibility, -40 °C to +125 °C temperature range, TSSOP16 package footprint, and precise setup/hold timing for reliable synchronization with MCU clocks.
Technical Context
The device implements an 8-stage edge-triggered shift register with dual-path data loading: parallel data (D0–D7) loads synchronously on CP rising edge when PE is LOW; serial data (DS) shifts in on each CP rising edge when PE is HIGH. CE must be LOW to enable clocking - a HIGH on CE blocks CP transitions from affecting register state.
It includes asynchronous active-low master reset (MR) that clears all flip-flops regardless of clock or enable states, and internal clamp diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors. Input thresholds are CMOS-compatible (VIH = 0.7×VCC, VIL = 0.3×VCC), ensuring robust noise immunity up to 1.5 V at VCC = 5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | 8-bit parallel-in/serial-out shift register with synchronous load and serial shift modes |
| Supply Voltage Range | 2.0 V to 6.0 V - supports mixed-voltage system interfacing and battery-powered operation |
| Propagation Delay (CP to Q7) | 14 ns (typ) at VCC = 6.0 V - enables >24 MHz operation in high-speed digital control loops |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood automotive modules and industrial PLCs |
| Input Compatibility | CMOS-level inputs (74HC variant) - compatible with 3.3 V and 5 V logic families without level shifters |
| Power Dissipation | 8.0 μA ICC (typ) at VCC = 6.0 V - suitable for low-power embedded systems with strict quiescent current budgets |
| ESD Protection | HBM >2000 V, CDM >1000 V - reduces need for external protection in board-level ESD-prone environments |
Pinout & Package
TSSOP16 plastic thin shrink small outline package (SOT403-1); 16-pin, 4.4 mm body width, 0.65 mm lead pitch; RoHS-compliant, surface-mountable with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DS) | Serial data input | Accepts serial bit stream during shift mode; sampled on CP rising edge when PE = HIGH |
| 2 (VCC) | Positive supply voltage | Primary power rail; decoupling capacitor required within 10 mm for stable high-speed operation |
| 3–5, 10–12, 14 (D0–D7) | Parallel data inputs | 8-bit parallel word loaded simultaneously into register on CP rising edge when PE = LOW |
| 6 (CE) | Clock enable (active LOW) | Disables CP input when HIGH - prevents unintended shifting during bus arbitration or debug pauses |
| 7 (CP) | Clock input (rising-edge triggered) | Synchronizes all register operations; requires clean edge with <20 ns rise time at VCC = 6.0 V |
| 8 (GND) | Ground reference | Return path for all signals and supply; must connect to low-impedance PCB ground plane |
| 9 (MR) | Master reset (active LOW) | Asynchronously clears all 8 stages to '0'; overrides clock and enable states |
| 13 (Q7) | Serial output | MSB output of shift register; drives next stage or microcontroller input with 4.5 V VOH at 4 mA load |
| 15 (PE) | Parallel enable (active LOW) | Selects parallel load mode (PE = LOW) vs. serial shift mode (PE = HIGH) |
| 16 (VCC) | Positive supply voltage | Duplicate VCC pin for improved power distribution and reduced package inductance |
Key Features
| Feature | Design Value |
|---|---|
| Wide supply range (2.0–6.0 V) | Enables direct interface with 3.3 V MCUs and legacy 5 V peripherals without voltage translation |
| Synchronous parallel load + serial shift | Allows flexible data ingestion: burst-load sensor arrays then shift out via single wire to conserve GPIO |
| Asynchronous master reset (MR) | Guarantees known initial state at power-up or fault recovery - critical for safety-critical I/O staging |
| Clamp diodes on all inputs | Permits safe connection to 12 V control signals using series current-limiting resistors (e.g., 10 kΩ) |
| High noise immunity (1.5 V @ 5 V) | Rejects EMI in motor drive or relay-switching environments without additional filtering components |
Applications
| LED Matrix Controller | Microcontroller GPIO Expander |
|---|---|
Use Scenario: Driving 64-LED grid using only three MCU pins (clock, data, latch). IC Role / Device Role / Timing Role: Serial-to-parallel converter that buffers column data and shifts rows under MCU command. Use Value: Reduces MCU pin count by 8× while maintaining full brightness control via PWM-compatible serial timing. | Use Scenario: Adding 8 digital inputs/outputs to an STM32F4 with exhausted GPIO banks. IC Role / Device Role / Timing Role: Synchronous I/O buffer synchronized to MCU SPI clock for deterministic read/write latency. Use Value: Enables real-time status monitoring of sensors and actuator control without software bit-banging overhead. |
| Industrial I/O Module | Legacy Bus Interface Adapter |
Use Scenario: Isolating and conditioning 8-channel 24 V DC sensor inputs in a DIN-rail PLC module. IC Role / Device Role / Timing Role: Level-translated input serializer feeding isolated digital isolators and MCU UART. Use Value: Eliminates discrete resistor networks and Schmitt triggers per channel - cuts BOM cost by 35%. | Use Scenario: Bridging parallel-addressed EEPROM (e.g., AT28C64B) to modern SPI-only SoC. IC Role / Device Role / Timing Role: Address latching and byte serialization unit controlled by FPGA logic. Use Value: Maintains backward compatibility with legacy memory maps while using modern low-pin-count interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit parallel-in/serial-out shift register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT166PW,118 | TTL-compatible inputs (VIH = 2.0 V min); identical pinout and function | Better suited for mixed 5 V TTL/CMOS systems where input thresholds must match legacy logic | Select when interfacing directly to 74LS or older microcontrollers with weak pull-ups |
| SN74LV165APWR | 3.3 V only (1.65–3.6 V), 8-bit parallel-in/serial-out with complementary outputs | Requires level-shifting for 5 V systems; offers Q and Q̅ outputs for differential signaling | Prefer for new 3.3 V designs needing lower dynamic power and tighter timing specs |
Compared with 74HCT166PW,118, the 74HC166PW,118 provides higher noise margins in 5 V systems but lacks TTL input compatibility; versus SN74LV165APWR, it supports wider voltage operation and legacy 5 V integration but consumes more dynamic power above 3.6 V.
Availability
74HC166PW,118 is available at Aetrix Electronics and suitable for industrial control panels, LED display subsystems, and embedded I/O expansion requiring stable component supply across extended temperature ranges.
Supply support for 74HC166PW,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 delivering high-performance, reliable logic, analog, and MOSFET solutions with focus on efficiency, reliability, and sustainability.
The 74HC166 belongs to Nexperia's HC logic family - engineered for low-power, high-noise-immunity digital interfacing in industrial, automotive, and consumer applications demanding wide supply range and extended temperature operation.
FAQ
What is the maximum clock frequency supported by the 74HC166PW,118?
The 74HC166PW,118 supports up to 68 MHz maximum clock frequency at VCC = 6.0 V and 25 °C, with guaranteed operation to 24 MHz across the full -40 °C to +125 °C range. This is derived from tW (minimum pulse width) of 17 ns and fmax specifications in Table 7 of the datasheet - not derated for temperature or supply variation.
Can the 74HC166PW,118 operate with a 3.3 V supply?
Yes - the 74HC166PW,118 is fully specified from 2.0 V to 6.0 V, including 3.3 V operation. At VCC = 3.3 V, VIH is 2.31 V (min), VIL is 0.99 V (max), and propagation delay is 22 ns (max) over temperature, making it compatible with standard 3.3 V CMOS logic families.
Is the MR (master reset) pin synchronous or asynchronous?
The MR pin is asynchronous and active LOW. It forces all eight register stages to logic '0' immediately upon assertion, independent of CP, CE, or PE states. The reset releases synchronously with the next valid CP edge only if MR is released while CE = LOW and CP is active - otherwise, output remains stable until next clock.
Does the 74HC166PW,118 support hot insertion or live swapping?
No - the 74HC166PW,118 does not support hot insertion. Its absolute maximum ratings specify VCC must be powered before applying input signals, and MR must be held HIGH during power-up to prevent metastability. Clamp diodes do not guarantee safe hot-swap behavior without external current limiting and sequencing control.
74HC166PW,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HC
- Package/Case:
- 16-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:
- Parallel or Serial to Serial
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
74HC166PW,118 FAQ
1.How can I place an order for 74HC166PW,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC166PW,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 74HC166PW,118 reliable?
The price and inventory of 74HC166PW,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC166PW,118 is usually 5 days.
3.What payment methods are accepted for 74HC166PW,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC166PW,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC166PW,118?
74HC166PW,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC166PW,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 74HC166PW,118?
For technical support, including 74HC166PW,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC166PW,118 requirements.
6.How does Aetrix verify that 74HC166PW,118 is sourced from the original manufacturer or authorized distributors?
All 74HC166PW,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 74HC166PW,118 meets industry standards.
7.What is the process for return or replacement of 74HC166PW,118?
All 74HC166PW,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC166PW,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 74HC166PW,118 part is unused and in its original packaging.
Return procedure for 74HC166PW,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HC166PW,118 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
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