Overview
The 74HC166DB,118, produced by Nexperia USA Inc., is an 8-bit serial or parallel-in/serial-out shift register. Although this specific part number is now obsolete and no longer manufactured, it was part of the 74HC166 and 74HCT166 series, which are widely used in digital circuitry for data manipulation and storage.
The device allows for both serial and parallel data input, making it versatile for various applications. It features a serial data input (DS), eight parallel data inputs (D0 to D7), and a serial output (Q7). The shift register can be controlled using a parallel enable input (PE) and a clock enable input (CE), allowing for flexible data loading and shifting operations.
Key Specifications
| Parameter | Value | Unit | Conditions |
|---|---|---|---|
| VCC | 2.0 - 6.0 | V | |
| Logic Switching Levels | CMOS | ||
| Output Drive Capability | ± 5.2 | mA | |
| Propagation Delay (tpd) | 15 - 45 | ns | VCC = 4.5 V, CL = 50 pF |
| Maximum Clock Frequency (fmax) | 63 | MHz | VCC = 4.5 V |
| Number of Bits | 8 | ||
| Operating Temperature Range | -40 °C to +125 °C | °C | |
| Package Type | SO16 (SOT109-1), TSSOP16 (SOT403-1) |
Key Features
- 8-bit Serial or Parallel-in/Serial-out Shift Register: Allows for both serial and parallel data input and serial output.
- Flexible Data Loading: Data can be loaded in parallel using the parallel enable input (PE) or serially through the serial data input (DS).
- Clock Enable Input (CE): Enables or disables the clock input (CP), allowing for control over data shifting.
- Wide Operating Voltage Range: Operates from 2.0 V to 6.0 V, making it suitable for various power supply conditions.
- High Speed Operation: Maximum clock frequency of up to 63 MHz at VCC = 4.5 V.
- Low Power Consumption: Designed for low power dissipation, making it energy-efficient.
Applications
- Digital Signal Processing: Used in applications requiring serial-to-parallel or parallel-to-serial data conversion.
- Data Storage and Manipulation: Suitable for shift register applications in digital circuits, such as counters, dividers, and data buffers.
- Communication Systems: Can be used in serial communication protocols for data transmission and reception.
- Embedded Systems: Useful in microcontroller and microprocessor-based systems for data handling and storage.
Q & A
- What is the 74HC166DB,118?
The 74HC166DB,118 is an 8-bit serial or parallel-in/serial-out shift register produced by Nexperia USA Inc., although it is now obsolete.
- What are the key inputs and outputs of the 74HC166?
The device features a serial data input (DS), eight parallel data inputs (D0 to D7), a serial output (Q7), a parallel enable input (PE), a clock input (CP), and a clock enable input (CE).
- How does the parallel enable input (PE) function?
When PE is LOW, the data from D0 to D7 is loaded into the shift register on the next LOW-to-HIGH transition of the clock input (CP). When PE is HIGH, data enters the register serially at DS.
- What is the role of the clock enable input (CE)?
A HIGH on CE disables the CP input, preventing data from being shifted. A LOW on CE enables the CP input, allowing data to be shifted on the LOW-to-HIGH transitions of CP.
- What is the operating voltage range of the 74HC166?
The device operates from 2.0 V to 6.0 V.
- What is the maximum clock frequency of the 74HC166?
The maximum clock frequency is up to 63 MHz at VCC = 4.5 V.
- What are the available package types for the 74HC166?
The device is available in SO16 (SOT109-1) and TSSOP16 (SOT403-1) packages.
- What is the operating temperature range of the 74HC166?
The device operates from -40 °C to +125 °C.
- Is the 74HC166DB,118 still available for purchase?
No, the 74HC166DB,118 is obsolete and no longer manufactured. However, similar substitutes like the 74HC166PW,118 are available.
- What are some common applications of the 74HC166?
Common applications include digital signal processing, data storage and manipulation, communication systems, and embedded systems.
