Overview
The SN74LS164NSR is an 8-bit parallel-out serial shift register produced by Texas Instruments. This component is part of the SN74LS164 series and is characterized by its gated serial inputs and asynchronous clear functionality. It is designed to provide complete control over incoming data, making it versatile for various digital circuit applications. The device operates within a temperature range of 0°C to 70°C, making it suitable for a wide range of industrial and commercial environments.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | NS (SOP - Small Outline Package) |
| Pins | 14 |
| Operating Temperature Range (°C) | 0 to 70 |
| Package Quantity | Carrier 2,000 (T&R) |
Key Features
- Gated Serial Inputs: The gated serial inputs (A and B) allow complete control over incoming data. A low at either input inhibits entry of new data and resets the first flip-flop to the low level at the next clock pulse.
- Fully Buffered Clock and Serial Inputs: Ensures stable and reliable clocking and data input operations.
- Asynchronous Clear: Allows for immediate reset of the shift register regardless of the clock state.
- Diode-Clamped Inputs: Minimizes transmission-line effects, enhancing signal integrity.
Applications
The SN74LS164NSR is suitable for a variety of digital circuit applications, including:
- Serial-to-parallel data conversion
- Shift register circuits in digital systems
- Buffering and storage in digital logic circuits
- Control and sequencing in digital control systems
Q & A
- What is the primary function of the SN74LS164NSR?
The primary function is to act as an 8-bit parallel-out serial shift register, allowing serial data input and parallel data output.
- What is the operating temperature range of the SN74LS164NSR?
The operating temperature range is from 0°C to 70°C.
- What type of package does the SN74LS164NSR come in?
The SN74LS164NSR comes in an NS (SOP - Small Outline Package) with 14 pins.
- What is the purpose of the gated serial inputs?
The gated serial inputs (A and B) provide complete control over incoming data, allowing for selective entry of new data based on the input states.
- How does the asynchronous clear function work?
The asynchronous clear allows for immediate reset of the shift register to a low state, regardless of the clock input.
- What is the significance of diode-clamped inputs?
Diode-clamped inputs minimize transmission-line effects, ensuring better signal integrity and reliability.
- Can the SN74LS164NSR be used in military applications?
No, the SN74LS164NSR is not characterized for the full military temperature range. Instead, it is suitable for commercial and industrial applications within the 0°C to 70°C range.
- How does clocking occur in the SN74LS164NSR?
Clocking occurs on the low-to-high-level transition of the clock input.
- Can data at the serial inputs be changed while the clock is high or low?
Yes, data at the serial inputs can be changed while the clock is high or low, but only information meeting the setup-time requirements will be entered.
- What are some common applications of the SN74LS164NSR?
Common applications include serial-to-parallel data conversion, shift register circuits, buffering and storage in digital logic circuits, and control and sequencing in digital control systems.
