Overview
The SN74LS165ADR is an 8-bit parallel-load serial-out shift register produced by Texas Instruments. This component is part of the 74LS series, known for its low power consumption and high speed. The device allows for parallel loading of data into its eight stages and serial shifting of the data in one direction, from QA to QH. It features gated clock inputs and direct overriding load (data) inputs, making it versatile for various digital circuit applications.
Key Specifications
| Parameter | Minimum | Typical | Maximum |
|---|---|---|---|
| Supply Voltage (VCC) | 4.5 V | 5 V | 5.5 V |
| High-Level Input Voltage (VIH) | 2 V | 2 V | 2 V |
| Low-Level Input Voltage (VIL) | 0.7 V | 0.8 V | 0.8 V |
| High-Level Output Voltage (VOH) | 2.5 V | 3.5 V | 3.5 V |
| Low-Level Output Voltage (VOL) | 0.25 V | 0.4 V | 0.5 V |
| Clock Frequency | 0 MHz | 25 MHz | 25 MHz |
| Operating Free-Air Temperature | 0°C | - | 70°C |
| Package Type | SOIC-16 | - | - |
Key Features
- Parallel-to-Serial Data Conversion: Allows for parallel loading of data into its eight stages and serial shifting of the data.
- Gated Clock Inputs: Clocking is accomplished through a two-input positive-NOR gate, enabling clock-inhibit functions.
- Direct Overriding Load (Data) Inputs: Data at the parallel inputs are loaded directly into the register while the shift/load input is low.
- Complementary Outputs: Features complementary outputs from the eighth bit.
- Low Power Consumption: Part of the 74LS series, known for low power consumption.
- High Speed Operation: Supports clock frequencies up to 25 MHz.
Applications
- Digital Circuit Design: Suitable for various digital circuit applications requiring data shifting and storage.
- Serial Communication Systems: Used in serial communication systems where data needs to be converted from parallel to serial format.
- Microcontroller and Microprocessor Systems: Can be integrated into microcontroller and microprocessor systems for data processing and storage.
- Automated Control Systems: Used in automated control systems where sequential data processing is required.
Q & A
- What is the SN74LS165ADR used for?
The SN74LS165ADR is used as an 8-bit parallel-load serial-out shift register, converting parallel data into serial data.
- What is the maximum clock frequency of the SN74LS165ADR?
The maximum clock frequency is 25 MHz.
- What is the operating voltage range of the SN74LS165ADR?
The operating voltage range is from 4.5 V to 5.5 V.
- What type of package does the SN74LS165ADR come in?
The SN74LS165ADR comes in a SOIC-16 package.
- Can the SN74LS165ADR be used in high-temperature environments?
No, the operating free-air temperature range is from 0°C to 70°C.
- How does the gated clock input function work?
The gated clock input is accomplished through a two-input positive-NOR gate, allowing one input to be used as a clock-inhibit function.
- What is the purpose of the direct overriding load (data) inputs?
The direct overriding load inputs allow data to be loaded directly into the register while the shift/load input is low.
- Does the SN74LS165ADR have complementary outputs?
- Is the SN74LS165ADR suitable for low power applications?
- Can the SN74LS165ADR be used in serial communication systems?
