Overview
The SN74HCS165 is a versatile 8-bit parallel- or serial-in, serial-out shift register produced by Texas Instruments. This device is designed to operate within a wide voltage range of 2 V to 6 V, making it suitable for various applications. It features Schmitt-trigger inputs, which allow for the handling of slow or noisy input signals and provide noise rejection capabilities. The SN74HCS165 is available in several package options, including TSSOP, SOIC, WQFN, and SOT-23-THN, catering to different design requirements.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 2 | 5 | 6 | V |
| Input Voltage (VI) | 0 | - | VCC | V |
| Output Voltage (VO) | 0 | - | VCC | V |
| Ambient Temperature (TA) | -40 | - | 125 | °C |
| Maximum Switching Frequency (fmax) at 6 V | 150 | - | 170 | MHz |
| Propagation Delay (tpd) at 6 V | 14 | - | 16 | ns |
| Output Drive Current at 6 V | - | - | ±7.8 | mA |
| Power Dissipation Capacitance per Gate (Cpd) | - | 20 | - | pF |
Key Features
- Wide operating voltage range: 2 V to 6 V
- Schmitt-trigger inputs for handling slow or noisy input signals and noise rejection
- Low power consumption: Typical ICC of 100 nA and typical input leakage current of ±100 nA
- High output drive capability: ±7.8-mA output drive at 6 V
- Extended ambient temperature range: –40°C to +125°C
- Parallel- or serial-in, serial-out 8-bit shift register functionality
- Two modes of operation: load data and shift data
- Clock inhibit (CLK INH) input to prevent clock pulses
Applications
The SN74HCS165 is particularly useful in applications where there is a need to increase the number of inputs on a microcontroller. It can be used in various digital systems where data needs to be shifted or loaded in parallel or serial fashion. Other applications include data processing, communication systems, and any scenario requiring the efficient handling of digital data streams.
Q & A
- What is the operating voltage range of the SN74HCS165?
The SN74HCS165 operates within a voltage range of 2 V to 6 V.
- What type of inputs does the SN74HCS165 have?
The SN74HCS165 features Schmitt-trigger inputs, which are beneficial for handling slow or noisy input signals and providing noise rejection.
- What are the typical power consumption characteristics of the SN74HCS165?
The typical supply current (ICC) is 100 nA, and the typical input leakage current is ±100 nA.
- What is the maximum output drive current of the SN74HCS165 at 6 V?
The maximum output drive current is ±7.8 mA at 6 V.
- What are the operating temperature limits of the SN74HCS165?
The device operates within an ambient temperature range of –40°C to +125°C.
- What are the two main modes of operation for the SN74HCS165?
The two modes are load data and shift data, controlled by the shift or load (SH/LD) input.
- How does the clock inhibit (CLK INH) input function?
The clock inhibit input can be held high to prevent clock pulses from being applied to the device.
- What is the maximum switching frequency of the SN74HCS165 at 6 V?
The maximum switching frequency is up to 170 MHz at 6 V.
- What is the propagation delay of the SN74HCS165 at 6 V?
The propagation delay is between 14 ns and 16 ns at 6 V.
- How should unused inputs be handled on the SN74HCS165?
Unused inputs should be terminated to either VCC or ground, using pull-up or pull-down resistors if necessary.
