Overview
The SN74HC165NSR is an 8-bit parallel-load shift register produced by Texas Instruments. This device is part of the SNx4HC165 family and is designed to load data in parallel and shift it out serially. It operates within a wide voltage range of 2 V to 6 V, making it versatile for various applications. The SN74HC165NSR features low power consumption, high output drive capability, and the ability to drive up to 10 LSTTL loads. It is available in several package types, including the SOP (Small Outline Package) with 16 pins.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC (Operating Voltage) | 2 | - | 6 | V |
| IOH (Output Current High) | -20 | - | -5.2 | mA |
| IOL (Output Current Low) | 20 | - | 5.2 | mA |
| ICC (Quiescent Current) | - | - | 80 | μA |
| tpd (Propagation Delay Time) | 13 | - | - | ns |
| fmax (Maximum Clock Frequency) | - | - | 31 (at 4.5V), 36 (at 6V) | MHz |
| Input Current | - | - | 1 | μA |
| Operating Temperature | -40 | - | 125 | °C |
Key Features
- Wide operating voltage range of 2 V to 6 V
- Outputs can drive up to 10 LSTTL loads
- Low power consumption, 80-μA maximum ICC
- Typical propagation delay time of 13 ns
- ±4-mA output drive at 5 V
- Low input current of 1-μA maximum
- Direct overriding load (data) inputs
- Gated clock inputs
- Parallel-to-serial data conversion
- Complementary serial (QH) output
Applications
- Programmable Logic Controllers
- Appliances
- Video Display Systems
- Output Expanders
- Keyboards
Q & A
- What is the operating voltage range of the SN74HC165NSR?
The operating voltage range is from 2 V to 6 V. - How many LSTTL loads can the outputs of the SN74HC165NSR drive?
The outputs can drive up to 10 LSTTL loads. - What is the maximum quiescent current of the SN74HC165NSR?
The maximum quiescent current is 80 μA. - What is the typical propagation delay time of the SN74HC165NSR?
The typical propagation delay time is 13 ns. - Can the SN74HC165NSR be used in high-temperature environments?
Yes, it can operate from -40°C to 125°C. - How does the clock-inhibit function work on the SN74HC165NSR?
The clock-inhibit (CLK INH) function inhibits the clock, resulting in no change of the output when CLK INH is high and CLK is low. - Can multiple SN74HC165NSR devices be cascaded?
Yes, multiple devices can be cascaded to allow more digital inputs to be interfaced with a single processor. - What is the purpose of the SH/LD input in the SN74HC165NSR?
The SH/LD input controls whether the device is in parallel load mode (SH/LD low) or shift mode (SH/LD high). - Does the SN74HC165NSR support bi-directional communication?
No, the SN74HC165NSR does not support bi-directional communication; data can only be read by the processor, not written back. - What are the package options available for the SN74HC165NSR?
The SN74HC165NSR is available in SOP (Small Outline Package) among other package types.
