Overview
The SN74HC165DRG4 is an 8-bit parallel-load shift register produced by Texas Instruments. This device is part of the HC165 series, which is designed for high-speed digital logic applications. It features a wide operating voltage range of 2 V to 6 V, making it versatile for various system designs. The SN74HC165DRG4 allows for parallel loading of data through eight individual direct data inputs (A-H) and shifts the data serially through a single output (QH) when clocked. This component is particularly useful in applications requiring the conversion of parallel data to serial data streams.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| VCC Supply Voltage | 2 | 5 | 6 | V |
| VIH High-Level Input Voltage (VCC = 6 V) | 4.2 | V | ||
| VIL Low-Level Input Voltage (VCC = 6 V) | 1.8 | V | ||
| ICC Power Consumption (Max) | 80 | µA | ||
| tpd Propagation Delay (CLK to QH/QH') | 13 | 38 | ns | |
| fmax Clock Frequency (VCC = 6 V) | 25 | 29 | MHz | |
| Output Drive (VCC = 5 V) | ±4 | mA | ||
| Input Current (Max) | 1 | µA |
Key Features
- Wide operating voltage range: 2 V to 6 V
- Outputs can drive up to 10 LSTTL loads
- Low power consumption: 80-µA maximum ICC
- Typical propagation delay: 13 ns
- ±4-mA output drive at 5 V
- Low input current: 1-µA maximum
- Complementary serial (QH) output
- Direct overriding load (data) inputs
- Gated clock inputs
- Parallel-to-serial data conversion
Applications
The SN74HC165DRG4 is suitable for a variety of digital logic applications, including:
- Parallel-to-serial data conversion in microprocessor systems
- Interface expansion for digital inputs in embedded systems
- Cascading multiple shift registers to increase the number of digital inputs
- High-speed digital logic circuits requiring low power consumption
Q & A
- What is the operating voltage range of the SN74HC165DRG4?
The operating voltage range is 2 V to 6 V. - How many bits can be loaded in parallel?
The device can load 8 bits in parallel. - What is the typical propagation delay of the SN74HC165DRG4?
The typical propagation delay is 13 ns. - Can the SN74HC165DRG4 drive multiple LSTTL loads?
Yes, it can drive up to 10 LSTTL loads. - What is the maximum power consumption of the SN74HC165DRG4?
The maximum power consumption is 80 µA. - How does the clock-inhibit function work?
The clock-inhibit (CLK INH) function inhibits the clock, preventing any change in the output when it is high. - Can multiple SN74HC165DRG4 devices be cascaded?
Yes, multiple devices can be cascaded to increase the number of digital inputs. - What is the purpose of the SH/LD input?
The SH/LD input enables parallel loading of data when low and inhibits clock inputs. - What is the output drive capability at 5 V?
The output drive capability is ±4 mA at 5 V. - Is the SN74HC165DRG4 RoHS compliant?
Yes, the SN74HC165DRG4 is RoHS compliant.
