Overview
The SN74HC164DT is an 8-bit parallel-out serial shift register manufactured by Texas Instruments. This integrated circuit is part of the HC logic family, known for its wide operating voltage range and low power consumption. The device is designed to shift data serially and output it in parallel, making it useful in various digital circuit applications.
Key Specifications
| Parameter | Test Conditions | Unit | Min | Typ | Max |
|---|---|---|---|---|---|
| VCC | Operating Voltage | V | 2 | - | 6 |
| VOH | High-Level Output Voltage | V | 3.84 (IOH = -5.2 mA) | - | 5.34 (IOH = -5.2 mA) |
| VOL | Low-Level Output Voltage | V | 0.1 (IOL = 20 μA) | - | 0.33 (IOL = 5.2 mA) |
| ICC | Quiescent Current | μA | - | - | 80 |
| fCLK | Clock Frequency | MHz | 25 (VCC = 4.5 V) | - | 36 (VCC = 6 V) |
| tsu | Setup Time Before CLK↑ | ns | 125 | - | - |
| th | Hold Time, Data After CLK↑ | ns | 5 | - | - |
Key Features
- Wide Operating Voltage Range: The SN74HC164DT operates over a voltage range of 2 V to 6 V, making it versatile for various applications.
- Low Power Consumption: The device has a maximum quiescent current of 80 μA, which is beneficial for power-sensitive designs.
- High Output Drive Capability: The outputs can drive up to 10 LSTTL loads, ensuring robust signal integrity.
- Positive-Edge Triggered Clock: The clock input (CLK) is triggered on the rising edge, allowing for synchronized data shifting.
- Asynchronous Clear: The device includes an asynchronous clear (CLR) input that resets all registers to zero immediately when a low signal is applied).
Applications
The SN74HC164DT is suitable for a variety of digital circuit applications, including:
- Serial-to-Parallel Data Conversion: It can convert serial data streams into parallel data, which is useful in data processing and communication systems.
- Shift Registers in Digital Circuits: It can be used in digital counters, timers, and other sequential logic circuits.
- Display Drivers and LED Drivers: The ability to drive multiple loads makes it suitable for driving display segments or LEDs.
- General Digital Logic Circuits: It can be used in any application requiring serial data shifting and parallel output.
Q & A
- What is the operating voltage range of the SN74HC164DT?
The operating voltage range is from 2 V to 6 V.
- What is the maximum clock frequency for the SN74HC164DT?
The maximum clock frequency is 36 MHz at VCC = 6 V).
- How many LSTTL loads can the outputs of the SN74HC164DT drive?
The outputs can drive up to 10 LSTTL loads).
- What is the quiescent current of the SN74HC164DT?
The maximum quiescent current is 80 μA).
- How is the clock input triggered?
The clock input (CLK) is triggered on the rising edge).
- What is the effect of applying a low signal to the CLR pin?
Applying a low signal to the CLR pin resets all registers to zero immediately).
- What is the setup time before the clock rising edge?
The setup time before the clock rising edge is 125 ns).
- What is the hold time after the clock rising edge?
The hold time after the clock rising edge is 5 ns).
- Is the SN74HC164DT still in production?
No, the SN74HC164DT is no longer manufactured but may still be available from inventory or secondary sources).
- Where can I find more detailed specifications and support for the SN74HC164DT?
More detailed specifications and support can be found on the Texas Instruments website and through their technical support forums).
