SN74HC164N Detailed explanation of pin function specifications and circuit principle instructions
The SN74HC164N is part of the Texas Instruments (TI) brand. It is a high-speed CMOS shift register that is commonly used in various digital applications.
Package Type:
The SN74HC164N comes in a DIP-16 (Dual Inline Package) form factor, which has 16 pins in total.
Pin Function Specifications:
Here is a detailed explanation of the pin functions for the SN74HC164N shift register in the DIP-16 package.
Pin Number Pin Name Function Description 1 Q1 Shift Register Output (First bit) - The first output from the shift register. 2 Q2 Shift Register Output (Second bit) - The second output from the shift register. 3 Q3 Shift Register Output (Third bit) - The third output from the shift register. 4 Q4 Shift Register Output (Fourth bit) - The fourth output from the shift register. 5 Q5 Shift Register Output (Fifth bit) - The fifth output from the shift register. 6 Q6 Shift Register Output (Sixth bit) - The sixth output from the shift register. 7 Q7 Shift Register Output (Seventh bit) - The seventh output from the shift register. 8 GND Ground Pin - This is the reference ground pin for the circuit. 9 DS (Data Input) Data Input - The input pin where the serial data is shifted in. 10 MR (Master Reset) Master Reset - A logic low on this pin resets the shift register. 11 SH/LD (Shift/Load) Shift/Load Control - A logic low on this pin shifts the register, while a logic high loads the data in parallel. 12 CLK ( Clock Input) Clock Input - The clock signal controls the shifting of data through the register. 13 QH (Serial Output) Serial Output - Provides the serial output for the shifted data. 14 QH' (Inverted Serial Output) Inverted Serial Output - Provides the inverted version of the serial output. 15 VCC (Supply Voltage) Supply Voltage - This is the positive supply voltage pin for the circuit. 16 Q8 Shift Register Output (Eighth bit) - The eighth output from the shift register.Circuit Principle Explanation:
The SN74HC164N is an 8-bit serial-in, parallel-out shift register. The main function of the IC is to convert serial data (input one bit at a time) into parallel data (output as multiple bits simultaneously).
Data Shifting: Data is shifted into the register on the rising edge of the clock pulse. Parallel Outputs: After the data is shifted, it is available on 8 output pins (Q1 to Q8). Shift/Load Control: The SH/LD pin determines whether the register operates in shift mode (shift in data) or load mode (load data parallelly). Master Reset: When the MR pin is driven low, all the outputs are reset to 0.FAQs About the SN74HC164N Shift Register:
Q: What is the supply voltage range for the SN74HC164N? A: The supply voltage range for the SN74HC164N is from 2V to 6V. Q: Can the SN74HC164N be used for serial-to-parallel conversion? A: Yes, the SN74HC164N is designed for serial-to-parallel conversion, where data is input serially and output in parallel. Q: How many output pins does the SN74HC164N have? A: The SN74HC164N has 8 output pins (Q1 to Q8). Q: What happens when the Master Reset (MR) pin is pulled low? A: When the MR pin is pulled low, all outputs (Q1 to Q8) are reset to logic low (0). Q: What is the function of the SH/LD pin? A: The SH/LD pin determines the mode of operation. When low, the shift register shifts the data; when high, it loads data in parallel from the inputs. Q: How is data shifted into the register? A: Data is shifted into the SN74HC164N on the rising edge of the clock signal applied to the CLK pin. Q: Can I use the SN74HC164N in applications where only 4-bit data needs to be shifted? A: Yes, the SN74HC164N can be used for applications that require 4-bit data, but it has 8 bits in total. Q: How many bits does the SN74HC164N register hold? A: The SN74HC164N holds 8 bits of data, which can be shifted in or out. Q: Is the SN74HC164N a CMOS device? A: Yes, the SN74HC164N is a CMOS (Complementary Metal-Oxide-Semiconductor) device.Q: What is the role of the QH pin in the SN74HC164N?
A: The QH pin provides the serial output of the shifted data.Q: Can the SN74HC164N be used for high-speed data processing?
A: Yes, the SN74HC164N can handle high-speed data shifting, with fast rise and fall times suitable for many applications.Q: Is the SN74HC164N compatible with TTL logic levels?
A: Yes, the SN74HC164N is compatible with TTL logic levels, typically operating with a VCC of 5V.Q: What is the maximum clock frequency supported by the SN74HC164N?
A: The maximum clock frequency supported by the SN74HC164N is typically around 30 MHz at 5V, depending on the load.Q: Can the SN74HC164N shift data both ways (left and right)?
A: No, the SN74HC164N only shifts data in one direction, which is from the DS pin to the Q8 pin.Q: How do I disable the clock signal for the SN74HC164N?
A: You can disable the clock signal by applying a low signal to the SH/LD pin, effectively halting the shifting process.Q: What is the difference between the QH and QH' pins?
A: QH provides the serial output of the shifted data, while QH' provides the inverted version of that output.Q: How do I load data in parallel to the SN74HC164N?
A: To load data in parallel, apply a high logic level to the SH/LD pin and then provide the parallel data to the Q1 to Q8 pins.Q: What is the significance of the VCC pin?
A: The VCC pin provides the positive supply voltage for the IC, typically connected to 5V.Q: How many inputs does the SN74HC164N have?
A: The SN74HC164N has one data input (DS) pin.Q: Can I use the SN74HC164N for shift register cascades?
A: Yes, the SN74HC164N can be cascaded with other shift registers for applications that require more than 8-bit shifting.This description covers the pinout and functionality of the SN74HC164N and answers the most common questions regarding its usage and application.
