Overview
The 74HC595BZX, produced by Nexperia USA Inc., is an 8-bit serial-in, serial or parallel-out shift register with a storage register and 3-state outputs. This integrated circuit is part of the 74HC series, known for its high-speed CMOS logic. It is designed to operate over a wide voltage range, making it versatile for various applications. The device features separate clocks for the shift and storage registers, enabling flexible data transfer and output control.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VCC (Supply Voltage) | - | 2.0 | - | 6.0 | V |
| VIH (HIGH-level input voltage) | VCC = 2.0 V | 1.5 | - | 1.5 | V |
| VIH (HIGH-level input voltage) | VCC = 4.5 V | 3.15 | - | 3.15 | V |
| VIH (HIGH-level input voltage) | VCC = 6.0 V | 4.2 | - | 4.2 | V |
| VIL (LOW-level input voltage) | VCC = 2.0 V | - | 0.5 | 0.8 | V |
| VIL (LOW-level input voltage) | VCC = 4.5 V | - | 1.35 | 2.1 | V |
| VIL (LOW-level input voltage) | VCC = 6.0 V | - | 1.8 | 2.8 | V |
| ICC (Supply Current) | VCC = 6.0 V; IO = 0 A | - | - | 160 | μA |
| CI (Input Capacitance) | - | - | - | 3.5 | pF |
| tpd (Propagation Delay) | VCC = 2 V | 52 | - | 200 | ns |
| tpd (Propagation Delay) | VCC = 4.5 V | 19 | - | 48 | ns |
| tpd (Propagation Delay) | VCC = 6 V | 15 | - | 41 | ns |
Key Features
- 8-bit serial-in, serial or parallel-out shift register with a storage register and 3-state outputs.
- Separate clocks for the shift and storage registers, allowing for flexible data transfer and output control.
- Serial input (DS) and serial output (Q7S) for cascading multiple devices.
- Asynchronous reset (MR) input to reset the shift register.
- 3-state outputs to reduce bus contention when the device is not selected.
- Wide operating voltage range from 2.0 V to 6.0 V.
- Low power consumption with a supply current of up to 160 μA at 6.0 V.
- High-speed operation with propagation delays as low as 15 ns at 6.0 V.
Applications
- Display Drivers: For driving LED displays, LCD displays, and other types of display systems.
- Data Transmission: In serial communication systems where data needs to be shifted and stored.
- Microcontroller Interfaces: To expand the output capabilities of microcontrollers.
- Automotive Systems: For various control and display functions in automotive electronics.
- Industrial Control Systems: For controlling and monitoring industrial processes.
Q & A
- What is the primary function of the 74HC595BZX?
The primary function of the 74HC595BZX is to act as an 8-bit serial-in, serial or parallel-out shift register with a storage register and 3-state outputs.
- What is the operating voltage range of the 74HC595BZX?
The operating voltage range of the 74HC595BZX is from 2.0 V to 6.0 V.
- How does the device handle data transfer between the shift and storage registers?
Data is shifted on the LOW-to-HIGH transitions of the SHCP input, and the data in the shift register is transferred to the storage register on a LOW-to-HIGH transition of the STCP input.
- What is the purpose of the asynchronous reset (MR) input?
The asynchronous reset (MR) input is used to reset the shift register to its initial state.
- Can the 74HC595BZX be cascaded with other devices?
- What are the typical propagation delays for the 74HC595BZX?
The propagation delays range from 15 ns to 200 ns depending on the supply voltage.
- What is the maximum supply current of the 74HC595BZX?
The maximum supply current is 160 μA at 6.0 V.
- What are some common applications of the 74HC595BZX?
Common applications include display drivers, data transmission systems, microcontroller interfaces, automotive systems, and industrial control systems.
- What is the significance of the 3-state outputs in the 74HC595BZX?
The 3-state outputs help in reducing bus contention when the device is not selected.
- What is the input capacitance of the 74HC595BZX?
The input capacitance is approximately 3.5 pF.
