Overview
The 74LVC595AD, 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 device is designed to operate in a mixed 3.3 V and 5 V environment, making it versatile for various electronic designs. It features separate clocks for both the shift and storage registers, enabling precise control over data transfer. The device includes a serial input (DS) and a serial output (Q7S) for cascading, as well as an asynchronous reset input (MR) to reset the shift register. The output enable input (OE) allows the outputs to be set to a high-impedance OFF-state, which does not affect the state of the registers.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| VCC | 1.2 - 5.5 | V |
| Logic Switching Levels | CMOS/LVTTL | |
| Output Drive Capability | ± 24 | mA |
| tpd (Propagation Delay) | 4.0 | ns |
| fmax (Maximum Frequency) | 180 | MHz |
| Number of Bits | 8 | |
| Power Dissipation Considerations | Low | |
| Tamb (Ambient Temperature) | -40 to +125 | °C |
| Rth(j-a) (Thermal Resistance Junction to Ambient) | 91 | K/W |
| Ψth(j-top) (Thermal Resistance Junction to Top) | 9.3 | K/W |
| Rth(j-c) (Thermal Resistance Junction to Case) | 51 | K/W |
| Package Name | SO16 (SOT109-1) |
Key Features
- 8-bit Serial-in/Serial or Parallel-out Shift Register: Allows for both serial and parallel data output, enhancing flexibility in design.
- 3-state Outputs: Outputs can be set to a high-impedance OFF-state, which does not affect the state of the registers.
- Separate Clocks for Shift and Storage Registers: Enables precise control over data transfer between the shift and storage registers.
- Asynchronous Reset Input (MR): Allows for resetting the shift register with a LOW input.
- Cascading Capability: Features a serial input (DS) and a serial output (Q7S) for cascading multiple devices.
- Mixed Voltage Environment Compatibility: Inputs can be driven from either 3.3 V or 5 V devices, making it suitable for mixed voltage systems.
- Low Power Dissipation: Designed with low power dissipation considerations, making it energy-efficient.
Applications
The 74LVC595AD is versatile and can be used in a variety of applications across different industries, including:
- Automotive Systems: For data processing and storage in automotive electronics.
- Industrial Control Systems: In control circuits and data processing units.
- Consumer Electronics: In devices such as TVs, audio equipment, and other consumer electronics.
- Mobile Devices: For data handling and storage in mobile phones and tablets.
- Wearables and IoT Devices: For efficient data management in wearables and Internet of Things (IoT) devices.
Q & A
- What is the primary function of the 74LVC595AD?
The primary function is to act as an 8-bit serial-in/serial or parallel-out shift register with a storage register and 3-state outputs.
- What are the voltage ranges for VCC?
The VCC voltage range is from 1.2 V to 5.5 V.
- How does the device handle mixed voltage environments?
The device can handle inputs driven from either 3.3 V or 5 V, making it suitable for mixed voltage systems.
- What is the purpose of the asynchronous reset input (MR)?
The asynchronous reset input (MR) resets the shift register when set to LOW.
- Can the outputs be set to a high-impedance state?
Yes, the outputs can be set to a high-impedance OFF-state using the output enable input (OE).
- What is the maximum frequency of operation?
The maximum frequency of operation is 180 MHz.
- What is the propagation delay (tpd) of the device?
The propagation delay (tpd) is 4.0 ns.
- What are the thermal resistance values for the SO16 package?
The thermal resistance values are Rth(j-a) = 91 K/W, Ψth(j-top) = 9.3 K/W, and Rth(j-c) = 51 K/W.
- In what temperature range can the device operate?
The device can operate in the temperature range of -40°C to +125°C.
- What package types are available for the 74LVC595A series?
The available package types include SO16 (SOT109-1), TSSOP16 (SOT403-1), and DHVQFN16 (SOT763-1).
