Overview
The SN74AC573PWR is an octal D-type transparent latch with 3-state outputs, manufactured by Texas Instruments. This component is part of the 74AC family, known for its high-speed and low-power CMOS logic. The device features eight D-type latches with 3-state outputs, making it suitable for various applications requiring data storage and bus management.
When the latch-enable (LE) input is high, the Q outputs follow the data (D) inputs. When LE is taken low, the Q outputs are latched at the logic levels set up at the D inputs. A buffered output-enable (OE) input allows the outputs to be placed in either a normal logic state or a high-impedance state, which is useful for driving bus lines without additional interface components.
Key Specifications
| Parameter | Min | Max | Unit |
|---|---|---|---|
| VCC Supply Voltage Range | -0.5 | 7 | V |
| Input Voltage Range | -0.5 | VCC + 0.5 | V |
| Output Voltage Range | -0.5 | VCC + 0.5 | V |
| Continuous Output Current | ±50 | mA | |
| Continuous Current through VCC or GND | ±200 | mA | |
| Storage Temperature Range | -65 | 150 | °C |
| Operating Temperature Range | -40 | 85 | °C |
| Pulse Duration, LE High (VCC = 5V) | 4 | 5 | ns |
| Setup Time, Data before LE↓ (VCC = 5V) | 3 | 3.5 | ns |
| Hold Time, Data after LE↓ (VCC = 5V) | 2 | 2 | ns |
| Propagation Delay Time (VCC = 5V) | 2.5 | 10 | ns |
| Package Type | TSSOP (PW) | ||
| Package Size | 6.5 mm × 6.4 mm |
Key Features
- Operation over a wide VCC range of 2V to 6V.
- Inputs accept voltages up to 6V.
- Maximum propagation delay time of 9ns at VCC = 5V.
- 3-State outputs capable of driving bus lines directly.
- Buffered output-enable (OE) input for high-impedance state control.
- Suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.
- Available in various package options including TSSOP, SOIC, SSOP, PDIP, and VQFN.
Applications
- Buffer registers: For temporary storage and buffering of data.
- Bidirectional bus drivers: For managing data flow in bus-organized systems.
- Working registers: For storing and manipulating data in real-time applications.
- I/O ports: For interfacing with external devices and systems.
- General logic circuits: Where high-speed and low-power logic operations are required.
Q & A
- What is the operating voltage range of the SN74AC573PWR?
The operating voltage range is from 2V to 6V.
- What is the maximum propagation delay time at VCC = 5V?
The maximum propagation delay time is 10ns.
- What is the purpose of the output-enable (OE) input?
The OE input allows the outputs to be placed in either a normal logic state or a high-impedance state.
- What are the typical applications of the SN74AC573PWR?
Typical applications include buffer registers, bidirectional bus drivers, working registers, and I/O ports.
- What is the package type and size of the SN74AC573PWR?
The package type is TSSOP (PW) with a size of 6.5 mm × 6.4 mm.
- What is the storage temperature range for the SN74AC573PWR?
The storage temperature range is from -65°C to 150°C.
- What is the continuous output current rating for the SN74AC573PWR?
The continuous output current rating is ±50 mA.
- How should the power supply be managed for the SN74AC573PWR?
Each VCC pin must have a good bypass capacitor to prevent power disturbance. TI recommends using a 0.1-µF capacitor for single supply devices.
- What are the thermal characteristics of the SN74AC573PWR?
The junction-to-ambient thermal resistance (RθJA) for the TSSOP package is approximately 126.2°C/W.
- What are the setup and hold times for the data input relative to the LE input at VCC = 5V?
The setup time is 3 to 3.5 ns, and the hold time is 2 ns.
