Overview
The SN74ACT573PWRE4 is an octal D-type transparent latch with 3-state outputs, manufactured by Texas Instruments. This component is part of the ACT family, which is known for its high-speed and low-power consumption. The device features eight D-type latches that can operate in a transparent mode when the latch-enable (LE) input is high, allowing the Q outputs to follow the D inputs. When the LE input is taken low, the Q outputs are latched at the logic levels set up at the D inputs. The outputs can be placed in a high-impedance state using the output-enable (OE) input, making it suitable for bus-organized systems without the need for interface or pull-up 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 |
| Input Clamp Current (VI < 0 or VI > VCC) | -20 | 20 | mA |
| Output Clamp Current (VO < 0 or VO > VCC) | -20 | 20 | mA |
| Continuous Output Current (VO = 0 to VCC) | -50 | 50 | mA |
| Continuous Current through VCC or GND | -200 | 200 | mA |
| Storage Temperature Range | -65 | 150 | °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 |
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 SSOP, SOIC, TSSOP, and VQFN.
Applications
- Buffer registers: For temporary storage and buffering of data.
- Bidirectional bus drivers: To manage data flow in both directions on a bus.
- Working registers: For temporary storage and manipulation of data within a system.
- I/O ports: For input/output operations in digital systems.
Q & A
- What is the operating voltage range of the SN74ACT573PWRE4?
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 is used to place the outputs in either a normal logic state or the high-impedance state.
- What are the typical applications of the SN74ACT573PWRE4?
Typical applications include buffer registers, bidirectional bus drivers, working registers, and I/O ports.
- What are the package options available for the SN74ACT573PWRE4?
The device is available in SSOP, SOIC, TSSOP, and VQFN packages.
- What is the storage temperature range for the SN74ACT573PWRE4?
The storage temperature range is from -65°C to 150°C.
- What is the recommended bypass capacitor for the power supply?
Texas Instruments recommends a 0.1-µF capacitor for single supply devices and 0.01-µF or 0.022-µF capacitors for each power pin if there are multiple VCC pins.
- What is the maximum continuous output current?
The maximum continuous output current is ±50 mA.
- What is the maximum continuous current through VCC or GND?
The maximum continuous current through VCC or GND is ±200 mA.
- How does the latch-enable (LE) input affect the outputs?
When the LE input is high, the Q outputs follow the D inputs. When the LE input is taken low, the Q outputs are latched at the logic levels set up at the D inputs.
