Overview
The SN74HC573ADWRG4, produced by Texas Instruments, is an octal transparent D-type latch with 3-state outputs. This device is designed to drive highly capacitive or relatively low-impedance loads, making it suitable for a variety of applications in digital logic circuits. The SN74HC573A features a wide operating voltage range from 2 V to 6 V, low power consumption, and high-current 3-state outputs capable of driving bus lines directly or up to 15 LSTTL loads.
Key Specifications
| Parameter | Test Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|
| Operating Voltage Range | 2 V | 6 V | V | ||
| Output Drive at 5 V | IOH = –6 mA | 3.98 | 4.3 | V | |
| Output Drive at 6 V | IOH = –7.8 mA | 5.48 | 5.8 | V | |
| Input Current | VI = VCC or 0, VCC = 6 V | ±0.1 | ±100 | nA | |
| Propagation Delay (CL = 50 pF) | From D to Q, VCC = 4.5 V | 26 | 35 | 53 | ns |
| Power Consumption (ICC) | VI = VCC or 0, IO = 0, VCC = 6 V | 80 | µA | ||
| Thermal Resistance (RθJA) | DW (SOIC) Package | 109.1 | °C/W |
Key Features
- Wide Operating Voltage Range from 2 V to 6 V
- High-Current 3-State Outputs Drive Bus Lines Directly up to 15 LSTTL Loads
- Low Power Consumption: 80-µA Maximum ICC
- Typical Propagation Delay of 21 ns
- ±6-mA Output Drive at 5 V
- Low Input Current: 1 µA (Maximum)
- Bus-Structured Pinout
Applications
- Buffer Registers
- Bidirectional Bus Drivers
- Working Registers
- I/O Ports
Q & A
- What is the operating voltage range of the SN74HC573A?
The operating voltage range is from 2 V to 6 V. - What is the maximum output drive current at 5 V?
The maximum output drive current at 5 V is ±6 mA. - What is the typical propagation delay of the SN74HC573A?
The typical propagation delay is 21 ns. - What is the maximum power consumption of the SN74HC573A?
The maximum power consumption is 80 µA. - What types of loads can the SN74HC573A drive?
The SN74HC573A can drive bus lines directly or up to 15 LSTTL loads. - What is the purpose of the OE input in the SN74HC573A?
The OE input can place the outputs in either a normal logic state or the high-impedance state. - What is the thermal resistance (RθJA) for the DW (SOIC) package?
The thermal resistance (RθJA) for the DW (SOIC) package is 109.1 °C/W. - What are the common applications of the SN74HC573A?
Common applications include buffer registers, bidirectional bus drivers, working registers, and I/O ports. - How does the SN74HC573A handle power-up and power-down states?
To ensure the high-impedance state during power up or power down, OE must be tied to VCC through a pullup resistor. - What is the maximum frequency supported by the SN74HC573A?
The maximum frequency supported is 28 MHz.
