SN74HCT573DWRG4 Octal Transparent D-Type Latches with 3-State Outputs

The SN74HCT573DWRG4 from Texas Instruments is a high-performance, octal transparent D-type latch with 3-state outputs designed for 4.5-V to 5.5-V VCC operation. This integrated circuit is part of the HCT family, which is characterized by its high noise immunity and low power consumption, making it suitable for interfacing with TTL levels. It is commonly used in a wide range of digital applications, from computers and data storage to industrial controls and consumer electronics.

The device features eight latches with three-state outputs for bus-oriented applications. The latches appear transparent to data when the latch-enable (LE) input is high. When LE is taken low, the data that meets the setup time requirements on the D inputs is latched. Data appears on the outputs when the output-enable (OE) input is low. When OE is high, the outputs are in a high-impedance state, which means they neither load the bus nor drive it, allowing for bus line control in a shared-output environment.

Constructed with inputs and outputs on opposite sides of the package, the SN74HCT573DWRG4 allows for easier interface with microprocessors, microcontrollers, and other logic systems. The device comes in a wide-body SOIC package, which is denoted by the DW suffix in the part number, and it is provided in a tape and reel format indicated by the 'R' at the end of the part number for use in automated manufacturing environments.

Key features of the SN74HCT573DWRG4 include:

• Wide operating voltage range of 4.5V to 5.5V
• High current 3-state outputs can drive up to 15 LSTTL loads
• Low power consumption, 80-µA maximum ICC
• Typical tpd = 13 ns
• ±6-mA output drive at 5 V
• Low input current of 1 µA maximum
• Direct bus connection when high impedance is not needed
• Complies with JEDEC standard no. 7A

Overall, the SN74HCT573DWRG4 is a reliable and versatile component for designers looking to incorporate transparent latches with high drive capability and low power consumption into their digital systems.