SN74HCT573 Octal Transparent D-Type Latches with 3-State Outputs

The SN74HCT573 is a high-performance, octal transparent D-type latch designed by Texas Instruments. This integrated circuit is a significant component in digital systems, where it provides temporary data storage and output buffering with 3-state capabilities. The device is part of the HCT (High-speed CMOS, TTL compatible) family, ensuring compatibility with a wide range of digital systems.

With its eight latches, the SN74HCT573 can store eight bits of data when the latch-enable (LE) input is high. The data on its D inputs is transferred to the corresponding Q outputs. When LE is taken low, the Q outputs are latched at the levels set up at the D inputs. This feature makes it an ideal choice for interface applications where data needs to be held and bus contention is to be avoided, as the 3-state outputs can be placed in a high-impedance mode.

The device operates over a broad voltage range from 4.5V to 5.5V and features a typical latch-up performance of ±250mA, which is tested to JESD 17 standards. It also boasts a wide operating temperature range, making it suitable for various industrial and commercial applications. The SN74HCT573 is designed for use in systems that require high-speed, low-power operation and is available in multiple package options, including SOIC, PDIP, and TSSOP, providing flexibility for different PCB layouts and space constraints.

Key features of the SN74HCT573 include:

• Eight D-type latches with 3-state outputs
• Wide operating voltage range of 4.5V to 5.5V
• Direct LSTTL input logic compatibility, V_IL = 0.8V (Max), V_IH = 2V (Min)
• CMOS input compatibility, I_l ≈ 1µA at V_OL, V_OH
• Edge-triggered latching functionality
• Support for high-speed operation
• ESD protection exceeds JESD 22

The SN74HCT573 is ideal for implementing in registers, I/O ports, bidirectional bus drivers, and working memory. Its robust design and technical specifications ensure reliable performance in a broad range of digital applications, solidifying its place as a go-to component for designers and engineers.