SN74ACT373 Octal Transparent D-Type Latches

The SN74ACT373 is a high-performance, octal transparent D-type latch with 3-state outputs designed by Texas Instruments. This integrated circuit is part of the 74ACT family, which is known for its high-speed CMOS logic operating with advanced AC series technology.

Constructed with eight latches, the SN74ACT373 has inputs that include eight data lines (D0 to D7), a Latch Enable (LE) input, and an Output Enable (OE) bar. When LE is high, the data on the D inputs are transferred into the latch. The data is held stable when LE returns to low, making it an ideal choice for capturing and holding data. The OE bar input is used to place the eight outputs in either a normal logic state or a high-impedance state. When OE is high, the outputs are in a high-impedance state, which allows for bus sharing or for the outputs to be used as inputs in a new data operation.

Key features of the SN74ACT373 include:

• High-speed operation: typically 4.5 ns at 5 V
• Low power consumption: 80 µA maximum ICC
• 3-state outputs drive bus lines or buffer memory address registers
• Outputs source/sink 24 mA at 5V
• Functionally identical to the 74AS373 and 74ALS373
• Wide operating voltage range of 4.5 V to 5.5 V

The SN74ACT373 is commonly used in situations requiring temporary storage of data, output buffering, and bus-oriented systems. Its robust design ensures that it can perform reliably in a wide range of applications, from industrial to commercial electronics. The device is available in multiple package types, including PDIP, SOIC, and SSOP, providing flexibility for different PCB layouts and space constraints.

For detailed technical specifications, timing diagrams, and application notes, designers and engineers are encouraged to consult the official datasheet provided by Texas Instruments. The SN74ACT373 is a testament to Texas Instruments' commitment to providing high-quality, reliable components for the electronics industry.