The HD74HCT373P is a high-speed CMOS octal transparent latch with 3-state outputs manufactured by Renesas Electronics America. This device contains eight D-type latches with a common enable (LE) input and 3-state outputs controlled by an output enable (OE) input. When the latch enable (LE) is high, the Q outputs follow the data (D) inputs. When LE is low, the data is latched. The output enable (OE) controls whether the outputs are enabled (low) or in a high-impedance state (high). It's widely used for data storage, buffering, and address latching applications.

Applications:

• Data storage and buffering
• Address latching
• Microprocessor systems
• Memory interface circuits
• I/O port expansion
• Data bus isolation

Features:

• High-speed operation: tpd = 18 ns (typical) at VCC = 5V
• Low power dissipation: ICC = 8 μA (maximum) at VCC = 5V
• Wide operating voltage range: VCC = 4.5V to 5.5V
• 3-state outputs for bus interface
• Octal configuration for handling 8 bits of data
• TTL compatible inputs

Benefits:

• Provides temporary data storage and buffering.
• Allows for address latching in microprocessor systems.
• Enables easy interfacing with data buses using 3-state outputs.
• High-speed performance for fast data transfer.
• Low power consumption minimizes energy usage.
• Simple interface with TTL compatible inputs.

Additional Details:

The HD74HCT373P is available in a 20-pin DIP package. The 3-state outputs allow multiple devices to share a common data bus. The HCT designation indicates that the inputs are TTL compatible. When OE is high, the outputs are in a high-impedance state, effectively disconnecting the device from the bus. The CMOS technology provides high noise immunity and low power consumption. The operating temperature range is typically -40°C to +85°C. This part is essential in microprocessor based systems for demultiplexing the address and data bus, and isolating memory during read/write operations.