The TC74HC373AF(EL) is a high-speed octal D-type transparent latch with three-state outputs from Toshiba Semiconductor and Storage, belonging to the High-speed CMOS (HC) logic family. This device operates with a supply voltage of 2V to 6V. The eight latches are transparent, meaning the outputs (Q0-Q7) follow the data inputs (D0-D7) when the latch enable (LE) is HIGH. When LE is LOW, the latches store the data that was present at the inputs. The output enable (OE) input, when HIGH, forces the outputs to a high-impedance state. It's ideal for temporary data storage and bus interfacing applications.

Applications:

• Data storage
• Address latching
• Bus interfacing
• Memory data registers
• Input/Output ports

Features:

• High-speed operation: tpd = 15 ns (typ.) at VCC = 5V
• Wide operating voltage range: VCC = 2V to 6V
• Low power consumption: ICC = 1 μA (max.) at VCC = 5V
• Octal D-type latches
• Three-state outputs
• Output enable (OE) control
• Symmetrical output drive: |IOH| = IOL = 4 mA
• Wide operating temperature range: -40°C to +85°C
• Package: SOIC20 (Small Outline Integrated Circuit)

Benefits:

• Fast data latching for high-performance systems
• Low power consumption for energy efficiency
• Temporary data storage with transparent mode
• Bus isolation with three-state outputs
• Suitable for a wide range of voltage levels
• Directly drives LEDs and other low-current loads
• Compact size for space-constrained applications

Additional Details:

The TC74HC373AF(EL) is fabricated using silicon gate CMOS technology. The device's inputs are equipped with clamp diodes. The 'AF' suffix denotes a surface mount package (SOIC20), and the 'EL' indicates an environmentally friendly lead-free version. This latch is used extensively in microprocessor systems for address latching and data buffering. The three-state outputs make it suitable for shared bus architectures, allowing multiple devices to drive the bus at different times. The transparent mode simplifies data transfer when latching is not required.