The MC74LS373N is an octal D-type transparent latch manufactured by Motorola (now Freescale/NXP Semiconductors). This integrated circuit is commonly used in digital systems for temporary data storage and buffering applications. It features eight individual D-type latches, each with its own data input (D) and output (Q), and a common latch enable (LE) input.

Applications

• Data buffering in microprocessor systems
• Address latching in memory systems
• I/O port expansion
• Display multiplexing
• General-purpose registers

Features

• Octal D-type transparent latches
• 3-state outputs for bus interfacing
• Low-power Schottky TTL (LS-TTL) technology
• High output drive capability
• Common latch enable (LE) input
• DIP-20 package

Benefits

• Temporary data storage
• Provides isolation between data sources and destinations
• Reduces loading on data buses
• Easy interfacing with TTL and CMOS logic
• Cost-effective solution for data latching applications

Additional Details

The MC74LS373N operates as a transparent latch, meaning that when the latch enable (LE) input is high, the Q output follows the D input. When the LE input transitions low, the data present on the D input at that moment is latched and held at the Q output, regardless of subsequent changes on the D input. The 3-state outputs allow the device to be connected to a data bus without loading the bus when the output is disabled. The low-power Schottky TTL (LS-TTL) technology provides a good balance between speed and power consumption. The device operates from a 5V power supply. The N suffix indicates a plastic DIP (Dual In-line Package). The output drive capability is sufficient for driving multiple TTL loads. The LS family is known for its good noise margin. Refer to the specific NXP/Freescale datasheet for detailed electrical characteristics, timing parameters, and application information. It is used extensively in older microprocessor and digital circuits due to its cost and simplicity.

These latches are essential components in many digital systems, allowing for the controlled storage and transfer of data between different parts of the circuit.