The MC74LCX16373DTR2G: A High-Performance 16-Bit Transparent Latch for Modern Systems
In the realm of digital logic design, efficiently managing data flow across multiple buses is a fundamental requirement. The onsemi MC74LCX16373DTR2G addresses this need as a high-performance, 16-bit transparent latch engineered for seamless operation in low-voltage, mixed-voltage environments. This integrated circuit is part of the advanced LCX family, which combines low-voltage operation with 5V tolerance, making it an indispensable component for interfacing and temporary data storage applications.
A key feature of this latch is its 5V-tolerant inputs and outputs. This capability allows the device to be safely connected to higher voltage systems (e.g., 5V logic or legacy peripherals) while its core operates at a modern low-voltage supply (2.0V to 3.6V). This eliminates the need for level-shifting circuitry, simplifying board design and reducing component count. The outputs feature all-channel bus-drive capabilities, ensuring robust signal integrity when driving highly capacitive loads.
The device is organized as two independent 8-bit latches, each with its own latch enable (LE) and output enable (OE) control pins. When the LE input is held high, the Q outputs follow the D (data) inputs transparently. A high-to-low transition on the LE pin latches and retains the data present at that moment. The output enable input, when driven high, places the outputs in a high-impedance state, effectively disconnecting the latch from the bus and preventing data contention in multi-master systems. This tri-state control is vital for building bidirectional bus interfaces and shared memory architectures.
Constructed with advanced CMOS technology, the MC74LCX16373DTR2G offers a significant advantage in power-sensitive applications. It features dramatically lower power consumption than its bipolar counterparts. Furthermore, it incorporates a 26Ω series resistance in the output drivers, which helps to dampen overshoot and undershoot, reducing switching noise and minimizing electromagnetic interference (EMI). The device is also characterized for live insertion and removal, enhancing the reliability of hot-swappable systems.
Housed in a space-saving TSSOP-48 package, this latch is ideal for high-density PCB layouts found in a wide array of modern electronics, including networking equipment, telecommunications infrastructure, servers, workstations, and advanced industrial controllers.
ICGOOODFIND: The onsemi MC74LCX16373DTR2G is a robust and versatile solution for 16-bit data bus interfacing and buffering. Its combination of 5V tolerance, low power consumption, and tri-state outputs makes it exceptionally useful for designers creating systems that must bridge voltage domains while maintaining high performance and signal integrity.
Keywords: 5V Tolerant, Transparent Latch, Tri-State Output, Low-Voltage CMOS, Bus Interface
