The MC74LCX16373DTR2: A Robust 16-Bit Latch for Modern Low-Voltage Systems

In the realm of digital logic design, interfacing between components operating at different voltage levels is a common yet critical challenge. The MC74LCX16373DTR2 from onsemi is a highly integrated solution engineered to address this very need. This 16-bit transparent latch is a cornerstone for designers seeking reliable data buffering and temporary storage in mixed-voltage environments.

A primary feature of this IC is its true 5V-tolerant inputs and outputs. This capability is paramount, allowing the device to seamlessly interface with higher voltage legacy 5V logic systems while its core operates at a modern low-voltage supply (2.0V to 3.6V). This eliminates the need for additional level-shifting circuitry, simplifying board design and reducing both component count and overall system cost.

The device is built using advanced CMOS technology, which is synonymous with low power consumption. This makes it exceptionally suitable for power-sensitive applications, including portable and battery-operated devices. Furthermore, the technology contributes to its impressive high-speed performance, with propagation delays typically under 5.5 ns, ensuring data integrity even in demanding, high-throughput systems.

The "transparent" nature of the latch means that while the enable (LE) signal is high, the Q outputs will actively follow the data (D) inputs. When LE is taken low, the data is latched and held stable at the outputs until the next high enable signal. The active-low Output Enable (OE) input provides a crucial third-state control, allowing the outputs to be placed in a high-impedance state. This is essential for preventing bus contention in multi-master systems, such as data buses and backplanes, where multiple devices share a common communication line.

Housed in a space-saving TSSOP-48 package, the MC74LCX16373DTR2 offers excellent functional density. Its robust design also includes ESD protection and balanced output drive, enhancing its durability and signal integrity in real-world operating conditions.

ICGOOODFIND: The onsemi MC74LCX16373DTR2 is an optimal choice for system architects requiring a high-density, bidirectional latch that ensures safe and efficient operation across mixed 3.3V and 5V domains. Its blend of voltage tolerance, low power, and high-speed performance makes it a versatile and reliable component for a wide array of modern digital applications.

Keywords: 5V-Tolerant, Low-Voltage CMOS, 16-Bit Transparent Latch, High-Speed Performance, Three-State Outputs.