The MC74LCX373DTR2G from onsemi is a state-of-the-art low-voltage octal D-type latch engineered for high-performance bus interface applications. This integrated circuit is specifically designed to address the needs of modern digital systems where interfacing between mixed-voltage domains is a common and critical requirement.
A primary feature of this device is its 5V tolerant inputs and outputs. This capability is crucial for ensuring robust communication and reliable interoperability within systems that incorporate both newer low-voltage core logic (e.g., 1.8V, 2.5V, or 3.3V) and legacy 5V components. The latch can safely accept input signals up to 5.5V, even when its own VCC supply is as low as 2.0V, effectively protecting more sensitive downstream low-voltage circuitry. Similarly, its outputs can be pulled to 5.5V without causing damage, making it an ideal bidirectional buffer in multi-voltage environments.
The MC74LCX373DTR2G operates at an ultra-low voltage of 2.0V to 3.6V, which significantly reduces overall power consumption compared to traditional 5V logic families. Despite its low-voltage operation, it delivers high-speed performance, with propagation delays typically just a few nanoseconds. This combination of low power dissipation and high speed is essential for portable, battery-operated devices and high-speed computing applications where efficiency and performance are paramount.
The device incorporates eight D-type latches with 3-state outputs. The output enable (OE) input provides direct control over the outputs, allowing them to be placed in a high-impedance state. This is vital for creating a non-conflicting interface when the latch is connected to a common bus line shared by multiple devices. The latch enable (LE) input controls the data flow; when LE is high, the outputs (Q) transparently follow the data inputs (D). A high-to-low transition on LE latches and retains that data until the next high LE signal.
Housed in a space-saving TSSOP-20 surface-mount package, the "DTR2G" suffix denotes a tape and reel packaging format, making it perfectly suited for automated high-volume assembly processes on modern PCB production lines.
ICGOOODFIND: The onsemi MC74LCX373DTR2G stands out as a highly efficient and robust solution for modern digital design. Its core strengths lie in its seamless 5V tolerance and low-voltage operation, which simplify system-level voltage translation. The high-speed performance and 3-state outputs make it an indispensable component for managing data flow in high-density, mixed-voltage bus applications, from networking equipment to industrial control systems.
Keywords: 5V Tolerant, Low-Voltage CMOS, Octal D-Type Latch, 3-State Outputs, Bus Interface.
