74HC373D

The 74HC373D, from Toshiba, is a high-speed D-type transparent latch with 3-state outputs integrated circuit (IC). This means it's a tiny electronic chip packed with logic gates specifically designed for storing and controlling digital data. Here's a breakdown of its key features:

Function:

• D-type latch: It "latches" data, meaning it captures and holds the value present on its data input (D) when the latch enable (LE) signal goes high. This stored value remains even if the input changes, until the latch is cleared.
• Transparent: The data input is directly visible at the output (Q) while the latch enable is low, allowing data to pass through without being stored.
• 3-state outputs: Both output pins (Q and ) can be switched to a high-impedance state, essentially disconnecting them from the circuit, when the output enable (OE) signal goes low. This is useful for isolating the latch from other components or preventing unwanted signal interactions.

Technical Specifications:

• Package: SOIC20: A surface-mount package with 20 tiny leads for easy integration onto printed circuit boards.
• Supply voltage: Operates between 2 V and 6 V, compatible with a wide range of power sources.
• Propagation delay: Typical delay of 11 ns between data input and output, making it suitable for high-speed applications.
• Power dissipation: 500 mW, indicating moderate power consumption.
• Operating temperature range: -40°C to +125°C, capable of functioning in harsh environments.

Applications:

• Data buffering: Temporarily storing digital data between processing units or during signal transmission.
• Pulse shaping: Converting short pulses into clean, consistent logic levels.
• Glitch rejection: Filtering out unwanted noise spikes on data lines.
• Control logic: Implementing various logic functions in digital circuits.

Alternatives:

• 74HCT373D: Similar features as the 74HC373D but operates at lower power consumption and wider supply voltage range (4.5 V to 15 V).
• SN74LS373: Equivalent latch from Texas Instruments with slightly slower switching speeds but broader operating temperature range (-55°C to +125°C).

Overall, the 74HC373D is a versatile and reliable latch IC offering high speed, low power consumption, and flexible control options. It's a valuable building block for various digital circuits requiring data storage, pulse manipulation, and noise reduction.