Device Overview:

️· Function: This is a dual 8-bit D-type latch with 3-state outputs. It's used for storing data.
️· Logic Family: LS TTL (Low-power Schottky TTL) – meaning it's designed for lower power consumption compared to standard TTL.
️· Package: Available in various packages (details in the document).

Key Features & Specifications:

️· Inputs: D (Data), Enable (E), Output Enable (OE).
️· Outputs: Q (Latching Output), Q' (Complementary Output). The 3-state outputs can be either active (driving a signal) or high-impedance (effectively disconnected).
️· Transparent Latch: When Enable (E) is HIGH, the latch is transparent, meaning the outputs follow the inputs. When E goes LOW, the latch stores the data present at the inputs at that moment.
️· 3-State Outputs: The outputs are disabled (high-impedance) when the Output Enable (OE) is LOW. This allows multiple devices to share a common bus.
️· Voltage: Designed for a 5V supply (though the datasheet specifies ranges).
️· Propagation Delay: Propagation delays are specified for various transitions (data to output, enable to output, etc.), with typical values around 1.3-4.1ns.
️· Power Consumption: Specifications for quiescent supply current (ICCH, ICCL, ICCZ) and additional current per input are given.
️· AC Characteristics: Detailed timing parameters like setup time, hold time, enable pulse width are specified.

Important Sections of the Datasheet:

️· Logic Diagram: Shows the internal connections of the latch.
️· Pin Configuration: Identifies each pin and its function.
️· DC Electrical Characteristics: Specifies the voltage levels and current limits.
️· Switching Characteristics (AC Characteristics): Details the timing parameters for signal propagation.
️· Test Circuit and Waveforms: Shows how the device is tested and the waveforms used in those tests.
️· Package Diagram: Illustrates the physical dimensions of the package.

Applications:

This type of latch is commonly used in:

️· Data storage
️· Buffering
️· Multiplexing/Demultiplexing
️· Address Decoding
️· Bus interfacing



This is a very thorough datasheet, providing all the necessary information for engineers to design with this device.