NXP 74HC75D Quad Bistable Transparent Latch

The NXP 74HC75D is a high-speed Si-gate CMOS device that is part of the 74HC/HCT family, known for its robust performance and compatibility with TTL (Transistor-Transistor Logic) levels. This integrated circuit is designed to offer a quad bistable transparent latch with four separate latch enable inputs (LE), four data inputs (D), and four outputs (Q).

The 74HC75D is encapsulated in a 16-pin SO (Small Outline) package, which is widely used in electronic applications where space-saving is crucial. The device operates with a supply voltage range of 2.0 to 6.0 V, which allows it to be used in a variety of digital applications, from low-voltage portable equipment to high-speed microprocessors.

Each latch within the 74HC75D is a D-type flip-flop that can be used to store data by holding the latch enable (LE) high. The transparent nature of the latch means that when LE is high, the Q outputs follow the data (D) inputs. When LE is taken low, the information that was present at the D inputs at the time the transition occurred is retained at the Q outputs until the latch enable is permitted to go high again.

The 74HC75D features a fast propagation delay, ensuring quick response times for critical applications. Additionally, the low power consumption of the CMOS technology makes this latch an excellent choice for battery-operated devices. It also has a high noise immunity and the ability to drive 10 LS-TTL loads, which provides a good margin for signal integrity in electrically noisy environments.

Applications for the 74HC75D are diverse, including but not limited to memory storage and holding registers, buffer storage, and signal gating. Its reliability and versatility make it a valuable component for designers who require stable and dependable latching functions in their digital logic circuits.

Overall, the NXP 74HC75D is a practical choice for those looking for a transparent latch solution that combines high-speed performance with the low power consumption and high noise immunity inherent to CMOS technology.