Description

The 74HCT74D is a flip-flop electronic component that falls under the product category of Flip Flops. It is a dual positive edge triggered D-type flip-flop with several inputs and outputs. Unlike other flip-flops, this one has a Schmitt-trigger action in the clock input, which makes it highly tolerant to slower clock rise and fall times. It comes with clamp diodes that enable the use of current limiting resistors to interface inputs with voltages in excess of VCC.

Specifications and features

• Input levels: The 74HCT74D is specified under two input levels: For 74HC74, it is CMOS level, and for 74HCT74, it is TTL level.
• Symmetrical output impedance: This component comes with symmetrical output impedance.
• Low power dissipation: It is designed to dissipate low power, making it more energy-efficient.
• High noise immunity: The 74HCT74D has high noise immunity, making it resistant to electromagnetic interference.
• Balanced propagation delays: The component comes with balanced propagation delays.
• Compliance: The 74HCT74D is specified in compliance with JEDEC standard no. 7A.
• ESD protection: It is equipped with ESD protection features with HBM JESD22-A114F exceeding 2000V, and MM JESD22-A115-A exceeding 200V.
• Multiple package options: The 74HCT74D comes with multiple package options.
• Temperature stability: It is specified for operation from -40 °C to +85 °C and from -40 °C to +125 °C.

Application Scenarios

The 74HCT74D is commonly used in various electronic applications where flip-flops are utilized. It can be used for clock synchronization, digital counters, frequency division, and programmed logic arrays, among others.

Comparison

• The 74HCT74D has a Schmitt-trigger action that makes it highly tolerant to slower clock rise and fall times.
• It is designed with high noise immunity, making it resistant to electromagnetic interference.
• The component is designed with balanced propagation delays.
• It has ESD protection features to prevent damage from electrostatic discharge.
• The 74HCT74D is specified for operation from -40 °C to +85 °C and from -40 °C to +125 °C.

• The component's symmetrical output impedance can sometimes limit certain applications' output options.
• It may not be suitable for applications that require high-speed data transfer.
• It can be more expensive to purchase than other non-Schmitt-triggered flip-flops available in the market.