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Name: 74HC574D
Brand: Toshiba Semiconductor and Storage
SKU: 74HC574D
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Any Feature, including a modified Existing Feature, that is not an Existing Feature.

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Toshiba Semiconductor and Storage 74HC574D

Part No.:: 74HC574D

Manufacturer:: Toshiba Semiconductor and Storage

Package:: 20-SOIC

Datasheet:: 74HC574D.pdf

Description:: IC FF D-TYPE SNGL 8BIT 20SOIC

In Stock:: 560

Quantity:: Add To Cart

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74HC574D Typical application Circuitry

74HC574D

A high-speed CMOS device from the 74HC family is the 74HC574D. It is an octal D-type flip-flop with three-state outputs that is intended for use in situations where data bits need to be captured and retained.

Application Scenarios

The 74HC574D is versatile, finding applications in data storage, communication systems, and digital signal processing where temporary storage of data is required. A common use case is in the creation of a data bus interface, where the 74HC574D can store data from a microprocessor and then transfer it to other parts of the system under controlled conditions.

Data Bus Interface Circuit Design

Crafting a data bus interface using the 74HC574D necessitates a precise understanding of its pin configuration and operational characteristics. Here's an elaborate guide:

Data Inputs Connection

Connecting Data Lines: Pins 2, 5, 6, 9, 12, 15, 16, and 19 (D0 to D7) of the 74HC574D serve as the data inputs. These pins should be connected to the data source, such as a microprocessor's output ports, allowing for the transmission of data into the flip-flop.

Output to Data Bus

Enabling Outputs: The outputs, pins 18, 13, 14, 11, 8, 7, 4, and 1 (Q0 to Q7), are connected to the data bus. These outputs are in 3-state mode, which means they can be in high, low, or high-impedance state. In bus systems, the high-impedance state is especially helpful since it allows several devices to connect to the bus simultaneously without interfering with one another.

Clock Pulse Integration

Clock Signal Application: Pin 11 (CP) is the clock input and triggers the data capture at the rising edge. This pin must be connected to a clock source that synchronizes the data transfer to and from the 74HC574D.

Output Control

Output Enable (OE): Pin 9 controls the output state. The outputs are active and the stored data is on the data bus when OE is low. The outputs are in a high-impedance condition when OE is high, which essentially disconnects the 74HC574D from the bus.

Considerations for Circuit Design

In the design of circuits involving the 74HC574D, several considerations must be addressed:

- Timing Requirements: The synchronization of the clock signal with data inputs is critical. Data must be stable before the clock's rising edge to ensure accurate capture.

- Power Supply Stability: The 74HC574D requires a stable power supply, typically +5V, connected to pin 20 (Vcc), with pin 10 (GND) grounded. Voltage fluctuations can impact the device's performance.

- Bus Contention: When designing a bus system, care must be taken to avoid contention. The 3-state outputs of the 74HC574D must be managed to ensure that only one device drives the bus at any time.

- Signal Integrity: Proper layout and decoupling techniques are necessary to maintain signal integrity, especially in high-speed applications or noisy environments.

Implementing a data bus interface with the 74HC574D showcases just one of its potential applications. The device's ability to latch data efficiently and interface directly with a bus system underlines its utility in complex digital circuits. A comprehensive understanding and application of the 74HC574D's operational parameters are essential for achieving robust and reliable circuit functionality.

74HC574D information

74HC574D Specifications

Packaging:
Tape & Reel (TR),Cut Tape (CT),Digi-Reel®
Series:
74HC
ProductStatus:
Active
Function:
Standard
Type:
D-Type
OutputType:
Tri-State, Non-Inverted
NumberofElements:
1
NumberofBitsperElement:
8
ClockFrequency:
59 MHz
MaxPropagationDelay@VMaxCL:
33ns @ 6V, 150pF
TriggerType:
Positive Edge
Current-OutputHighLow:
7.8mA, 7.8mA
Voltage-Supply:
2V ~ 6V
Current-Quiescent(Iq):
4 µA
InputCapacitance:
5 pF
OperatingTemperature:
-40°C ~ 85°C (TA)
MountingType:
Surface Mount

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(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.

(2)We are informed of the defect described above within 90 days after the delivery of 74HC574D.

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