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Name: 74HC244D
Brand: Toshiba Semiconductor and Storage
SKU: 74HC244D
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 74HC244D

Part No.:: 74HC244D

Manufacturer:: Toshiba Semiconductor and Storage

Package:: 20-SOIC (0.295, 7.50mm Width)

Datasheet:: 74HC244D.pdf

Description:: IC BUFFER NON-INVERT 6V 20SOIC

In Stock:: 401

Quantity:: Add To Cart

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74HC244D Specifications

Package/Case:
20-SOIC (0.295, 7.50mm Width)
Packaging:
Tape & Reel (TR),Cut Tape (CT),Digi-Reel®
Series:
74HC
ProductStatus:
Active
LogicType:
Buffer, Non-Inverting
NumberofElements:
2
NumberofBitsperElement:
4
InputType:
-
OutputType:
3-State
Current-OutputHighLow:
7.8mA, 7.8mA
Voltage-Supply:
2V ~ 6V
OperatingTemperature:
-40°C ~ 85°C (TA)
MountingType:
Surface Mount

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74HC244D information

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74HC244D Typical application Circuitry

74HC244D

74HC244D is a high-speed Si-gate CMOS device, specifically an octal buffer and line driver featuring non-inverted, 3-state outputs. This chip provides a buffer between two parts of a circuit, ensuring that input and output remain isolated. The 3-state output mode means the output can be set to high, low, or high-impedance (off).

Primary Features of the 74HC244D:

- Octal Configuration: The 74HC244D consists of eight non-inverting buffers.

- 3-State Outputs: This feature allows multiple 74HC244D chips to be tied to a single data bus without interfering with one another.

- High Current Drive Capability: Suitable for driving high-capacitive or low-impedance loads.

Common Application Scenarios:

- Data Bus Buffering: 74HC244D can serve as an intermediary on a data bus, enabling or disabling data flow as needed.

- Driving Capacitive Loads: Due to its high current drive capability, it is apt for situations with capacitive loads.

- Input/Output Port Expansion: This chip can extend the I/O ports of microcontrollers or other digital devices.

Sample Application – Data Bus Buffering:

Let's explore using 74HC244D as a buffer on a data bus.

1. Power Connections:

- VCC (Pin 20): Connect to the positive supply voltage, typically +5V.

- GND (Pin 10): Connect to system ground.

2. Data Bus Connections:

- Inputs (A0-A7; Pins 2, 4, 6, 8, 11, 13, 15, 17): Connect these to the data bus or the device sending the data.

- Outputs (Y0-Y7; Pins 19, 18, 16, 14, 9, 7, 5, 3): Connect these to the destination device's data input or the main data bus.

3. Output Enable Control:

- OE1 and OE2 (Pins 1 and 19): These are the output enable pins. When LOW, the corresponding outputs are active. When HIGH, the outputs are in a high-impedance state. Depending on the application, you can control these pins with logic signals to activate or deactivate the buffers.

Key Design Considerations:

- Bypass Capacitors: Placing a 0.1µF bypass capacitor between VCC and GND near the 74HC244D will help stabilize its operation.

- Output Control: Always ensure that only one driver is active on a data bus. Multiple drivers can conflict and lead to bus contention.

- High-Impedance State: When the outputs are in high-impedance mode, they can easily pick up noise. Ensure that devices connected to these outputs handle high-impedance states appropriately.

In conclusion, 74HC244D offers a vital solution in digital electronics, especially where data integrity and isolation are paramount. Whether for buffering, driving, or expansion purposes, having a firm grasp of its functionalities ensures optimized circuitry performance.

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6. What is the process for return or replacement of 74HC244D?

All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the 74HC244D we delivered, we will accept the replacement or return of the 74HC244D only when all of the below conditions are fulfilled:

(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 74HC244D.

(3)The PartNo is unused and only in the original unpacked packaging.

Two processes to return the products:

(1)Inform us within 90 days

(2)Obtain Requesting Return Authorizations