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Name: 74HC245D
Brand: Toshiba Semiconductor and Storage
SKU: 74HC245D
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 74HC245D

Part No.:: 74HC245D

Manufacturer:: Toshiba Semiconductor and Storage

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

Datasheet:: 74HC245D.pdf

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

In Stock:: 3840

Quantity:: Add To Cart

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74HC245D Specifications

Package/Case:
20-SOIC (0.295, 7.50mm Width)
Packaging:
Tape & Reel (TR),Cut Tape (CT),Digi-Reel®
Series:
74HC
ProductStatus:
Active
LogicType:
Transceiver, Non-Inverting
NumberofElements:
1
NumberofBitsperElement:
8
InputType:
-
OutputType:
3-State
Current-OutputHighLow:
7.8mA, 7.8mA
Voltage-Supply:
2V ~ 6V
OperatingTemperature:
-40°C ~ 125°C (TA)
MountingType:
Surface Mount

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74HC245D information

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74HC245D Typical application Circuitry

74HC245D

The 74HC245D is a versatile chip, well-known in the electronics world. At its heart, it's an octal transceiver featuring non-inverted 3-state outputs. Essentially, it can both send and receive eight bits of data, making it an invaluable component in digital systems.

Features of 74HC245D:

- Octal Bidirectional Bus Interface: The 74HC245D is designed with eight channels for bidirectional data flow, hence 'octal'.

- 3-State Outputs:The output can take on a high, low, or high-impedance state thanks to this functionality. High-impedance effectively renders the chip 'invisible' in a circuit, preventing it from driving the bus.

- Direction Control: A unique feature of the 74HC245D is its ability to control the data flow direction via a single pin.

Where might you find 74HC245D in action?

- Bus Isolation: When multiple devices share a common bus, the 74HC245D can isolate one segment from another.

- Level Translation: It's an intermediary between devices operating at different voltage levels.

- Backplane Data Transmission: In larger systems with multiple boards, the chip can manage data traffic between them.

Application Scenario: Bus Isolation

Imagine a scenario where you have a microcontroller sharing a data bus with several peripherals. To avoid data clashes, you decide to implement the 74HC245D.

1. Power Supply:

- VCC (Pin 20): The power supply pin is this. Typically, you'd connect this to a +5V source.

- GND (Pin 10): As expected, this pin needs grounding.

2. Data Bus Configuration:

- A0-A7 (Pins 2, 4, 6, 8, 11, 13, 15, 17): These are your data inputs. In our case, they'll be connected to the microcontroller's data pins.

- B0-B7 (Pins 18, 16, 14, 12, 9, 7, 5, 3): The data outputs, which you'll link to the shared data bus.

3. Directional Control:

- DIR (Pin 1): This pin determines data flow. A HIGH signal allows data from A (microcontroller) to B (data bus). Conversely, a LOW signal enables data flow from B to A.

4. Enable Control:

- OE (Pin 19): It's the Output Enable pin. A LOW signal here activates the outputs, while a HIGH signal turns them off, placing them in the high-impedance state.

Design Tips:

- Bypass Capacitance: A capacitor of around 0.1µF between VCC and GND (close to the 74HC245D) can filter out voltage spikes, providing stable operation.

- Bus Management: When using multiple transceivers on a single bus, ensure only one is active at a time to prevent data corruption.

- Decoupling: With any IC, decoupling capacitors help in reducing noise. Place them close to the IC for optimal performance.

To encapsulate, the 74HC245D is a vital tool in a designer's toolbox. With its ability to control data flow direction and effectively isolate sections of a bus, it ensures smooth communication in complex digital systems. When implementing it, always consider potential data clashes and electrical noise. Your data will arrive intact and on schedule thanks to good design.

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6. What is the process for return or replacement of 74HC245D?

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 74HC245D we delivered, we will accept the replacement or return of the 74HC245D 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 74HC245D.

(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