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Name: SN74HC245DWRE4
Brand: Texas Instruments
SKU: SN74HC245DWRE4
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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Texas Instruments SN74HC245DWRE4

Part No.:: SN74HC245DWRE4

Manufacturer:: Texas Instruments

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

Datasheet:: SN74HC245DWRE4.pdf

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

In Stock:: 3734

Quantity:: Add To Cart

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SN74HC245DWRE4 Specifications

Package/Case:
20-SOIC (0.295, 7.50mm Width)
Packaging:
Tape & Reel (TR),Cut Tape (CT),Digi-Reel®
Series:
74HC
ProductStatus:
Discontinued at Mosen
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 ~ 85°C (TA)
MountingType:
Surface Mount

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SN74HC245DWRE4 information

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SN74HC245DWRE4 Typical application Circuitry

SN74HC245DWRE4

The SN74HC245DWRE4 is a chip with an octal bus transceiver and 3-state outputs. It is commonly used for bidirectional data transfer between two buses, making it a versatile component in digital electronics. Here, we will explore its functionality, typical applications, key parameter features, and provide a detailed circuit example.

Functionality:

The SN74HC245DWRE4 acts as a buffer and level shifter for bidirectional data transfer. It has eight data input/output pins (A1-A8 and B1-B8) that can connect two buses, A and B. The direction of data flow is controlled by the direction control pin, typically labeled DIR.

Typical Applications:

1. Parallel to Serial Data Conversion: The SN74HC245DWRE4 can be used to convert parallel data from a microcontroller or FPGA into serial data for transmission over a serial communication bus, such as SPI or UART.

2. Voltage Level Shifting: It can interface between devices operating at different voltage levels, ensuring compatibility and safe data transfer.

3. Bus Isolation: In systems with multiple buses, this chip can isolate and buffer data between them, preventing bus contention.

Parameter Features:

- Supply Voltage (VCC): Typically operates at 2V to 6V, making it compatible with a wide range of voltage levels.

- Output Drive Capability: Can drive outputs up to 6mA at 5V, ensuring strong signal levels.

- Propagation Delay (tPD): The time it takes for a change in input to affect the output, typically around 10ns.

- Operating Temperature: This device can function between -40°C and 85°C.

Example Circuit: Converting Parallel to Serial Data:

In this example, we'll use the SN74HC245DWRE4 to convert parallel data to serial data for communication with an SPI device. This is a common application in microcontroller projects.

Circuit Diagram:

- Connect the A1-A8 pins to the parallel data source (e.g., microcontroller GPIO pins).

- Connect the B1-B8 pins to the SPI master's data output.

- Connect the DIR pin to the microcontroller's control pin to select data direction (high for A to B, low for B to A).

- Attach VCC and GND to the proper ground and power supply connections.

Taking into account:

1. Voltage Levels: Verify that the SPI device's and the parallel data source's voltage levels are within the voltage range of the SN74HC245DWRE4.

2. Signal Integrity: Be mindful of signal integrity, particularly in cases where high-frequency signals are used in the data transfer. Signal routing and grounding must be done correctly.

3. Control Signal: Properly control the DIR pin to select the desired data direction, ensuring data flows in the correct direction.

4. Power Supply: Provide a stable power supply voltage within the specified range to the chip.

In summary, the SN74HC245DWRE4 is a versatile chip for bidirectional data transfer and voltage level shifting in digital circuits. It finds applications in various scenarios where data needs to be transferred between different buses or devices. When designing a circuit using this chip, it's crucial to consider voltage compatibility, signal integrity, control signals, and power supply for reliable operation.

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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 SN74HC245DWRE4.

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

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