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Name: SN74HC245DWRG4
Brand: Texas Instruments
SKU: SN74HC245DWRG4
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 SN74HC245DWRG4

Part No.:: SN74HC245DWRG4

Manufacturer:: Texas Instruments

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

Datasheet:: SN74HC245DWRG4.pdf

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

In Stock:: 3738

Quantity:: Add To Cart

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SN74HC245DWRG4 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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SN74HC245DWRG4 information

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SN74HC245DWRG4 Typical application Circuitry

SN74HC245DWRG4

The SN74HC245DWRG4 is a chip that serves as an octal bus transceiver with 3-state outputs. It is commonly used to facilitate bidirectional data transfer between buses with different voltage levels or systems. Below, I will provide details on its functionality, typical applications, parameter characteristics, and a detailed circuit connection example.

Functionality:

The SN74HC245DWRG4 is designed to enable bidirectional data transfer between two buses. It can be used to buffer and level-shift signals between two systems, making it suitable for interfacing microcontrollers or digital logic operating at different voltage levels.

Typical Applications:

1. Level Shifting: It can be used to connect a 3.3V microcontroller to a 5V system, allowing data to be exchanged between them.

2. Bus Buffering: When connecting multiple devices to a common data bus, this chip can help prevent contention issues by enabling/disabling its outputs.

3. I/O Expansion: It's often used to expand the I/O capabilities of a microcontroller by connecting multiple devices to its I/O pins.

Parameter Characteristics:

- Supply Voltage: Typically operates from 2V to 6V.

- 8-Bit Bidirectional Buffers: Eight data pins (A1-A8 and B1-B8) for bidirectional data transfer.

- 3-State Outputs: Allows the outputs to be disabled (high impedance) when not in use.

- Schmitt-Trigger Inputs: Ensures noise immunity.

Now, let's look at a specific circuit connection example where the SN74HC245DWRG4 is used to interface a 3.3V microcontroller with a 5V system.

Circuit Connection Example:

In this scenario, we will connect the SN74HC245DWRG4 to enable bidirectional data transfer between a 3.3V microcontroller (MCU) and a 5V system. We'll use an Arduino (3.3V) as the MCU and a 5V sensor as the system.

1. SN74HC245DWRG4 Connections:

- A1-A8: Connect these pins to the MCU's data pins (e.g., D0-D7).

- B1-B8: Connect these pins to the sensor's data pins (e.g., DATA0-DATA7).

- DIR (Direction): Connect to a GPIO pin on the MCU to control the data direction.

- OE (Output Enable): Connect to another GPIO pin on the MCU to enable/disable outputs.

2. Voltage Level Shifting:

- VCCA (3.3V) connects to the MCU's power supply.

- VCCB (5V) connects to the sensor's power supply.

- GND pins connect to the respective ground terminals.

3. Control Logic:

- Use the MCU's GPIO pins to control the DIR and OE pins:

- Set DIR to HIGH to enable data transfer from A to B (MCU to sensor).

- Set DIR to LOW to enable data transfer from B to A (sensor to MCU).

- Set OE to LOW to enable the outputs when data transfer is needed.

- Set OE to HIGH to disable the outputs when not in use.

Design Considerations:

- Ensure proper power supply voltage (3.3V for MCU and 5V for the sensor).

- Implement level shifting to protect the MCU from 5V logic levels.

- Properly configure the control pins (DIR and OE) in your firmware to control data direction and output enable/disable.

- Take care of signal integrity and consider adding decoupling capacitors for stable operation.

In conclusion, the SN74HC245DWRG4 is a versatile chip for interfacing digital systems operating at different voltage levels. It is essential to understand its pinout and functionality to design effective circuits for data transfer between different devices.

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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.

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