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Name: SN74HC245NSR
Brand: Texas Instruments
SKU: SN74HC245NSR
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 SN74HC245NSR

Part No.:: SN74HC245NSR

Manufacturer:: Texas Instruments

Package:: 20-SOIC (0.209, 5.30mm Width)

Datasheet:: SN74HC245NSR.pdf

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

In Stock:: 8787

Quantity:: Add To Cart

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SN74HC245NSR Specifications

Package/Case:
20-SOIC (0.209, 5.30mm 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 ~ 85°C (TA)
MountingType:
Surface Mount

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SN74HC245NSR information

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SN74HC245NSR Typical application Circuitry

SN74HC245NSR

SN74HC245NSRis a chip with bidirectional voltage-level translation and 3-state outputs. It is commonly used to interface between devices with different voltage levels. Here, I will provide details on its functionality, application scenarios, parameter characteristics, and a specific circuit connection.

Functionality:

SN74HC245NSRis an octal bus transceiver, which means it can transmit data bidirectionally between two buses while isolating them electrically when needed. It's particularly useful when you need to connect devices operating at different voltage levels without damaging them.

Application Scenarios:

1. Level Shifting: One common application is interfacing a microcontroller (e.g., 3.3V) with external peripherals (e.g., 5V) or vice versa.

2. Bus Isolation:It can be used to isolate sections of a bus to prevent data collision.

3. Buffering: SN74HC245NSRcan be used as a buffer to strengthen weak signals.

Parameter Characteristics:

- Voltage Supply: Typically operates from 4.5V to 5.5V.

- High-Speed Operation: Provides fast data transmission rates.

- 8 Channels: It has 8 bidirectional channels.

- 3-State Outputs: Allows you to disconnect the bus when necessary.

Detailed Circuit Connection:

To illustrate a specific circuit connection, let's consider interfacing a 3.3V microcontroller with a 5V peripheral using SN74HC245NSR. In this scenario, we want to protect the microcontroller from the higher voltage of the peripheral.

1. Connect VCC (Pin 20):

- Connect VCC to a 5V power source (e.g., +5V).

2. Connect GND (Pin 10):

- Connect GND to the ground (0V) reference.

3. Direction Control (DIR - Pin 1):

- Connect DIR to a microcontroller pin that controls the direction (input or output).

- Use a pull-up or pull-down resistor to ensure a defined direction when the microcontroller is in reset.

4. Output Enable (OE - Pin 19):

- Connect OE to a microcontroller pin to enable/disable the outputs as needed.

- Use a pull-up or pull-down resistor for a defined state.

5. A Bus (A1-A8 - Pins 2-9) and B Bus (B1-B8 - Pins 12-19):

- Connect the A Bus to the microcontroller's data pins.

- Connect the B Bus to the peripheral's data pins.

6. VCCA and VCCB Isolation (Pins 20 and 10):

- These pins should be connected to the respective power supplies to ensure proper voltage translation.

Design Considerations:

- Ensure that VCC and GND are properly connected to power and ground, respectively.

- Pay attention to the voltage levels of the A and B buses and connect them accordingly.

- Configure the DIR and OE pins appropriately in your microcontroller code.

- Consider using decoupling capacitors near the power supply pins for noise reduction.

- Ensure that the microcontroller and peripheral are properly synchronized in terms of data direction and enable signals.

In summary, SN74HC245NSRis a versatile chip for voltage-level translation and bus interfacing. When designing a circuit with this chip, it's crucial to pay attention to power supply connections, data direction control, and proper signal synchronization to ensure reliable operation.

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6. What is the process for return or replacement of SN74HC245NSR?

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 SN74HC245NSR we delivered, we will accept the replacement or return of the SN74HC245NSR 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 SN74HC245NSR.

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

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(1)Inform us within 90 days

(2)Obtain Requesting Return Authorizations