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Name: SN74HC245DWR
Brand: Texas Instruments
SKU: SN74HC245DWR
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 SN74HC245DWR

Part No.:: SN74HC245DWR

Manufacturer:: Texas Instruments

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

Datasheet:: SN74HC245DWR.pdf

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

In Stock:: 3841

Quantity:: Add To Cart

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SN74HC245DWR Specifications

Package/Case:
20-SOIC (0.295, 7.50mm Width)
Packaging:
Tape & Reel (TR),Cut Tape (CT),Digi-Reel®,Bulk
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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SN74HC245DWR information

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SN74HC245DWR Typical application Circuitry

SN74HC245DWR

SN74HC245DWR is a chip with bidirectional voltage-level translation capabilities. It is frequently employed in situations when data needs to be conveyed between circuit components that operate at various voltage levels. This chip is flexible for a range of situations because it can operate on both 3.3V and 5V systems.

Here are some key features and application scenarios for SN74HC245DWR:

1. Features:

- Bidirectional Data Transfer: SN74HC245DWR can transfer data bidirectionally between two buses with different voltage levels.

- Voltage-Level Translation: It supports voltage-level translation from 3.3V to 5V and vice versa.

- 8-Bit Wide Data Bus: It has an 8-bit wide data bus, meaning it can transfer 8 bits of data at a time.

- 3-State Outputs: The chip has 3-state outputs, which allow it to isolate the buses when needed.

- High-Speed Operation: SN74HC245DWR operates at high speeds, making it suitable for applications with tight timing requirements.

2. Application Scenarios:

- Mixed-Voltage Systems: It is commonly used in systems where microcontrollers or other components operate at different voltage levels, ensuring proper communication between them.

- Level Shifting: SN74HC245DWR can be used to shift voltage levels when connecting devices that use different logic levels (e.g., 3.3V and 5V).

Now, let's look at a specific circuit example where SN74HC245DWR is used for level shifting:

Circuit Description:

In this example, we'll use SN74HC245DWR to interface a 3.3V microcontroller (MCU) with a 5V peripheral device, such as a sensor.

1. Connection:

- MCU Side:

- Connect the MCU's data output pins (e.g., Port A) to the "A" side of SN74HC245DWR (pins 1-8).

- Connect the MCU's ground (GND) to the chip's ground (pin 10).

- Connect the MCU's 3.3V power supply to the chip's VCC (pin 20).

- Connect the MCU's direction control pin to the chip's DIR (pin 19).

- Peripheral Device Side:

- Connect the peripheral device's data input pins to the "B" side of SN74HC245DWR (pins 9-16).

- Connect the peripheral device's ground (GND) to the chip's ground (pin 10).

- Connect the peripheral device's 5V power supply to the chip's VCC (pin 20).

2. Direction Control:

- To control the direction of data flow, set the DIR pin (pin 19) of SN74HC245DWR to either a logic high or logic low level.

- Logic high enables data transfer from "A" to "B," and logic low enables transfer from "B" to "A."

3. 3-State Output:

- The OE (Output Enable) pin (pin 1) can be used to enable or disable the output buffer. The outputs are active when OE is low and in a high-impedance state when OE is high.

Taking into account:

- Ensure that the power supply voltage levels for both the MCU (3.3V) and the peripheral device (5V) are stable and within their specified operating ranges.

- Pay attention to signal timing, especially when dealing with high-speed data, to avoid signal integrity issues.

- Verify that the data direction (DIR) control is appropriately set to match the desired data flow direction.

In summary, SN74HC245DWR is a versatile chip for level shifting and voltage-level translation in mixed-voltage systems. When designing circuits with this chip, it's essential to consider voltage compatibility, direction control, and signal timing to ensure proper 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 SN74HC245DWR.

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

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