SN74ACT245DB

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SN74ACT245DB

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BUS TRANSCEIVER

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Description

The SN74ACT245DB is an octal bus transceiver, part of Texas Instruments' advanced CMOS (ACT) logic family. It facilitates bidirectional data communication between buses, making it ideal for bus interface applications. The device features eight non-inverting transceivers with 3-state outputs, allowing for controlled direction of data flow through a single direction-control input. This enables the device to transmit data from A to B or B to A, depending on the state of the direction control pin.
Key features include a wide operating voltage range from 4.5V to 5.5V and high-speed operation with typical propagation delays. The device also supports low power consumption due to its low quiescent current. The 3-state outputs allow multiple transceivers to be connected to a common bus without interference. Additionally, the SN74ACT245DB is compatible with TTL logic levels, making it versatile for various digital applications. The device is commonly used in computing and communication systems, where reliable data transfer across different parts of the system is crucial.

Equivalent

The SN74ACT245DB is an octal bus transceiver with 3-state outputs. Equivalent products from other manufacturers include:
1. 74ACT245 from NXP Semiconductors
2. MC74ACT245 from ON Semiconductor
3. CD74ACT245 from Texas Instruments
4. HCT245 from STMicroelectronics
5. 74HC245 from Toshiba
These alternatives offer similar functionality and are suitable for applications requiring high-speed CMOS logic devices with bus transceiver capabilities. Always verify the specifications to ensure compatibility with your application.

Features

The SN74ACT245DB is an octal bus transceiver designed for asynchronous two-way communication between data buses. Key features include:
1. High-Speed Operation: Designed for high-speed applications with typical propagation delay times.
2. Low Power Consumption: Features low power consumption characteristics while maintaining fast operation.
3. 3-State Outputs: Equipped with 3-state outputs, allowing for multiplexed transmission of data.
4. Wide Supply Voltage Range: Operates over a supply voltage range of 4.5V to 5.5V, making it suitable for various logic levels.
5. Bus Drive Capability: Offers strong drive capability with balanced drive outputs and controlled rise and fall times.
6. TTL Compatibility: Compatible with TTL input levels for easy interfacing with TTL logic families.
7. Bidirectional Data Flow: Supports bidirectional data flow with separate control inputs for direction and output enable, facilitating flexibility.
8. High-Impedance State: Can be put into a high-impedance state to prevent bus contention.
9. Compact Package: Available in a compact package, making it suitable for space-constrained applications.
These features make it suitable for a variety of digital logic applications, including memory interfacing, signal buffering, and bus-oriented systems.

Pinout

The SN74ACT245DB is an 8-bit bus transceiver with 3-state outputs. It is designed for asynchronous two-way communication between data buses. The device features the following:
- Pin Count: 20 pins.

- Key Functions:
- Bidirectional Data Flow: Allows data to flow in both directions between the A and B buses.
- 3-State Outputs: Output can be in one of three states: high, low, or high-impedance, enabling multiple units to connect to the same bus line without interference.
- Direction Control (DIR): Determines the direction of data flow. When DIR is high, data flows from A to B, and when low, data flows from B to A.
- Output Enable (OE): Controls the 3-state outputs. When OE is low, outputs are enabled, and when high, outputs are in the high-impedance state, effectively disconnecting them from the bus.
This transceiver is typically used in applications requiring bus communication and data exchange between different parts of a system.

Manufacturer

The SN74ACT245DB is manufactured by Texas Instruments (TI). Texas Instruments is an American technology company that designs and manufactures semiconductors and various integrated circuits, which are used in a wide range of electronic applications. TI is recognized as one of the largest and most established semiconductor companies in the world. The company is known for its focus on innovation and quality in the production of analog chips and embedded processors, serving industries such as automotive, industrial, personal electronics, and communications. Texas Instruments is headquartered in Dallas, Texas, and has a significant global presence with facilities and offices worldwide.

Application

The SN74ACT245DB is a bidirectional bus transceiver used in digital systems for data transmission. Its primary application areas include:
1. Microcontroller and Microprocessor Interface: Facilitates communication between different data buses, ensuring efficient data transfer.
2. Memory Systems: Used in memory address and data bus driving.
3. Data Communication: Assists in bidirectional data transfer in communication systems.
4. Peripheral Interface: Connects peripheral devices to data buses in embedded systems.
5. Level Shifting: Helps in adjusting voltage levels between different parts of a circuit or between integrated circuits.
These applications leverage its high-speed, low-power characteristics and ability to operate in both directions.

Package

The SN74ACT245DB is an octal bus transceiver with 3-state outputs from Texas Instruments. It is available in a SSOP (Shrink Small-Outline Package) with 20 pins, also referred to as the DB package type. This package is designed for surface-mount technology, providing a compact footprint suitable for high-density circuit board applications.

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