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SN74HCT245DW

Name: SN74HCT245DW
Rating: 4.7 (12 reviews)

IC TXRX NON-INVERT 5.5V 20-SOIC

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資料表 SN74HCT245DW DataSheet
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規格

Series	74HCT
Part Status	Obsolete
Logic Type	Transceiver, Non-Inverting
Number of Elements	1
Number of Bits per Element	8
Output Type	3-State
Current - Output High, Low	6mA, 6mA
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	20-SOIC (0.295", 7.50mm Width)
Supplier Device Package	20-SOIC
Base Product Number	74HCT245

概述

Description

The SN74HCT245DW is an octal bus transceiver designed for asynchronous data transmission between two devices. It belongs to the Texas Instruments HCT (high-speed CMOS with TTL compatibility) family, which makes it suitable for interfacing with both CMOS and TTL logic levels.
This device features eight data input/output lines, enabling it to operate in both transmit and receive modes. It supports a tri-state output, allowing multiple devices to share the same bus without interference. The transceiver operates with a wide voltage range (4.5V to 5.5V) and exhibits low power consumption, making it ideal for battery-powered applications.
Key features include:
- High-speed operation (up to 25 MHz)
- TTL input compatible
- Low on-state resistance
- Enhanced noise immunity
Typical applications include communication between microcontrollers, memory devices, and other peripheral circuits in digital systems. The SN74HCT245DW is packaged in a 20-pin TSSOP, ensuring compact integration into various electronic designs.

Features

The SN74HCT245DW is an octal bus transceiver designed for high-speed data transfer between devices. Key features include:
1. 8-Bit Data Handling: It can transmit and receive 8 bits of data simultaneously.
2. High-Speed Operation: Operates at speeds up to 25 MHz.
3. Voltage Compatibility: Designed for use in 5V systems while being compatible with TTL logic levels.
4. Three-State Outputs: Enables high-impedance states, allowing multiple devices to connect to a common bus without interference.
5. Direction Control: Features a DIR pin that controls the data flow direction, allowing for easy bidirectional communication.
6. Wide Supply Voltage Range: Operates from a supply voltage of 4.5V to 5.5V.
7. Low Power Consumption: Offers low static power dissipation, making it energy-efficient.
8. Package Type: Available in a surface-mount SOIC-20 package.
These features make the SN74HCT245DW suitable for applications in data bus systems, interconnecting microcontrollers, and peripheral devices.

Package

The SN74HCT245DW is available in a TSSOP (Thin Shrink Small Outline Package) package type, which typically has 20 pins. This surface-mount package is designed for efficient space utilization and thermal performance in electronic circuits.

Pinout

The SN74HCT245DW is an octal bus transceiver with 3-state outputs, designed for high-speed operation and compatible with TTL logic levels. It features a total of 20 pins.
Pin Functions:
- 1-8 (A1-A8): Inputs for data transfer from the A bus.
- 9 (DIR): Direction control pin; determines whether data flows from A to B or vice versa.
- 10 (GND): Ground connection.
- 11 (OE): Output enable pin; when low, the transceivers' outputs are enabled (active).
- 12-19 (B1-B8): Outputs for data transfer to the B bus.
- 20 (VCC): Power supply connection (typically +5V).
The transceiver operates in the HCT logic family, allowing for compatibility with both TTL and CMOS devices. It is commonly used in bus-oriented applications for data transmission.

Manufacturer

The SN74HCT245DW is manufactured by Texas Instruments (TI), a leading semiconductor company based in the United States. Founded in 1930, Texas Instruments specializes in designing and manufacturing a wide range of electronic components, including analog and digital signal processing devices, embedded processors, and microcontrollers. The company is well-known for its innovations in the semiconductor industry and serves various sectors, such as automotive, industrial, consumer electronics, and communications. TI is recognized for its commitment to quality and performance in its product offerings, including logic devices like the SN74HCT245DW, which is a high-speed buffer/driver designed for data transmission applications.

Application

The SN74HCT245DW is an octal buffer/driver used in various applications, including data communication, signal buffering, and level shifting between different logic families. It is commonly employed in computer systems, interface circuits, and peripheral device connections, enhancing signal integrity and driving capabilities for parallel data transmission. Its high-speed performance and ability to handle multiple channels make it suitable for use in automotive, industrial automation, and consumer electronics.

Equivalent

Equivalent products to the SN74HCT245DW include the 74HC245, 74HCT245, 74LS245, and 74LVC245A. These chips serve similar functions as octal bus transceivers with high-speed CMOS technology, but may have variations in voltage levels, drive capability, and propagation delays. Always check the specific datasheets for detailed specifications and compatibility.