사양
| 속성 | 가치 |
| Package | Tape & Reel (TR),Cut Tape (CT) |
| Series | 74HCT |
| ProductStatus | Active |
| LogicType | Transceiver, Non-Inverting |
| NumberofElements | 1 |
| NumberofBitsperElement | 8 |
| OutputType | 3-State |
| Current-OutputHighLow | 6mA, 6mA |
| Voltage-Supply | 4.5V ~ 5.5V |
| OperatingTemperature | -40°C ~ 85°C (TA) |
| MountingType | Surface Mount |
| Package/Case | 20-SOIC (0.209, 5.30mm Width) |
개요
Description
The SN74HCT245NSR is an integrated circuit from Texas Instruments, functioning as an octal bus transceiver with three-state outputs. It is part of the 74HCT series, designed to offer high-speed operation with low power consumption. This device is typically used in applications requiring bidirectional data flow between buses, capable of driving bus lines or buffer memory address registers.
Key features include:
- Voltage Compatibility: Operates with a power supply range of 4.5V to 5.5V, compatible with TTL logic levels.
- Propagation Delay: Offers fast data transfer with low propagation delay.
- Output Control: Features output enable (OE) and direction control (DIR) inputs to manage data direction and high-impedance states effectively.
- Current Drive: Provides high current drive capability, suitable for interfacing with wide data buses.
Applications for the SN74HCT245NSR include computers, networking systems, and other digital systems requiring reliable data transfer across multiple channels. Its compact design and efficient operation make it a popular choice for modern electronic designs.
Key features include:
- Voltage Compatibility: Operates with a power supply range of 4.5V to 5.5V, compatible with TTL logic levels.
- Propagation Delay: Offers fast data transfer with low propagation delay.
- Output Control: Features output enable (OE) and direction control (DIR) inputs to manage data direction and high-impedance states effectively.
- Current Drive: Provides high current drive capability, suitable for interfacing with wide data buses.
Applications for the SN74HCT245NSR include computers, networking systems, and other digital systems requiring reliable data transfer across multiple channels. Its compact design and efficient operation make it a popular choice for modern electronic designs.
Equivalent
The SN74HCT245NSR is a high-speed CMOS octal bus transceiver. Equivalent products include:
- 74HCT245 from Nexperia
- CD74HCT245 from Texas Instruments
- TC74HCT245A from Toshiba
- MC74HCT245 from ON Semiconductor
These are all logic level, octal bus transceivers compatible with TTL input levels. Always ensure pin compatibility and electrical characteristics match your application requirements when considering alternatives.
- 74HCT245 from Nexperia
- CD74HCT245 from Texas Instruments
- TC74HCT245A from Toshiba
- MC74HCT245 from ON Semiconductor
These are all logic level, octal bus transceivers compatible with TTL input levels. Always ensure pin compatibility and electrical characteristics match your application requirements when considering alternatives.
Features
The SN74HCT245NSR is an octal bus transceiver with 3-state outputs, designed for asynchronous two-way communication between data buses. Key features include:
1. High-Speed Operation: Provides efficient data transfer between two buses.
2. 3-State Outputs: Allows for connection to multiple bus lines without interference.
3. TTL Compatibility: Inputs are compatible with TTL voltage levels, making it suitable for mixed-signal environments.
4. Low Power Consumption: Operates with minimal power, enhancing battery life in portable applications.
5. Wide Voltage Range: Functions over a voltage range from 4.5V to 5.5V.
6. Latch-Up Performance: Offers high immunity to latch-up, reducing the risk of circuit damage.
7. Input and Output Protection: Built-in protection against electrostatic discharge (ESD).
8. Compact Package: Available in a small surface-mount package, which is ideal for space-constrained applications.
These features make the SN74HCT245NSR suitable for a variety of digital applications requiring efficient bidirectional data communication.
1. High-Speed Operation: Provides efficient data transfer between two buses.
2. 3-State Outputs: Allows for connection to multiple bus lines without interference.
3. TTL Compatibility: Inputs are compatible with TTL voltage levels, making it suitable for mixed-signal environments.
4. Low Power Consumption: Operates with minimal power, enhancing battery life in portable applications.
5. Wide Voltage Range: Functions over a voltage range from 4.5V to 5.5V.
6. Latch-Up Performance: Offers high immunity to latch-up, reducing the risk of circuit damage.
7. Input and Output Protection: Built-in protection against electrostatic discharge (ESD).
8. Compact Package: Available in a small surface-mount package, which is ideal for space-constrained applications.
These features make the SN74HCT245NSR suitable for a variety of digital applications requiring efficient bidirectional data communication.
Pinout
The SN74HCT245NSR is an octal bus transceiver with 3-state outputs. It has 20 pins and functions primarily for asynchronous communication between data buses. The device can operate in both send and receive modes.
Key functions and pin assignments include:
- Pins 2-9 (A1-A8): These are the A-side data inputs/outputs.
- Pins 11-18 (B1-B8): These are the B-side data outputs/inputs.
- Pin 1 (DIR): This controls the direction of data flow. When DIR is high, data is transmitted from A to B. When DIR is low, data flows from B to A.
- Pin 19 (OE): This is the output enable pin. When OE is low, the device is enabled, allowing data flow. When OE is high, all outputs are in the high-impedance state.
- Pin 10 (GND): Ground reference.
- Pin 20 (VCC): Supply voltage.
This transceiver is useful for interfacing between TTL and CMOS logic levels and is commonly used in bus-oriented systems.
Key functions and pin assignments include:
- Pins 2-9 (A1-A8): These are the A-side data inputs/outputs.
- Pins 11-18 (B1-B8): These are the B-side data outputs/inputs.
- Pin 1 (DIR): This controls the direction of data flow. When DIR is high, data is transmitted from A to B. When DIR is low, data flows from B to A.
- Pin 19 (OE): This is the output enable pin. When OE is low, the device is enabled, allowing data flow. When OE is high, all outputs are in the high-impedance state.
- Pin 10 (GND): Ground reference.
- Pin 20 (VCC): Supply voltage.
This transceiver is useful for interfacing between TTL and CMOS logic levels and is commonly used in bus-oriented systems.
Manufacturer
The SN74HCT245NSR is manufactured by Texas Instruments. Texas Instruments (TI) is an American technology company that designs and manufactures semiconductors and various integrated circuits, which it sells to electronics designers and manufacturers globally. It is one of the largest semiconductor companies in the world and is well-known for its innovation and development in the field of electronic components. TI focuses on developing analog chips and embedded processors, which are used in a wide range of electronic devices from consumer electronics to industrial applications.
Application
The SN74HCT245NSR is a bidirectional bus transceiver used in various applications, including data communication, microprocessor interfacing, and memory module integration. It facilitates the transfer of data between different voltage levels, making it ideal for level shifting between 3.3V and 5V systems. Common application areas include computer peripherals, embedded systems, and digital signal processing where efficient data transfer is essential. Additionally, its high-speed operation and low power consumption make it suitable for use in portable and battery-powered devices. The device's ability to control data flow direction and tri-state outputs allows for versatile integration into complex digital circuits.
Package
The SN74HCT245NSR is a digital IC from Texas Instruments, and it is typically housed in a SOIC (Small Outline Integrated Circuit) package. This package is surface mounted with 20 pins, commonly referred to as SOIC-20.
