SN74LVC245ADBR TI Logic Controller, Logic IC: A Well-Rounded and Functional Guide

Texas Instruments SN74LVC245ADBR +BOM

The Texas Instruments SN74LVC245ADBR is an octal bus transceiver. It operates over a supply voltage range of 1.65V - 3.6V and can handle up to 5.5V input, enabling seamless integration in mixed - voltage systems. With a low propagation delay of 6.3ns at 3.3V, it ensures fast data transfer. It features low noise, an Ioff function for hot - swapping, and robust ESD protection, making it ideal for reliable data communication in various applications.

Texas Instruments SN74LVC245ADBR's Features

1. Wide Supply Voltage Range: It can operate within a supply voltage range of 1.65V to 3.6V. This flexibility allows it to be used in various power environments and different circuit designs that require different voltage levels.
2. High Input Tolerance: The device can accept input voltages up to 5.5V. This feature is useful for interfacing with components that operate at higher voltage levels, enabling seamless communication between different parts of a system that may have different voltage requirements. It supports mixed-mode signal operation, allowing for easy integration with both high and low voltage components.
3. High Speed Data Transmission: It has a relatively low propagation delay. For example, at a 3.3V supply, the maximum propagation delay tpd is only 6.3ns. This high-speed performance makes it suitable for applications where rapid data transfer is essential, such as in high-speed data buses and communication interfaces.
4. Low Noise Characteristics: It has good electrical performance in terms of low output ground bounce (V_OLP). For instance, under typical conditions at V_CC=3.3V and T_A=25^∘C, V_OLP is less than 0.8V. Additionally, it has a good output high (V_OH) undershoot (V_OHV) characteristic. Under the same conditions, the typical V_OHV is greater than 2V. These characteristics help in reducing signal noise during data transmission, ensuring stable and accurate data communication.
5. Ioff Function: It has an I_off function which enables it to support hot swapping and partial power-down modes. The I_off circuit disables the outputs when the device is powered down, preventing unwanted current flow back into the system. This feature enhances the device's reliability and safety in applications where power management and protection against electrical hazards are important.
6. Latching and ESD Protection: It has a latch-up performance exceeding 250mA as per the JESD 17 standard. It also provides electrostatic discharge (ESD) protection that exceeds the JESD 22 standard. For example, it can withstand a human body model (HBM) ESD of 2000V and a charged device model (CDM) ESD of 1000V. These protection features make the device more robust and less prone to damage from electrical surges and electrostatic discharges, increasing its lifespan and reliability in various operating conditions.
7. High Drive Capability: It has sufficient drive strength to source and sink enough current, allowing it to effectively drive multiple loads connected to its output pins. This is important for driving components such as other integrated circuits or peripheral devices in a system, ensuring that the signals are transmitted with sufficient power and quality.
8. Compatibility: It is designed to be compatible with a wide range of logic families, making it easy to integrate into existing circuit designs and systems. This compatibility simplifies the design process and reduces the need for additional level conversion or interface components in many cases.

Texas Instruments SN74LVC245ADBR's Applications

In the field of communication devices:
Cable Modem Terminal Systems: In cable modem terminal systems, high-speed data transmission and communication between devices with different voltage levels are required. The SN74LVC245ADBR can operate with a power supply ranging from 1.65V to 3.6V and can accept an input voltage of up to 5.5V. It supports mixed-mode signal operation, meeting the demand for level conversion between different chips or modules in the system, ensuring stable and fast data transmission between different devices, and guaranteeing smooth network communication.
Telecommunication Infrastructure: Telecommunication equipment usually contains components with various different voltage standards and has extremely high requirements for the reliability and speed of data transmission. The high-speed transmission characteristics of this device (with a maximum propagation delay t_pd of 6.3ns when powered at 3.3V), as well as its good electrical performance (such as low output ground bounce V_OLP and high output V_OH undershoot V_OHV), can effectively reduce signal interference and ensure accurate data transmission, playing a key role in the signal processing and transmission links of telecommunication infrastructure.
In the field of computer and network devices:
Servers: There is a large amount of data interaction inside servers, and efficient bus interfaces are needed to connect different components. The high driving capability and fast signal transmission speed of the SN74LVC245ADBR enable it to meet the requirements of high-speed data buses in servers, realizing rapid data exchange between memory, processors, and other peripherals, and improving the overall performance of the server.
Network Switches: Network switches require data to be forwarded quickly and accurately between different ports. The low propagation delay and stable electrical characteristics of this device ensure the efficiency and accuracy of data packet transmission on the internal bus of the switch, avoiding data loss or errors, and ensuring the stable operation of network switching.
In the field of display and control devices:
LED Displays: In LED display systems, control signals and data need to be accurately transmitted to the LED driver chip. The SN74LVC245ADBR can achieve communication between devices with different voltage levels, reliably transmitting signals from microcontrollers or other control chips to the LED driver. At the same time, its protection functions can effectively deal with electrical interference in the system, ensuring the stable operation of the LED display and clear image display.
Motor Drives: When motor drives are in operation, they need to receive control signals and drive the motor to operate. The SN74LVC245ADBR can be used to isolate and drive control signals. Its high driving capability can meet the requirements of motor drives for signal strength. At the same time, in an environment where electrical noise is generated during motor operation, the anti-interference and protection characteristics of this device can ensure the accurate transmission of control signals and achieve precise control of the motor.
In other application fields:
In the application scenario of I/O expanders, it is necessary to expand the number of input/output ports of the microcontroller and ensure reliable signal transmission. The SN74LVC245ADBR can communicate between I/O devices with different voltages and the microcontroller. Its flexible voltage adaptability and stable electrical performance ensure that the expanded I/O ports can work properly, meeting the system's demand for I/O resource expansion.

Texas Instruments SN74LVC245ADBR's Attributes

Texas Instruments SN74LVC245ADBR's Datasheet

Texas Instruments SN74LVC245ADBR's Symbol,Footprint and 3D Model

The Texas Instruments SN74LVC245ADBR is a 20 - pin device in an SSOP - 20 package1. The pinout is as follows:

1. Pins 1 - 8 (A1 - A8): These are the input pins for bus A. They receive data from a source device.
2. Pins 10 - 17 (B1 - B8): These are the output pins for bus B. They send data to a destination device.
3. Pin 9 (DIR): This is the direction - control pin. When DIR is high, data flows from bus A to bus B. When DIR is low, data flows from bus B to bus A.
4. Pin 18 (OE): This is the output - enable pin. When OE is low, the outputs are enabled, allowing data to be transferred. When OE is high, the outputs are in a high - impedance state.
5. Pin 19 (VCC): This is the power - supply pin, which is connected to the positive supply voltage (ranging from 1.65V to 3.6V).
6. Pin 20 (GND): This is the ground pin, which provides the electrical reference for the device.

Texas Instruments SN74LVC245ADBR's Category-Logic Controller, Logic IC

Logic IC, that is, logic integrated circuit, is a semiconductor device that integrates multiple logic gate circuits. Internally, it is based on transistors. Through different arrangements and combinations, logic gates such as AND gates, OR gates, and NOT gates are formed, and signal transmission is achieved with the help of multi-layer metal interconnections. Relying on Boolean logic operations, Logic ICs can perform complex calculation and control functions, and are the core of modern electronic technology. There is a rich variety of Logic IC types. Standard logic gate circuits are used to implement basic Boolean operations; composite logic gates are composed of multiple standard gates and can complete more complex logic functions; TTL (Transistor-Transistor Logic) has a fast speed but relatively high power consumption, while CMOS (Complementary Metal-Oxide-Semiconductor) is known for its low power consumption and is the mainstream technology nowadays; programmable logic devices can be programmed to customize logic functions according to user needs; application-specific integrated circuits are designed for specific applications, with optimized performance and lower costs during mass production. Logic ICs are extremely widely applied. In computers, they are the foundation of core components such as CPUs and GPUs. In communication devices, they undertake key tasks such as data packet processing and routing. In consumer electronics like smartphones and smart TVs, they support basic operations and advanced functions. In the field of industrial automation, they are used for precise control and data processing. In automotive electronics, they assist in engine management, safety systems, and so on.
Texas Instruments' SN74LVC245ADBR is an outstanding Logic IC. As an octal bus transceiver, it can operate with a power supply ranging from 1.65V to 3.6V and can withstand an input voltage of up to 5.5V, adapting to various voltage environments. With characteristics such as high-speed transmission, low noise, the Ioff function, and good ESD (Electrostatic Discharge) and latch-up protection, it performs excellently in data transmission scenarios and provides stable guarantees for data interaction between various devices.

SN74LVC245ADBR's Manufacturer-Texas Instruments

Texas Instruments has achieved remarkable feats in the Logic IC field. In 1958, engineer Jack Kilby invented the first commercial integrated circuit, integrating multiple electronic components onto a single semiconductor substrate. This innovation inaugurated a new era of miniaturization and enhanced functionality for integrated circuits. Subsequently, TI has continuously innovated. In 1963, it introduced silicon gate technology, which significantly reduced power consumption and improved performance, laying a solid foundation for the subsequent development of integrated circuits. TI offers a diverse range of Logic IC products, such as digital signal processors (DSPs). Its products are widely used in numerous fields, including communication, computing, and automotive, facilitating technological innovation and development across various industries. The newly launched programmable logic device series in 2024 is highly integrated and can reduce system complexity, once again demonstrating its leading position in the Logic IC field.

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