SN74LVT245BDBR

Product Overview

Category: Integrated Circuit (IC)
Use: Level Shifter and Bus Transceiver
Characteristics:
- Low Voltage TTL (LVT) Technology
- Bidirectional Voltage Translation
- 8-bit Wide Data Bus
- 3-state Outputs
Package: SSOP-20
Essence: The SN74LVT245BDBR is a high-performance, octal bus transceiver designed for voltage level shifting between different logic levels. It allows bidirectional data transfer between a 3.3V and 5V system, making it ideal for interfacing between microcontrollers, memory devices, and other peripherals.
Packaging/Quantity: The SN74LVT245BDBR is available in a SSOP-20 package and is typically sold in reels of 2500 units.

Specifications

Supply Voltage Range: 2.7V to 3.6V
Input Voltage Range (V_I): 0V to V_CC
Output Voltage Range (V_O): 0V to V_CC
Operating Temperature Range: -40°C to +85°C
Propagation Delay (t_PD): 4.1 ns (Max)
Output Capacitance (C_O): 6 pF (Typ)

Pin Configuration

The SN74LVT245BDBR has a total of 20 pins arranged as follows:

___________ A1 |1 20| V_CC A2 |2 19| B1 A3 |3 18| B2 A4 |4 17| B3 A5 |5 16| B4 A6 |6 15| B5 A7 |7 14| B6 A8 |8 13| B7 GND |9 12| B8 OE |10 11| DIR -----------

Functional Features

Bidirectional voltage translation between 3.3V and 5V systems.
Allows for seamless interfacing between microcontrollers, memory devices, and other peripherals operating at different logic levels.
3-state outputs enable bus sharing between multiple devices.
Low power consumption and high-speed operation.

Advantages and Disadvantages

Advantages: - Enables easy integration of components operating at different voltage levels. - Supports bidirectional data transfer. - Wide operating temperature range. - Compact SSOP-20 package allows for space-efficient designs.

Disadvantages: - Limited to voltage translation between 3.3V and 5V systems. - Not suitable for applications requiring higher voltage level shifting.

Working Principles

The SN74LVT245BDBR utilizes a combination of MOSFETs and CMOS technology to achieve bidirectional voltage translation. It employs a direction control pin (DIR) to determine the data flow direction and an output enable pin (OE) to enable/disable the outputs. The device operates by monitoring the input voltage levels and translating them to the corresponding output voltage levels based on the logic levels of the system it is interfacing with.

Detailed Application Field Plans

The SN74LVT245BDBR finds application in various fields where voltage level shifting is required. Some common use cases include:

Interfacing between microcontrollers and memory devices operating at different logic levels.
Communication between different modules within a system, such as sensors, displays, and controllers.
Level shifting in industrial automation systems to ensure compatibility between different components.
Interface conversion in automotive electronics, enabling communication between different subsystems.

Detailed and Complete Alternative Models

SN74LVC245A: Similar to the SN74LVT245BDBR, but operates at a wider voltage range of 1.65V to 5.5V.
TXS0108E: An 8-bit bidirectional voltage level translator with automatic direction sensing, supporting voltage translation between various logic levels.
PCA9306: A dual bidirectional I2C-bus and SMBus voltage-level translator with an enable input, suitable for translating between different voltage levels in I2C applications.

These alternative models offer similar functionality to the SN74LVT245BDBR but may have different specifications or package options to suit specific application requirements.

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Перелічіть 10 типових запитань і відповідей, пов’язаних із застосуванням SN74LVT245BDBR у технічних рішеннях

Sure! Here are 10 common questions and answers related to the application of SN74LVT245BDBR:

Q: What is the SN74LVT245BDBR? A: The SN74LVT245BDBR is a bidirectional octal bus transceiver with 3-state outputs, commonly used for level shifting and voltage translation in digital systems.
Q: What is the operating voltage range of SN74LVT245BDBR? A: The operating voltage range of SN74LVT245BDBR is typically between 2.7V and 3.6V.
Q: How many bidirectional channels does SN74LVT245BDBR have? A: SN74LVT245BDBR has 8 bidirectional channels, allowing for simultaneous data transmission in both directions.
Q: What is the maximum data transfer rate supported by SN74LVT245BDBR? A: SN74LVT245BDBR supports a maximum data transfer rate of up to 400 Mbps.
Q: Can SN74LVT245BDBR be used for level shifting between different voltage domains? A: Yes, SN74LVT245BDBR can be used for level shifting between different voltage domains, as long as the voltage levels are within its operating range.
Q: Does SN74LVT245BDBR have built-in protection against bus contention? A: Yes, SN74LVT245BDBR has built-in bus hold circuitry that prevents bus contention when the output is in the high-impedance state.
Q: Can SN74LVT245BDBR be used in mixed-voltage systems? A: Yes, SN74LVT245BDBR can be used in mixed-voltage systems to enable communication between different voltage domains.
Q: What is the power supply current consumption of SN74LVT245BDBR? A: The power supply current consumption of SN74LVT245BDBR varies depending on the operating conditions, but it typically ranges from a few milliamperes to tens of milliamperes.
Q: Does SN74LVT245BDBR have any special features for reducing noise and signal integrity issues? A: Yes, SN74LVT245BDBR incorporates various features like output edge control and undershoot/overshoot protection to minimize noise and improve signal integrity.
Q: Can SN74LVT245BDBR be used in high-speed applications? A: While SN74LVT245BDBR supports relatively high data transfer rates, it may not be suitable for extremely high-speed applications where faster transceivers with lower propagation delays are required.

Please note that these answers are general and may vary based on specific application requirements. It's always recommended to refer to the datasheet and consult the manufacturer for detailed information.