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SN74LVCR2245APWE4
Product Overview
- Category: Integrated Circuit (IC)
- Use: Voltage Level Translator
- Characteristics: Bi-directional, 8-bit, non-inverting, voltage level translator
- Package: TSSOP-20
- Essence: Facilitates bidirectional voltage translation between different logic levels
- Packaging/Quantity: Tape and reel, 2500 units per reel
Specifications
- Supply Voltage Range: 1.65V to 5.5V
- Logic Voltage Levels: 1.2V to 3.6V
- Input/Output Capacitance: 4pF
- Operating Temperature Range: -40°C to +85°C
- Output Drive Capability: ±24mA
- Propagation Delay: 4.7ns (max) at 3.3V supply, 5.9ns (max) at 1.8V supply
Detailed Pin Configuration
The SN74LVCR2245APWE4 has a total of 20 pins, which are assigned as follows:
- OE (Output Enable) A
- A1 (Data I/O) A
- A2 (Data I/O) A
- A3 (Data I/O) A
- A4 (Data I/O) A
- A5 (Data I/O) A
- GND (Ground)
- B5 (Data I/O) B
- B4 (Data I/O) B
- B3 (Data I/O) B
- B2 (Data I/O) B
- B1 (Data I/O) B
- VCCA (Voltage Supply) A
- VCCB (Voltage Supply) B
- DIR (Direction Control)
- B6 (Data I/O) B
- B7 (Data I/O) B
- B8 (Data I/O) B
- A8 (Data I/O) A
- VREF (Reference Voltage)
Functional Features
- Bi-directional voltage level translation between two logic levels
- Non-inverting translation, maintaining signal integrity
- 8-bit wide data path for efficient data transfer
- Output enable control for easy interfacing with other devices
- Wide supply voltage range allows compatibility with various systems
Advantages and Disadvantages
Advantages: - Enables seamless communication between different logic levels - High-speed operation with low propagation delay - Supports bidirectional data flow - Compact TSSOP package for space-constrained applications
Disadvantages: - Limited to 8-bit data width - Requires external reference voltage for accurate translation
Working Principles
The SN74LVCR2245APWE4 is designed to translate signals between two different voltage levels, typically used in mixed-voltage systems. It utilizes a direction control pin (DIR) to determine the direction of data flow. When DIR is set to logic high, data is translated from side A to side B, and when DIR is set to logic low, data is translated from side B to side A.
The device operates by using a combination of CMOS and TTL circuitry to achieve efficient voltage level translation. It features non-inverting buffers that maintain signal integrity during translation, ensuring reliable data transfer between different logic levels.
Detailed Application Field Plans
The SN74LVCR2245APWE4 finds applications in various fields, including:
- Microcontroller interfacing: It enables communication between microcontrollers operating at different voltage levels.
- Data communication systems: It facilitates voltage level translation in serial communication interfaces like UART, SPI, and I2C.
- Mixed-voltage PCB designs: It allows integration of components with different logic voltage requirements on a single PCB.
- Industrial automation: It enables communication between devices operating at different voltage levels in industrial control systems.
Detailed and Complete Alternative Models
- SN74LVC4245APW: Similar to SN74LVCR2245APWE4, but without the direction control pin (DIR).
- SN74AVC4T245PW: 4-bit voltage level translator with automatic direction sensing.
- SN74HCT125PW: Quad buffer/line driver with 3-state outputs, suitable for voltage level translation.
These alternative models offer similar functionality and can be considered based on specific application requirements.
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Liệt kê 10 câu hỏi và câu trả lời thường gặp liên quan đến ứng dụng SN74LVCR2245APWE4 trong giải pháp kỹ thuật
Sure! Here are 10 common questions and answers related to the application of SN74LVCR2245APWE4 in technical solutions:
Q: What is SN74LVCR2245APWE4? A: SN74LVCR2245APWE4 is a bidirectional voltage-level translator and transceiver IC (integrated circuit) manufactured by Texas Instruments.
Q: What is the purpose of SN74LVCR2245APWE4? A: SN74LVCR2245APWE4 is used for voltage level translation between different logic levels, making it suitable for interfacing between devices operating at different voltage levels.
Q: What voltage levels can SN74LVCR2245APWE4 translate? A: SN74LVCR2245APWE4 can translate between two voltage levels, typically between 3.3V and 5V.
Q: How many channels does SN74LVCR2245APWE4 have? A: SN74LVCR2245APWE4 has 8 bidirectional channels, allowing for simultaneous translation of multiple signals.
Q: What is the maximum data rate supported by SN74LVCR2245APWE4? A: SN74LVCR2245APWE4 supports data rates up to 100 Mbps, making it suitable for various high-speed communication applications.
Q: Can SN74LVCR2245APWE4 be used with both CMOS and TTL logic levels? A: Yes, SN74LVCR2245APWE4 is compatible with both CMOS and TTL logic levels, providing flexibility in system design.
Q: Does SN74LVCR2245APWE4 require external pull-up or pull-down resistors? A: No, SN74LVCR2245APWE4 has built-in pull-up and pull-down resistors, simplifying the design and reducing external component count.
Q: What is the operating voltage range of SN74LVCR2245APWE4? A: SN74LVCR2245APWE4 operates within a voltage range of 1.65V to 5.5V, allowing for compatibility with a wide range of systems.
Q: Can SN74LVCR2245APWE4 be used in both digital and analog applications? A: No, SN74LVCR2245APWE4 is primarily designed for digital signal translation and is not recommended for use in analog applications.
Q: Are there any special considerations when using SN74LVCR2245APWE4 in high-speed applications? A: Yes, it is important to ensure proper signal integrity by following layout guidelines, minimizing trace lengths, and considering termination techniques to minimize reflections and signal degradation.
Please note that these answers are general and may vary depending on specific application requirements. It is always recommended to refer to the datasheet and consult the manufacturer's guidelines for accurate information.