TC74LCX245FT(EL)

Product Overview

• Category: Integrated Circuit (IC)
• Use: Level Shifter and Bus Transceiver
• Characteristics: Low Voltage, High-Speed, Bidirectional
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: Transfers data between different voltage levels in digital systems
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage: 1.65V to 3.6V
• Logic Voltage Levels: 1.8V to 3.3V
• Maximum Data Transfer Rate: 400 Mbps
• Number of Channels: 8
• Input/Output Type: Tri-State
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The TC74LCX245FT(EL) has a total of 20 pins, which are assigned as follows:

• Pins 1 to 8: A1 to A8 (Data Input/Output Channels)
• Pins 9 to 16: B1 to B8 (Data Input/Output Channels)
• Pin 17: OE (Output Enable)
• Pin 18: GND (Ground)
• Pin 19: VCC (Supply Voltage)
• Pin 20: DIR (Direction Control)

Functional Features

• Bidirectional Data Transfer: Allows data to be transmitted in both directions.
• Level Shifting: Converts signals between different voltage levels, enabling compatibility between devices operating at different voltages.
• Tri-State Outputs: Provides the ability to disable the outputs, allowing multiple devices to share a common bus without interfering with each other.

Advantages and Disadvantages

Advantages: - Low Voltage Operation: Can operate at low supply voltages, making it suitable for battery-powered devices. - High-Speed Performance: Supports high-speed data transfer rates, ensuring efficient communication between devices. - Compact Package: The TSSOP package offers a small footprint, saving board space in compact designs.

Disadvantages: - Limited Voltage Range: The TC74LCX245FT(EL) is designed for use with specific voltage levels and may not be suitable for applications requiring a wider voltage range. - Sensitivity to Noise: As with any digital circuit, external noise can affect the performance of the IC. Proper noise filtering and signal integrity measures should be implemented.

Working Principles

The TC74LCX245FT(EL) operates by receiving data from one set of input channels (A1 to A8) and transmitting it to another set of output channels (B1 to B8). The direction of data flow is controlled by the DIR pin. When the DIR pin is set to a logic high level, data flows from the A channels to the B channels. Conversely, when the DIR pin is set to a logic low level, data flows from the B channels to the A channels.

The OE pin is used to enable or disable the outputs. When the OE pin is set to a logic high level, the outputs are enabled, allowing data to be transmitted. When the OE pin is set to a logic low level, the outputs are disabled, effectively isolating the device from the bus.

Detailed Application Field Plans

The TC74LCX245FT(EL) is commonly used in various digital systems where there is a need to interface components operating at different voltage levels. Some typical application fields include:

1. Microcontroller Interfacing: Allows communication between microcontrollers operating at different voltage levels.
2. Sensor Networks: Facilitates data exchange between sensors and microcontrollers with varying voltage requirements.
3. Memory Interfaces: Enables data transfer between memory modules and controllers operating at different voltages.
4. Communication Systems: Used in bus transceivers for level shifting in communication protocols such as I2C, SPI, and UART.

Detailed and Complete Alternative Models

1. SN74LVC245A: Similar bidirectional bus transceiver with a wider voltage range (1.65V to 5.5V).
2. MC74LCX245: Another low-voltage bidirectional transceiver with similar specifications.
3. 74HC245: A popular CMOS-based octal bus transceiver with a wider supply voltage range (2V to 6V).

These alternative models offer similar functionality and can be considered based on specific application requirements.

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