SN74LVTH182502APM

Product Overview

• Category: Integrated Circuit (IC)
• Use: Logic Level Translator
• Characteristics: High-speed, low-voltage, 18-bit universal bus transceiver with 3-state outputs
• Package: 56-pin TSSOP (Thin Shrink Small Outline Package)
• Essence: Logic level translation between different voltage domains
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 1.65V to 3.6V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Maximum Operating Frequency: 400MHz
• Propagation Delay: 2.5ns (Max)
• Output Drive Strength: ±24mA
• ESD Protection: Human Body Model > 2000V

Detailed Pin Configuration

The SN74LVTH182502APM has a total of 56 pins, which are divided into various functional groups:

• VCCA, VCCB: Power supply pins for respective voltage domains
• GND: Ground pin
• OEAB, OEBA: Output enable pins for controlling the direction of data flow
• A1-A18, B1-B18: Data input/output pins for each voltage domain
• DIR: Direction control pin for bidirectional data transfer
• NC: No connection pin

For the detailed pin configuration diagram, please refer to the datasheet provided by the manufacturer.

Functional Features

• Bidirectional voltage level translation: Allows seamless communication between devices operating at different voltage levels.
• Automatic direction control: The DIR pin determines the direction of data flow, eliminating the need for additional control signals.
• 3-state outputs: The OEAB and OEBA pins enable/disable the output buffers, allowing multiple devices to share a common bus.
• High-speed operation: Capable of handling data rates up to 400MHz, making it suitable for high-performance applications.

Advantages and Disadvantages

Advantages: - Wide supply voltage range allows compatibility with various systems. - Fast propagation delay ensures efficient data transfer. - 3-state outputs enable bus sharing and reduce system complexity. - ESD protection safeguards against electrostatic discharge damage.

Disadvantages: - Limited number of input/output pins (18 each) may restrict the size of the system it can be used in. - Requires careful consideration of voltage level compatibility between different devices connected to the bus.

Working Principles

The SN74LVTH182502APM utilizes a combination of CMOS and BiCMOS technologies to achieve logic level translation. It employs a voltage divider network and level-shifting circuitry to convert signals between different voltage domains. The direction of data flow is controlled by the DIR pin, which determines the operation mode of the internal circuitry.

Detailed Application Field Plans

The SN74LVTH182502APM finds applications in various fields, including:

1. Microcontrollers and microprocessors: Facilitates communication between devices operating at different voltage levels, such as connecting a low-voltage microcontroller to a higher-voltage peripheral.
2. Communication systems: Enables interfacing between different voltage domain components, such as connecting a low-voltage FPGA to a high-voltage memory module.
3. Industrial automation: Allows integration of sensors and actuators operating at different voltage levels into a control system.
4. Automotive electronics: Supports voltage level translation between different subsystems within a vehicle, ensuring seamless communication.

Detailed and Complete Alternative Models

1. TXS0108E: 8-bit bidirectional voltage-level translator with automatic direction control.
2. PCA9306: Dual bidirectional I2C-bus and SMBus voltage-level translator.
3. SN74LVC1T45: Single-bit dual-supply bus transceiver with configurable voltage translation.

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

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