SN74LVTH18652APM

Product Overview

• Category: Integrated Circuit (IC)
• Use: Logic Level Translator
• Characteristics: Low Voltage, High-Speed, 18-Bit Bus Transceiver
• Package: 56-pin TSSOP (Thin Shrink Small Outline Package)
• Essence: Translates signals between different voltage levels in digital systems
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Supply Voltage Range: 2.7V to 3.6V
• Logic Voltage Levels: 1.65V to 3.6V
• Input/Output Compatibility: 5V TTL/CMOS
• Maximum Data Rate: 400Mbps
• Propagation Delay: 2.8ns (Max)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The SN74LVTH18652APM has a total of 56 pins, which are divided into various functional groups:

• VCC: Power supply pins (+3.3V)
• GND: Ground pins
• OEAB, OEBA: Output Enable pins for A-to-B and B-to-A direction control
• DIR: Direction control pin
• A1-A9, B1-B9: Data input/output pins
• LA, LB: Latch enable pins for transparent mode operation
• CLKAB, CLKBA: Clock input pins for synchronous operation
• SAB, SBA: Select pins for multiplexed bus configuration
• NC: No Connection pins

Functional Features

• Bidirectional Voltage Translation: Allows seamless communication between devices operating at different voltage levels.
• Automatic Direction Control: The DIR pin determines the direction of data flow, simplifying system design.
• Transparent Mode Operation: When the latch enable pins (LA and LB) are low, the device operates in transparent mode, where data is directly transferred from input to output.
• Synchronous Operation: The CLKAB and CLKBA pins enable synchronous operation, ensuring accurate data transfer.
• ESD Protection: Provides robust protection against electrostatic discharge, enhancing reliability.

Advantages and Disadvantages

Advantages: - Wide supply voltage range allows compatibility with various systems. - High-speed operation enables efficient data transfer. - Bidirectional functionality reduces the need for additional level-shifting components. - ESD protection enhances device durability.

Disadvantages: - Limited to 18-bit bus width, may not be suitable for applications requiring larger data buses. - Requires careful consideration of voltage levels to prevent signal distortion or damage.

Working Principles

The SN74LVTH18652APM utilizes a combination of CMOS and TTL logic to achieve bidirectional voltage translation. It employs a voltage-level shifting technique that ensures proper signal transfer between devices operating at different voltage levels. The DIR pin controls the direction of data flow, while the latch enable pins (LA and LB) and clock inputs (CLKAB and CLKBA) enable transparent and synchronous modes of operation, respectively.

Detailed Application Field Plans

The SN74LVTH18652APM finds application in various digital systems where voltage translation is required. Some potential application fields include:

1. Microcontroller Interfacing: Facilitates communication between microcontrollers operating at different voltage levels.
2. Memory Modules: Enables data transfer between memory modules with varying voltage requirements.
3. Communication Interfaces: Allows seamless integration of devices using different logic families, such as TTL and CMOS.
4. Industrial Automation: Supports voltage translation in control systems, PLCs, and sensor networks.
5. Consumer Electronics: Used in devices like smartphones, tablets, and gaming consoles to interface components operating at different voltages.

Detailed and Complete Alternative Models

1. SN74LVC4245A: 8-bit bidirectional voltage-level translator with automatic direction control.
2. SN74AVC4T245: 4-bit dual-supply bus transceiver with configurable voltage translation.
3. TXB0108: 8-bit bidirectional voltage-level translator with automatic direction sensing.

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

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