SN74LVT240APW

Product Overview

• Category: Integrated Circuit (IC)
• Use: Logic Level Translator
• Characteristics: Low Voltage, Bi-directional, Octal Bus Transceiver
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: Translates signals between different voltage levels in electronic circuits
• Packaging/Quantity: Tape and Reel, 2,500 units per reel

Specifications

• Supply Voltage Range: 1.65V to 3.6V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• High-Level Input Voltage: 0.7 x VCC to VCC + 0.5V
• Low-Level Input Voltage: -0.5V to 0.3 x VCC
• High-Level Output Voltage: 0.9 x VCC to VCC
• Low-Level Output Voltage: 0V to 0.1 x VCC
• Maximum Operating Frequency: 200MHz

Detailed Pin Configuration

The SN74LVT240APW has a total of 20 pins, which are divided into two groups:

Group A (Input/Output Pins)

1. OE (Output Enable)
2. A1-A8 (Data Inputs/Outputs)
3. GND (Ground)
4. B1-B8 (Data Inputs/Outputs)
5. VCC (Supply Voltage)

Group B (Control Pins)

1. DIR (Direction Control)
2. GND (Ground)
3. B8-B1 (Data Inputs/Outputs)
4. GND (Ground)
5. A8-A1 (Data Inputs/Outputs)

Functional Features

• Bi-directional translation of signals between two voltage domains
• Allows communication between devices operating at different voltage levels
• Provides voltage level shifting to ensure compatibility between different logic families
• Enables bidirectional data flow with automatic direction control

Advantages and Disadvantages

Advantages

• Wide supply voltage range allows compatibility with various systems
• Fast switching speed and low propagation delay
• Low power consumption
• Compact package size for space-constrained applications
• High noise immunity and ESD protection

Disadvantages

• Limited number of input/output pins (8 in each direction)
• May require additional components for voltage level translation in complex systems
• Not suitable for high-speed applications exceeding 200MHz

Working Principles

The SN74LVT240APW is a logic level translator that operates by using a combination of MOSFETs and CMOS technology. It consists of two sets of eight bidirectional buffers, which allow the translation of signals between two voltage domains. The DIR pin controls the direction of data flow, enabling bi-directional communication.

When the DIR pin is set to a logic high, data flows from the A-side to the B-side. Conversely, when the DIR pin is set to a logic low, data flows from the B-side to the A-side. The OE pin can be used to enable or disable the outputs, providing flexibility in controlling the device's functionality.

Detailed Application Field Plans

The SN74LVT240APW is commonly used in various electronic systems where voltage level translation is required. Some typical application fields include:

1. Microcontrollers and microprocessors interfacing with peripherals operating at different voltage levels.
2. Communication systems involving multiple devices with varying voltage requirements.
3. Industrial automation and control systems where different logic families need to communicate.
4. Battery-powered portable devices requiring efficient voltage level shifting.
5. Automotive electronics for signal translation between different subsystems.

Detailed and Complete Alternative Models

1. SN74LVC240APW: Similar to SN74LVT240APW, but operates at a lower voltage range (1.65V to 3.3V).
2. SN74LVTH240APW: Provides higher speed operation with a maximum operating frequency of 333MHz.
3. SN74AVC4T245PW: Four-channel bidirectional level translator with a wider supply voltage range (1.2V to 3.6V).

These alternative models offer similar functionality and can be used as replacements depending on specific system requirements.

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