74LVTH245SJX

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Level Shifter/Transceiver
• Characteristics: High-speed, low-voltage, and low-power consumption
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Bi-directional voltage level translator/transceiver
• Packaging/Quantity: Available in reels of 2500 pieces

Specifications

• Supply Voltage Range: 1.2V to 3.6V
• Logic Family: LVTH
• Number of Channels: 8
• Input/Output Type: Tri-state
• Output Drive Capability: ±24mA
• Propagation Delay: 4.5ns (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The 74LVTH245SJX IC has a total of 20 pins arranged as follows:

┌───┬───┐ OE ─┤1 └─ 20┬─ VCC A1 ─┤2 19├─ B1 A2 ─┤3 18├─ B2 A3 ─┤4 17├─ B3 A4 ─┤5 16├─ B4 A5 ─┤6 15├─ B5 A6 ─┤7 14├─ B6 A7 ─┤8 13├─ B7 GND ─┤9 12├─ B8 DIR ─┤10 11├─ OE# └───────┘

Functional Features

• Bi-directional voltage level translation between two different voltage domains.
• Tri-state outputs allow multiple devices to share a common bus.
• High-speed operation enables efficient data transfer.
• Low-voltage operation makes it suitable for battery-powered applications.
• ESD protection on all inputs and outputs enhances reliability.

Advantages

• Wide supply voltage range allows compatibility with various systems.
• Fast propagation delay ensures quick signal transmission.
• Low power consumption helps conserve energy in portable devices.
• Tri-state outputs enable bus sharing, reducing the number of required pins.
• ESD protection safeguards against electrostatic discharge damage.

Disadvantages

• Limited output drive capability may restrict use in high-current applications.
• Not suitable for voltage translation between significantly different voltage levels.
• Sensitive to excessive voltage or current, requiring proper handling and protection.

Working Principles

The 74LVTH245SJX is designed to translate digital signals between two voltage domains. It utilizes a combination of CMOS and TTL technologies to achieve high-speed operation while maintaining low power consumption. The direction of data flow is controlled by the DIR pin, allowing bidirectional communication. When the OE# (Output Enable) pin is active, the outputs are enabled, and data can be transmitted. Tri-state outputs facilitate bus sharing by allowing multiple devices to connect to the same bus without interfering with each other.

Detailed Application Field Plans

The 74LVTH245SJX is commonly used in various applications, including: 1. Microcontroller interfacing with different voltage peripherals. 2. Level shifting in communication interfaces such as UART, SPI, and I2C. 3. Signal translation between different logic families (e.g., 3.3V and 5V). 4. Bus buffering and isolation in multi-device systems. 5. Voltage level conversion in battery-powered devices.

Detailed and Complete Alternative Models

Some alternative models that can be considered for similar applications are: - 74LVC245: Similar functionality with lower power consumption. - SN74LV245A: Compatible with wider voltage range and higher output drive capability. - 74HCT245: Suitable for translating between TTL and CMOS logic levels. - TXB0108: Bi-directional level shifter with automatic direction sensing.

These alternatives provide flexibility in choosing the most suitable IC based on specific requirements and constraints.

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