Encyclopedia Entry: 74LVT245PW/AUJ

Product Overview

• Category: Integrated Circuit (IC)
• Use: Level Shifting and Bus Transceiver
• Characteristics: High-Speed, Low-Voltage, Bi-Directional, Octal Bus Transceiver
• Package: TSSOP-20
• Essence: The 74LVT245PW/AUJ is a versatile IC that facilitates the bidirectional level shifting between two voltage domains. It is commonly used in digital systems to enable communication between devices operating at different voltage levels.
• Packaging/Quantity: Available in tape and reel packaging with 2500 units per reel.

Specifications

• Supply Voltage Range: 1.2V to 3.6V
• Input Voltage Range (VI): GND to VCC
• Output Voltage Range (VO): GND to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 4.5 ns (max) for 3.3V supply voltage
• Output Drive Capability: ±24 mA

Detailed Pin Configuration

The 74LVT245PW/AUJ has a total of 20 pins, which are assigned specific functions as follows:

| Pin Number | Pin Name | Function | |------------|----------|----------| | 1 | OE | Output Enable Input | | 2-9 | A1-A8 | Data Bus Inputs/Outputs | | 10 | GND | Ground | | 11-18 | B1-B8 | Data Bus Inputs/Outputs | | 19 | VCC | Supply Voltage | | 20 | DIR | Direction Control Input |

Functional Features

• Bidirectional data transfer between two voltage domains.
• High-speed operation with low propagation delay.
• Output enable control for tri-state output capability.
• Direction control input to select the data flow direction.

Advantages

• Enables communication between devices operating at different voltage levels.
• Supports high-speed data transfer.
• Provides bidirectional data flow.
• Tri-state output capability allows multiple devices to share a common bus.

Disadvantages

• Requires careful consideration of voltage compatibility between connected devices.
• May introduce noise or signal degradation during level shifting.

Working Principles

The 74LVT245PW/AUJ operates by utilizing a combination of level shifting and tri-state buffer techniques. It allows bidirectional data transfer between two voltage domains, ensuring compatibility between devices operating at different voltage levels. The direction control input determines the data flow direction, while the output enable input enables or disables the output drivers.

Detailed Application Field Plans

The 74LVT245PW/AUJ finds applications in various digital systems where level shifting and bus transceiver functionality is required. Some common application areas include: - Interfacing between microcontrollers and peripheral devices operating at different voltage levels. - Communication between FPGA (Field-Programmable Gate Array) modules with varying voltage requirements. - Level shifting in battery-powered portable devices to interface with external components.

Detailed and Complete Alternative Models

• SN74LVC245A: Similar octal bus transceiver with 3.3V to 5V voltage range.
• MC74LVX245: Octal non-inverting bus transceiver with 2.0V to 3.6V voltage range.
• CD74HCT245: Octal bus transceiver with TTL-compatible inputs and outputs.

Note: This is not an exhaustive list of alternative models, but provides a few examples.

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