SN74ALS648ADWRE4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Logic Level Translator
• Characteristics: High-speed, Non-Inverting, 8-bit Bidirectional
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Translates logic levels between different voltage domains
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Logic Family: ALS
• Number of Bits: 8
• Input Voltage Range: 2V to 6V
• Output Voltage Range: 2V to 6V
• Propagation Delay Time: 5ns (typical)
• Operating Temperature Range: -40°C to +85°C
• Supply Voltage: 4.5V to 5.5V

Detailed Pin Configuration

1. VCCB: Supply voltage for B-side (output side)
2. GND: Ground reference
3. A1-A8: Input pins for A-side (input side)
4. OE: Output Enable pin
5. B1-B8: Output pins for B-side (output side)
6. VCCA: Supply voltage for A-side (input side)

Functional Features

• Bidirectional level translation between two voltage domains
• Non-inverting logic translation
• High-speed operation
• Supports 8-bit data transmission
• Output enable control for tri-state operation

Advantages

• Allows interfacing between devices operating at different voltage levels
• Provides seamless communication between incompatible systems
• High-speed operation enables efficient data transfer
• Non-inverting translation preserves signal integrity
• Tri-state output allows multiple devices to share a common bus

Disadvantages

• Limited to 8-bit data transmission
• Requires careful consideration of voltage compatibility between input and output sides
• May introduce propagation delay, affecting real-time applications

Working Principles

The SN74ALS648ADWRE4 is a logic level translator designed to enable communication between devices operating at different voltage levels. It utilizes non-inverting buffers to translate logic signals bidirectionally. The device features separate supply voltages for the input (A-side) and output (B-side) sections, allowing for voltage level conversion.

When the Output Enable (OE) pin is high, the device is enabled, and the logic signals on the A-side are translated to the corresponding voltage levels on the B-side. Conversely, when OE is low, the outputs are tri-stated, effectively disconnecting the A-side from the B-side.

Detailed Application Field Plans

The SN74ALS648ADWRE4 finds application in various scenarios where logic level translation is required. Some potential fields of application include:

1. Microcontroller Interfacing: The IC can be used to interface microcontrollers operating at different voltage levels, enabling seamless communication between them.
2. Mixed Voltage Systems: In systems with multiple voltage domains, the IC facilitates data transfer between incompatible components, such as sensors, memory modules, or communication interfaces.
3. Industrial Automation: The device can be employed in industrial automation systems to bridge the gap between different logic voltage standards used by various equipment and control units.
4. Embedded Systems: Embedded systems often require interfacing with peripherals operating at different voltage levels. The IC ensures proper translation and compatibility in such scenarios.

Detailed and Complete Alternative Models

1. SN74LVC4245APWR: 8-bit dual-supply bus transceiver
2. TXS0108EPWR: 8-bit level shifter and voltage translator
3. PCA9306DCUR: Dual bidirectional I2C-bus and SMBus voltage-level translator

These alternative models offer similar functionality and can be considered as alternatives to the SN74ALS648ADWRE4, depending on specific requirements and constraints.

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