SN74ALS648ANT

Product Overview

• Category: Integrated Circuit
• Use: Logic Level Translator
• Characteristics: High-speed, TTL-compatible, 8-bit bidirectional translator
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Translates signals between different voltage levels
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 6ns (typical)
• Maximum Operating Frequency: 100MHz

Detailed Pin Configuration

The SN74ALS648ANT has a total of 20 pins. The pin configuration is as follows:

1. OE (Output Enable) - Active Low Output Enable
2. A1 - Input/Output Port A Bit 1
3. A2 - Input/Output Port A Bit 2
4. A3 - Input/Output Port A Bit 3
5. A4 - Input/Output Port A Bit 4
6. A5 - Input/Output Port A Bit 5
7. A6 - Input/Output Port A Bit 6
8. A7 - Input/Output Port A Bit 7
9. A8 - Input/Output Port A Bit 8
10. GND (Ground) - Ground Reference
11. B8 - Input/Output Port B Bit 8
12. B7 - Input/Output Port B Bit 7
13. B6 - Input/Output Port B Bit 6
14. B5 - Input/Output Port B Bit 5
15. B4 - Input/Output Port B Bit 4
16. B3 - Input/Output Port B Bit 3
17. B2 - Input/Output Port B Bit 2
18. B1 - Input/Output Port B Bit 1
19. VCC - Positive Power Supply
20. GND (Ground) - Ground Reference

Functional Features

• Bidirectional voltage level translation between two independent buses
• TTL-compatible inputs and outputs
• Non-inverting translation
• Output enable control for disabling the outputs
• High-speed operation with low propagation delay

Advantages and Disadvantages

Advantages: - High-speed translation of signals - Wide operating temperature range - Easy integration into existing systems - Non-inverting translation preserves signal integrity

Disadvantages: - Limited voltage range (4.5V to 5.5V) - Requires external pull-up resistors for open-drain applications

Working Principles

The SN74ALS648ANT is a bidirectional logic level translator that allows communication between two buses operating at different voltage levels. It uses TTL-compatible inputs and outputs, ensuring compatibility with various logic families. The non-inverting translation feature preserves the integrity of the signals during translation.

The device operates by monitoring the input voltage levels on both sides and translating them to the corresponding output voltage levels. The OE pin controls the output enable function, allowing the user to disable the outputs when necessary.

Detailed Application Field Plans

The SN74ALS648ANT can be used in various applications where voltage level translation is required. Some potential application fields include:

1. Microcontroller interfacing: Translating signals between microcontrollers operating at different voltage levels.
2. Communication systems: Enabling communication between devices with different logic families or voltage requirements.
3. Industrial automation: Facilitating data exchange between different components of an automated system.
4. Automotive electronics: Supporting voltage level translation in automotive electronic systems.
5. IoT devices: Enabling communication between IoT devices with varying voltage levels.

Detailed and Complete Alternative Models

1. SN74LVC4245A: 8-bit dual-supply bus transceiver with configurable voltage translation and 3-state outputs.
2. TXB0108: 8-bit bidirectional voltage-level translator with automatic direction sensing.
3. PCA9306: Dual bidirectional I2C-bus and SMBus voltage-level translator with adjustable voltage levels.

These alternative models offer similar functionality to the SN74ALS648ANT and can be considered as alternatives based on specific requirements and application constraints.

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