SN74ABT646DBR

Product Overview

Category: Integrated Circuit (IC)

Use: The SN74ABT646DBR is a high-speed octal bus transceiver with 3-state outputs. It is designed to interface between TTL and CMOS voltage levels, making it suitable for various digital applications.

Characteristics: - High-speed operation - Bidirectional data flow - 3-state outputs for bus isolation - TTL and CMOS compatible inputs - Wide operating voltage range - Low power consumption

Package: SSOP (Shrink Small Outline Package)

Essence: The SN74ABT646DBR is an essential component in digital systems where data needs to be transmitted bidirectionally between different voltage domains.

Packaging/Quantity: The SN74ABT646DBR is typically packaged in reels or tubes, containing a quantity of 250 units per package.

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 (max)
• Output Current: ±12mA

Pin Configuration

The SN74ABT646DBR has a total of 24 pins. The pin configuration is as follows:

┌───┬───┐ A1 -|1 └─ 24|- Vcc B1 -|2 23|- OE# A2 -|3 22|- B7 B2 -|4 21|- A7 A3 -|5 20|- B6 B3 -|6 19|- A6 A4 -|7 18|- B5 B4 -|8 17|- A5 GND-|9 16|- B5 DIR-|10 15|- A4 OE#-|11 14|- B3 B1 -|12 13|- A3 └───────┘

Functional Features

• Bidirectional data transfer: The SN74ABT646DBR allows data to be transmitted in both directions, enabling communication between different parts of a digital system.
• 3-state outputs: The 3-state outputs provide bus isolation, allowing multiple devices to share the same bus without interfering with each other.
• TTL and CMOS compatibility: The inputs of the SN74ABT646DBR are compatible with both TTL and CMOS voltage levels, making it versatile for various applications.
• High-speed operation: With a propagation delay time of only 6ns, the SN74ABT646DBR ensures fast and efficient data transmission.

Advantages and Disadvantages

Advantages: - Versatile compatibility with TTL and CMOS voltage levels - High-speed operation for efficient data transfer - 3-state outputs for bus isolation - Wide operating voltage range

Disadvantages: - Limited output current capacity - Requires careful consideration of voltage levels to prevent damage

Working Principles

The SN74ABT646DBR operates by receiving input signals from one side and transmitting them to the other side bidirectionally. It uses internal circuitry to convert between TTL and CMOS voltage levels, ensuring compatibility between different parts of a digital system. The 3-state outputs allow the device to isolate itself from the bus when necessary, preventing conflicts with other devices.

Detailed Application Field Plans

The SN74ABT646DBR is commonly used in various digital systems, including but not limited to: - Microprocessor and microcontroller interfaces - Data communication systems - Memory modules - Industrial control systems - Automotive electronics

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to the SN74ABT646DBR are: - SN74ABT646DWR: Similar functionality but packaged in a different form factor (SOIC). - SN74ABT646ADB: Higher output current capacity for applications requiring more driving capability. - SN74ABT646APW: Available in a wider temperature range for extreme operating conditions.

These alternative models provide similar functionality with slight variations in package type, output current capacity, or operating temperature range. The choice of the specific model depends on the requirements of the application.

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