SN74AC245DBR

Product Overview

• Category: Integrated Circuit
• Use: Level Shifter/Transceiver
• Characteristics: High-speed, low-power, bidirectional voltage-level translation
• Package: SSOP (Shrink Small Outline Package)
• Essence: Transfers data between different voltage domains
• Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

• Supply Voltage Range: 2 V to 6 V
• Input Voltage Range: 0 V to VCC
• Output Voltage Range: 0 V to VCC
• High-Level Input Voltage: 0.7 x VCC to VCC
• Low-Level Input Voltage: 0 V to 0.3 x VCC
• High-Level Output Voltage: 0.9 x VCC to VCC
• Low-Level Output Voltage: 0 V to 0.1 x VCC
• Maximum Operating Frequency: 125 MHz
• Number of Pins: 20

Detailed Pin Configuration

1. OE (Output Enable)
2. A1 (Data Input/Output)
3. B1 (Data Input/Output)
4. A2 (Data Input/Output)
5. B2 (Data Input/Output)
6. A3 (Data Input/Output)
7. B3 (Data Input/Output)
8. A4 (Data Input/Output)
9. B4 (Data Input/Output)
10. GND (Ground)
11. B5 (Data Input/Output)
12. A5 (Data Input/Output)
13. B6 (Data Input/Output)
14. A6 (Data Input/Output)
15. B7 (Data Input/Output)
16. A7 (Data Input/Output)
17. B8 (Data Input/Output)
18. A8 (Data Input/Output)
19. VCC (Supply Voltage)
20. DIR (Direction Control)

Functional Features

• Bidirectional voltage-level translation between two different voltage domains
• High-speed operation with low propagation delay
• Supports voltage translation from 2 V to 6 V
• Output enable control for disabling the outputs
• Direction control for selecting the data flow direction

Advantages and Disadvantages

Advantages

• High-speed operation allows for efficient data transfer
• Low-power consumption for energy-efficient applications
• Bidirectional functionality simplifies circuit design
• Wide supply voltage range provides flexibility in various systems

Disadvantages

• Limited maximum operating frequency compared to some other level shifters
• SSOP package may require careful handling during assembly

Working Principles

The SN74AC245DBR is a bidirectional level shifter/transceiver integrated circuit. It facilitates the translation of digital signals between two voltage domains, allowing communication between devices operating at different voltage levels. The device uses a combination of input/output buffers and control logic to ensure proper voltage translation.

The direction of data flow is controlled by the DIR pin. When DIR is set to a specific logic level, the data is transferred from one side to the other. The OE pin enables or disables the outputs, providing additional control over the data transmission.

Detailed Application Field Plans

The SN74AC245DBR is commonly used in various applications where voltage-level translation is required. Some of the typical application fields include:

1. Microcontroller interfacing with peripherals operating at different voltage levels
2. Communication interfaces between different logic families (e.g., TTL and CMOS)
3. Level shifting in battery-powered devices to conserve power
4. Signal conversion in mixed-voltage systems

Detailed and Complete Alternative Models

1. SN74LVC245APW - Low-Voltage CMOS Octal Bus Transceiver
2. SN74HCT245N - High-Speed CMOS Octal Bus Transceiver
3. SN74LVCH245ADBR - Low-Voltage CMOS Octal Bus Transceiver with 3-State Outputs
4. SN74AHC245PW - High-Speed CMOS Octal Bus Transceiver with 3-State Outputs

These alternative models offer similar functionality and can be used as replacements for the SN74AC245DBR in various applications.

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