SN74BCT2245DWR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Bus Transceiver
• Characteristics: Bidirectional, 8-bit, non-inverting, tri-state
• Package: SOIC-20
• Essence: Transfers data between two bidirectional buses with different voltage levels
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• High-Level Input Voltage: 2V to VCC + 0.5V
• Low-Level Input Voltage: -0.5V to 0.8V
• High-Level Output Voltage: VCC - 0.5V
• Low-Level Output Voltage: 0.5V
• Maximum Operating Frequency: 40MHz
• Propagation Delay Time: 10ns
• Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

The SN74BCT2245DWR has a total of 20 pins. The pin configuration is as follows:

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

Functional Features

• Bidirectional data transfer between two buses with different voltage levels
• Non-inverting logic ensures the same data polarity on both buses
• Tri-state outputs allow multiple devices to share the same bus without interference
• Output Enable (OE) pins control the direction of data flow
• Direction Control (DIR) pin determines the active bus

Advantages and Disadvantages

Advantages: - Enables communication between buses operating at different voltage levels - Non-inverting logic preserves data integrity - Tri-state outputs facilitate bus sharing - Wide operating temperature range allows for various applications

Disadvantages: - Limited to 8-bit data transfer - Propagation delay may affect real-time applications - Requires careful consideration of voltage compatibility

Working Principles

The SN74BCT2245DWR acts as a bidirectional buffer, allowing data transfer between two buses with different voltage levels. The DIR pin determines the active bus, while the OE pins control the direction of data flow. When the OE pin is low, the device is enabled, and data can be transferred bidirectionally. Conversely, when the OE pin is high, the outputs are in a high-impedance state, isolating the device from the buses.

Detailed Application Field Plans

The SN74BCT2245DWR finds application in various scenarios where data transfer between buses with different voltage levels is required. Some potential application fields include:

1. Industrial Automation: Facilitating communication between different subsystems operating at varying voltage levels.
2. Automotive Electronics: Enabling data exchange between components with different voltage requirements, such as sensors and control units.
3. Telecommunications: Supporting data transmission between devices operating at different voltage levels, ensuring compatibility and signal integrity.

Detailed and Complete Alternative Models

1. SN74LVC4245A: Similar bidirectional bus transceiver with 8-bit non-inverting tri-state outputs. Operates at a lower voltage range of 1.65V to 5.5V.
2. SN74AVC4T245: Four-bit bidirectional level shifter and translator with 3-state outputs. Supports voltage translation between different logic families.
3. SN74LVCH245A: Octal bus transceiver with 3-state outputs. Provides voltage level shifting capabilities for bidirectional data transfer.

(Note: The above alternative models are provided as examples and not an exhaustive list.)

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