Encyclopedia Entry: 74ACT11245DW

Product Information Overview

Category: Integrated Circuit (IC)

Use: The 74ACT11245DW is a high-speed octal bus transceiver with 3-state outputs. It is designed to provide bidirectional communication between two buses operating at different voltage levels.

Characteristics: - High-speed operation - Wide voltage range compatibility - 3-state outputs for bus isolation - Octal configuration with eight bidirectional channels

Package: The 74ACT11245DW is available in a standard 48-pin plastic dual in-line package (PDIP).

Essence: This IC serves as a bridge between two buses, allowing data transmission between them while maintaining compatibility with different voltage levels.

Packaging/Quantity: The 74ACT11245DW is typically sold in reels or tubes, with quantities varying depending on the supplier.

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
• Maximum Propagation Delay: 6ns
• Maximum Output Current: ±24mA

Detailed Pin Configuration

The 74ACT11245DW has a total of 48 pins, which are assigned specific functions. Here is a detailed pin configuration:

1. OE (Output Enable) 1
2. A1 (Data Bus A) 1
3. B1 (Data Bus B) 1
4. GND (Ground)
5. B2 (Data Bus B) 2
6. A2 (Data Bus A) 2
7. OE (Output Enable) 2
8. Y1 (Data Bus Y) 1
9. Y2 (Data Bus Y) 2
10. VCC (Supply Voltage)
11. A3 (Data Bus A) 3
12. B3 (Data Bus B) 3
13. OE (Output Enable) 3
14. GND (Ground)
15. B4 (Data Bus B) 4
16. A4 (Data Bus A) 4
17. OE (Output Enable) 4
18. Y3 (Data Bus Y) 3
19. Y4 (Data Bus Y) 4
20. VCC (Supply Voltage)
21. A5 (Data Bus A) 5
22. B5 (Data Bus B) 5
23. OE (Output Enable) 5
24. GND (Ground)
25. B6 (Data Bus B) 6
26. A6 (Data Bus A) 6
27. OE (Output Enable) 6
28. Y5 (Data Bus Y) 5
29. Y6 (Data Bus Y) 6
30. VCC (Supply Voltage)
31. A7 (Data Bus A) 7
32. B7 (Data Bus B) 7
33. OE (Output Enable) 7
34. GND (Ground)
35. B8 (Data Bus B) 8
36. A8 (Data Bus A) 8
37. OE (Output Enable) 8
38. Y7 (Data Bus Y) 7
39. Y8 (Data Bus Y) 8
40. VCC (Supply Voltage) 41-48. NC (No Connection)

Functional Features

The 74ACT11245DW offers the following functional features:

1. Bidirectional Data Transfer: It allows data to be transmitted bidirectionally between two buses, enabling communication in both directions.
2. Voltage Level Compatibility: The IC supports operation with different voltage levels on the two buses, ensuring compatibility between them.
3. Output Enable Control: The OE pins enable or disable the outputs, providing 3-state functionality for bus isolation.
4. High-Speed Operation: With a maximum propagation delay of 6ns, the IC ensures fast data transmission.

Advantages and Disadvantages

Advantages: - Enables communication between buses with different voltage levels - Provides bidirectional data transfer - Supports high-speed operation - Offers 3-state outputs for bus isolation

Disadvantages: - Limited to octal configuration (8 channels) - Requires careful consideration of voltage level compatibility

Working Principles

The 74ACT11245DW operates based on the principles of bidirectional data transfer and voltage level conversion. When enabled, it allows data to flow bidirectionally between two buses, even if they operate at different voltage levels. The IC's internal circuitry ensures proper voltage level translation, maintaining compatibility between the buses.

Detailed Application Field Plans

The 74ACT11245DW finds applications in