Encyclopedia Entry: 74LCX16821MEAX

Product Information Overview

Category: Integrated Circuit (IC)

Use: The 74LCX16821MEAX is a high-performance, low-voltage, 20-bit universal bus transceiver with 3-state outputs. It is designed for asynchronous communication between data buses.

Characteristics: This IC operates at a voltage range of 2.3V to 3.6V and offers a wide temperature range for reliable performance. It features 3-state outputs, allowing multiple devices to share a common bus without interference. The 74LCX16821MEAX is known for its high-speed operation and low power consumption.

Package: The 74LCX16821MEAX is available in a small-outline integrated circuit (SOIC) package.

Essence: The essence of the 74LCX16821MEAX lies in its ability to facilitate efficient and reliable data transmission between different components of a digital system.

Packaging/Quantity: The 74LCX16821MEAX is typically sold in reels or tubes, with each reel/tube containing a specific quantity of ICs. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Operating Voltage Range: 2.3V to 3.6V
• Input/Output Compatibility: 5V TTL/CMOS Logic Levels
• Maximum Data Rate: 400 Mbps
• Number of Bits: 20
• Output Drive Capability: ±24mA
• Propagation Delay: 2.8ns (Max)
• Power Consumption: Low Power CMOS Technology

Detailed Pin Configuration

The 74LCX16821MEAX has a total of 48 pins. Here is a detailed pin configuration:

1. A0 - Address Input
2. A1 - Address Input
3. A2 - Address Input
4. A3 - Address Input
5. A4 - Address Input
6. A5 - Address Input
7. A6 - Address Input
8. A7 - Address Input
9. A8 - Address Input
10. A9 - Address Input
11. OE - Output Enable Input
12. DIR - Direction Control Input
13. GND - Ground
14. D0 - Data I/O
15. D1 - Data I/O
16. D2 - Data I/O
17. D3 - Data I/O
18. D4 - Data I/O
19. D5 - Data I/O
20. D6 - Data I/O
21. D7 - Data I/O
22. D8 - Data I/O
23. D9 - Data I/O
24. VCC - Power Supply
25. D10 - Data I/O
26. D11 - Data I/O
27. D12 - Data I/O
28. D13 - Data I/O
29. D14 - Data I/O
30. D15 - Data I/O
31. D16 - Data I/O
32. D17 - Data I/O
33. D18 - Data I/O
34. D19 - Data I/O
35. GND - Ground
36. NC - No Connection
37. NC - No Connection
38. NC - No Connection
39. NC - No Connection
40. NC - No Connection
41. NC - No Connection
42. NC - No Connection
43. NC - No Connection
44. NC - No Connection
45. NC - No Connection
46. VCC - Power Supply
47. NC - No Connection
48. NC - No Connection

Functional Features

The 74LCX16821MEAX offers the following functional features:

• Bidirectional Data Transfer: It allows data to be transmitted in both directions, enabling efficient communication between different components of a digital system.
• 3-State Outputs: The IC supports 3-state outputs, which enable multiple devices to share a common bus without interference.
• Low Power Consumption: The IC utilizes low power CMOS technology, making it energy-efficient and suitable for battery-powered applications.
• High-Speed Operation: With a maximum data rate of 400 Mbps, the IC ensures fast and reliable data transmission.

Advantages and Disadvantages

Advantages: - Wide operating voltage range allows compatibility with various systems. - 3-state outputs facilitate bus sharing and prevent data conflicts. - High-speed operation enables efficient data transfer. - Low power consumption makes it suitable for portable devices.

Disadvantages: - Limited number of bits (20) may not be sufficient for certain applications requiring larger data buses. - Availability and pricing may vary depending on the supplier.

Working Principles

The 74LCX16821MEAX operates based on the principles of digital logic. It uses address inputs, data