74LCX646MSA

Product Overview

• Category: Integrated Circuit (IC)
• Use: Data Bus Transceiver
• Characteristics: Low Voltage, Octal Bidirectional Transceiver, 3-State Outputs
• Package: Surface Mount, 48-pin TSSOP (Thin Shrink Small Outline Package)
• Essence: High-speed, low-power CMOS technology
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage: 2.3V to 3.6V
• Input/Output Voltage Levels: 5V Tolerant
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay: 4.5ns (Max)
• Output Drive Capability: ±24mA
• Number of Channels: 8
• Output Type: 3-State

Detailed Pin Configuration

The 74LCX646MSA has a total of 48 pins. The pin configuration is as follows:

1. OE (Output Enable) 1
2. A1 (Address Input) 1
3. A2 (Address Input) 2
4. GND (Ground)
5. I/O1 (Data Input/Output) 1
6. I/O2 (Data Input/Output) 2
7. VCC (Power Supply)
8. I/O3 (Data Input/Output) 3
9. I/O4 (Data Input/Output) 4
10. I/O5 (Data Input/Output) 5
11. I/O6 (Data Input/Output) 6
12. I/O7 (Data Input/Output) 7
13. I/O8 (Data Input/Output) 8
14. DIR (Direction Control)
15. GND (Ground)
16. OE (Output Enable) 2
17. A1 (Address Input) 3
18. A2 (Address Input) 4
19. I/O9 (Data Input/Output) 9
20. I/O10 (Data Input/Output) 10
21. VCC (Power Supply)
22. I/O11 (Data Input/Output) 11
23. I/O12 (Data Input/Output) 12
24. I/O13 (Data Input/Output) 13
25. I/O14 (Data Input/Output) 14
26. I/O15 (Data Input/Output) 15
27. I/O16 (Data Input/Output) 16
28. DIR (Direction Control)
29. GND (Ground)
30. OE (Output Enable) 3
31. A1 (Address Input) 5
32. A2 (Address Input) 6
33. I/O17 (Data Input/Output) 17
34. I/O18 (Data Input/Output) 18
35. VCC (Power Supply)
36. I/O19 (Data Input/Output) 19
37. I/O20 (Data Input/Output) 20
38. I/O21 (Data Input/Output) 21
39. I/O22 (Data Input/Output) 22
40. I/O23 (Data Input/Output) 23
41. I/O24 (Data Input/Output) 24
42. DIR (Direction Control)
43. GND (Ground)
44. OE (Output Enable) 4
45. A1 (Address Input) 7
46. A2 (Address Input) 8
47. I/O25 (Data Input/Output) 25
48. I/O26 (Data Input/Output) 26

Functional Features

• Bidirectional data transfer between two independent buses
• 3-state outputs for bus isolation
• Low voltage operation for reduced power consumption
• High-speed operation for efficient data transmission
• 5V tolerant input/output levels for compatibility with different logic families

Advantages and Disadvantages

Advantages

• Supports bidirectional data transfer, enabling versatile communication between buses.
• 3-state outputs allow for bus isolation, preventing conflicts and ensuring reliable data transmission.
• Low voltage operation reduces power consumption, making it suitable for battery-powered devices.
• High-speed operation enables fast data transfer, improving overall system performance.
• 5V tolerant input/output levels provide compatibility with various logic families.

Disadvantages

• Limited number of channels (8), which may not be sufficient for complex systems requiring more connections.
• Surface mount package may require specialized equipment for soldering and handling.

Working Principles

The 74LCX646MSA is a bidirectional data bus transceiver that allows data to be transferred between two independent