CD74FCT245E

Product Overview

• Category: Integrated Circuit (IC)
• Use: Bus Transceiver
• Characteristics: High-speed, Bi-directional, 8-bit transceiver
• Package: 20-pin DIP (Dual In-line Package)
• Essence: Facilitates bidirectional data transfer between two buses with different voltage levels
• Packaging/Quantity: Available in reels of 250 units

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
• Propagation Delay Time: 6ns (typical)
• Output Current: ±24mA
• Input Capacitance: 4pF (typical)

Detailed Pin Configuration

The CD74FCT245E has a total of 20 pins, which are assigned as follows:

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

Functional Features

• Bi-directional data transfer between two buses with different voltage levels
• High-speed operation for efficient data transmission
• Output enable control for disabling the outputs when not in use
• Direction control to select the direction of data flow

Advantages and Disadvantages

Advantages: - Enables seamless communication between buses operating at different voltage levels - Fast propagation delay ensures quick data transfer - Compact package size allows for easy integration into various electronic systems

Disadvantages: - Limited to 8-bit data transfer - Requires careful consideration of voltage compatibility between buses

Working Principles

The CD74FCT245E is a bidirectional bus transceiver that facilitates data transfer between two buses with different voltage levels. It operates by controlling the direction of data flow using the DIR pin. When DIR is set to logic high, data flows from Bus A to Bus B, and when DIR is set to logic low, data flows from Bus B to Bus A.

The OE pin is used to enable or disable the outputs. When OE is set to logic low, the outputs are enabled, allowing data to be transmitted. Conversely, when OE is set to logic high, the outputs are disabled, preventing any data transfer.

Detailed Application Field Plans

The CD74FCT245E is commonly used in various applications where bidirectional data transfer between buses with different voltage levels is required. Some typical application fields include:

1. Microcontroller interfacing with external memory modules
2. Communication interfaces between different logic families
3. Data communication between peripheral devices and microcontrollers
4. Level shifting between different voltage domains in mixed-signal systems

Detailed and Complete Alternative Models

1. SN74LV245A: Low-voltage, 8-bit bus transceiver
2. CD74HC245: High-speed CMOS, 8-bit bus transceiver
3. MC74ACT245: Advanced CMOS, 8-bit bus transceiver
4. SN74LVC245A: Low-voltage CMOS, 8-bit bus transceiver

These alternative models offer similar functionality to the CD74FCT245E but may have different characteristics, specifications, or package options.

In conclusion, the CD74FCT245E is a high-speed, bi-directional bus transceiver that enables efficient data transfer between buses with different voltage levels. Its compact package, functional features, and wide application field make it a versatile choice for various electronic systems.