CD74AC623E

Product Overview

• Category: Integrated Circuit
• Use: Data Storage and Transfer
• Characteristics: High-speed, Low-power, 8-bit Bus Transceiver
• Package: DIP (Dual In-line Package)
• Essence: The CD74AC623E is a versatile integrated circuit that facilitates bidirectional data transfer between two buses. It operates at high speeds while consuming low power, making it suitable for various applications.
• Packaging/Quantity: Available in tubes or reels, with varying quantities depending on the supplier.

Specifications

• Supply Voltage: 2V to 6V
• Operating Temperature Range: -40°C to +85°C
• Input/Output Compatibility: TTL, CMOS
• Propagation Delay: 5ns (typical)
• Output Drive Capability: ±24mA
• Number of Pins: 20

Detailed Pin Configuration

The CD74AC623E has a total of 20 pins, which are assigned specific functions as follows:

1. A0: Input/Output pin for bus A, bit 0
2. A1: Input/Output pin for bus A, bit 1
3. A2: Input/Output pin for bus A, bit 2
4. A3: Input/Output pin for bus A, bit 3
5. A4: Input/Output pin for bus A, bit 4
6. A5: Input/Output pin for bus A, bit 5
7. A6: Input/Output pin for bus A, bit 6
8. A7: Input/Output pin for bus A, bit 7
9. GND: Ground (0V)
10. B7: Input/Output pin for bus B, bit 7
11. B6: Input/Output pin for bus B, bit 6
12. B5: Input/Output pin for bus B, bit 5
13. B4: Input/Output pin for bus B, bit 4
14. B3: Input/Output pin for bus B, bit 3
15. B2: Input/Output pin for bus B, bit 2
16. B1: Input/Output pin for bus B, bit 1
17. B0: Input/Output pin for bus B, bit 0
18. OE: Output Enable (active low)
19. DIR: Direction Control
20. VCC: Supply Voltage

Functional Features

• Bidirectional data transfer between two buses (A and B)
• High-speed operation with low power consumption
• TTL and CMOS compatible inputs and outputs
• Output drive capability of ±24mA allows direct connection to other devices
• Output enable and direction control pins provide flexibility in controlling data flow

Advantages and Disadvantages

Advantages

• High-speed operation enables efficient data transfer
• Low power consumption helps conserve energy
• Versatile compatibility with TTL and CMOS devices
• Robust output drive capability allows direct connection to various components

Disadvantages

• Limited number of input/output pins restricts the size of data that can be transferred simultaneously
• Requires careful consideration of signal timing due to propagation delay

Working Principles

The CD74AC623E operates based on a bidirectional transceiver principle. It allows data to flow bidirectionally between two buses (A and B) depending on the state of the direction control pin (DIR). When DIR is high, data flows from bus A to bus B, and when DIR is low, data flows from bus B to bus A. The output enable pin (OE) controls the tri-state outputs, enabling or disabling the data transfer.

Detailed Application Field Plans

The CD74AC623E finds applications in various fields where bidirectional data transfer is required. Some potential application areas include:

1. Data communication systems
2. Microcontroller interfacing
3. Memory modules
4. Industrial automation
5. Automotive electronics

Detailed and Complete Alternative Models

• SN74AC623: Similar functionality with minor variations in specifications
• 74HC623: CMOS compatible alternative with different voltage range
• CD74HCT623: High-speed CMOS alternative with TTL compatibility

These alternative models offer similar functionality to the CD74AC623E but may have differences in operating characteristics and pin configurations.

In conclusion, the CD74AC623E is a versatile integrated circuit that facilitates bidirectional data transfer between two buses. Its high-speed operation, low power consumption, and compatibility with TTL and CMOS devices make it suitable for various applications in data storage and transfer.