MC74HC245ADTR2G

Product Overview

• Category: Integrated Circuit (IC)
• Use: Level shifting and signal buffering
• Characteristics: High-speed CMOS logic, 3-state outputs
• Package: TSSOP-20
• Essence: Bidirectional octal bus transceiver
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 2.0V to 6.0V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 10 ns (typical)
• Output Current: ±6 mA
• Input Capacitance: 3 pF (typical)

Pin Configuration

The MC74HC245ADTR2G has a total of 20 pins. The pin configuration is as follows:

1. OE (Output Enable) 1
2. A1 (Input/Output) 1
3. I/O1 (Bidirectional Data I/O) 1
4. GND (Ground)
5. I/O2 (Bidirectional Data I/O) 2
6. A2 (Input/Output) 2
7. I/O3 (Bidirectional Data I/O) 3
8. VCC (Supply Voltage)
9. I/O4 (Bidirectional Data I/O) 4
10. A3 (Input/Output) 3
11. I/O5 (Bidirectional Data I/O) 5
12. I/O6 (Bidirectional Data I/O) 6
13. A4 (Input/Output) 4
14. I/O7 (Bidirectional Data I/O) 7
15. I/O8 (Bidirectional Data I/O) 8
16. GND (Ground)
17. DIR (Direction Control)
18. OE (Output Enable) 2
19. VCC (Supply Voltage)
20. GND (Ground)

Functional Features

• Bidirectional data transfer between buses with different voltage levels
• High-speed operation suitable for fast data transmission
• 3-state outputs allow multiple devices to share a common bus
• Direction control pin for selecting the data flow direction
• Low power consumption in standby mode

Advantages and Disadvantages

Advantages: - Enables level shifting between different voltage domains - Supports bidirectional communication - Fast propagation delay time for efficient data transfer - Allows multiple devices to share a common bus

Disadvantages: - Limited output current capacity - Requires careful handling due to sensitivity to electrostatic discharge (ESD) - May not be suitable for applications requiring high noise immunity

Working Principles

The MC74HC245ADTR2G is a bidirectional octal bus transceiver that allows for level shifting and signal buffering between two buses with different voltage levels. It operates using high-speed CMOS logic, enabling fast data transmission. The device features 3-state outputs, which can be used to connect multiple devices to a common bus without causing conflicts.

The direction of data flow is controlled by the DIR pin. When DIR is set to a logic high, data is transferred from the A-side to the B-side. Conversely, when DIR is set to a logic low, data is transferred from the B-side to the A-side. The OE pins are used to enable or disable the outputs.

Detailed Application Field Plans

The MC74HC245ADTR2G is commonly used in various applications where level shifting and signal buffering are required. Some specific application fields include:

1. Communication systems: Used for interfacing between different voltage domains in communication devices such as routers, switches, and modems.
2. Industrial automation: Enables data transfer between different voltage levels in industrial control systems, PLCs (Programmable Logic Controllers), and motor drives.
3. Automotive electronics: Facilitates communication between various subsystems in automotive applications, including infotainment systems, engine control units, and body control modules.
4. Consumer electronics: Used in devices like smartphones, tablets, and gaming consoles to interface between different voltage domains and enable efficient data transfer.

Detailed and Complete Alternative Models

1. SN74HC245N: Similar bidirectional octal bus transceiver with 3-state outputs, available in DIP-20 package.
2. CD74HCT245E: Octal bus transceiver with 3-state outputs, compatible with TTL logic levels, available in PDIP-20 package.
3. 74LVTH245A: Low-voltage bidirectional transceiver with 3-state outputs, operates at 3.3V, available in TSSOP-20 package.

These alternative models offer similar functionality and can be used as replacements for the MC74HC245