SN74ALS245ANG4

Product Overview

• Category: Integrated Circuit
• Use: Bus Transceiver
• Characteristics: High-speed, TTL-compatible, 3-state outputs
• Package: PDIP (Plastic Dual In-Line Package)
• Essence: Transfers data between two bidirectional buses
• Packaging/Quantity: Tube packaging, 25 pieces per tube

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: 8ns (typical)
• Output Current: ±24mA
• Input Capacitance: 4pF
• Output Capacitance: 8pF

Detailed Pin Configuration

The SN74ALS245ANG4 has a total of 20 pins. The pin configuration is as follows:

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

Functional Features

• Bidirectional Data Transfer: Allows data to be transferred between two bidirectional buses.
• High-Speed Operation: Provides fast data transfer with a typical propagation delay time of 8ns.
• TTL-Compatible Inputs: Accepts TTL logic levels, making it compatible with a wide range of devices.
• 3-State Outputs: Enables the outputs to be disabled, allowing multiple devices to share the same bus.

Advantages and Disadvantages

Advantages: - High-speed operation allows for efficient data transfer. - TTL compatibility ensures compatibility with various devices. - 3-state outputs enable bus sharing among multiple devices.

Disadvantages: - Limited supply voltage range (4.5V to 5.5V). - Relatively small input and output capacitance may limit its use in certain applications.

Working Principles

The SN74ALS245ANG4 is a bus transceiver that facilitates bidirectional data transfer between two buses. The direction of data flow is controlled by the DIR pin. 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 OE pin enables or disables the outputs. When OE is low, the outputs are enabled, allowing data to be transmitted. When OE is high, the outputs are disabled, effectively disconnecting the device from the bus.

The TTL-compatible inputs ensure seamless integration with other TTL logic devices, while the 3-state outputs allow multiple devices to share the same bus without interference.

Detailed Application Field Plans

The SN74ALS245ANG4 is commonly used in various applications, including:

1. Microprocessor Systems: Facilitates communication between the microprocessor and peripheral devices.
2. Data Acquisition Systems: Transfers data between sensors and data acquisition modules.
3. Industrial Automation: Connects different components of automated systems, such as PLCs and control panels.
4. Communication Equipment: Enables data transmission between different communication modules.
5. Automotive Electronics: Used in automotive control systems for data transfer between various components.

Detailed and Complete Alternative Models

1. SN74ALS244A: Octal Buffers/Line Drivers with 3-State Outputs
2. SN74LS245: Octal Bus Transceiver with 3-State Outputs
3. SN74HC245: Octal Bus Transceiver with 3-State Outputs
4. SN74HCT245: Octal Bus Transceiver with 3-State Outputs
5. SN74LVC245A: Octal Bus Transceiver with 3-State Outputs

These alternative models offer similar functionality and can be used as replacements for the SN74ALS245ANG4 in various applications.

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