SN74LS245NSR

Product Overview

Category

SN74LS245NSR belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used for bus transceiver applications.

Characteristics

• High-speed, low-power Schottky technology
• 8-bit bidirectional data transfer
• Non-inverting outputs
• 3-state outputs
• Wide operating voltage range: 4.75V to 5.25V
• Low power consumption: typically 10mW
• Operating temperature range: -40°C to +85°C

Package

SN74LS245NSR is available in a small-outline package (SOIC) with 20 pins.

Essence

The essence of SN74LS245NSR lies in its ability to facilitate bidirectional data transfer between two buses.

Packaging/Quantity

SN74LS245NSR is typically packaged in reels and comes in quantities of 2500 units per reel.

Specifications

• Supply voltage: 4.75V to 5.25V
• Input voltage: 0V to VCC
• Output voltage: 0V to VCC
• Input current: ±0.1mA
• Output current: ±15mA
• Propagation delay time: 15ns (max)
• Rise/fall time: 6ns (typ)
• Power dissipation: 500mW (max)

Detailed Pin Configuration

1. A1 - Data bus A, bit 1
2. B1 - Data bus B, bit 1
3. GND - Ground
4. A2 - Data bus A, bit 2
5. B2 - Data bus B, bit 2
6. A3 - Data bus A, bit 3
7. B3 - Data bus B, bit 3
8. A4 - Data bus A, bit 4
9. B4 - Data bus B, bit 4
10. A5 - Data bus A, bit 5
11. B5 - Data bus B, bit 5
12. A6 - Data bus A, bit 6
13. B6 - Data bus B, bit 6
14. A7 - Data bus A, bit 7
15. B7 - Data bus B, bit 7
16. A8 - Data bus A, bit 8
17. B8 - Data bus B, bit 8
18. DIR - Direction control input
19. GND - Ground
20. VCC - Supply voltage

Functional Features

• Bidirectional data transfer: SN74LS245NSR allows data to be transferred bidirectionally between two buses.
• Non-inverting outputs: The outputs of this IC are non-inverting, ensuring the integrity of the data during transfer.
• 3-state outputs: The outputs can be put into a high-impedance state, allowing multiple devices to share the same bus without interference.
• High-speed operation: Utilizing high-speed Schottky technology, this IC ensures fast data transfer.

Advantages and Disadvantages

Advantages

• High-speed operation enables efficient data transfer.
• Non-inverting outputs maintain data integrity.
• 3-state outputs allow for bus sharing among multiple devices.
• Wide operating voltage range provides flexibility in various applications.

Disadvantages

• Limited number of data bits (8-bit) may not be suitable for applications requiring larger data transfers.
• Power dissipation may be relatively high compared to newer ICs with lower power consumption.

Working Principles

SN74LS245NSR operates based on the principle of bidirectional data transfer. It receives data from one bus and transmits it to another, or vice versa, depending on the direction control input. The non-inverting outputs ensure that the data remains unchanged during transfer. The 3-state outputs allow the IC to disconnect from the bus when not actively transferring data, preventing interference with other devices connected to the same bus.

Detailed Application Field Plans

SN74LS245NSR finds applications in various fields, including: 1. Microprocessor systems 2. Data communication systems 3. Industrial automation 4. Automotive electronics 5. Consumer electronics

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to SN74LS245NSR are: 1. SN74HC245N 2. SN74HCT245N 3. CD74HCT245E 4. MC74HC245AN 5. 74ACT245SCX

These alternative models offer similar functionality and characteristics, providing options for different design requirements.

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