SN74LV245AZQNR

Product Overview

Category

SN74LV245AZQNR belongs to the category of integrated circuits (ICs).

Use

It is commonly used as a bidirectional octal bus transceiver.

Characteristics

• Low-voltage operation: 2.0 V to 5.5 V
• High-speed performance: 4 ns propagation delay
• Bidirectional data flow
• 3-state outputs for bus-oriented applications
• Schmitt-trigger inputs for noise immunity
• Available in a small-outline package (SOIC)

Package and Quantity

SN74LV245AZQNR is available in a 20-pin small-outline integrated circuit (SOIC) package. It is typically sold in reels or tubes, with a quantity of 2500 units per reel.

Specifications

• Supply voltage range: 2.0 V to 5.5 V
• Input voltage range: -0.5 V to VCC + 0.5 V
• Output voltage range: -0.5 V to VCC + 0.5 V
• Operating temperature range: -40°C to 85°C
• Maximum input current: ±10 mA
• Maximum output current: ±32 mA
• Propagation delay time: 4 ns (typical)
• Rise/fall time: 1.5 ns (typical)

Pin Configuration

The pin configuration of SN74LV245AZQNR is as follows:

__ __ A1 |1 `--' 20| VCC B1 |2 19| OE# A2 |3 18| B2 B2 |4 17| A3 A3 |5 16| B3 B3 |6 15| A4 A4 |7 14| B4 B4 |8 13| A5 GND|9 12| B5 OE#|10 11| A6 ``````````

Functional Features

• Bidirectional data transfer: SN74LV245AZQNR allows data to be transmitted in both directions, making it suitable for bus-oriented applications.
• 3-state outputs: The device has 3-state outputs, enabling multiple devices to share a common bus without contention.
• Schmitt-trigger inputs: The Schmitt-trigger inputs provide noise immunity and improve the reliability of signal reception.

Advantages and Disadvantages

Advantages

• Low-voltage operation allows compatibility with a wide range of systems.
• High-speed performance ensures efficient data transfer.
• 3-state outputs enable bus sharing without conflicts.
• Schmitt-trigger inputs enhance noise immunity.

Disadvantages

• Limited operating temperature range (-40°C to 85°C).
• Maximum output current may not be sufficient for certain high-current applications.

Working Principles

SN74LV245AZQNR operates by receiving input signals on its A1-A6 pins and transmitting them to the corresponding B1-B6 pins when the output enable (OE#) pin is active. Conversely, when the OE# pin is inactive, the device receives input signals on its B1-B6 pins and transmits them to the corresponding A1-A6 pins.

The bidirectional data flow is achieved through a combination of internal circuitry that controls the direction of data transmission based on the state of the OE# pin.

Detailed Application Field Plans

SN74LV245AZQNR finds applications in various fields, including:

1. Microcontroller interfacing: It can be used to interface microcontrollers with external devices, such as sensors or actuators, allowing bidirectional data transfer.
2. Data communication: The device is suitable for use in bus systems, such as I2C or SPI, where multiple devices need to share a common data bus.
3. Industrial automation: SN74LV245AZQNR can be employed in industrial automation systems to facilitate communication between different modules or subsystems.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to SN74LV245AZQNR are:

1. 74HC245: This model operates at a higher voltage range (2 V to 6 V) and has comparable characteristics and pin configuration.
2. CD74HCT245: It is a CMOS-based model with a wider operating temperature range (-55°C to 125°C) and similar specifications.
3. SN74LVC245A: This model operates at a lower voltage range (1.65 V to 5.5 V) and offers improved speed performance compared to SN74LV245AZQNR.

These alternative models can be considered based on specific application requirements and compatibility with existing systems.

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