SN74ALS245ADW

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SN74ALS245ADW

IC TXRX NON-INVERT 5.5V 20SOIC

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  • 製造商。 部分 #SN74ALS245ADW
  • 包 20-SOIC
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規格

Package Bulk,Tube
Series 74ALS
ProductStatus Active
LogicType Transceiver, Non-Inverting
NumberofElements 1
NumberofBitsperElement 8
OutputType 3-State
Current-OutputHighLow 15mA, 24mA
Voltage-Supply 4.5V ~ 5.5V
OperatingTemperature 0°C ~ 70°C (TA)
MountingType Surface Mount
Package/Case 20-SOIC (0.295, 7.50mm Width)

概述

Description

The SN74ALS245ADW is an octal bus transceiver designed for bidirectional data transmission between two devices. It operates within the Advanced Low Power Schottky (ALS) family of ICs, which ensures high-speed performance and low power consumption. This device features two 8-bit data ports (A and B) and can function in both transmit and receive modes, making it ideal for interfacing between microcontrollers and peripheral devices.
Key features include a wide supply voltage range (4.5V to 5.5V), high-speed operation (up to 25 MHz), and a three-state output configuration which allows for multiple devices to share the same bus without interference. It is also designed with built-in protection against bus contention and has an active-low output enable (OE) for easy control of data flow. The SN74ALS245ADW is commonly used in applications like data communication, data buffering, and interfacing in digital systems, making it a versatile choice for engineers designing electronic circuits.

Features

The SN74ALS245ADW is a high-speed, octal bidirectional transceiver designed for data transmission between buses. Key features include:
1. Voltage Range: Operates with a supply voltage of 4.5V to 5.5V.
2. Data Flow Control: Supports bidirectional data flow, enabling easy communication between devices.
3. High-Speed Operation: Offers fast switching times (typically 25 ns), allowing for high-speed data transfer.
4. Bus-Compatible: Compatible with TTL logic levels, making it suitable for interfacing with other TTL devices.
5. Output Drive Capability: Can drive a minimum of 15 LSTTL loads, ensuring robust performance in heavy load applications.
6. Enable Control: Features separate enable pins for A and B ports, allowing for flexible control of data flow.
7. Package Type: Available in a 20-pin DIP package, making it easy to integrate into PCB layouts.
8. Thermal Resistance: Designed for low power consumption and thermal efficiency.
Overall, the SN74ALS245ADW is ideal for applications requiring reliable data transmission in digital systems.

Package

The SN74ALS245ADW is packaged in a 20-pin dual in-line package (DIP) with a wide body. It is commonly used for data bus transceivers in digital circuits.

Pinout

The SN74ALS245ADW is an octal bus transceiver with 20 pins. Its primary function is to facilitate data transfer between two buses in either direction while supporting both 3-state and active modes. The key pin functions include:
1. A1-A8 (Pins 2-9): Data inputs from bus A.
2. B1-B8 (Pins 13-20): Data outputs to bus B.
3. DIR (Pin 1): Direction control; high for A to B, low for B to A.
4. OE (Pin 19): Output enable; active low to enable the outputs.
5. GND (Pin 10): Ground connection.
6. VCC (Pin 20): Power supply connection.
This device is used in applications requiring data communication between different parts of a circuit, ensuring efficient data handling and minimized signal degradation.

Manufacturer

The SN74ALS245ADW is manufactured by Texas Instruments (TI), a leading global semiconductor company. Texas Instruments designs and produces a wide range of electronic components, including analog and digital integrated circuits, microcontrollers, and embedded processors. The company is known for its innovation in the field of analog and mixed-signal technology, serving various markets such as automotive, industrial, communications, and consumer electronics. Established in 1930, TI has a strong reputation for quality and reliability in its product offerings, contributing significantly to advancements in electronic design and development worldwide.

Application

The SN74ALS245ADW is a high-speed, octal bidirectional transceiver used in digital circuits for data buffering and transmission. Its primary applications include communication between microcontrollers and peripherals, data bus interfaces, and memory address/data lines in computer systems. It is commonly utilized in systems requiring level shifting, such as interfacing 5V and 3.3V devices, and in industrial automation, networking, and telecommunications for signal routing and data exchange.

Equivalent

The SN74ALS245ADW is an octal bus transceiver. Equivalent products include:
1. SN74LS245
2. SN74F245
3. SN74AHC245
4. SN74HCT245
5. MC74HC245
These devices offer similar functionality but may vary in speed, power consumption, and voltage levels. Always check the specific datasheets for exact specifications and compatibility.

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