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SN74HCT245N

Name: SN74HCT245N
Rating: 4.7 (12 reviews)

IC TXRX NON-INVERT 5.5V 20DIP

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包 PDIP (N)-20
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規格

Package	Tube
Series	74HCT
ProductStatus	Active
LogicType	Transceiver, Non-Inverting
NumberofElements	1
NumberofBitsperElement	8
OutputType	3-State
Current-OutputHighLow	6mA, 6mA
Voltage-Supply	4.5V ~ 5.5V
OperatingTemperature	-40°C ~ 85°C (TA)
MountingType	Through Hole
Package/Case	20-DIP (0.300, 7.62mm)

概述

Description

The SN74HCT245N is an octal buffer/driver with 3-state outputs, designed for use in high-speed digital circuits. It is part of Texas Instruments' HCT (High-speed CMOS TTL compatible) family, making it suitable for interfacing between TTL and CMOS logic levels.
This device features eight independent buffer/driver channels, which can be enabled or disabled via the output enable (OE) pin. When enabled, it drives the outputs high or low based on the input signals (A1-A8). The 3-state capability allows multiple devices to share the same data bus without interference, making it ideal for applications like data transmission and bus management.
The SN74HCT245N operates over a voltage range of 4.5V to 5.5V and provides a high-speed performance with propagation delays as low as 9ns at Vcc = 5V. Its wide operating temperature range and compatibility with standard TTL levels make it suitable for various digital communication applications, including computer and networking equipment.

Features

The SN74HCT245N is an octal bus transceiver with 3-state outputs, designed for high-speed applications. Key features include:
1. 8-Bit Data Transfer: It supports simultaneous data transfer across 8 bits.
2. 3-State Outputs: Outputs can be in one of three states: high, low, or high-impedance, allowing for bus sharing.
3. Dual Supply Voltage: Compatible with TTL levels, it operates with a supply voltage range of 4.5V to 5.5V.
4. Direction Control: The transceiver allows bi-directional data flow with a direction control pin.
5. Low Power Consumption: It has a low quiescent current, making it suitable for battery-operated devices.
6. Fast Switching: High-speed operation with a maximum propagation delay of 15 ns (typical at 5V).
7. Wide Operating Temperature: It operates within a temperature range of -40°C to +125°C.
8. Enhanced Noise Immunity: Provides improved performance against noise due to HCT logic levels.
These features make the SN74HCT245N ideal for interfacing applications in digital circuits.

Package

The SN74HCT245N is typically available in a 20-pin dual in-line package (DIP). It can also be found in other package types like SOIC and TSSOP, depending on the specific variant.

Pinout

The SN74HCT245N is an octal bus transceiver with 20 pins. Its primary function is to provide bidirectional data transmission between two buses. It can drive loads and is designed to operate with TTL-compatible inputs and outputs.
Pin Count: 20 pins
Key Pins and Functions:
1. A1 - A8: Data inputs from one bus.
2. B1 - B8: Data outputs to another bus.
3. DIR: Direction control pin (high for A to B, low for B to A).
4. OE: Output enable pin (active low).
5. GND: Ground connection.
6. VCC: Power supply connection.
The device is often used in data routing applications in digital systems, where it helps to manage data flow between components while maintaining signal integrity.

Manufacturer

The SN74HCT245N is manufactured by Texas Instruments (TI), a prominent American technology company. Texas Instruments designs and produces semiconductors and various integrated circuits (ICs), with a strong focus on analog and digital signal processing. The company is well-known for its innovations in the semiconductor industry, particularly in areas like microcontrollers, processors, and various forms of logic devices. Founded in 1930, TI serves a wide range of markets, including automotive, industrial, communications, and consumer electronics, making it a key player in the global electronics landscape.

Application

The SN74HCT245N is an octal bus transceiver used in various applications, including data buffering and driver circuits in digital electronics. It is ideal for interfacing between different logic families, level shifting, and expanding data buses in microcontroller and microprocessor systems. Common use cases include communication between peripheral devices, memory interfacing, and connecting multiple devices on a single bus, enhancing signal integrity and reliability in high-speed digital circuits.

Equivalent

Equivalent products to the SN74HCT245N include the 74HCT245, 74HC245, and 74LVC245. Other options may include the TI 74AHC245 and various compatible logic buffers and drivers from manufacturers like NXP and ON Semiconductor, ensuring voltage compatibility and similar specifications. Always check datasheets for specific pin configurations and electrical characteristics.