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74HC7540DB

Name: 74HC7540DB
Rating: 4.7 (12 reviews)

Buffers & Line Drivers OCT SCHMITT TRIG 3ST

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概述

Description

The 74HC7540DB is a high-speed CMOS logic device that functions as an 8-bit buffer/driver with 3-state outputs. It is part of the 74HC (High-speed CMOS) series, designed for low power consumption and high noise immunity. The device features eight input/output ports that can drive a significant load, making it suitable for interfacing with microcontrollers and other digital circuitry.
Key specifications include a supply voltage range of 2V to 6V, typical propagation delays of 15ns at 5V, and the ability to operate in both active and tri-state modes, facilitating various applications in digital systems, such as data bus buffering and signal conditioning. The 74HC7540DB is encapsulated in a 20-pin dual in-line package (DIP), which eases integration into circuits.
Overall, the 74HC7540DB is widely used in applications requiring reliable signal transmission with minimal delay, making it a versatile component in modern digital electronics.

Features

The 74HC7540DB is a high-speed CMOS logic device featuring a dual 4-bit binary counter. Key features include:
1. Dual 4-Bit Counter: It can count in binary from 0 to 15 in two separate channels.
2. Asynchronous Reset: Each counter can be asynchronously reset to zero, allowing for flexible operation.
3. Synchronous Counting: Supports synchronous operation, ensuring simultaneous counting across both counters.
4. Low Power Consumption: Offers low static and dynamic power consumption, making it suitable for battery-operated devices.
5. High-Speed Operation: Typical propagation delay is low, allowing for high-speed applications.
6. Wide Voltage Range: Operates within a supply voltage range of 2V to 6V, compatible with various logic families.
7. TTL Compatible: Compatible with TTL (Transistor-Transistor Logic) levels, enabling easy integration into existing systems.
These features make the 74HC7540DB ideal for counting applications in digital circuits and embedded systems.

Package

The 74HC7540DB is packaged in a 16-pin Dual In-Line Package (DIP) format.

Pinout

The 74HC7540DB is a hexadecimal buffer/driver IC with a total of 20 pins. Its primary function is to provide high-speed buffering and driving capabilities for digital signals.
### Pin Count and Functions:
- Total Pins: 20
- Input Pins: 6 (A1 to A6)
- Output Pins: 6 (Y1 to Y6)
- Control Pins:
- GND: Ground connection
- VCC: Supply voltage (typically +2V to +6V)
- OE (Output Enable): Active low control to enable or disable the outputs
- Unused Pins: 8 pins are either NC (not connected) or reserved, depending on the specific package.
The device is designed to drive high capacitive loads and improve signal integrity in digital circuits.

Manufacturer

The 74HC7540DB is manufactured by Texas Instruments (TI), a prominent American technology company. Texas Instruments is primarily known for designing and producing semiconductors, particularly integrated circuits (ICs), as well as various electronics products. The company is a leader in the analog and embedded processing segments, serving a wide array of industries, including automotive, industrial, communications, and consumer electronics. TI is highly regarded for its innovation in technology and engineering, offering a vast range of products that cater to both professional and educational markets.

Application

The 74HC7540DB is a hex buffer/driver with three-state outputs, commonly used in digital circuits for signal buffering, driving LEDs, and interfacing between different logic levels. Its application areas include data communication, memory interfacing, and signal conditioning in computer systems. It is also useful in bus-oriented applications where multiple devices share data lines, ensuring signal integrity and reducing loading effects.

Equivalent

The 74HC7540DB is a dual 4-input NAND gate with open-collector outputs. Equivalent products include the 74HCT7540, 74LS7540, and 74F7540. Additionally, similar functions can be found in devices like 74HC20 (dual 4-input NAND gate) or 74HC30 (8-input NAND gate). Always check specific pin configurations and electrical characteristics for compatibility.