74HC540 Octal 3-State Inverting Buffer IC is a high-performance CMOS logic buffer designed for bus-oriented applications requiring controlled data flow, signal inversion, and high noise immunity. Built using High-Speed CMOS (HC) technology, the 74HC540 delivers low power consumption, fast switching speeds, and reliable tri-state outputs, making it ideal for modern digital circuits.
This IC features eight independent inverting buffers with two active-LOW output enable (OE) inputs, allowing complete isolation of the output lines when disabled. The tri-state functionality ensures safe connection to shared data buses and prevents signal contention in complex digital systems such as microcontroller interfaces, memory buses, and industrial control circuits.
Key Features of 74HC540 IC
-
Octal Inverting Buffer
Contains eight independent inverting buffer channels for simultaneous multi-bit signal processing. -
3-State Outputs
Outputs can be placed in a high-impedance state, allowing multiple devices to share a common bus. -
High-Speed CMOS Technology
Offers fast propagation delay and excellent performance at low power levels. -
Low Power Consumption
Significantly lower power dissipation compared to traditional TTL logic ICs. -
Wide Operating Voltage Range
Operates from 2V to 6V, compatible with both TTL and CMOS logic levels. -
Dual Active-LOW Output Enable Pins
Provides flexible and reliable control of output activation. -
High Noise Immunity
Ensures stable operation in electrically noisy environments. -
Standard DIP and SMD Packages
Available in DIP-20, SOIC-20, and TSSOP-20 packages for easy integration.
Technical Specifications
| Parameter | Description |
|---|---|
| IC Type | Octal 3-State Inverting Buffer |
| Logic Family | 74HC (High-Speed CMOS) |
| Number of Channels | 8 |
| Output Type | Tri-State (3-State) |
| Logic Function | Inverting |
| Supply Voltage (Vcc) | 2V to 6V |
| Input Voltage Range | 0V to Vcc |
| Propagation Delay | Typically 8–15 ns (at 5V) |
| Output Drive Capability | ±6 mA |
| Operating Temperature | –40°C to +85°C |
| Enable Inputs | Two active-LOW OE pins |
| Package Options | DIP-20, SOIC-20, TSSOP-20 |
Applications of 74HC540 Octal Buffer IC
The 74HC540 IC is widely used in digital electronics where signal inversion, buffering, and bus isolation are required. Common applications include:
🔹 Microcontroller & Processor Interfaces
Used to buffer address and data lines between microcontrollers, CPUs, and peripherals, improving signal integrity.
🔹 Data Bus Isolation
Ideal for shared bus systems, where tri-state control prevents data collisions.
🔹 Memory Address & Data Buffering
Commonly used in RAM, ROM, and EEPROM interfacing to drive long traces and multiple loads.
🔹 Industrial Control Systems
Provides reliable signal conditioning in PLC systems, automation controllers, and factory equipment.
🔹 Embedded Systems
Ensures clean logic transitions and proper logic inversion in embedded control boards.
🔹 Communication Equipment
Used in serial/parallel communication interfaces for buffering and inversion of control signals.
🔹 Educational & DIY Electronics
Popular in electronics labs, academic projects, and prototyping due to its simplicity and reliability.
Why Choose the 74HC540 IC?
The 74HC540 Octal 3-State Inverting Buffer IC offers the perfect balance of speed, power efficiency, and flexibility. Its tri-state capability allows seamless integration into bus-based systems, while CMOS technology ensures long-term reliability and low heat generation. Compared to traditional TTL buffers, the 74HC540 delivers superior performance with reduced power consumption.
Whether you are designing microcontroller boards, memory interfaces, or industrial electronics, the 74HC540 is a dependable choice for buffering and isolating digital signals.
Buy 74HC540 Octal 3-State Inverting Buffer IC Today
Enhance your digital designs with high-speed buffering, low power consumption, and reliable tri-state control using the 74HC540 IC—a trusted component for professional and hobbyist electronics alike.
Package Includes:
1 x 74HC540 Octal 3-state Inverting Buffer IC (DIP- 20 Package)
FAQ
1. Where can we buy this 74HC540 Octal 3-state Inverting Buffer IC?
This product is available online https://aiiottech.in/product/74hc540-octal-3-state-inverting-buffer-ic/ and also available at our store in Pudupakkam/Kelambakkam, Chennai-603103
2. When can I get this 74HC540 Octal 3-state Inverting Buffer IC after placing the order?
RGRJ AIIoT TECHNOLOGIES will immediately ship and deliver the product within 1-3 working days.
Video Link: What is Buffer ? Why Buffer and Tri-State Buffers are used in Digital Circuits ?
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