Overview
The 74HC540D is a high-speed CMOS octal bus buffer fabricated with silicon gate C2MOS technology, produced by Toshiba Semiconductor and Storage. This component is an inverting type, meaning it inverts the input signal at the output. It features 3-state outputs, which can be set to a high-impedance state when either of the enable inputs (G1 or G2) is high. This device is designed to achieve high-speed operation similar to equivalent LSTTL while maintaining the low power dissipation characteristic of CMOS technology.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Temperature Range | -40 to 125 | °C |
| Operating Voltage Range | 2.0 to 6.0 | V |
| Propagation Delay Time (typ.) | 10 | ns |
| Power Dissipation (max) | 4.0 | µA |
| Input Voltage Range | -0.5 to VCC + 0.5 | V |
| Output Voltage Range | -0.5 to VCC + 0.5 | V |
| Input Diode Current (max) | ±20 | mA |
| Output Diode Current (max) | ±20 | mA |
| Output Current (max) | ±35 | mA |
| Package Type | SOIC20 |
Key Features
- High-speed operation with propagation delay times as low as 10 ns (typ.) at VCC = 6.0 V.
- Low power dissipation with ICC of 4.0 µA (max) at Ta = 25 °C.
- Wide operating temperature range from -40 °C to 125 °C.
- Wide operating voltage range from 2.0 V to 6.0 V.
- 3-state outputs with high-impedance state when either G1 or G2 is high.
- Balanced propagation delays (tPLH ≈ tPHL).
- Protection circuits against static discharge or transient excess voltage.
Applications
The 74HC540D is suitable for various applications requiring high-speed data transmission and low power consumption, such as:
- High-speed digital circuits.
- Data communication systems.
- Computer peripherals.
- Automotive and industrial control systems.
- Any application needing 3-state bus buffering with inverting logic.
Q & A
- What is the 74HC540D?
The 74HC540D is a high-speed CMOS octal bus buffer with inverting 3-state outputs. - What is the operating temperature range of the 74HC540D?
The operating temperature range is from -40 °C to 125 °C. - What is the typical propagation delay time of the 74HC540D?
The typical propagation delay time is 10 ns at VCC = 6.0 V. - What is the maximum power dissipation of the 74HC540D?
The maximum power dissipation is 4.0 µA at Ta = 25 °C. - What package type is the 74HC540D available in?
The 74HC540D is available in a SOIC20 package. - How do the enable inputs (G1 and G2) affect the outputs?
When either G1 or G2 is high, the outputs are in the high-impedance state. - What kind of protection does the 74HC540D have against static discharge?
The 74HC540D has protection circuits against static discharge or transient excess voltage. - What is the operating voltage range of the 74HC540D?
The operating voltage range is from 2.0 V to 6.0 V. - Is the 74HC540D suitable for high-speed digital circuits?
Yes, it is suitable for high-speed digital circuits due to its low propagation delay times. - Can the 74HC540D be used in automotive applications?
Yes, it can be used in automotive and industrial control systems due to its wide operating temperature range and low power consumption.
