Overview
The 74HC240D is a high-speed CMOS octal bus buffer integrated circuit manufactured by Toshiba Semiconductor and Storage. This device is fabricated using silicon gate C2MOS technology, which enables high-speed operation similar to equivalent LSTTL while maintaining the low power dissipation characteristic of CMOS technology. The 74HC240D features inverting 3-state outputs and is designed for use in applications such as 3-state memory address drivers.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 2.0 | - | 6.0 | V |
| Operating Temperature (Topr) | -40 | - | 125 | °C |
| Propagation Delay Time (tPLH, tPHL) | 10 | 6 | 15 | ns |
| Output Enable Time (tPZL, tPZH) | 12 | 10 | 18 | ns |
| Output Disable Time (tPLZ, tPHZ) | 14 | 10 | 21 | ns |
| Input Capacitance (CIN) | - | - | 10 | pF |
| Power Dissipation (ICC) | - | - | 4.0 | µA |
Key Features
- Wide Operating Temperature Range: -40°C to 125°C (for products manufactured after July 2020)
- High Speed Operation: Propagation delay time of 10 ns (typ.) at VCC = 6.0 V
- Low Power Dissipation: Maximum current consumption of 4.0 µA at Ta = 25°C
- Balanced Propagation Delays: tPLH ≈ tPHL
- Wide Operating Voltage Range: 2.0 V to 6.0 V
- 3-State Outputs: Inverting outputs with two active-low output enables
- Protection Circuits: All inputs are equipped with protection circuits against static discharge or transient excess voltage
Applications
The 74HC240D is designed for use in various digital circuit applications, including:
- 3-state memory address drivers
- High-speed data transmission systems
- Buffering and line driving in digital circuits
- Applications requiring low power consumption and high-speed operation
Q & A
- What is the 74HC240D?
The 74HC240D is a high-speed CMOS octal bus buffer integrated circuit with inverting 3-state outputs.
- Who manufactures the 74HC240D?
The 74HC240D is manufactured by Toshiba Semiconductor and Storage.
- What is the operating temperature range of the 74HC240D?
The operating temperature range is -40°C to 125°C (for products manufactured after July 2020).
- What is the typical propagation delay time of the 74HC240D?
The typical propagation delay time is 10 ns at VCC = 6.0 V.
- What is the maximum power dissipation of the 74HC240D?
The maximum power dissipation is 4.0 µA at Ta = 25°C.
- Does the 74HC240D have protection against static discharge?
Yes, all inputs are equipped with protection circuits against static discharge or transient excess voltage.
- What is the operating voltage range of the 74HC240D?
The operating voltage range is 2.0 V to 6.0 V.
- What type of outputs does the 74HC240D have?
The 74HC240D has inverting 3-state outputs with two active-low output enables.
- What are some common applications of the 74HC240D?
Common applications include 3-state memory address drivers, high-speed data transmission systems, and buffering and line driving in digital circuits.
- What is the packaging type of the 74HC240D?
The 74HC240D is available in SOIC20 packaging.
