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| Product attributes | Property Value |
| Manufacturer | National Semiconductor |
| Product Series | 74FCT |
| Packaging | Bulk | |
| Part Status | Active |
| Logic Type | Buffer, Inverting |
| Number of Elements | 2 |
| Number of Bits per Element | 4 |
| Input Type | - |
| Output Type | 3-State |
| Current - Output High, Low | 15mA, 64mA |
| Voltage - Supply | 4.75V ~ 5.25V |
| Operating Temperature | 0°C ~ 70°C (TA) |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | 20-SOIC (0.295", 7.50mm Width) |
| Supplier Device Package | 20-SOP |
The 74FCT240ASC from National Semiconductor is a dual inverting buffer designed for 5V systems. Operating from 4.75V to 5.25V, it provides 15mA source and 64mA sink current, offering robust drive for bus applications. The 3-State outputs allow multiple devices to share a common bus safely. Packaged in a 20-SOIC, this buffer is ideal for address decoding, control signal generation, and industrial control logic where signal inversion is required.
- Inverting Function: Provides signal inversion without additional logic gates, saving board space and cost.
- High Sink Current (64mA): Drives heavy capacitive loads and long bus lines effectively.
- 3-State Outputs: Enables bus sharing and prevents data contention in multi-device systems.
- Standard 20-SOIC Package: Easy to integrate into existing designs and suitable for prototyping.
Inverting Bus Drivers
The 74FCT240ASC is ideal for applications requiring signal inversion, such as address decoding and control signal generation. Its 64mA sink capability drives heavy bus loads.
Memory Address Inversion
In memory systems, this buffer can invert address lines to match specific memory mapping requirements. The 3-State outputs allow multiple memory banks to share the same address bus.
Industrial Control Logic
For industrial controllers, this device provides inverting buffering for sensor signals and control outputs. The 0°C to 70°C temperature range suits commercial and light industrial environments.
Test Equipment Signal Conditioning
In bench test equipment, the inverting buffer can be used to generate complementary signals for differential testing. The 15mA source current is sufficient for driving logic analyzers.
Peripheral Device Interfacing
For legacy peripherals requiring inverted control signals, this buffer provides the necessary drive strength and logic inversion in a single package.
Prototyping and Breadboarding
With its standard 20-SOIC package, this buffer is easy to integrate into prototype designs, providing reliable inverting buffering for various logic experiments.
- Q: What logic family does the 74FCT240ASC belong to?
- A: It is part of the 74FCT family, known for high-speed, low-power CMOS technology.
- Q: What is the function of this IC?
- A: It is a dual (2-channel) inverting buffer, providing signal inversion with high drive capability.
- Q: What is the output type?
- A: The outputs are 3-State, allowing connection to shared buses with high-impedance state.
- Q: What is the operating voltage range?
- A: It operates from 4.75V to 5.25V, compatible with standard 5V systems.
- Q: How many channels does it have?
- A: It has 2 channels, each providing an inverting buffer path.
- Q: What package is available?
- A: It comes in a 20-SOIC (0.295", 7.50mm Width) package.
74FCT240ASC.pdf
- Q: What logic family does the 74FCT240ASC belong to?
- A: It is part of the 74FCT family, known for high-speed, low-power CMOS technology.
- Q: What is the function of this IC?
- A: It is a dual (2-channel) inverting buffer, providing signal inversion with high drive capability.
- Q: What is the output type?
- A: The outputs are 3-State, allowing connection to shared buses with high-impedance state.
- Q: What is the operating voltage range?
- A: It operates from 4.75V to 5.25V, compatible with standard 5V systems.
- Q: How many channels does it have?
- A: It has 2 channels, each providing an inverting buffer path.
- Q: What package is available?
- A: It comes in a 20-SOIC (0.295", 7.50mm Width) package.