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| Product attributes | Property Value |
| Manufacturer | National Semiconductor |
| Product Series | 74FCT |
| Packaging | Bulk | |
| Part Status | Active |
| Logic Type | Buffer, Non-Inverting |
| Number of Elements | 2 |
| Number of Bits per Element | 4 |
| Input Type | - |
| Output Type | Tri-State, Non-Inverted |
| 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-SOIC |
The 74FCT244AQSC from National Semiconductor is a high-speed octal buffer and line driver designed for 5V applications. As part of the 74FCT family, it offers fast propagation delays and high output drive of 15mA source and 64mA sink. The dual 4-bit configuration with tri-state outputs provides flexibility for bus-oriented systems. Operating from 4.75V to 5.25V, it is a drop-in replacement for many legacy 74F and 74ALS buffers. It is well-suited for memory address driving, peripheral interfacing, and general-purpose signal buffering in commercial temperature range (0°C to 70°C) applications. The 20-SOIC package is suitable for surface-mount designs.
- High Sink Current (64mA): Ensures robust drive capability for heavily loaded buses and long interconnects.
- Fast Propagation Delay: The 74FCT family is optimized for high-speed operation, minimizing signal latency.
- Tri-State Outputs: Provides essential bus isolation and multiplexing capabilities for shared-resource designs.
- Drop-in Compatibility: Pin-compatible with industry-standard 74FCT244 devices, simplifying upgrades.
Legacy 5V Bus Buffering
Ideal for buffering address and data buses in older 5V microprocessor systems, providing the necessary drive current and signal isolation.
Peripheral Interface Drivers
Use it to drive parallel printer ports, floppy disk controllers, and other legacy peripherals that require high output current.
Memory Board Address Drivers
In SRAM or EPROM memory boards, this buffer can drive the address lines to multiple memory chips, ensuring uniform propagation delays.
Test Equipment Channel Isolation
The tri-state outputs allow for channel isolation in test equipment, enabling multiple instruments to share a common test bus.
Industrial Control Signal Distribution
In industrial control panels, it can buffer and distribute control signals to multiple relays or actuator drivers, improving noise immunity.
Prototyping and Breadboarding
Its DIP-compatible SOIC package and simple logic function make it an excellent choice for prototyping 5V digital circuits.
- Q: What logic family does the 74FCT244AQSC belong to?
- A: It belongs to the 74FCT family, a high-speed CMOS logic family.
- Q: What is the function of this IC?
- A: It is a dual 4-bit non-inverting buffer/line driver.
- Q: How many channels does it have?
- A: It has 2 channels, each 4 bits wide, totaling 8 buffer lines.
- Q: What is the output type?
- A: The outputs are Tri-State (3-State) and non-inverted.
- Q: What is the operating voltage range?
- A: It operates from 4.75V to 5.25V, ideal for 5V systems.
- Q: What package is available?
- A: It is offered in a 20-SOIC (0.295", 7.50mm Width) package.
74FCT244AQSC.pdf
- Q: What logic family does the 74FCT244AQSC belong to?
- A: It belongs to the 74FCT family, a high-speed CMOS logic family.
- Q: What is the function of this IC?
- A: It is a dual 4-bit non-inverting buffer/line driver.
- Q: How many channels does it have?
- A: It has 2 channels, each 4 bits wide, totaling 8 buffer lines.
- Q: What is the output type?
- A: The outputs are Tri-State (3-State) and non-inverted.
- Q: What is the operating voltage range?
- A: It operates from 4.75V to 5.25V, ideal for 5V systems.
- Q: What package is available?
- A: It is offered in a 20-SOIC (0.295", 7.50mm Width) package.