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| Product attributes | Property Value |
| Manufacturer | National Semiconductor |
| Product Series | 54F |
| Packaging | Bulk | |
| Part Status | Active |
| Logic Type | Buffer, Non-Inverting |
| Number of Elements | 2 |
| Number of Bits per Element | 4 |
| Input Type | - |
| Output Type | 3-State |
| Current - Output High, Low | 12mA, 48mA |
| Voltage - Supply | 4.5V ~ 5.5V |
| Operating Temperature | -55°C ~ 125°C (TA) |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | 20-CFlatPack |
| Supplier Device Package | 20-CFlatPack |
The 54F241FMQB is a high-speed, non-inverting octal buffer from National Semiconductor, designed for demanding military and aerospace applications. Operating from a 4.5V to 5.5V supply, it delivers 12mA source and 48mA sink current, ensuring robust drive for capacitive loads and long traces. With 3-State outputs and two channel groups, it provides flexible bus isolation and multiplexing. Housed in a hermetic 20-CFlatPack, it operates reliably from -55°C to 125°C, making it ideal for avionics, satellite, and ruggedized industrial systems where performance and reliability are non-negotiable.
- High 48mA Sink Current: Drives heavy loads directly, reducing external driver components and simplifying PCB layout.
- Wide Temperature Range (-55°C to 125°C): Guarantees operation in extreme military and aerospace environments.
- 3-State Outputs: Enables safe bus sharing and multiplexing without signal contention.
- Proven 54F Bipolar Logic: Delivers fast propagation delays for high-speed data paths.
High-Reliability Bus Interfacing
In avionics and military systems, the 54F241FMQB provides robust 3-State buffering for data buses. Its 48mA sink capability ensures strong signal integrity over long backplanes, while the 54F logic family delivers fast propagation delays critical for real-time control.
Signal Buffering for Sensor Arrays
When interfacing multiple sensors to a central processor, this buffer isolates capacitive loads and prevents signal degradation. The non-inverting function preserves sensor polarity, simplifying firmware and reducing debug time in harsh environments.
Level Shifting in Mixed-Voltage Systems
Although optimized for 5V, the 3-State outputs allow safe connection to 3.3V logic when used with pull-up resistors. This enables gradual migration of legacy 5V subsystems to lower-power controllers without redesigning the entire board.
Driving High-Current Peripheral Loads
The 48mA sink current can directly drive relays, LEDs, or small solenoids in industrial control panels. This eliminates the need for external transistor drivers, reducing component count and improving mean time between failures (MTBF).
Memory Address Decoding
In memory expansion cards, the 54F241FMQB buffers address lines to multiple DRAM banks. Its 3-State outputs allow easy bus sharing with DMA controllers, ensuring reliable read/write operations across the full -55°C to 125°C temperature range.
Redundant System Architecture
For fault-tolerant computing, dual buffers can be paralleled with 3-State control to create hot-swappable modules. The high drive current ensures that even with one buffer disabled, the remaining path maintains full logic levels.
- Q: What is the logic family of the 54F241FMQB?
- A: It belongs to the 54F logic family, known for high-speed bipolar performance.
- Q: What is the function of this IC?
- A: It is a non-inverting buffer with 2 channels, ideal for signal conditioning and fan-out.
- Q: What output type does it feature?
- A: It features 3-State outputs, allowing connection to shared buses without contention.
- Q: What is the operating voltage range?
- A: It operates from 4.5V to 5.5V, making it compatible with standard 5V systems.
- Q: What is the output current capability?
- A: It can source/sink 12mA and 48mA respectively, providing robust drive for loads.
- Q: What package is available?
- A: It comes in a 20-CFlatPack, suitable for space-constrained military/aerospace designs.
54F241FMQB.pdf
- Q: What is the logic family of the 54F241FMQB?
- A: It belongs to the 54F logic family, known for high-speed bipolar performance.
- Q: What is the function of this IC?
- A: It is a non-inverting buffer with 2 channels, ideal for signal conditioning and fan-out.
- Q: What output type does it feature?
- A: It features 3-State outputs, allowing connection to shared buses without contention.
- Q: What is the operating voltage range?
- A: It operates from 4.5V to 5.5V, making it compatible with standard 5V systems.
- Q: What is the output current capability?
- A: It can source/sink 12mA and 48mA respectively, providing robust drive for loads.
- Q: What package is available?
- A: It comes in a 20-CFlatPack, suitable for space-constrained military/aerospace designs.