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| Product attributes | Property Value |
| Manufacturer | onsemi |
| Product Series | 74HC |
| Packaging | Bulk | |
| Part Status | Active |
| Logic Type | Buffer, Non-Inverting |
| Number of Elements | 4 |
| Number of Bits per Element | 1 |
| Input Type | - |
| Output Type | 3-State |
| Current - Output High, Low | 7.8mA, 7.8mA |
| Voltage - Supply | 2V ~ 6V |
| Operating Temperature | -55°C ~ 125°C (TA) |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | 14-SOIC (0.209", 5.30mm Width) |
| Supplier Device Package | 14-SOIC |
| ROHS |  |
The MC74HC126AFR2 from onsemi is a high-speed CMOS quad buffer featuring non-inverting outputs with 3-State capability. Operating from 2V to 6V, it provides 7.8mA output current per channel, making it ideal for bus-oriented systems. The 14-pin SOIC package is suitable for space-constrained designs. Typical applications include memory address buffering, I/O expansion, and signal conditioning in industrial and automotive electronics.
- Wide 2V to 6V Supply Range: Compatible with both 3.3V and 5V systems, simplifying mixed-voltage design.
- 3-State Outputs: Enables bus multiplexing and reduces power consumption when outputs are disabled.
- High-Temperature Operation (-55°C to 125°C): Suitable for automotive and industrial environments.
- 7.8mA Drive Capability: Provides sufficient current for driving capacitive loads and long traces.
Microcontroller I/O Expansion
Use the MC74HC126AFR2 to buffer and isolate microcontroller I/O pins. The 3-State outputs allow multiple peripherals to share a single data bus without contention, controlled by individual enable signals.
Bus Line Driving
With its 7.8mA source and sink capability, this buffer can drive long PCB traces and capacitive loads in digital systems, ensuring signal integrity across backplanes and inter-board connections.
Level Shifting for Mixed-Voltage Systems
Operating from 2V to 6V, it can interface between 3.3V and 5V logic domains. The non-inverting buffer preserves logic polarity while providing necessary drive strength.
Memory Address Buffering
In memory systems, the 4-channel buffer can fan out address signals to multiple memory banks. The 3-State outputs enable easy bank selection and bus isolation during read/write cycles.
Industrial Sensor Interfacing
In industrial controls, this buffer conditions signals from sensors and encoders. Its wide temperature range (-55°C to 125°C) ensures reliable operation in harsh environments.
Test Equipment Signal Routing
Use the 3-State outputs to route test signals in automated test equipment. Individual channel enables allow dynamic reconfiguration of signal paths without external switching components.
- Q: What is the logic family of the MC74HC126AFR2?
- A: It belongs to the 74HC (High-Speed CMOS) logic family.
- Q: What function does this IC perform?
- A: It is a quad (4-channel) non-inverting buffer with 3-State outputs.
- Q: How many channels does it have?
- A: It has 4 independent buffer channels.
- Q: What is the output type?
- A: The outputs are 3-State, allowing for connection to shared buses.
- Q: What is the operating voltage range?
- A: It operates from 2V to 6V, making it compatible with TTL and CMOS logic levels.
- Q: What package is available?
- A: It is offered in a 14-pin SOIC package (5.30mm width).
MC74HC126AFR2.pdf
- Q: What is the logic family of the MC74HC126AFR2?
- A: It belongs to the 74HC (High-Speed CMOS) logic family.
- Q: What function does this IC perform?
- A: It is a quad (4-channel) non-inverting buffer with 3-State outputs.
- Q: How many channels does it have?
- A: It has 4 independent buffer channels.
- Q: What is the output type?
- A: The outputs are 3-State, allowing for connection to shared buses.
- Q: What is the operating voltage range?
- A: It operates from 2V to 6V, making it compatible with TTL and CMOS logic levels.
- Q: What package is available?
- A: It is offered in a 14-pin SOIC package (5.30mm width).