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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 MC74HC126AFL1 from onsemi is a high-performance quad non-inverting buffer with 3-State outputs. Operating from 2V to 6V, it delivers 7.8mA of drive current per channel. The 3-State outputs enable bus-oriented applications, allowing multiple devices to share a common data path. Its wide temperature range (-55°C to 125°C) makes it suitable for demanding automotive and industrial applications. The 14-pin SOIC package provides a compact footprint for space-constrained designs.
- Wide Temperature Range (-55°C to 125°C): Designed for extreme automotive and industrial environments.
- 3-State Outputs: Enables safe bus sharing and prevents data corruption in multi-device systems.
- Low Power Consumption: CMOS technology ensures minimal quiescent current, ideal for battery-powered devices.
- High Noise Immunity: CMOS input thresholds provide excellent noise margins in industrial settings.
Microcontroller I/O Expansion
Use the MC74HC126AFL1 to buffer and expand the output drive capability of a microcontroller. The 3-State outputs allow multiple peripherals to be connected to a single I/O line, with each buffer enabled only when needed.
Memory Address/Data Bus Buffering
In microprocessor systems, this buffer can isolate the CPU from the memory bus. The 3-State outputs prevent bus contention during read/write cycles, improving system reliability.
Level Shifting for Sensor Interfaces
Interface 5V sensor outputs to a 3.3V logic system. When powered at 3.3V, the buffer accepts 5V inputs (due to CMOS thresholds) and outputs clean 3.3V logic levels.
Driving High-Capacitance Cables
Drive long ribbon cables or PCB traces with high parasitic capacitance. The 7.8mA output current capability ensures fast rise/fall times, maintaining signal integrity.
Power Management Control
Use the 3-State enable pins to control power sequencing. Place outputs in high-impedance state during power-up to prevent glitches on critical control lines.
Automotive ECU Signal Conditioning
With a -55°C to 125°C operating range, this buffer is ideal for automotive engine control units, buffering signals from sensors and driving actuators in harsh thermal environments.
- Q: What is the logic family of the MC74HC126AFL1?
- A: It is part of the 74HC (High-Speed CMOS) family, operating from 2V to 6V.
- Q: What is the function of this IC?
- 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 high-impedance states for bus sharing.
- Q: What is the supply voltage range?
- A: The recommended supply voltage is 2V to 6V.
- Q: What package is available?
- A: It is available in a 14-pin SOIC package with a 5.30mm width.
MC74HC126AFL1.pdf
- Q: What is the logic family of the MC74HC126AFL1?
- A: It is part of the 74HC (High-Speed CMOS) family, operating from 2V to 6V.
- Q: What is the function of this IC?
- 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 high-impedance states for bus sharing.
- Q: What is the supply voltage range?
- A: The recommended supply voltage is 2V to 6V.
- Q: What package is available?
- A: It is available in a 14-pin SOIC package with a 5.30mm width.