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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-TSSOP (0.173", 4.40mm Width) |
| Supplier Device Package | 14-TSSOP |
| ROHS |  |
The MC74HC126ADT is a high-speed CMOS quad buffer featuring non-inverting outputs with 3-state capability. Operating from 2V to 6V, it provides a versatile solution for bus-oriented systems, signal buffering, and level shifting. Each of the four channels can source or sink 7.8mA, making it suitable for driving LEDs and other moderate loads. Housed in a compact 14-TSSOP package, this buffer is ideal for space-constrained designs in industrial control, consumer electronics, and communication equipment.
- Wide 2V to 6V Supply Range: Compatible with both 3.3V and 5V systems, simplifying mixed-voltage designs.
- 3-State Outputs: Enables bus multiplexing and reduces power consumption when outputs are disabled.
- High-Speed CMOS Technology: Provides fast propagation delays while maintaining low power dissipation.
- Wide Temperature Range (-55°C to 125°C): Suitable for automotive and industrial environments.
Bus Line Driving
The 3-state outputs allow multiple MC74HC126ADT devices to be connected to a common data bus. When not selected, the outputs enter a high-impedance state, preventing bus contention.
Signal Buffering for CMOS Logic
As a non-inverting buffer, it can strengthen weak digital signals from a microcontroller or FPGA, ensuring clean signal integrity over longer PCB traces.
Level Shifting Between 3.3V and 5V Systems
With a wide 2V to 6V supply range, it can be used to interface 3.3V logic to 5V logic, providing a simple level-shifting solution.
Driving Multiple Loads
Each output can source or sink 7.8mA, making it suitable for driving multiple LED indicators or low-power relays in industrial control panels.
Memory Address Decoding
In microprocessor systems, the buffer can be used to isolate and drive address lines, reducing capacitive loading on the CPU output pins.
Test Equipment and Instrumentation
The 3-state feature is ideal for multiplexing signals in automated test equipment, allowing one measurement point to be shared among several sensors.
- Q: What is the logic family of the MC74HC126ADT?
- A: It belongs to the 74HC (High-Speed CMOS) logic family.
- 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 type of output does it feature?
- A: It features 3-state outputs, allowing for bus-oriented applications.
- 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 available in a 14-pin TSSOP package.
MC74HC126ADT.pdf
- Q: What is the logic family of the MC74HC126ADT?
- A: It belongs to the 74HC (High-Speed CMOS) logic family.
- 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 type of output does it feature?
- A: It features 3-state outputs, allowing for bus-oriented applications.
- 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 available in a 14-pin TSSOP package.