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| Product attributes | Property Value |
| Manufacturer | Fairchild Semiconductor |
| 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 | -40°C ~ 85°C (TA) |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) |
| Supplier Device Package | 14-SOIC |
| ROHS |  |
The MM74HC125M is a quad non-inverting buffer from Fairchild Semiconductor's 74HC family. It operates from 2V to 6V and features 3-state outputs capable of sourcing or sinking 7.8mA. This buffer is ideal for bus interfacing, signal buffering, and level shifting in digital systems. Its wide temperature range (-40°C to 85°C) suits industrial applications. The 14-SOIC package is a standard, widely used form factor.
- 3-State Outputs: Enable bus sharing and prevent signal contention in multi-device systems.
- Wide 2V to 6V Supply Range: Compatible with both 3.3V and 5V logic, simplifying mixed-voltage designs.
- High Output Drive (7.8mA): Can drive LEDs, relays, and long traces without additional buffers.
- Industry-Standard 74HC Family: Proven reliability and wide availability.
Bus Interfacing in Microprocessor Systems
The 3-state outputs of the MM74HC125M allow multiple devices to share a data bus. The high-impedance state prevents bus contention when the buffer is disabled.
Signal Buffering for Long PCB Traces
With 7.8mA output drive, this buffer can drive long traces or multiple loads, maintaining signal integrity in digital systems.
Level Shifting Between 3.3V and 5V Systems
Operating from 2V to 6V, it can interface 3.3V microcontrollers with 5V peripherals, providing a simple level-shifting solution.
Driving LEDs and Relays
Each output can source or sink 7.8mA, sufficient for driving LEDs directly or controlling relay driver transistors in control applications.
Industrial Control Logic
With a -40°C to 85°C temperature range, it buffers signals in industrial control panels, PLCs, and automation equipment.
Memory Address Buffering
In older memory systems, this buffer isolates the address bus from the memory array, reducing capacitive loading on the CPU.
- Q: What is the logic family of the MM74HC125M?
- A: It belongs to the 74HC (High-speed CMOS) family, offering a balance of speed and power.
- 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 connection to shared buses with high-impedance state.
- Q: What is the operating voltage range?
- A: It operates from 2V to 6V, compatible with TTL and CMOS logic levels.
- Q: What package is it available in?
- A: It comes in a 14-SOIC package.
MM74HC125M.pdf
- Q: What is the logic family of the MM74HC125M?
- A: It belongs to the 74HC (High-speed CMOS) family, offering a balance of speed and power.
- 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 connection to shared buses with high-impedance state.
- Q: What is the operating voltage range?
- A: It operates from 2V to 6V, compatible with TTL and CMOS logic levels.
- Q: What package is it available in?
- A: It comes in a 14-SOIC package.