SN74HC125N-NG Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
The SN74HC125N-NG is a quad non-inverting bus buffer with 3-state outputs, supporting 4 independent 1-bit buffer channels in a 14-pin DIP package. It operates across a 2 V to 6 V supply range with high-speed CMOS switching compatible with TTL input levels. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 14
- Lifecycle
- ACTIVE
- Datasheet
- SN74HC125N-NG Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 4 independent non-inverting buffer channels with 3-state outputs for bus isolation and expansion
- 2 V to 6 V wide supply range compatible with both 3.3 V and 5 V CMOS and TTL logic systems
- 14-pin DIP package enables easy prototyping and breadboard-based digital logic development
- High-speed CMOS switching with low propagation delay for bus driving in embedded systems
Applications
The SN74HC125N-NG is a general-purpose quad bus buffer widely used in microcontroller and microprocessor bus expansion, data bus isolation, and logic-level interfacing between 3.3 V and 5 V digital systems. Its 3-state output control allows multiple devices to share a common bus without contention, making it suitable for address/data bus demultiplexing in embedded designs, FPGA I/O expansion, and board-level signal routing. The 14-pin DIP package also makes it a popular choice for prototyping, educational electronics, and legacy system retrofits requiring through-hole components.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74HC125N-NG:
Frequently Asked Questions
How does the 3-state output of the SN74HC125N-NG enable shared bus operation in a microcontroller design?
The SN74HC125N-NG provides 3-state outputs on all 4 buffer channels, allowing each channel to be driven to a high-impedance state when its output-enable pin is deasserted. This lets multiple SN74HC125N-NG devices share a common 8-bit or 16-bit data bus without contention, which is essential in microcontroller-based systems where several peripherals at different address spaces must drive the same bus lines.
What supply voltage range does the SN74HC125N-NG support, and does it work in mixed 3.3 V and 5 V systems?
The SN74HC125N-NG operates from 2 V to 6 V, making it compatible with both 3.3 V and 5 V digital logic systems including CMOS and TTL families. In mixed-voltage boards, the device can be powered at 5 V while its inputs accept 3.3 V CMOS signals, enabling level translation or bus expansion between modern 3.3 V microcontrollers and 5 V legacy peripherals without additional level-shifter ICs.
For which prototyping and development scenarios is the SN74HC125N-NG in a 14-pin DIP package most convenient?
The SN74HC125N-NG in the 14-pin DIP package is most convenient for breadboard prototyping, educational electronics labs, and development kits where through-hole components are preferred over surface-mount alternatives. The 2.54 mm pin pitch allows direct insertion into standard breadboards and perfboards, letting designers quickly validate bus buffer, signal isolation, and 3-state bus configurations during early hardware prototyping before committing to a PCB layout.
How many buffer channels does the SN74HC125N-NG contain, and what bit width does each channel handle?
The SN74HC125N-NG contains 4 independent buffer channels, each handling 1 bit of data with a non-inverting transfer function and 3-state output control. This configuration means a single 14-pin device can expand or buffer 4 data lines simultaneously, making it suitable for nibble-wide bus interfaces, 4-bit parallel data paths, and address line buffering in 8-bit microprocessor systems.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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