74AHC1G125DBVT Texas Instruments Integrated Circuit (SOT23 (5-Pin)) In Stock
74AHC1G125DBVT is a single 3-state buffer and line driver from Texas Instruments operating across a 2 V to 5.5 V supply range with AHC-speed performance for mixed-voltage signal buffering. The device features an active-low output enable pin that places the output in a high-impedance state, enabling bus-sharing in multi-master designs. Housed in a tiny 5-pin SOT-23 package suited for space-constrained PCB designs. From competitive pricing in stock worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- 74AHC1G125DBVT Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of 74AHC1G125DBVT?
- Wide 2 V to 5.5 V supply range enables direct interfacing between 3.3 V and 5 V logic domains without level-shift circuitry
- 3-state output with active-low enable allows multiple drivers on a shared bus, preventing bus contention in multi-master systems
- 5-pin SOT-23 package occupies under 3 mm² PCB area, ideal for ultra-compact IoT nodes, wearables, and portable devices
What is 74AHC1G125DBVT used for?
74AHC1G125DBVT serves as a bus isolator and line driver in microcontroller-to-peripheral interfaces where 3.3 V MCUs share a signal line with 5 V legacy devices. Its 3-state output makes it ideal for I2C or SPI bus expansion circuits where only one master drives the bus at a time, preventing signal contention across multiple board sections. The device is also used in address decoding buffers on memory expansion boards and in industrial I/O modules requiring tri-state control over bidirectional data lines.
What are the specifications of 74AHC1G125DBVT?
| YTEOL | EYTEOL |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Country of Origin | Country of Origin |
Where can I find the 74AHC1G125DBVT datasheet?
74AHC1G125DBVT Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for 74AHC1G125DBVT?
Compatible alternatives and drop-in replacements for 74AHC1G125DBVT:
Bus Driver, AHC/VHC/H/U/V Series, 1-Func, 1-Bit, True Output, CMOS, PDSO5
Bus Driver, AHC/VHC/H/U/V Series, 1-Func, 1-Bit, True Output, CMOS, PDSO5
Bus Driver, AHC/VHC/H/U/V Series, 1-Func, 1-Bit, True Output, CMOS, PDSO5
Bus Driver, AHC/VHC/H/U/V Series, 1-Func, 1-Bit, True Output, CMOS, PDSO5
Bus Driver, AHC/VHC/H/U/V Series, 1-Func, 1-Bit, True Output, CMOS, PDSO5
Bus Driver, AHC/VHC/H/U/V Series, 1-Func, 1-Bit, True Output, CMOS, PDSO5
Bus Driver, AHC/VHC/H/U/V Series, 1-Func, 1-Bit, True Output, CMOS, PDSO5
Bus Driver, AHC/VHC/H/U/V Series, 1-Func, 1-Bit, True Output, CMOS, PDSO5
Frequently Asked Questions
How does 74AHC1G125DBVT handle level translation between a 3.3 V MCU and a 5 V peripheral?
74AHC1G125DBVT accepts input signals valid at 3.3 V supply levels while driving outputs compatible with 5 V CMOS thresholds when powered at 5 V. Its 2 V to 5.5 V operating range means a single part bridges 3.3 V logic outputs from a microcontroller to 5 V bus peripherals, replacing discrete resistor dividers or dedicated level-shift ICs in many simple unidirectional interfaces.
What propagation delay can be expected from 74AHC1G125DBVT at 3.3 V for time-critical bus signals?
74AHC1G125DBVT achieves a typical propagation delay of approximately 4 ns to 6 ns at 3.3 V supply. This AHC-family speed is sufficient for SPI buses running at up to 50 MHz and ensures the buffered signal arrives within setup-time margins at receiving devices even over traces of several centimeters.
When would a designer choose 74AHC1G125DBVT over a bidirectional level translator for a sensor bus?
74AHC1G125DBVT is preferable when the signal direction is fixed and unidirectional, such as a clock or chip-select line driven only by the MCU. Its simpler 3-state buffer costs less and occupies a smaller 5-pin SOT-23 footprint than a bidirectional translator, making it the lower-cost choice for one-way 2 V to 5.5 V signal paths in sensor interface boards.
How does the 3-state enable pin allow multiple 74AHC1G125DBVT devices to share a single PCB trace?
Driving the active-low output-enable pin high places the 74AHC1G125DBVT output into high-impedance mode, disconnecting it from the shared trace. By sequencing the enable pins so only one buffer drives at a time, designers can multiplex 2 to 4 signal sources onto a single PCB net, each source using its own 74AHC1G125DBVT to prevent bus contention at 3.3 V or 5 V logic levels.
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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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