74AHCT1G125DBVT Texas Instruments Integrated Circuit (SOT23 (5-Pin)) In Stock
Texas Instruments 74AHCT1G125DBVT is a single-gate AHCT-family 3-state buffer and line driver operating from a 5 V supply with CMOS-compatible inputs. It features output enable control for bus sharing and propagation delays under 10 ns in a tiny 5-pin SOT-23 package. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- 74AHCT1G125DBVT Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of 74AHCT1G125DBVT?
- Single-gate 3-state output buffer accepting CMOS/TTL inputs on a 5 V rail for flexible bus interface designs
- AHCT-family propagation delay under 10 ns enabling high-speed signal routing in microcontroller and FPGA I/O expansion
- Ultra-compact 5-pin SOT-23 package occupying under 5 mm² PCB area for space-constrained logic interfacing
What is 74AHCT1G125DBVT used for?
The 74AHCT1G125DBVT is used as a unidirectional bus buffer in 5 V microcontroller systems, FPGA I/O expanders, and multi-master bus architectures where output enable control is needed to prevent bus contention. Its AHCT-family speed and 5 V supply compatibility also make it effective as a level-translating buffer between 5 V legacy logic and 3.3 V CMOS systems when paired with a pull-up to the lower rail.
What are the specifications of 74AHCT1G125DBVT?
| 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 74AHCT1G125DBVT datasheet?
74AHCT1G125DBVT Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for 74AHCT1G125DBVT?
Compatible alternatives and drop-in replacements for 74AHCT1G125DBVT:
Bus Driver, AHCT/VHCT/VT Series, 1-Func, 1-Bit, True Output, CMOS, PDSO5
Bus Driver, AHCT/VHCT/VT Series, 1-Func, 1-Bit, True Output, CMOS, PDSO5
Bus Driver, AHCT/VHCT/VT Series, 1-Func, 1-Bit, True Output, CMOS, PDSO5
Bus Driver, AHCT/VHCT/VT Series, 1-Func, 1-Bit, True Output, CMOS, PDSO5
Bus Driver, AHCT/VHCT/VT Series, 1-Func, 1-Bit, True Output, CMOS, PDSO5
Bus Driver, AHCT/VHCT/VT Series, 1-Func, 1-Bit, True Output, CMOS, PDSO5
Bus Driver, AHCT/VHCT/VT Series, 1-Func, 1-Bit, True Output, CMOS, PDSO
Frequently Asked Questions
How does the 3-state output of the 74AHCT1G125DBVT enable safe bus sharing between multiple drivers?
When the active-low output enable (OE) pin is driven high, the 74AHCT1G125DBVT output enters a high-impedance state, electrically disconnecting the driver from the bus. Only one driver with OE asserted low can place a logic level on the shared line at any time, preventing bus contention currents that could exceed the 25 mA absolute maximum output current rating and damage devices.
Can the 74AHCT1G125DBVT buffer a 3.3 V logic output to drive 5 V TTL-compatible loads?
Yes. The AHCT input threshold accepts CMOS signal levels from a 3.3 V source because the VIH minimum is 3.15 V (70% of 4.5 V), and the output switches fully to 5 V logic levels referenced to the 5 V VCC supply. This makes the 74AHCT1G125DBVT a single-component 3.3 V-to-5 V logic level translator for unidirectional signals at speeds up to 100 MHz.
For a PCB with limited routing space, what are the physical dimensions of the SOT-23 5-pin package used by the 74AHCT1G125DBVT?
The 5-pin SOT-23 package (DBVT footprint) has a body measuring approximately 2.9 mm × 1.6 mm with a pin pitch of 0.95 mm. The total mounted area including pads is under 10 mm², allowing the buffer to be placed in tight spaces next to connectors or within differential-pair routing gaps on a 4-layer PCB without violating clearance rules.
What propagation delay and output drive strength does the 74AHCT1G125DBVT provide at 5 V?
At a 5 V supply the typical propagation delay tpd is approximately 5.5 ns with a 50 pF load, and the output can source or sink up to 8 mA at the specified VOH/VOL levels. This combination of low delay and 8 mA drive capability allows the buffer to cleanly drive 50 Ω transmission-line stubs or multiple CMOS gate inputs without signal integrity degradation.
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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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