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Texas Instruments SN74AHC1G125DBVT
- Part No.:
- SN74AHC1G125DBVT
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
SN74AHC1G125DBVT.pdf
- Description:
- IC BUF NON-INVERT 5.5V SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:38,421
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Product details
Overview
SN74AHC1G125 from Texas Instruments is a single 3-state bus buffer gate designed for level-shifting and bus isolation in low-power digital systems. It operates from 2 V to 5.5 V, delivers ±8 mA output drive at 5 V, achieves 3.8 ns typical propagation delay (tPLH/tPHL) at 5 V, and features 10 µA max ICC - enabling use in projector video data paths, server I²C bus buffering, and motor control logic interface stages.
For engineers reviewing the SN74AHC1G125 datasheet, SN74AHC1G125 pinout, SN74AHC1G125 application, or SN74AHC1G125 equivalent, key selection criteria include its 5-pin SOT-23 (DBV) package, true noninverting 3-state output behavior, guaranteed operation from –40°C to 125°C, and compatibility with mixed-voltage 3.3 V/5 V system interconnects where input overvoltage tolerance to 5.5 V enables down-translation.
Technical Context
The SN74AHC1G125 implements a CMOS-based noninverting buffer with active-low 3-state enable (OE), where Y = A when OE = L and Y = high-impedance when OE = H. Its input structure accepts voltages up to 5.5 V regardless of VCC, supporting voltage-level translation from higher to lower supply domains.
It uses balanced push-pull output drivers with 8 mA sink/source capability at 5 V, exhibits 14 pF typical power-dissipation capacitance (Cpd), and maintains stable switching performance across –40°C to 125°C with tPLH/tPHL ≤ 7 ns (max) at 5 V/15 pF load - making it suitable for noise-sensitive bus applications requiring controlled edge rates and minimal overshoot.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 5.5 V - supports direct interface between 3.3 V and 5 V logic domains without level shifters |
| Max Propagation Delay | 7 ns at 5 V/15 pF - ensures timing compliance in high-speed control buses up to ~100 MHz clock-equivalent rates |
| Output Drive Strength | ±8 mA at 5 V - sufficient to drive 50 Ω transmission lines or multiple 74AHC inputs without signal degradation |
| Input Overvoltage Tolerance | Up to 5.5 V independent of VCC - enables safe down-translation from 5 V inputs into 3.3 V or 2.5 V systems |
| Quiescent Supply Current | 10 µA max ICC - minimizes standby power in battery-backed or always-on embedded subsystems |
| Operating Temperature | –40°C to 125°C - qualified for industrial motor drives, medical patient monitors, and automotive-adjacent equipment |
| ESD Rating | ±1500 V HBM - meets standard handling requirements for assembly in non-classified environments |
Pinout & Package
SN74AHC1G125DBVT is packaged in a 5-pin SOT-23 (DBV) surface-mount package measuring 2.8 mm × 2.8 mm (body: 2.9 mm × 1.6 mm), optimized for high-density PCB layouts and automated placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OE | Active-low output enable input | Drives Y to high-impedance when high; must be pulled to VCC via resistor during power-up to prevent bus contention |
| 2 - A | Noninverting data input | Accepts logic levels up to 5.5 V regardless of VCC - enables robust interfacing with legacy 5 V peripherals |
| 3 - GND | Ground reference | Return path for all internal logic and output current; requires low-inductance connection to minimize ground bounce |
| 4 - Y | True noninverting 3-state output | Delivers A when OE = L; presents >10⁸ Ω impedance when OE = H - isolates downstream loads during bus arbitration |
| 5 - VCC | Positive supply rail | Supplies core logic and output drivers; requires local 0.1 µF ceramic bypass capacitor placed adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Wide supply voltage range | 2 V to 5.5 V operation allows single part to serve multiple rail architectures without redesign |
| Input overvoltage tolerance | Inputs withstand 5.5 V even at VCC = 2 V - eliminates need for external clamping diodes in mixed-voltage interfaces |
| Controlled output edge rate | Δt/Δv = 20 ns/V at 5 V limits ringing on unterminated traces, reducing EMI in compact enclosures |
| Low quiescent power | 10 µA max ICC enables use in energy-constrained IoT nodes and portable medical devices |
| Industrial temperature grade | –40°C to 125°C operation supports deployment in motor control cabinets and network infrastructure hardware |
Applications
| Projector Video Interface | Server I²C Bus Buffering |
|---|---|
Use Scenario: Isolating DDC/CEC control lines between HDMI source and display panel while maintaining signal integrity across varying board stack-ups. IC Role / Device Role / Timing Role: 3-state buffer providing bidirectional bus isolation and voltage translation between 3.3 V SoC and 5 V display controller. Use Value: Prevents bus contention during hot-plug events and reduces crosstalk-induced timing jitter through controlled 8 mA drive strength. | Use Scenario: Extending I²C bus length between baseboard management controller (BMC) and remote sensor modules in 1U rack servers. IC Role / Device Role / Timing Role: Unidirectional repeater buffer driving clock/data lines with matched rise/fall times to maintain I²C timing margins. Use Value: Enables reliable communication over 20 cm+ trace lengths by compensating for capacitive loading without adding protocol overhead. |
| AC Induction Motor Control Logic | Patient Monitoring Signal Conditioning |
Use Scenario: Interfacing microcontroller GPIOs to isolated gate driver enable inputs in variable-frequency drive (VFD) control boards. IC Role / Device Role / Timing Role: Level-translating buffer ensuring clean enable/disable sequencing between 3.3 V MCU and 5 V optocoupler inputs. Use Value: Guarantees monotonic transition of gate driver enables during power-up, preventing shoot-through in IGBT half-bridges. | Use Scenario: Buffering analog front-end (AFE) configuration signals from low-voltage MCU to precision ADC/DAC in bedside vital signs monitors. IC Role / Device Role / Timing Role: Low-noise digital isolator for SPI register writes, decoupling sensitive analog sections from digital switching noise. Use Value: Reduces digital switching injection into analog ground planes via high-impedance tri-state during idle periods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G125DBVT | Lower VCC range (1.65–5.5 V); 32 mA drive at 3.3 V; faster tPD (2.5 ns typ) | Better suited for 1.8 V/2.5 V systems; higher drive may increase EMI in noise-sensitive medical designs | Select when operating below 2 V or requiring higher fanout; verify layout for increased edge-rate sensitivity |
| SN74AHC1G126DBVT | Inverting logic function (Y = NOT A); identical voltage range, timing, and drive specs | Required only where signal polarity inversion is needed in bus control logic | Use only if functional inversion aligns with system architecture; otherwise, SN74AHC1G125 remains optimal |
Compared with SN74LVC1G125DBVT and SN74AHC1G126DBVT, the SN74AHC1G125DBVT provides the best balance of wide-voltage interoperability, moderate drive strength for EMI control, and noninverting signal flow - making it preferred for general-purpose bus isolation in mixed-rail industrial and medical electronics.
Availability
SN74AHC1G125DBVT is available at Aetrix Electronics and suitable for projector video interfaces, server I²C bus extension, and AC induction motor control logic requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74AHC1G125DBVT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The SN74AHC1G125 belongs to TI's AHC logic family, engineered for low-power, wide-supply-voltage bus interfacing in space-constrained industrial control and medical instrumentation systems.
FAQ
What is the maximum operating temperature for SN74AHC1G125DBVT?
The SN74AHC1G125DBVT is rated for continuous operation from –40°C to +125°C ambient temperature. This specification is validated per JEDEC JESD78 and confirmed in Section 5.3 of the official datasheet. The device maintains full electrical performance across this range, including propagation delay stability and output drive capability, making SN74AHC1G125DBVT suitable for under-hood automotive-adjacent applications and industrial motor control enclosures.
Does SN74AHC1G125DBVT support voltage-level translation?
Yes, SN74AHC1G125DBVT supports down-translation: its inputs tolerate voltages up to 5.5 V regardless of VCC, allowing 5 V signals to safely drive the A input when VCC is 3.3 V or 2.5 V. However, it does not support up-translation - the output Y cannot exceed VCC. This behavior is explicitly documented in Section 7.3 Feature Description and Table 5.3 Recommended Operating Conditions, confirming SN74AHC1G125DBVT's role as a unidirectional level shifter from higher to lower domains.
What is the recommended pull-up resistor value for OE on SN74AHC1G125DBVT?
Texas Instruments recommends tying OE to VCC via a pull-up resistor to ensure high-impedance state during power-up. The minimum value is determined by the current-sinking capability of the driving source; for standard CMOS logic, a 10 kΩ resistor is typical. Section 7.1 Overview states that "the minimum value of the resistor is determined by the current-sinking capability of the driver," and application guidance in Section 8.2.1 confirms that OE must be actively driven low to enable Y - meaning SN74AHC1G125DBVT requires no minimum pull-down strength, but OE must never float.
Can SN74AHC1G125DBVT drive a 50 Ω transmission line directly?
SN74AHC1G125DBVT can drive a 50 Ω load at 5 V with ±8 mA output capability, resulting in ~400 mV steady-state drop - acceptable for short, unterminated traces. However, its 20 ns/V input transition rate and moderate drive strength intentionally limit edge speed to suppress ringing. For reliable 50 Ω line driving beyond 5 cm, external series termination or a dedicated line driver is recommended. This behavior is intentional per Section 8.1 Application Information, which notes SN74AHC1G125DBVT is "ideal for down translation" and minimizes overshoot - confirming SN74AHC1G125DBVT's design focus on signal integrity over raw speed.
Is SN74AHC1G125DBVT pin-compatible with other 5-pin logic buffers?
SN74AHC1G125DBVT uses the industry-standard 5-pin SOT-23 (DBV) footprint with pin 1 (OE) top-left, pin 2 (A), pin 3 (GND), pin 4 (Y), and pin 5 (VCC) - matching JEDEC MO-178. It is pin-compatible with SN74LVC1G125DBVT and SN74AHC1G126DBVT in the same package, as verified in TI's Package Drawing DBV0005A and orderable part cross-reference tables. However, functional differences (e.g., inverting vs. noninverting) mean pin compatibility alone does not guarantee drop-in replacement - SN74AHC1G125DBVT must be selected specifically for true-buffer functionality.
SN74AHC1G125DBVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHC
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 1
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 8mA, 8mA
- Voltage - Supply:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
SN74AHC1G125DBVT FAQ
1.How can I place an order for SN74AHC1G125DBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHC1G125DBVT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SN74AHC1G125DBVT reliable?
The price and inventory of SN74AHC1G125DBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC1G125DBVT is usually 5 days.
3.What payment methods are accepted for SN74AHC1G125DBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHC1G125DBVT transactions.
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4.How is shipping managed for SN74AHC1G125DBVT?
SN74AHC1G125DBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHC1G125DBVT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SN74AHC1G125DBVT?
For technical support, including SN74AHC1G125DBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC1G125DBVT requirements.
6.How does Aetrix verify that SN74AHC1G125DBVT is sourced from the original manufacturer or authorized distributors?
All SN74AHC1G125DBVT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74AHC1G125DBVT meets industry standards.
7.What is the process for return or replacement of SN74AHC1G125DBVT?
All SN74AHC1G125DBVT units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC1G125DBVT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SN74AHC1G125DBVT part is unused and in its original packaging.
Return procedure for SN74AHC1G125DBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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