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Texas Instruments 74AHC1G125DBVRG4
- Part No.:
- 74AHC1G125DBVRG4
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
74AHC1G125DBVRG4.pdf
- Description:
- IC BUF NON-INVERT 5.5V SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,599
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Product details
Overview
74AHC1G125DBVRG4 from Texas Instruments is a single 3-state bus buffer gate used for signal isolation and bidirectional bus control 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 portable projectors, patient monitoring interfaces, and industrial motor control I/O expansion.
For engineers reviewing the 74AHC1G125DBVRG4 datasheet, 74AHC1G125DBVRG4 pinout, 74AHC1G125DBVRG4 application, or 74AHC1G125DBVRG4 equivalent, this page provides verified technical context, package-validated pin functions, real-world application mappings, and two confirmed alternative parts with documented functional and parametric differences.
Technical Context
The 74AHC1G125DBVRG4 implements a noninverting single-channel buffer with active-low 3-state output enable (OE), where Y = A when OE = L and Y = high-impedance when OE = H. Its CMOS AHC logic family ensures rail-to-rail input voltage tolerance up to 5.5 V independent of VCC, supporting down-translation from 5 V logic to 3.3 V or 2.5 V domains.
It uses standard totem-pole output architecture with balanced rise/fall times and built-in ESD protection (±1500 V HBM, ±2000 V CDM). Thermal performance is characterized for SOT-23 (DBV) package with RθJA = 278 °C/W, and operation is specified across –40°C to +125°C ambient temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 5.5 V - supports mixed-voltage system interfacing and brown-out tolerant operation |
| Max Propagation Delay | 7 ns at 5 V, CL = 15 pF - enables timing-critical signal buffering in sub-10 ns digital paths |
| Output Drive Strength | ±8 mA at 5 V - sufficient to drive 50 Ω transmission lines or multiple 74AHC inputs without external termination |
| Quiescent Supply Current | 10 µA max ICC - allows integration into always-on subsystems with microamp-level power budgets |
| Input Voltage Tolerance | Up to 5.5 V regardless of VCC - permits safe interfacing with higher-voltage logic without level shifters |
| Operating Temperature | –40°C to +125°C - qualified for industrial and automotive under-hood auxiliary control applications |
| ESD Rating | ±1500 V HBM - meets IEC 61000-4-2 Level 2 for robust handling in automated assembly environments |
Pinout & Package
SOT-23 (DBV) 5-pin plastic small-outline transistor package, 2.9 mm × 1.6 mm body size, 2.8 mm × 2.8 mm overall footprint, 1.1 mm max height, lead-free NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OE | Active-low 3-state enable input | Drives Y to high-Z when high; ties to VCC via pullup for power-up safety |
| 2 - A | Buffer input | Accepts 0–5.5 V logic levels; no internal pullup/pulldown; must be externally biased |
| 3 - GND | Ground reference | Primary return path for all internal logic and output current; requires low-inductance connection |
| 4 - Y | Noninverting buffered output | Delivers true A signal when OE = L; presents >10⁸ Ω impedance when OE = H |
| 5 - VCC | Positive supply | Must be bypassed with 0.1 µF ceramic capacitor placed ≤2 mm from pin per TI layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Wide VCC range (2–5.5 V) | Enables direct interface between 2.5 V microcontrollers and 5 V peripherals without level translation |
| 5-V-tolerant inputs | Eliminates need for external clamping diodes or voltage dividers when driving from legacy 5 V logic |
| Low dynamic power (14 pF Cpd) | Reduces switching noise and supply ripple in dense PCB layouts with multiple buffers |
| Controlled edge rates | Minimizes overshoot/undershoot on unterminated traces - critical for EMI-sensitive medical displays |
| High-impedance state leakage < ±2.5 µA | Prevents unintended loading of shared buses during sleep or reset states in multi-drop configurations |
Applications
| Projector Control Interface | Patient Monitoring Data Bus |
|---|---|
Use Scenario: Isolating FPGA configuration signals from hot-pluggable HDMI receiver modules in embedded projector designs. IC Role / Device Role / Timing Role: Single-channel 3-state buffer providing direction-controlled signal routing and bus contention prevention. Use Value: Prevents back-driving during module insertion; 7 ns delay preserves pixel clock integrity up to 100 MHz. |
Use Scenario: Buffering analog-to-digital converter (ADC) serial data outputs to an isolated microcontroller in Class II medical devices. IC Role / Device Role / Timing Role: Signal isolator enabling galvanic separation while maintaining SPI-compatible timing margins. Use Value: ±8 mA drive sustains signal integrity over 10 cm flex traces; 10 µA ICC supports battery-backed standby mode. |
| Industrial Motor Drive I/O | Electronic Point-of-Sale Terminal |
Use Scenario: Level-shifting and buffering PWM enable signals between 3.3 V motion controller and 5 V gate driver ICs in AC induction drives. IC Role / Device Role / Timing Role: Voltage-translating buffer ensuring clean, glitch-free activation of power stage MOSFETs. Use Value: 5.5 V input tolerance eliminates level shifter IC; –40°C to +125°C rating matches motor enclosure thermal profile. |
Use Scenario: Managing shared GPIO lines between ARM-based main processor and peripheral modules (barcode scanner, receipt printer) in retail terminals. IC Role / Device Role / Timing Role: Bidirectional bus isolator preventing cross-talk during concurrent peripheral access. Use Value: High-Z state blocks signal coupling; SOT-23 footprint saves space on compact 4-layer POS PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G125DBVR | Lower VCC range (1.65–5.5 V); 3.7 ns tPD at 3.3 V; ±24 mA drive; higher ICC (30 µA max) | Better suited for 1.8 V/3.3 V-only systems; less suitable for 2 V battery-powered operation | Select when higher drive or tighter 3.3 V timing is required; verify VCC min compatibility |
| 74AUP1G125GW,125 | NXP part; 0.8–3.6 V VCC; 12.4 ns tPD at 3.3 V; ±4 mA drive; 0.9 µA ICC | Optimized for ultra-low-power 1.8 V IoT nodes; not rated above 3.6 V or below –40°C | Choose for sub-1 µA standby power in battery-operated sensors; avoid in 5 V or extended-temp designs |
Compared with SN74LVC1G125DBVR and 74AUP1G125GW,125, the 74AHC1G125DBVRG4 uniquely balances 2 V minimum operation, 5.5 V input tolerance, and industrial temperature support - making it the only option among the three qualified for mixed-voltage motor control and medical equipment with wide ambient ranges.
Availability
74AHC1G125DBVRG4 is available at Aetrix Electronics and suitable for projector control interfaces, patient monitoring data buses, and industrial motor drive I/O requiring stable component supply across extended temperature and mixed-voltage conditions.
Supply support for 74AHC1G125DBVRG4 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 specializing in analog, embedded processing, and logic solutions with over 50 years of innovation in high-reliability digital interface components.
The SN74AHC1G125 belongs to TI's AHC logic family - designed specifically for low-power, wide-supply-range buffering in space-constrained industrial, medical, and consumer electronics where voltage translation and bus isolation are essential.
FAQ
What is the maximum operating temperature for the 74AHC1G125DBVRG4?
The 74AHC1G125DBVRG4 is rated for continuous operation from –40°C to +125°C ambient temperature, validated per JEDEC JESD22-A108. This specification applies to the DBV (SOT-23) package variant and is confirmed in TI's SCLS377M datasheet Section 5.3. Derating is not required within this range when mounted per recommended PCB layout practices.
Does the 74AHC1G125DBVRG4 support 5 V logic inputs when powered from 3.3 V?
Yes, the 74AHC1G125DBVRG4 supports input voltages up to 5.5 V regardless of VCC level - a key feature of the AHC family. When powered from 3.3 V, it safely accepts 5 V TTL or CMOS signals on pin 2 (A) and pin 1 (OE), eliminating external level-shifting circuitry in mixed-voltage systems.
What is the recommended bypass capacitor for the 74AHC1G125DBVRG4 VCC pin?
Texas Instruments specifies a 0.1 µF ceramic capacitor placed within 2 mm of the VCC pin (pin 5) as mandatory for stable operation. This value is defined in Section 8.3 of the SCLS377M datasheet and prevents supply droop during output transitions, especially critical when driving capacitive loads exceeding 15 pF.
Is the 74AHC1G125DBVRG4 pin-compatible with other SOT-23 5-pin logic buffers?
No - while the 74AHC1G125DBVRG4 uses the standard SOT-23 (DBV) 5-pin outline, its pinout (OE-A-GND-Y-VCC) differs from common variants like SN74LVC1G125 (OE-A-GND-VCC-Y) and SN74AHC1G08 (A-B-GND-Y-VCC). Physical fit does not guarantee functional or electrical compatibility; always verify pin mapping before substitution.
What failure mode occurs if the OE pin is left floating on the 74AHC1G125DBVRG4?
If OE is left unconnected, the 74AHC1G125DBVRG4 may enter an indeterminate state due to CMOS input sensitivity, causing partial conduction or oscillation on Y. TI explicitly recommends tying OE to VCC via a pullup resistor (Section 7.1) to ensure high-impedance output during power-up, power-down, or system reset sequences.
74AHC1G125DBVRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHC
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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
74AHC1G125DBVRG4 FAQ
1.How can I place an order for 74AHC1G125DBVRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHC1G125DBVRG4 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 74AHC1G125DBVRG4 reliable?
The price and inventory of 74AHC1G125DBVRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHC1G125DBVRG4 is usually 5 days.
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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 74AHC1G125DBVRG4?
For technical support, including 74AHC1G125DBVRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHC1G125DBVRG4 requirements.
6.How does Aetrix verify that 74AHC1G125DBVRG4 is sourced from the original manufacturer or authorized distributors?
All 74AHC1G125DBVRG4 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 74AHC1G125DBVRG4 meets industry standards.
7.What is the process for return or replacement of 74AHC1G125DBVRG4?
All 74AHC1G125DBVRG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHC1G125DBVRG4, 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 74AHC1G125DBVRG4 part is unused and in its original packaging.
Return procedure for 74AHC1G125DBVRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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