SN74LVC1G125QDBVRQ1 - AEC-Q100 Buffer, 3-State, SOT-23-5 | TI
MPN: SN74LVC1G125QDBVRQ1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.42 | $0.42 |
| 10 | $0.32 | $3.20 |
| 100 | $0.19 | $19.00 |
| 500 | $0.14 | $70.00 |
| 1,000 | $0.11 | $110.00 |
Drop-in alternatives for SN74LVC1G125QDBVRQ1 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
SN74LVC1G125DBVR
β Drop-Inβ In Stock
$0.0822 / Unit
View Datasheet βSN74LVC1G126QDBVRQ1
β‘ Same Packageπ Reference alternative (not in catalog)
SN74AUP1T34-Q1
β‘ Same Packageβ In Stock
$0.18 / Unit
View Datasheet β74LVC1G125Q-7
β Drop-Inπ Reference alternative (not in catalog)
74LVC1G125GV,125
β Drop-Inπ Reference alternative (not in catalog)
SN74LVC1G125QDBVRQ1 Maximum Ratings & Electrical Characteristics
| Logic Function | Single non-inverting buffer with 3-state output |
| Supply Voltage Range | 1.65 V to 5.5 V |
| Input Tolerance | 5.5 V tolerant inputs |
| Output Enable | OE active-low (output Hi-Z when OE HIGH) |
| Output Type | 3-state push-pull |
| Automotive Qualification | AEC-Q100 qualified (Q1) |
| ESD HBM | 2000 V |
| ESD MM | 200 V |
| ESD CDM | 1000 V |
| Technology | Advanced CMOS (LVC) |
| Package | SOT-23-5 (DBV) |
| Mounting Type | Surface Mount |
| Operating Temperature | [DATA_NEEDED: operating temperature range] |
| Propagation Delay | [DATA_NEEDED: propagation delay] |
| Output Drive Current | [DATA_NEEDED: output drive current] |
| RoHS Status | Compliant |
SN74LVC1G125QDBVRQ1 Pin Configuration
| Pin 1 | OE β Output enable, active low (output Hi-Z when HIGH) |
| Pin 2 | GND β Ground |
| Pin 3 | A β Data input (5.5V tolerant) |
| Pin 4 | Y β 3-state non-inverting output |
| Pin 5 | VCC β Power supply, 1.65V to 5.5V |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
SN74LVC1G125QDBVRQ1 is suitable for 6 applications: Automotive Body Electronics ECU, Mixed-Voltage Level Compatible Buffering, Instrument Cluster Display Logic, Battery Management System I/O Gating, Industrial Automation Control Logic, Telematics and Gateway Modules.
Automotive Body Electronics ECU
In body control modules and automotive ECUs, the SN74LVC1G125QDBVRQ1 buffers MCU GPIO signals driving switch inputs, relay logic, and lamp-check lines. Its AEC-Q100 qualification makes it suitable for harsh cabin and under-hood electronics where commercial logic is not permitted. The 1.65V-5.5V VCC range lets the same design re-use the part across 3.3V and 5V subsystems, and 2000V HBM ESD tolerance withstands automotive assembly handling. Placed as a 3-state line driver, the OE pin lets the MCU tri-state sensor buses during diagnostics, isolating faulty nodes without relays.
Recommended
Mixed-Voltage Level Compatible Buffering
The 5.5V-tolerant inputs of the SN74LVC1G125QDBVRQ1 make it a simple one-gate solution in mixed-voltage systems where a 5V legacy signal must gate a 3.3V rail, or vice versa. Powered at 1.65V-5.5V, the input never sees overstress even at 5V signals with VCC lowered, unlike non-tolerant LVC inputs. The 3-state output provides bus isolation during power-up sequencing - asserting OE HIGH tri-states the driver while downstream rails settle. This is frequently used to gate SPI chip-select or enable lines crossing voltage domains in automotive and industrial controllers.
Recommended
Instrument Cluster Display Logic
Cluster and dashboard modules use the SN74LVC1G125QDBVRQ1 to buffer display-backlight enables, stepper-motor pointer control signals, and indicator LED drive gating. The high output drive from TI's advanced CMOS LVC process restores slow, attenuated edges across long harness-driven PCB traces, and the push-pull 3-state output can be parked in Hi-Z when the display subsystem is powered down. AEC-Q100 qualification and customer-specific configuration control satisfy OEM change-management requirements for tier-1 cluster suppliers, while SOT-23-5 fits dense cluster PCBs.
Recommended
Battery Management System I/O Gating
In BMS slave boards, the SN74LVC1G125QDBVRQ1 gates cell-monitor daisy-chain control and diagnostic select lines. The 3-state output enables shared single-wire diagnostic buses: multiple buffers connect to one line with only one OE asserted LOW at a time, preventing contention. The 1.65V-5.5V supply matches both 3.3V monitoring ICs and 5V communication ports, and the Q1 automotive grade is required in EV traction-battery environments. The active-low OE also naturally fits watchdog-driven enable logic where a HIGH (fault) state must force Hi-Z.
Recommended
Industrial Automation Control Logic
In PLC I/O cards and factory automation boards, the buffer restores fan-out-degraded signals from counters, encoder comparators, and optocoupler outputs. Where an industrial variant is acceptable, the same-die SN74LVC1G125DBVR offers a lower-cost path; the Q1 version suits industrial equipment sharing a qualified BOM with automotive lines. The 3-state output supports bus-organized I/O backplanes where multiple cards drive a shared status line. 2000V HBM ESD robustness is valuable near connector edges where field wiring induced transients are handled upstream by TVS diodes.
Recommended
Telematics and Gateway Modules
Automotive telematics gateways use the SN74LVC1G125QDBVRQ1 to gate cellular-module PWRKEY and reset-control lines and to buffer GPIO between the main SoC and CAN/LIN transceivers. The OE pin allows the MCU to release control lines during module firmware updates, matching the 3-state bus discipline required by shared boot-strap pins. With 5.5V-tolerant inputs, the buffer safely interfaces 5V-tolerant transceiver I/O even while its own rail is 3.3V, eliminating a level-shifting stage and saving board area in space-constrained gateway designs.
Recommended
Recommended Products Summary
Engineering reference data for SN74LVC1G125QDBVRQ1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SN74LVC1G125DBVR | 74LVC1G125Q-7 | 74LVC1G125GV,125 |
|---|---|---|---|---|
| Package | SOT-23-5 (DBV) | SOT-23-5 (DBV) - same | SOT-23-5 - same | SOT-23-5 - same |
| Brand | Texas Instruments | Texas Instruments | Diodes Incorporated | Nexperia |
| Supply Voltage Range | 1.65 V to 5.5 V | 1.65 V to 5.5 V | 1.65 V to 5.5 V | 1.65 V to 5.5 V |
| Output Enable Polarity | Active-low (Hi-Z when OE HIGH) | Active-low | Active-low | Active-low |
| Automotive Qualification | AEC-Q100 (Q1) | No | Automotive-compliant | [DATA_NEEDED] |
| ESD HBM | 2000 V | 2000 V | [DATA_NEEDED] | [DATA_NEEDED] |
| Input Tolerance | 5.5 V tolerant | 5.5 V tolerant | 5.5 V tolerant | 5.5 V tolerant |
| Approx. Price (1k pcs) | $0.11 as of 2026-08-29 | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- AEC-Q100 automotive qualification (vs SN74LVC1G125DBVR)
- Automotive-compliant cross-brand second source (vs 74LVC1G125Q-7)
- Active-low OE bus discipline (vs SN74LVC1G126QDBVRQ1)
Design Notes
Do not confuse OE polarity with the SN74LVC1G126: on the G125, output is enabled when OE is LOW and Hi-Z when OE is HIGH. Substituting a G126 without checking OE logic causes permanent bus contention or tri-state. Also never leave OE floating - tie to GND via 0-ohm/10k pull-down for a permanently enabled buffer.
Place a 0.1uF ceramic decoupling capacitor within 2-3 mm of VCC (pin 5) to GND. Keep the A-to-Y trace short for clean edge propagation, and route OE away from switching nodes to avoid glitch-induced tri-stating. The SOT-23-5 footprint (DBV) is standard and allows direct placement of pin-compatible alternatives.
Use the 5.5V input tolerance deliberately: the input may be driven to 5.5V regardless of VCC, but keep VCC within 1.65V-5.5V. In mixed-voltage boards, ensure OE is not asserted from an unpowered voltage domain to avoid back-powering through input protection structures during power sequencing.
Compliance Information
Q1 suffix denotes AEC-Q100 automotive qualification per TI product page. RoHS/lead-free per standard TI SMD packaging for active catalog parts.
