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Texas Instruments SN74LV1T125DBVR
- Part No.:
- SN74LV1T125DBVR
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
SN74LV1T125DBVR.pdf
- Description:
- IC BUF NON-INVERT 5.5V SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:121,747
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Product details
Overview
SN74LV1T125DBVR from Texas Instruments is a single-supply CMOS buffer gate with 3-state output, designed for bidirectional logic-level translation between 1.2 V to 5.0 V domains. It supports up-translation (e.g., 1.8 V → 3.3 V at 3.3 V VCC) and down-translation (e.g., 5.0 V → 3.3 V at 3.3 V VCC), delivers ±8 mA output drive at 5 V, operates from –40°C to 125°C, and features 5.0 V-tolerant inputs - enabling use in mixed-voltage I/O interfacing for portable MCU peripherals.
For engineers reviewing the SN74LV1T125DBVR datasheet, SN74LV1T125DBVR pinout, SN74LV1T125DBVR application, or SN74LV1T125DBVR equivalent, key selection criteria include verified 1.8–5.5 V supply range, confirmed 3-state control via active-low OE, validated VIH/VIL thresholds per VCC (e.g., VIH = 0.99 V at 1.8 V VCC), and documented 50 MHz max frequency at 3.3 V - all critical for voltage-domain bridging in space-constrained industrial and telecom interfaces.
Technical Context
The SN74LV1T125DBVR implements a single noninverting buffer with tri-state output control, where logic output voltage levels are strictly referenced to VCC and input thresholds are reduced to enable reliable up-translation. Its LVxT-family architecture integrates 5.0 V-tolerant input structures and balanced CMOS push-pull outputs capable of sourcing/sinking matched currents (e.g., 7.0 mA at 3.3 V).
Functional operation depends on OE (pin 1) asserted low to enable Y (pin 4); when OE is high, Y enters high-impedance state. Input A (pin 2) accepts voltages up to 5.5 V regardless of VCC, while output swing spans 0 V to VCC - making it suitable for level-shifting between legacy 5 V logic and modern 1.8 V/2.5 V subsystems without external biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.8 V to 5.5 V - enables direct integration into mixed-supply systems without auxiliary regulators |
| Input Voltage Tolerance | Up to 5.5 V - allows connection to higher-voltage buses (e.g., 5 V I²C, UART) while powered from 1.8 V or 2.5 V |
| Output Drive | ±8 mA at 5 V VCC - sufficient to drive standard CMOS loads and reduce signal reflections on short PCB traces |
| Propagation Delay | 2.7 ns (min) / 6.5 ns (max) at 5 V, 15 pF - supports clean 50 MHz digital signaling in timing-critical paths |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial control, and base station applications |
| ESD Rating (HBM) | ±2000 V - meets JEDEC JS-001 for robust handling in automated assembly and field-replaceable modules |
| Logic Output Reference | VCC-referenced VOH/VOL - ensures compatibility with downstream CMOS inputs across all supported supply voltages |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 2.80 mm footprint, 1.6 mm body width, 1.45 mm height, lead-free (Sn) finish, moisture sensitivity level 1 (260°C reflow unlimited).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OE | Active-low output enable | Drives Y high-impedance when logic high; must not float - tie to VCC or GND via pull-up/down resistor if unused |
| 2 - A | Noninverting data input | Accepts 1.2–5.5 V signals; VIH/VIL thresholds scale with VCC (e.g., VIH = 0.99 V at 1.8 V VCC) |
| 3 - GND | Ground reference | Return path for all internal logic and output current; requires low-inductance connection to system ground plane |
| 4 - Y | 3-state buffered output | Noninverting replica of A when OE = L; high-Z when OE = H - enables bus sharing and signal isolation |
| 5 - VCC | Positive supply | Defines output logic levels and input thresholds; bypass with 0.1 µF ceramic capacitor placed ≤2 mm from pin |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply level translation | Eliminates need for dual-rail translators or discrete MOSFET solutions in 1.2–5.0 V domain bridging |
| 5.0 V-tolerant inputs | Permits direct interface to 5 V microcontrollers, sensors, or legacy peripherals without external resistive dividers |
| VCC-referenced output | Ensures VOH = VCC − 0.1 V and VOL = 0.1 V across full supply range - guarantees noise margin with downstream CMOS |
| 3-state output control | Enables multi-drop bus architectures (e.g., shared debug headers, sensor arrays) with no contention during idle states |
| Industrial temperature range | Validated operation from –40°C to +125°C supports deployment in uncontrolled environments like telecom cabinets and motor drives |
Applications
| Portable USB-C Power Delivery Interface | Industrial PLC I/O Module |
|---|---|
Use Scenario: Translating 1.8 V GPIO signals from an ARM Cortex-M4 host to 3.3 V PMIC control lines in a battery-powered IoT gateway. IC Role / Device Role / Timing Role: Single-buffer level shifter with 3-state output, enabling isolated control of multiple power rails without bus contention. Use Value: Reduces BOM count by replacing discrete FET-based translators; maintains <6.5 ns propagation delay to meet PD protocol timing budgets. |
Use Scenario: Interfacing 5 V analog-to-digital converter status flags to a 2.5 V FPGA configuration manager in a DIN-rail mounted controller. IC Role / Device Role / Timing Role: Down-translator with 5 V-tolerant input and 2.5 V CMOS-compatible output, synchronized to FPGA clock domain via OE gating. Use Value: Avoids level-shifter ICs requiring separate 5 V and 2.5 V supplies; supports –40°C startup without derating. |
| Automotive Infotainment Display Link | Server Baseboard Management Controller (BMC) |
Use Scenario: Bridging 3.3 V display timing controller outputs to 1.8 V MIPI DSI receiver inputs in a head-unit LCD driver board. IC Role / Device Role / Timing Role: Up-translator operating at 3.3 V VCC, translating 1.8 V logic thresholds to 3.3 V swing while preserving edge integrity. Use Value: Achieves <7.0 ns tpd at 3.3 V/15 pF - meets MIPI D-PHY setup/hold requirements without added termination. |
Use Scenario: Isolating 5 V SMBus alert lines from a 3.3 V BMC processor in a 1U rack server motherboard. IC Role / Device Role / Timing Role: 3-state buffer with OE controlled by BMC firmware, allowing dynamic arbitration of shared SMBus segments. Use Value: Enables hot-swap-safe communication; ±2000 V HBM rating prevents ESD-induced resets during field maintenance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar level-shifting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LV1T34DBVR | No 3-state output; fixed-drive buffer only | Cannot support bus-sharing or dynamic isolation - limited to point-to-point translation | Select when OE control is unnecessary and cost optimization is prioritized over flexibility |
| TXS0102DCUR | Two-channel auto-directional translator; no OE pin; higher ICC (10 µA vs. 1 µA) | Requires no direction control logic but lacks deterministic 3-state behavior for arbitration | Prefer for I²C/SMBus where bidirectional auto-sensing is required; avoid for synchronous parallel buses |
Compared with SN74LV1T34DBVR and TXS0102DCUR, the SN74LV1T125DBVR uniquely combines 3-state controllability, 5 V input tolerance, and sub-1 µA static current - making it optimal for deterministic, low-power, multi-drop level-shifting where firmware-driven bus arbitration is needed.
Availability
SN74LV1T125DBVR is available at Aetrix Electronics and suitable for portable electronics, industrial PLC I/O modules, and automotive infotainment systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LV1T125DBVR 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.
The SN74LV1T125DBVR belongs to TI's LVxT family of single-gate logic devices engineered specifically for voltage-domain interoperability in resource-constrained designs - targeting space-limited, mixed-supply applications where discrete translation or complex programmable logic is impractical.
FAQ
What is the maximum operating frequency of the SN74LV1T125DBVR?
The SN74LV1T125DBVR is characterized up to 50 MHz at 3.3 V VCC with 15 pF load, achieving typical propagation delay of 4.0 ns. At 5.0 V VCC, minimum tpd is 2.7 ns, supporting reliable operation in high-speed digital control loops and timing-critical peripheral interfaces where jitter-sensitive edges are required.
Does the SN74LV1T125DBVR require external pull-up or pull-down resistors on its inputs?
Yes - unused inputs of the SN74LV1T125DBVR must not be left floating. The OE pin (pin 1) must be tied to VCC or GND via a pull-up or pull-down resistor (10 kΩ recommended) to prevent oscillation and excessive current draw. Input A (pin 2) also requires termination if not actively driven, per TI's SCBA004 guidance on slow or floating CMOS inputs.
Can the SN74LV1T125DBVR translate 5 V signals down to 1.8 V logic levels?
Yes - the SN74LV1T125DBVR supports down-translation from 5.0 V inputs to 1.8 V outputs when operated at 1.8 V VCC. With VIH(min) = 0.95 V and VIL(max) = 0.57 V at 1.8 V VCC, it reliably recognizes standard 5 V TTL/CMOS HIGH/LOW states and outputs 0 V / ~1.8 V swings compatible with 1.8 V receivers.
What is the output drive capability of the SN74LV1T125DBVR at 2.5 V VCC?
At 2.5 V VCC, the SN74LV1T125DBVR provides ±5 mA output drive (IOL = 5 mA, IOH = –5 mA), sufficient to drive standard CMOS loads and moderate capacitive traces. This drive strength balances signal integrity and power efficiency for mid-range voltage translation in battery-powered and thermally constrained applications.
Is the SN74LV1T125DBVR pin-compatible with other LV1T-series devices in SOT-23-5 packaging?
Yes - the SN74LV1T125DBVR shares identical SOT-23-5 (DBV) pinout and footprint with SN74LV1T00DBVR, SN74LV1T04DBVR, and SN74LV1T34DBVR. Pin functions (OE, A, GND, Y, VCC) are consistent across this family, enabling drop-in substitution in designs where functional differences (e.g., buffer vs. inverter vs. NAND) are accounted for in firmware or layout.
SN74LV1T125DBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 1.6V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
SN74LV1T125DBVR FAQ
1.How can I place an order for SN74LV1T125DBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV1T125DBVR 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 SN74LV1T125DBVR reliable?
The price and inventory of SN74LV1T125DBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV1T125DBVR is usually 5 days.
3.What payment methods are accepted for SN74LV1T125DBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV1T125DBVR transactions.
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SN74LV1T125DBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV1T125DBVR 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 SN74LV1T125DBVR?
For technical support, including SN74LV1T125DBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV1T125DBVR requirements.
6.How does Aetrix verify that SN74LV1T125DBVR is sourced from the original manufacturer or authorized distributors?
All SN74LV1T125DBVR 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 SN74LV1T125DBVR meets industry standards.
7.What is the process for return or replacement of SN74LV1T125DBVR?
All SN74LV1T125DBVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV1T125DBVR, 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 SN74LV1T125DBVR part is unused and in its original packaging.
Return procedure for SN74LV1T125DBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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