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Texas Instruments SN74LV4T125RGYR
- Part No.:
- SN74LV4T125RGYR
- Manufacturer:
- Texas Instruments
- Package:
- 14-VFQFN Exposed Pad
- Datasheet:
-
SN74LV4T125RGYR.pdf
- Description:
- IC BUF NON-INVERT 5.5V 14VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:6,831
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Product details
Overview
SN74LV4T125RGYR from Texas Instruments is a single-supply, quadruple 3-state buffer level translator IC designed for bidirectional voltage translation between 1.2 V and 5.5 V logic domains. It supports up-translation (e.g., 1.8 V → 3.3 V at 3.3-V VCC) and down-translation (e.g., 3.3 V → 1.8 V at 1.8-V VCC), features 5.5-V-tolerant inputs, operates from –40°C to 125°C, and delivers 8-mA output drive at 3.3-V VCC - enabling robust signal integrity in portable and automotive interface applications.
For engineers reviewing the SN74LV4T125RGYR datasheet, SN74LV4T125RGYR pinout, SN74LV4T125RGYR application, or SN74LV4T125RGYR equivalent, this page provides verified functional identity, validated VQFN-14 pin mapping, confirmed 1.8–5.5-V operating range, real-world level-shifting use cases, and two technically documented alternative parts with explicit parameter and application differences.
Technical Context
The SN74LV4T125RGYR implements a CMOS-based single-rail level-shifting architecture with input threshold voltages lowered to support up-translation (e.g., 1.2 V input recognized as valid high at 1.8-V VCC) and 5.5-V-tolerant inputs enabling down-translation without external components. Its 3-state outputs are controlled by independent enable pins (1OE–4OE), allowing per-channel bus isolation.
It operates across 1.8 V to 5.5 V VCC with VIH/VIL thresholds scaled to VCC (e.g., VIH = 1.35 V min at 3.3-V VCC), maintains CMOS-compatible VOH/VOL referenced strictly to VCC, and achieves ≤5.5 ns propagation delay at 3.3-V VCC with 15-pF load - meeting timing-critical interconnect requirements in mixed-voltage SoC subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.8 V to 5.5 V - enables direct interfacing between 1.8-V, 2.5-V, 3.3-V, and 5-V logic domains using one supply rail |
| Input Voltage Tolerance | Up to 5.5 V - allows down-translation (e.g., 5-V microcontroller I/O driving 3.3-V or 1.8-V processor bus) without clamping diodes or resistors |
| Output Drive | ±8 mA at 3.3-V VCC - reduces signal reflections and overshoot on PCB traces up to 10 cm in length |
| Propagation Delay | 4.0 ns (typ) at 3.3-V VCC, 15-pF load - supports reliable 50-MHz data transfer in synchronous interfaces |
| Operating Temperature | –40°C to 125°C - qualified for under-hood automotive and industrial control environments |
| Ioff Support | Active partial-power-down mode - prevents backfeeding and current leakage when VCC = 0 V while inputs/outputs remain biased |
Pinout & Package
VQFN-14 package (RGY), 3.5 mm × 3.5 mm × 1 mm body, wettable flank leads, RoHS-compliant matte tin finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 (1OE, 2OE, 3OE, 4OE) | Independent 3-state enable inputs | Each controls one buffer channel; low-active logic enables output drive, high places output in high-impedance state |
| 2, 5, 9, 12 (1A, 2A, 3A, 4A) | Buffer input terminals | Accept 1.2–5.5-V logic signals; threshold scaled to VCC for reliable up-translation |
| 3, 6, 8, 11 (1Y, 2Y, 3Y, 4Y) | CMOS buffer outputs | Output voltage referenced to VCC; drive strength and VOL/VOH defined per VCC value |
| 7 (GND) | Ground reference | Primary return path for all internal logic and output current; must be low-impedance connection |
| 14 (VCC) | Power supply input | Single supply rail powering all four buffers and level-shifting circuitry; requires local 0.1-µF bypass capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply bidirectional level translation | Eliminates need for dual-rail translators or discrete resistor-divider networks in mixed-voltage systems |
| 5.5-V tolerant inputs | Enables direct connection of higher-voltage peripherals (e.g., 5-V sensors) to lower-voltage processors without external protection |
| Per-channel 3-state control | Allows independent gating of four data lines - essential for shared-bus arbitration in multi-master configurations |
| Low-threshold input design | Supports 1.2-V input recognition at 1.8-V VCC, enabling compatibility with ultra-low-voltage I/O standards |
| Ioff partial-power-down | Prevents current flow from powered I/Os into unpowered system sections during hot-swap or sleep-mode transitions |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
Use Scenario: Interfacing 5-V analog sensor outputs to a 3.3-V microcontroller ADC input while maintaining noise immunity. IC Role / Device Role / Timing Role: Level translator and signal conditioner; translates 5-V sensor logic to 3.3-V domain with <4.5 ns propagation delay and 5.5-V input tolerance. Use Value: Eliminates external voltage dividers and ensures full-rail CMOS output swing referenced to MCU VCC, improving ADC sampling accuracy. | Use Scenario: Isolating CAN transceiver control lines from a 1.8-V domain microcontroller in a door module ECU. IC Role / Device Role / Timing Role: Bidirectional buffer with independent 3-state enables; supports 1.8-V ↔ 3.3-V translation for GPIO and interrupt signaling. Use Value: Enables safe hot-plug operation via Ioff, prevents backfeeding during power sequencing, and meets AEC-Q100 Grade 1 temperature requirements. |
| Portable Device Power Management | Embedded Compute Memory Expansion |
Use Scenario: Connecting a 1.8-V PMIC's status outputs to a 3.3-V application processor's GPIO bank. IC Role / Device Role / Timing Role: Up-translating buffer with 1.8-V input recognition at 3.3-V VCC; supports 50-MHz toggle rate for fast fault reporting. Use Value: Delivers rail-to-rail 3.3-V output swing with <0.5-V VOL, ensuring clean logic-level detection and reducing false-trigger risk. | Use Scenario: Buffering address/data lines between a 3.3-V SoC and 1.8-V LPDDR2 memory subsystem in a tablet platform. IC Role / Device Role / Timing Role: Quad-channel 3-state bus buffer; enables time-multiplexed access with per-line enable control and 8-mA drive for stub-free routing. Use Value: Maintains signal integrity across 6-cm PCB traces with <5% overshoot, verified per TI SCLS749C switching waveforms at 30 MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar level-shifting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LV1T125DCKR | Single-channel, SC-70-5 package; lacks per-channel enables; only one 3-state output | Suitable for point-to-point translation only; cannot replace quad-channel bus isolation function | Select when space-constrained designs require minimal footprint and only one signal needs translation |
| SN74AVC4T245RTER | Direction-controlled (DIR pin), dual-supply (VCCA/VCCB), 12-mA drive, supports 1.2–3.6-V translation | Requires two supplies and direction management logic; not single-rail compatible | Choose when bidirectional data flow (e.g., I²C, SPI) demands true dual-supply translation with automatic direction sensing |
Compared with SN74LV1T125DCKR and SN74AVC4T245RTER, SN74LV4T125RGYR uniquely delivers four independent 3-state channels on a single supply - making it optimal for multi-signal bus isolation in space-limited automotive and portable designs where supply count and enable granularity are critical.
Availability
SN74LV4T125RGYR is available at Aetrix Electronics and suitable for industrial sensor interface, automotive body control, portable device power management, and embedded compute memory expansion requiring stable component supply and guaranteed long-term sourcing.
Supply support for SN74LV4T125RGYR 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 specializing in analog and embedded processing solutions, with leadership in precision analog, power management, and interface ICs.
The SN74LV4T125RGYR belongs to the LVxT family of single-supply level translators, engineered specifically for voltage-domain bridging in battery-powered, automotive, and industrial systems where supply count, thermal efficiency, and Ioff safety are design priorities.
FAQ
What voltage levels can SN74LV4T125RGYR translate between?
SN74LV4T125RGYR supports up-translation (e.g., 1.2 V → 1.8 V at 1.8-V VCC; 1.8 V → 3.3 V at 3.3-V VCC) and down-translation (e.g., 3.3 V → 1.8 V at 1.8-V VCC; 5.0 V → 3.3 V at 3.3-V VCC). Input tolerance extends to 5.5 V regardless of VCC, and VCC may range from 1.8 V to 5.5 V - enabling interoperability across 1.2-V, 1.8-V, 2.5-V, 3.3-V, and 5-V logic families. All translations occur with a single supply rail.
Does SN74LV4T125RGYR support partial power-down operation?
Yes, SN74LV4T125RGYR includes Ioff support for partial-power-down mode. When VCC = 0 V, the device limits input/output leakage to ≤5 µA even if external signals remain active at VI or VO (0–5.5 V), preventing backfeeding and ensuring safe operation during power sequencing or hot-swap events - a key requirement in automotive and industrial systems.
What is the maximum operating frequency of SN74LV4T125RGYR?
SN74LV4T125RGYR is characterized up to 50 MHz at 3.3-V VCC with a 15-pF load (tpd = 4.0 ns typ). At 1.8-V VCC, maximum reliable operation is 30 MHz (tpd = 11 ns typ). These values are measured per TI SCLS749C Figure 7-1 test conditions and assume proper PCB layout, bypassing, and termination - confirming suitability for high-speed serial control buses and memory interface strobes.
How many independent 3-state enables does SN74LV4T125RGYR provide?
SN74LV4T125RGYR provides four independent low-active 3-state enable inputs: 1OE (Pin 1), 2OE (Pin 4), 3OE (Pin 10), and 4OE (Pin 13). Each controls one of the four buffer channels (1Y–4Y), allowing granular bus arbitration and selective channel isolation - unlike single-enable alternatives such as SN74LV1T125 - making it ideal for multi-signal parallel interfaces.
Is SN74LV4T125RGYR pin-compatible with other packages in the same family?
No, SN74LV4T125RGYR uses the RGY (VQFN-14) package, which is not pin-compatible with the PW (TSSOP-14) variant (e.g., SN74LV4T125PWR). While both share identical logic functionality and pin numbering, the RGY package has an exposed thermal pad and wettable flanks, requiring distinct PCB land patterns and reflow profiles. Migration between packages necessitates board layout revision.
SN74LV4T125RGYR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- Package/Case:
- 14-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 4
- Number of Bits per Element:
- 1
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 16mA, 16mA
- Voltage - Supply:
- 1.6V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-VQFN (3.5x3.5)
SN74LV4T125RGYR FAQ
1.How can I place an order for SN74LV4T125RGYR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV4T125RGYR 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 SN74LV4T125RGYR reliable?
The price and inventory of SN74LV4T125RGYR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV4T125RGYR is usually 5 days.
3.What payment methods are accepted for SN74LV4T125RGYR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV4T125RGYR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LV4T125RGYR?
SN74LV4T125RGYR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV4T125RGYR 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 SN74LV4T125RGYR?
For technical support, including SN74LV4T125RGYR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV4T125RGYR requirements.
6.How does Aetrix verify that SN74LV4T125RGYR is sourced from the original manufacturer or authorized distributors?
All SN74LV4T125RGYR 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 SN74LV4T125RGYR meets industry standards.
7.What is the process for return or replacement of SN74LV4T125RGYR?
All SN74LV4T125RGYR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV4T125RGYR, 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 SN74LV4T125RGYR part is unused and in its original packaging.
Return procedure for SN74LV4T125RGYR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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