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Texas Instruments SN74LV4T125PWR
- Part No.:
- SN74LV4T125PWR
- Manufacturer:
- Texas Instruments
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LV4T125PWR.pdf
- Description:
- IC BUF NON-INVERT 5.5V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:16,961
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Product details
Overview
SN74LV4T125 from Texas Instruments is a single-supply quadruple 3-state buffer level translator IC enabling 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), delivers 8 mA output drive, operates from –40°C to 125°C, and features 5.5 V-tolerant inputs - used in portable interface bridging between SoC I/O and legacy or mixed-voltage peripherals.
For engineers reviewing the SN74LV4T125 datasheet, SN74LV4T125 pinout, SN74LV4T125 application, or SN74LV4T125 equivalent, key selection criteria include its single-rail operation across 1.8–5.5 V VCC, guaranteed 50 MHz switching at 3.3-V supply, Ioff partial-power-down support, 3.5 mm × 3.5 mm VQFN and 5.0 mm × 4.4 mm TSSOP package options, and compatibility with AUP125/LVC125 logic families.
Technical Context
The SN74LV4T125 implements a CMOS-based buffer architecture with lowered input threshold voltages to enable reliable up-translation (e.g., 1.8 V input recognized at 3.3-V VCC) and overvoltage-tolerant inputs (up to 5.5 V) for down-translation. Its output logic levels are referenced strictly to VCC, ensuring consistent CMOS-compatible VOH/VOL across supply voltages.
Each of the four independent channels includes an active-low 3-state enable (OE) input and supports simultaneous high-impedance control. The device exhibits balanced rise/fall times, characterized up to 50 MHz at 3.3-V VCC with 15 pF load, and meets JESD17 latch-up immunity (>250 mA).
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 without external clamping, e.g., 5.0-V microcontroller outputs driving 2.5-V FPGA I/O. |
| Max Switching Frequency | 50 MHz at 3.3-V VCC - supports high-speed serial control buses and timing-critical GPIO expansion. |
| Output Drive Strength | ±8 mA at 3.3-V VCC - reduces signal reflections and overshoot on PCB traces up to ~10 cm in length. |
| Operating Temperature | –40°C to +125°C - qualified for automotive under-hood and industrial motor-control environments. |
| Ioff Current | ≤5 µA at VCC = 0 V - prevents backfeeding and enables safe partial power-down in hot-swap systems. |
| Propagation Delay | 4.0 ns typical (3.3-V VCC, 15 pF) - ensures sub-5-ns timing margin for 100-MHz clock domain crossings. |
Pinout & Package
TSSOP-14 (PW) package: 5.00 mm × 4.40 mm body, 0.65 mm pitch, surface-mount, lead-free (NiPdAu finish), moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | OE (Active-Low Enable) | Independent 3-state control per buffer channel; drives output to high-impedance when high. |
| 2, 5, 9, 12 | A (Input) | CMOS-compatible input with lowered VIH/VIL thresholds for up-translation; tolerant to 5.5 V. |
| 3, 6, 8, 11 | Y (Output) | CMOS output referenced to VCC; drives full rail-to-rail swing with ±8 mA capability at 3.3 V. |
| 7 | GND | Ground reference for all logic and power domains; must be low-inductance connection. |
| 14 | VCC | Single supply input (1.8–5.5 V); powers internal logic and defines output voltage levels. |
Key Features
| Feature | Design Value |
|---|---|
| Single-Supply Level Translation | Eliminates need for dual-rail translators or discrete resistor networks - simplifies BOM and layout for mixed-voltage I/O bridging. |
| 5.5-V Input Tolerance | Enables direct connection of 5-V legacy peripherals to 1.8-V/2.5-V processors without external protection diodes or level-shifter ICs. |
| Low-Threshold Input Circuitry | Supports 1.2-V input recognition at 1.8-V VCC and 1.8-V input at 3.3-V VCC - critical for battery-powered sensor node interfaces. |
| Ioff Partial-Power-Down Support | Prevents current leakage through powered-off sections during system sleep modes - essential for ultra-low-power IoT designs. |
| 3-State Output Control | Four independent OE pins allow selective bus isolation - avoids contention on shared data lines in multi-master configurations. |
Applications
| Smartphone Baseband Interface | Automotive ADAS Sensor Hub |
|---|---|
|
Use Scenario: Interfacing 1.8-V MIPI D-PHY transceivers with 3.3-V camera module power domain. IC Role / Device Role / Timing Role: Bidirectional level translator and signal buffer for clock/data lanes between baseband SoC and image sensor. Use Value: Enables 1.8-V logic signaling integrity while maintaining 3.3-V power domain compliance - eliminates need for separate level-shifting ICs per lane. |
Use Scenario: Connecting 5-V radar sensor outputs to 2.5-V automotive MCU GPIOs in parking assist systems. IC Role / Device Role / Timing Role: Down-translator and noise-immune buffer for analog-digital interface signals in ECU sensor aggregation. Use Value: 5.5-V input tolerance and –40°C to 125°C operation ensure robustness against automotive load-dump transients and thermal cycling. |
| Industrial PLC I/O Expansion | Server BMC Management Bus |
|
Use Scenario: Extending 3.3-V ARM-based controller GPIOs to drive 5-V optocoupler-isolated field I/O modules. IC Role / Device Role / Timing Role: Unidirectional up-translator and current-boosting buffer for digital output control lines. Use Value: ±8 mA drive strength ensures reliable turn-on of optocoupler LEDs without external transistor stages. |
Use Scenario: Bridging 1.8-V server CPU SMBus controllers to 3.3-V legacy thermal sensor and fan controller ICs. IC Role / Device Role / Timing Role: Protocol-transparent voltage translator for I²C/SMBus clock and data lines. Use Value: Sub-5 ns propagation delay preserves SMBus timing margins at 100 kHz and 400 kHz rates - no clock stretching required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar level translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LV1T125 | Single-channel version in SOT-23-6 or SC-70-6; identical electrical specs but lower pin count and drive (±8 mA same). | Suitable only for point-to-point translation; lacks quad-channel density for bus-wide translation. | Select when space-constrained and only one signal requires translation - saves PCB area vs. quad solution. |
| TXS0104E | Auto-direction sensing, push-pull outputs, higher ICC (up to 20 µA static), no Ioff support, 1.65–3.6 V VCC only. | Designed for bidirectional data buses (e.g., I²C); not suitable for unidirectional buffered control signals. | Choose only for true bidirectional open-drain protocols; avoid for buffered GPIO or clock distribution where direction control is explicit. |
Compared with SN74LV1T125 and TXS0104E, the SN74LV4T125 provides optimal balance of channel density, wide VCC range (1.8–5.5 V), Ioff safety, and deterministic 3-state control - making it preferred for multi-signal, mixed-voltage, and partial-power-down embedded systems.
Availability
SN74LV4T125 is available at Aetrix Electronics and suitable for smartphone baseband interfaces, automotive ADAS sensor hubs, and industrial PLC I/O expansion requiring stable component supply across extended temperature and mixed-voltage operating conditions.
Supply support for SN74LV4T125 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 connectivity technologies with over 90 years of innovation in industrial, automotive, and consumer electronics.
The SN74LV4T125 belongs to TI's LVxT family of single-supply level translators, engineered specifically for low-power, high-reliability voltage-domain bridging in portable, automotive, and industrial systems where board space and supply flexibility are critical.
FAQ
What is the maximum input voltage the SN74LV4T125 can tolerate?
The SN74LV4T125 supports input voltages up to 5.5 V regardless of VCC setting - enabling robust down-translation from 5-V sources to lower-voltage domains (e.g., 5.0 V → 1.8 V at 1.8-V VCC). This rating is absolute maximum and applies across the full operating temperature range (–40°C to 125°C), verified per JEDEC JESD78.
Does the SN74LV4T125 support up-translation from 1.2 V to 1.8 V?
Yes, the SN74LV4T125 explicitly supports 1.2-V to 1.8-V up-translation when operated at 1.8-V VCC, as confirmed in the datasheet's "Up Translation" table. Its lowered input threshold circuitry ensures reliable recognition of 1.2-V VIH at 1.8-V supply - critical for interfacing ultra-low-power sensors.
What is the output drive capability of the SN74LV4T125 at 2.5-V VCC?
At 2.5-V VCC, the SN74LV4T125 delivers ±5 mA output drive (IOL = 5 mA, IOH = –5 mA), as specified in Section 6.3 Recommended Operating Conditions. This ensures sufficient current to drive standard CMOS loads and moderate PCB trace capacitance without signal degradation.
Can the SN74LV4T125 operate with VCC = 1.6 V?
No - the SN74LV4T125 has a minimum recommended VCC of 1.8 V, per Section 6.3. While absolute maximum ratings list –0.5 V to 7.0 V, functional operation below 1.8 V is not characterized or guaranteed; VIH/VIL thresholds and output drive degrade outside the 1.8–5.5 V operating range.
Is the SN74LV4T125 pin-compatible with SN74LVC125A?
No - the SN74LV4T125 uses a different pinout than SN74LVC125A. Although both are quadruple 3-state buffers, SN74LV4T125 places GND at Pin 7 and VCC at Pin 14 in TSSOP-14, whereas SN74LVC125A uses Pin 1 (GND) and Pin 14 (VCC) in SOIC-14. Layout redesign is required for substitution.
SN74LV4T125PWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- 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-TSSOP
SN74LV4T125PWR FAQ
1.How can I place an order for SN74LV4T125PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV4T125PWR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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The price and inventory of SN74LV4T125PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV4T125PWR is usually 5 days.
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For technical support, including SN74LV4T125PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV4T125PWR requirements.
6.How does Aetrix verify that SN74LV4T125PWR is sourced from the original manufacturer or authorized distributors?
All SN74LV4T125PWR 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 SN74LV4T125PWR meets industry standards.
7.What is the process for return or replacement of SN74LV4T125PWR?
All SN74LV4T125PWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV4T125PWR, 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 SN74LV4T125PWR part is unused and in its original packaging.
Return procedure for SN74LV4T125PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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