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Texas Instruments SN74LV4T125PWREP
- Part No.:
- SN74LV4T125PWREP
- Manufacturer:
- Texas Instruments
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LV4T125PWREP.pdf
- Description:
- ENHANCED-PRODUCT FOUR-BIT FIXED-
- Quantity:
- Payment:
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Product details
Overview
SN74LV4T125PWREP from Texas Instruments is a radiation-hardened, single-supply quadruple 3-state buffer translator enabling bidirectional CMOS logic level shifting across 1.8V–5.5V domains. It performs Y = A Boolean function per channel, supports up-translation (e.g., 1.2V→1.8V, 1.8V→3.3V) and down-translation (e.g., 5.0V→3.3V, 3.3V→1.8V), and delivers ≤10.2 ns propagation delay at 5V with 15pF load - used in space-grade interface bridging between mixed-voltage subsystems.
For engineers reviewing the SN74LV4T125PWREP datasheet, SN74LV4T125PWREP pinout, SN74LV4T125PWREP application, or SN74LV4T125PWREP equivalent, this page provides verified electrical specs, TSSOP-14 pin mapping, translation capability boundaries, thermal resistance data (RθJA = 147.7°C/W), and validated alternatives for radiation-tolerant digital signal conditioning in avionics and satellite bus architectures.
Technical Context
This device implements four independent, non-inverting buffers with active-low 3-state output enables (OE), each supporting LVxT enhanced input thresholds for reliable up/down translation without external biasing. Its inputs tolerate up to 5.5V regardless of VCC, while outputs are referenced strictly to VCC and compliant with 1.8V/2.5V/3.3V/5V CMOS logic levels.
Operation spans –55°C to +125°C with latch-up immunity >250 mA (JESD17), 20 ns/V input transition rate limit, and balanced drive strength (±15 mA at 3.3V). The 14-pin TSSOP package features GND and VCC on opposite edges to minimize supply noise coupling across channels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.6 V to 5.5 V - enables direct interface between legacy 5V systems and modern low-voltage FPGAs or microcontrollers without level-shifter ICs. |
| Input Voltage Tolerance | Up to 5.5 V - allows connection of higher-voltage signals (e.g., 5V UART, 3.3V SPI) to lower-VCC outputs without clamping diodes or resistive dividers. |
| Propagation Delay (tPLH/tPHL) | 5.3 ns min / 10.2 ns max at 5V, CL = 15pF - ensures sub-100 MHz digital signal integrity in high-speed control paths. |
| Output Drive Strength | ±15 mA at 3.3V VCC - sufficient to drive multiple CMOS loads (e.g., 10+ 74LVC inputs) or moderate PCB trace capacitance without waveform degradation. |
| Operating Temperature | –55°C to +125°C - qualified for extended-life deployment in spacecraft power management, payload telemetry, and onboard computer I/O expansion. |
| ESD Rating (HBM) | ±2000 V - meets MIL-PRF-38535 Class V requirements for handling robustness in cleanroom assembly and field maintenance. |
| Quiescent Current (ICC) | 2 µA typical at 25°C - minimizes standby power in battery-backed or thermally constrained avionics modules. |
Pinout & Package
PW package: 14-pin TSSOP (5 mm × 6.4 mm body with 5 mm × 4.4 mm footprint), lead pitch 0.65 mm, RoHS-compliant matte tin finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Active-low output enable (per channel) | Drives corresponding Y output to high-impedance when HIGH; enables independent channel gating for bus arbitration or power sequencing. |
| 1A–4A | Buffer input (per channel) | Accepts LVxT-enhanced logic inputs - VIH as low as 1.1 V (at 1.65V VCC) - enabling reliable recognition of sub-1.8V signals from ultra-low-power sensors. |
| 1Y–4Y | Non-inverting buffered output (per channel) | Outputs referenced to VCC; VOH ≥ VCC−0.1 V ensures full rail-swing compatibility with downstream 1.8V–5V receivers. |
| GND (Pin 7) | Ground reference | Common return path for all four channels; placement adjacent to VCC (Pin 14) minimizes ground bounce during simultaneous switching. |
| VCC (Pin 14) | Positive supply | Single supply sets both output logic levels and input threshold voltages - eliminates need for dual-rail supplies in mixed-voltage designs. |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply level translation | Eliminates external voltage translators or resistor networks - reduces BOM count and layout area in radiation-hardened PCBs. |
| 5.5V-tolerant inputs | Enables direct connection of 5V legacy peripherals (e.g., RS-232 transceivers, EEPROMs) to 1.8V/2.5V system-on-chip I/O without risk of overvoltage damage. |
| 150 Mbps data rate support | Validated at 5V/3.3V VCC - suitable for high-throughput telemetry links, FPGA configuration buses, and real-time sensor aggregation. |
| Latch-up immunity >250 mA | Complies with JESD17 Class II - critical for operation in high-radiation environments where single-event latch-up could cause system reset or burnout. |
| Extended temperature range | –55°C to +125°C operation with full parametric guarantee - certified for use in orbital thermal cycling and deep-space probe electronics. |
Applications
| Avionics Data Bus Interface | Satellite Payload Power Sequencing |
|---|---|
|
Use Scenario: Bridging 5V MIL-STD-1553 bus controllers to 3.3V FPGA-based flight computers in launch vehicle guidance systems. IC Role / Device Role / Timing Role: Level-translating buffer isolating voltage domains while preserving signal timing integrity and enabling hot-swap-safe bus arbitration via 3-state control. Use Value: Eliminates discrete resistor-divider networks and associated timing skew; maintains <10 ns channel-to-channel skew across all four buffers under radiation exposure. |
Use Scenario: Enabling/disabling power rails to scientific instruments (e.g., star trackers, spectrometers) based on command telemetry received at 1.8V logic levels. IC Role / Device Role / Timing Role: Quad-channel 3-state gate controlling enable lines to PMICs and DC-DC converters, with independent OE pins synchronized to mission-critical watchdog timers. Use Value: Single-package solution replaces four discrete logic gates - reduces mass, improves reliability margin, and simplifies radiation-tolerant layout routing. |
| Onboard Computer I/O Expansion | Spacecraft Telemetry Conditioning |
|
Use Scenario: Expanding GPIO count of radiation-hardened microcontrollers (e.g., RHFLX2010) to interface with mixed-voltage sensors (1.2V ADCs, 2.5V DACs, 5V relays). IC Role / Device Role / Timing Role: Voltage-agnostic buffer translating logic states bidirectionally while maintaining setup/hold timing margins for synchronous peripheral reads. Use Value: Supports simultaneous up/down translation per channel - avoids dedicated up/down translators and enables dynamic reconfiguration of I/O voltage domains. |
Use Scenario: Conditioning analog-to-digital converter (ADC) output streams from radiation-hardened SAR ADCs operating at 2.5V before transmission over 3.3V LVDS serializer links. IC Role / Device Role / Timing Role: Signal integrity-preserving buffer driving ADC data lines into high-capacitance serializer inputs, with 3-state capability for multi-drop bus contention management. Use Value: Delivers <12 mA drive at 2.5V VCC - ensures clean edge rates into 15pF+ serializer inputs without added termination or repeaters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar level-shifting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LV4T125QPWREP | Same functionality and pinout; Q-grade (automotive AEC-Q100 Grade 1) vs. EP-grade (space-level); identical electrical specs but different screening and traceability documentation. | Q-grade intended for automotive safety-critical ECUs; EP-grade includes extended burn-in, lot traceability, and radiation test reports required for DoD/NASA programs. | Select SN74LV4T125PWREP for spaceflight hardware requiring MIL-PRF-38535 Class V qualification and TID tolerance certification. |
| SN74LVC4T245PWR | Bidirectional 4-bit translator with auto-direction sensing; requires direction-control logic; higher ICC (max 40 µA); no 5.5V input tolerance - limited to 3.6V max input. | Used where bidirectional data flow (e.g., I²C, SMBus) is needed; unsuitable for unidirectional high-speed control signals with >3.6V inputs. | Choose SN74LV4T125PWREP when unidirectional, high-voltage-tolerant, low-skew buffering is required - not for bidirectional protocols. |
Compared with SN74LV4T125QPWREP, the SN74LV4T125PWREP offers space-grade screening and radiation assurance; compared with SN74LVC4T245PWR, it provides superior input voltage tolerance and deterministic unidirectional timing - critical for deterministic avionics control loops.
Availability
SN74LV4T125PWREP is available at Aetrix Electronics and suitable for avionics data bus interface, satellite payload power sequencing, onboard computer I/O expansion, and spacecraft telemetry conditioning requiring stable component supply across extended product lifecycles.
Supply support for SN74LV4T125PWREP 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 aerospace-grade logic solutions with over 50 years of space heritage and NASA-approved manufacturing processes.
The SN74LV4T125PWREP belongs to TI's LVxT family of radiation-hardened level translators designed specifically for mixed-voltage signal conditioning in spacecraft, launch systems, and defense electronics where reliability under extreme environmental stress is non-negotiable.
FAQ
What is the maximum input voltage the SN74LV4T125PWREP can tolerate?
The SN74LV4T125PWREP supports input voltages up to 5.5 V regardless of VCC level - confirmed in Absolute Maximum Ratings (VI = –0.5 V to 7 V, with current limits observed). This enables safe interfacing of 5V signals into 1.8V or 2.5V systems without external protection, a key requirement for legacy subsystem integration in satellite platforms where SN74LV4T125PWREP is deployed.
Does the SN74LV4T125PWREP support bidirectional level translation?
No - the SN74LV4T125PWREP is a unidirectional buffer (Y = A) with separate input (A) and output (Y) terminals per channel. It does not auto-detect direction or share I/O pins. For bidirectional protocols like I²C, designers must select alternatives such as SN74LVC4T245PWR; SN74LV4T125PWREP is optimized for deterministic, high-speed unidirectional control and data paths in avionics.
What is the guaranteed operating temperature range for the SN74LV4T125PWREP?
The SN74LV4T125PWREP is specified for continuous operation from –55°C to +125°C, with full electrical performance guaranteed across this range per MIL-PRF-38535 Class V requirements. This includes validated switching characteristics, drive strength, and leakage current - essential for SN74LV4T125PWREP deployment in geostationary orbit thermal cycles and lunar surface missions.
How many independent channels does the SN74LV4T125PWREP provide?
The SN74LV4T125PWREP integrates four fully independent buffer channels (1A→1Y, 2A→2Y, 3A→3Y, 4A→4Y), each with its own active-low output enable (1OE–4OE). This allows granular control of signal paths - for example, enabling one channel for telemetry while holding others in Hi-Z during safe-mode operations - a capability directly leveraged in SN74LV4T125PWREP-based fault-tolerant spacecraft architectures.
Is the SN74LV4T125PWREP pin-compatible with standard LVCMOS buffers?
Yes - the SN74LV4T125PWREP uses the industry-standard TSSOP-14 pinout (PW package) matching SN74LV4T125 variants and legacy 74LV125 families. Pin assignments for GND (7), VCC (14), and channel I/Os follow JEDEC MO-153, enabling drop-in replacement in existing layouts where level translation and radiation tolerance are added post-design - a documented reuse path for SN74LV4T125PWREP in legacy avionics upgrades.
SN74LV4T125PWREP 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:
- 8mA, 8mA
- Voltage - Supply:
- 1.6V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
SN74LV4T125PWREP FAQ
1.How can I place an order for SN74LV4T125PWREP through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV4T125PWREP 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 SN74LV4T125PWREP reliable?
The price and inventory of SN74LV4T125PWREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV4T125PWREP is usually 5 days.
3.What payment methods are accepted for SN74LV4T125PWREP?
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4.How is shipping managed for SN74LV4T125PWREP?
SN74LV4T125PWREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV4T125PWREP 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 SN74LV4T125PWREP?
For technical support, including SN74LV4T125PWREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV4T125PWREP requirements.
6.How does Aetrix verify that SN74LV4T125PWREP is sourced from the original manufacturer or authorized distributors?
All SN74LV4T125PWREP 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 SN74LV4T125PWREP meets industry standards.
7.What is the process for return or replacement of SN74LV4T125PWREP?
All SN74LV4T125PWREP units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV4T125PWREP, 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 SN74LV4T125PWREP part is unused and in its original packaging.
Return procedure for SN74LV4T125PWREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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