My Inquiry
My Account
Texas Instruments SN74LV126APWT
- Part No.:
- SN74LV126APWT
- Manufacturer:
- Texas Instruments
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LV126APWT.pdf
- Description:
- IC BUF NON-INVERT 5.5V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,908
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74LV126APWT from Texas Instruments is a quadruple bus buffer gate with independent 3-state outputs, designed for 2V to 5.5V VCC operation. It features 14-pin TSSOP packaging, 6.5ns maximum propagation delay at 5V, Ioff support for live insertion and partial power-down, and 5.5V-tolerant inputs-enabling voltage translation in mixed-mode bus interface applications such as server backplanes and network switch data paths.
For engineers reviewing the SN74LV126APWT datasheet, SN74LV126APWT pinout, SN74LV126APWT application, or SN74LV126APWT equivalent, this device serves as a low-drive, high-impedance bus driver optimized for minimizing output ringing and undershoot in 3.3V/5V system interconnects where controlled edge rates and power sequencing robustness are critical.
Technical Context
The SN74LV126APWT implements four independent noninverting buffers, each with dedicated active-high output-enable (OE) control. Each channel operates as a CMOS totem-pole driver with 3-state capability, enabling bidirectional bus sharing without contention when OE is low.
Its Ioff specification ensures isolation during partial power-down, while input tolerance up to 5.5V allows interfacing with higher-voltage logic even when VCC = 2.3V–3.6V-supporting down-translation in heterogeneous voltage domains common in modern embedded and communications hardware.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2V to 5.5V - supports single-supply operation across legacy 5V, standard 3.3V, and low-power 2.5V/2.3V systems |
| tpd Max | 6.5ns at VCC = 5V, CL = 15pF - enables timing-critical bus buffering in high-speed digital interfaces |
| Ioff | ±5µA at VCC = 0V - guarantees signal isolation during hot-swap or partial power-down sequences |
| Input Voltage Tolerance | Up to 5.5V regardless of VCC - permits safe interfacing with 5V logic driving a 3.3V-powered SN74LV126APWT |
| Output Drive | ±16mA at VCC = 4.5V - sufficient for driving moderate capacitive loads (≤50pF) on PCB traces or small fanouts |
| Operating Temperature | –40°C to +125°C - qualified for industrial and extended-temperature embedded applications |
| VOL(P) Typ | <0.8V at VCC = 3.3V - limits ground bounce during simultaneous switching, improving signal integrity |
Pinout & Package
Packaged in a 14-pin Thin Shrink Small Outline Package (TSSOP), SN74LV126APWT measures 5.0mm × 6.4mm with 0.65mm lead pitch and 1.2mm max height-optimized for space-constrained PCB layouts while maintaining hand-solderability and automated assembly compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 4OE, 3OE, 2OE | Active-high output enable (4 independent inputs) | Each controls one buffer's 3-state output; tie low via pulldown resistor for power-up high-impedance safety |
| 1A–4A | Buffer input (4 channels) | Noninverting data inputs tolerant to 5.5V regardless of VCC; accept TTL- or CMOS-level signals |
| 1Y–4Y | Buffer output (4 channels) | CMOS totem-pole outputs with 3-state capability; drive loads up to ±16mA per channel |
| VCC | Positive supply | Single supply rail supporting 2V–5.5V; requires local 0.1µF bypass capacitor |
| GND | Ground reference | Common return path for all I/O and internal circuitry; must be low-impedance connection |
Key Features
| Feature | Design Value |
|---|---|
| Wide VCC range (2V–5.5V) | Enables use across multiple voltage domains without level shifters-reducing BOM count in multi-rail systems |
| 5.5V-tolerant inputs | Allows direct connection of 5V logic to a 3.3V-powered SN74LV126APWT, simplifying voltage translation design |
| Ioff protection | Prevents current backflow during partial power-down, protecting powered-down sections from damage during live insertion |
| Low dynamic ground bounce (VOL(P) <0.8V) | Reduces noise coupling into adjacent signals and power rails-critical for stable operation in dense digital layouts |
| 125°C operating temperature | Supports deployment in thermally demanding environments such as base station RF modules and industrial motor controllers |
Applications
| Server Backplane Interfacing | Network Switch Data Path |
|---|---|
Use Scenario: Isolating and buffering address/data lines between CPU and peripheral slots in modular server chassis. IC Role / Device Role / Timing Role: Quadruple 3-state buffer providing direction-controlled, low-noise signal routing with power sequencing resilience. Use Value: Prevents bus contention during hot-plug events and suppresses ground bounce that could corrupt adjacent high-speed signaling lanes. | Use Scenario: Driving parallel control signals (e.g., PHY reset, LED status, configuration straps) across multiple switch ASICs. IC Role / Device Role / Timing Role: Level-translating bus driver enabling 5V-configurable peripherals to interface with 3.3V switch fabric logic. Use Value: Eliminates need for discrete level shifters while maintaining timing margins due to sub-7ns propagation delay. |
| Electronic Point-of-Sale Terminal | Set-Top Box System Logic |
Use Scenario: Buffering GPIO expansion signals between main controller and peripheral modules (receipt printer, barcode scanner, cash drawer). IC Role / Device Role / Timing Role: Low-power, 3-state bus interface IC managing shared control buses with intermittent activity. Use Value: Ioff and wide VCC range allow graceful shutdown of peripheral modules without affecting host MCU power domain. | Use Scenario: Isolating HDMI CEC, IR receiver, and front-panel button inputs from main SoC in consumer media devices. IC Role / Device Role / Timing Role: Input-conditioning and voltage-domain bridging buffer for asynchronous user-interface signals. Use Value: 5.5V-tolerant inputs accept legacy 5V IR receiver outputs directly, avoiding external clamping diodes or resistors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC126APW | Lower VCC min (1.65V), faster tpd (5.2ns @ 3.3V), but no Ioff support | Suitable for low-voltage-only designs; not recommended for live-insertion or mixed-VCC hot-swap scenarios | Select SN74LVC126APW only if system operates strictly ≥1.65V and does not require Ioff-based isolation. |
| 74LVX126M | Same VCC range (2V–3.6V), identical pinout, but rated only to 85°C ambient | Limited to commercial-temperature applications; lacks extended thermal qualification for industrial deployments | Choose 74LVX126M only for cost-sensitive consumer products with ≤85°C operating envelope. |
Compared with SN74LVC126APW and 74LVX126M, SN74LV126APWT uniquely combines 125°C rating, Ioff, and 5.5V input tolerance-making it the sole option among these three for robust hot-swap-capable, wide-temperature industrial bus interfaces.
Availability
SN74LV126APWT is available at Aetrix Electronics and suitable for server backplane interfacing, network switch data path management, and electronic point-of-sale terminal design requiring stable component supply across extended temperature and mixed-voltage environments.
Supply support for SN74LV126APWT 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The SN74LV126A product line delivers robust, wide-supply-voltage bus interface ICs engineered for reliability in hot-swap-capable systems, voltage translation, and noise-sensitive digital interconnects.
FAQ
What is the maximum supply voltage for SN74LV126APWT?
The absolute maximum VCC rating for SN74LV126APWT is 7V, but its recommended operating range is 2V to 5.5V. Operation above 5.5V violates functional specifications and risks parametric degradation or latch-up. All electrical characteristics-including propagation delay, drive strength, and noise immunity-are guaranteed only within the 2V–5.5V window specified in the datasheet. The SN74LV126APWT must not be operated continuously at 7V.
Does SN74LV126APWT support live insertion?
Yes, SN74LV126APWT supports live insertion via its Ioff feature, which limits leakage current to ±5µA when VCC = 0V. This prevents back-driving powered sections of the board during hot-plug events. To ensure safe operation, OE pins must be pulled low via external resistors during power-up, and all unused inputs must be tied to VCC or GND-not left floating-as confirmed in TI's SCBA004 application report.
What is the pinout configuration of SN74LV126APWT?
SN74LV126APWT uses a standard 14-pin TSSOP layout: Pin 1 = 1OE, Pin 2 = 1A, Pin 3 = 1Y, Pin 4 = 2OE, Pin 5 = 2A, Pin 6 = 2Y, Pin 7 = GND, Pin 8 = 3Y, Pin 9 = 3A, Pin 10 = 3OE, Pin 11 = 4Y, Pin 12 = 4A, Pin 13 = 4OE, Pin 14 = VCC. This matches the D, DB, NS, and PW package variants per TI's SCES131J datasheet Figure 4-1 and Table 4-1.
Can SN74LV126APWT translate 5V logic to 3.3V systems?
Yes, SN74LV126APWT accepts 5.5V-tolerant inputs at any valid VCC (2V–5.5V), making it ideal for down-translation. When powered at 3.3V, its inputs safely interface with 5V logic signals without external components, while its outputs swing rail-to-rail between 0V and 3.3V-providing clean, level-shifted outputs for downstream 3.3V receivers.
What is the thermal performance of SN74LV126APWT in its TSSOP package?
SN74LV126APWT in the PW (TSSOP-14) package has a junction-to-ambient thermal resistance (RθJA) of 119.8°C/W under standard JEDEC test conditions. Its junction-to-board (RθJB) is 61.5°C/W, indicating effective heat conduction through soldered leads into the PCB. For continuous operation at full drive, derating is required above 70°C ambient-verified by TI's thermal metrics in Section 5.4 of SCES131J.
SN74LV126APWT 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:
- Obsolete
- 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:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
SN74LV126APWT FAQ
1.How can I place an order for SN74LV126APWT through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV126APWT 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 SN74LV126APWT reliable?
The price and inventory of SN74LV126APWT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV126APWT is usually 5 days.
3.What payment methods are accepted for SN74LV126APWT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV126APWT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LV126APWT?
SN74LV126APWT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV126APWT 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 SN74LV126APWT?
For technical support, including SN74LV126APWT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV126APWT requirements.
6.How does Aetrix verify that SN74LV126APWT is sourced from the original manufacturer or authorized distributors?
All SN74LV126APWT 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 SN74LV126APWT meets industry standards.
7.What is the process for return or replacement of SN74LV126APWT?
All SN74LV126APWT units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV126APWT, 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 SN74LV126APWT part is unused and in its original packaging.
Return procedure for SN74LV126APWT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74LV126APWT Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
