My Inquiry
My Account
Texas Instruments SN74LV126ANSR
- Part No.:
- SN74LV126ANSR
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SN74LV126ANSR.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 14SOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74LV126ANSR from Texas Instruments is a quadruple 3-state bus buffer gate IC designed for voltage-level translation and bidirectional bus isolation in mixed-voltage systems. It operates from 2V to 5.5V VCC, delivers ≤6.5ns propagation delay at 5V, supports Ioff for live insertion and partial power-down, and features 5.5V-tolerant inputs - enabling use in server backplanes, network switch data paths, and set-top-box logic interfaces.
For engineers reviewing the SN74LV126ANSR datasheet, SN74LV126ANSR pinout, SN74LV126ANSR application, or SN74LV126ANSR equivalent, this page provides verified functional identity, confirmed SOP-14 package mapping, validated 3-state timing behavior, real-world noise performance (VOLP <0.8V, VOHV >2.3V), and two rigorously cross-checked alternative parts with documented functional and application differences.
Technical Context
The SN74LV126ANSR implements four independent noninverting buffers, each with dedicated active-high output-enable (OE) control and true 3-state output capability. Its CMOS design ensures rail-to-rail output swing (0–VCC) and supports mixed-mode operation: inputs accept up to 5.5V regardless of VCC (e.g., 5V inputs driving 3.3V logic), while outputs are strictly limited to VCC levels.
It incorporates Ioff circuitry that disables all outputs and isolates I/O terminals when VCC = 0V, preventing current backflow during hot-plug events or partial system power-down. Latch-up immunity exceeds 250mA per JESD17, and ESD robustness meets ±2000V HBM and ±1000V CDM standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2V to 5.5V - enables interoperability across 2.5V, 3.3V, and 5V logic domains without level shifters |
| tpd (max) | 6.5ns at VCC = 5V, CL = 15pF - guarantees sub-7ns signal propagation for high-speed bus buffering |
| Ioff | ±5µA at VCC = 0V - ensures safe live insertion and prevents back-drive damage during power sequencing |
| VIL/VIH | VIH = 0.7×VCC, VIL = 0.3×VCC - provides noise-immune input thresholds scalable with supply voltage |
| Output Drive | ±16mA at VCC = 4.5–5.5V - sufficient to drive 50pF loads with controlled edge rates, minimizing ringing |
| VOLP / VOHV | <0.8V / >2.3V at VCC = 3.3V - quantified ground bounce and undershoot limits critical for signal integrity in dense PCB layouts |
| Operating Temp | –40°C to +125°C - qualified for industrial and extended-temperature embedded applications |
Pinout & Package
SOP-14 (NS) package: 10.2mm × 7.8mm body, 1.27mm pitch, gull-wing leads, RoHS-compliant NIPDAU finish, MSL Level-1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 4OE, 3OE, 2OE | Active-high output enable (4×) | Each independently controls one buffer's 3-state output; tie low via pulldown resistor for safe power-up high-Z state |
| 1A–4A | Buffer input (4×) | 5.5V-tolerant CMOS inputs - accept logic-high up to 5.5V regardless of VCC value |
| 1Y–4Y | Noninverting buffered output (4×) | True 3-state outputs swing rail-to-rail (0–VCC) with ±16mA drive capability |
| VCC | Positive supply | Single supply pin powering all four buffers; must be bypassed with 0.1µF capacitor near pin |
| GND | Ground reference | Common return path for all I/O and internal logic; requires low-inductance connection to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Wide VCC range (2–5.5V) | Enables single part to serve multiple voltage domains - eliminates need for discrete level translators in mixed-supply systems |
| 5.5V-tolerant inputs | Allows 5V signals to safely interface with 3.3V or 2.5V VCC without external clamping or resistors |
| Ioff protection | Prevents damaging current flow when VCC is unpowered - essential for hot-swap backplane and modular system designs |
| Low ground bounce (VOLP <0.8V) | Reduces simultaneous switching noise on shared ground planes, improving signal integrity in multi-channel bus applications |
| Latch-up immunity >250mA | Guarantees robust operation under transient overvoltage or ESD stress per JESD17 standard |
Applications
| Server Backplane Interface | Network Switch Data Path |
|---|---|
Use Scenario: Isolating control signals between 5V management MCU and 3.3V FPGA-based packet processing engine in a 1U rack server. IC Role / Device Role / Timing Role: SN74LV126ANSR acts as a directionally agnostic, voltage-translating bus buffer - passing configuration commands and status reads with sub-7ns latency and zero contention risk. Use Value: Eliminates need for dual-supply translators; its Ioff allows safe firmware updates while FPGA is powered down, avoiding bus lockup. |
Use Scenario: Driving LED status indicators and managing reset signaling across multiple ASICs operating at different supply voltages in a 48-port Ethernet switch. IC Role / Device Role / Timing Role: SN74LV126ANSR serves as a low-noise, 3-state-controlled signal fanout device - enabling shared indicator lines and synchronized reset assertion across voltage islands. Use Value: VOLP <0.8V prevents false resets caused by ground bounce; 5.5V-tolerant inputs accept 5V LED driver logic without level-shifting components. |
| Set-Top Box System Logic | Electronic Point-of-Sale Terminal |
Use Scenario: Interfacing a 3.3V ARM Cortex-M host processor with legacy 5V peripheral ICs (e.g., IR receiver, tuner control) in a consumer STB. IC Role / Device Role / Timing Role: SN74LV126ANSR functions as a unidirectional voltage translator and bus isolator - ensuring clean command delivery from host to peripherals during boot and runtime. Use Value: Supports mixed-mode operation without external biasing; tpd ≤6.5ns meets real-time IR response timing requirements. |
Use Scenario: Buffering GPIO lines between a 2.5V microcontroller and 5V display driver/keyboard matrix in a retail POS terminal exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: SN74LV126ANSR provides robust, temperature-stable signal conditioning - maintaining valid logic levels across –40°C to +125°C operating range. Use Value: Guaranteed operation at –40°C enables outdoor kiosk deployment; ±16mA drive sustains reliable display backlight control under load variation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC126A | Lower VCC min (1.65V), faster tpd (5.1ns @ 3.3V), but no Ioff support and reduced latch-up immunity (200mA) | Not suitable for live-insertion or partial-power-down systems; better for high-speed, fully powered logic-only designs | Select SN74LVC126A only if VCC ≥1.65V is guaranteed and Ioff is unnecessary |
| 74LVX126M | Narrower VCC range (2.0–3.6V), higher VOLP (≤1.2V), same 3-state architecture and SOP-14 footprint | Restricted to 3.3V-only systems; unsuitable for 5V-tolerant or wide-voltage-range applications | Choose 74LVX126M only for cost-sensitive 3.3V-only designs where 5.5V input tolerance is not required |
Compared with SN74LVC126A and 74LVX126M, the SN74LV126ANSR uniquely combines 5.5V input tolerance, Ioff protection, and full –40°C to +125°C operation - making it the sole option among the three for robust mixed-voltage hot-swap systems.
Availability
SN74LV126ANSR is available at Aetrix Electronics and suitable for server backplane interfaces, network switch data paths, and electronic point-of-sale terminals requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for SN74LV126ANSR 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 decades of experience in high-reliability logic and interface solutions.
The SN74LV126ANSR belongs to TI's LV family of low-voltage, high-noise-immunity CMOS logic devices - engineered specifically for robust signal integrity and voltage-domain bridging in industrial, networking, and consumer electronics.
FAQ
What is the maximum propagation delay of the SN74LV126ANSR at 3.3V supply?
The SN74LV126ANSR has a maximum propagation delay (tpd) of 9.5ns at VCC = 3.3V with 15pF load, per TI's SCES131J datasheet Section 5.7. This value is measured under recommended operating conditions and reflects worst-case timing across temperature and process variation - critical for synchronous bus timing margin analysis in the SN74LV126ANSR design.
Does the SN74LV126ANSR support live insertion when VCC is unpowered?
Yes, the SN74LV126ANSR supports live insertion via its Ioff feature: when VCC = 0V, all outputs enter high-impedance state and input/output leakage remains ≤±5µA, preventing back-drive damage. This behavior is explicitly characterized in Section 5.5 of the SN74LV126ANSR datasheet and validated per JESD78.
What package type and dimensions does the SN74LV126ANSR use?
The SN74LV126ANSR uses the SOP-14 (NS) package: 10.2mm × 7.8mm body size, 1.27mm lead pitch, gull-wing terminations, and RoHS-compliant NIPDAU plating. Mechanical details including land pattern and stencil design are specified in TI's D0014A package outline drawing referenced in the SN74LV126ANSR orderable information addendum.
Can the SN74LV126ANSR interface 5V inputs with a 2.5V VCC supply?
Yes, the SN74LV126ANSR accepts input voltages up to 5.5V regardless of VCC value - enabling direct connection of 5V signals to its A-inputs while operating at 2.5V VCC. This 5.5V-tolerant input specification is confirmed in Section 5.3 (Recommended Operating Conditions) and Section 7.3 (Feature Description) of the SN74LV126ANSR datasheet.
What is the thermal resistance (RθJA) of the SN74LV126ANSR in its SOP-14 package?
The SN74LV126ANSR in SOP-14 (NS) package has a junction-to-ambient thermal resistance (RθJA) of 89.6°C/W, as specified in Table 5.4 of the TI SCES131J datasheet. This value assumes standard JEDEC test board conditions and is used to calculate maximum allowable power dissipation at elevated ambient temperatures for the SN74LV126ANSR.
SN74LV126ANSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- Package/Case:
- 14-SOIC (0.209", 5.30mm 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:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
SN74LV126ANSR FAQ
1.How can I place an order for SN74LV126ANSR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV126ANSR 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 SN74LV126ANSR reliable?
The price and inventory of SN74LV126ANSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV126ANSR is usually 5 days.
3.What payment methods are accepted for SN74LV126ANSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV126ANSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LV126ANSR?
SN74LV126ANSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV126ANSR 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 SN74LV126ANSR?
For technical support, including SN74LV126ANSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV126ANSR requirements.
6.How does Aetrix verify that SN74LV126ANSR is sourced from the original manufacturer or authorized distributors?
All SN74LV126ANSR 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 SN74LV126ANSR meets industry standards.
7.What is the process for return or replacement of SN74LV126ANSR?
All SN74LV126ANSR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV126ANSR, 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 SN74LV126ANSR part is unused and in its original packaging.
Return procedure for SN74LV126ANSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74LV126ANSR 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…
