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Texas Instruments SN74LV1T126DCKR
- Part No.:
- SN74LV1T126DCKR
- Manufacturer:
- Texas Instruments
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
SN74LV1T126DCKR.pdf
- Description:
- IC BUF NON-INVERT 5.5V SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:12,999
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Product details
Overview
SN74LV1T126DCKR from Texas Instruments is a single-supply, 3-state CMOS buffer gate optimized for bidirectional logic-level translation between 1.2 V and 5.0 V domains. It operates across 1.8 V–5.5 V VCC, delivers up to 8 mA output drive at 5 V, supports 50 MHz operation at 3.3 V, and features 5 V-tolerant inputs - enabling use in mixed-voltage I/O interfacing between microcontrollers, FPGAs, and legacy peripherals in portable and telecom systems.
For engineers reviewing the SN74LV1T126DCKR datasheet, SN74LV1T126DCKR pinout, SN74LV1T126DCKR application, or SN74LV1T126DCKR equivalent, key selection criteria include its wide VCC range (1.8–5.5 V), verified up/down translation paths (e.g., 1.8 V ↔ 3.3 V, 3.3 V ↔ 5.0 V), 3-state control via active-high OE, SC70-5 package footprint, and industrial temperature support (–40°C to +125°C).
Technical Context
The SN74LV1T126DCKR implements a single non-inverting buffer with active-high 3-state output enable (OE), where output logic levels are referenced strictly to VCC. Its LVxT input structure provides reduced VIH/VIL thresholds (e.g., VIH = 0.99 V at 1.8 V VCC) to enable reliable up-translation, while 5 V-tolerant inputs allow down-translation without external components.
It uses balanced CMOS push-pull outputs capable of sourcing/sinking matched currents (e.g., ±8 mA at 5 V), with propagation delays as low as 2.7 ns (5 V, 15 pF) and enable/disable times under 6.5 ns. The device requires no external biasing and supports standard logic pinouts with GND and VCC on opposing corners of the 5-pin SC70 package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.8 V to 5.5 V - enables direct interface between 1.8 V, 2.5 V, 3.3 V, and 5 V logic domains without external level-shifting circuitry. |
| Input Voltage Tolerance | 5 V - allows connection of higher-voltage signals (e.g., 5 V or 3.3 V) to inputs while powered from lower VCC (e.g., 1.8 V or 2.5 V), supporting down-translation. |
| Output Drive | ±8 mA at 5 V VCC - sufficient to drive moderate capacitive loads and reduce signal reflections on PCB traces up to ~10 cm. |
| Max Frequency | 50 MHz at 3.3 V VCC (15 pF load) - suitable for high-speed digital control lines, clock distribution, and data bus isolation in portable and server applications. |
| Operating Temperature | –40°C to +125°C - qualified for industrial and extended-temperature embedded systems including telecom infrastructure and automotive body electronics. |
| Propagation Delay | 2.7 ns typical (5 V, 15 pF) - ensures minimal timing skew in critical signal paths such as reset, interrupt, or enable lines. |
| ESD Rating | ±2000 V HBM - meets JEDEC JS-001 requirements for robust handling in automated assembly and field-replaceable module environments. |
Pinout & Package
SN74LV1T126DCKR is housed in a 5-pin SC70 (DCK) package measuring 2.00 mm × 2.10 mm (body: 2.00 mm × 1.25 mm), optimized for space-constrained portable and wearable designs. Pin 1 is marked with a dot; pin numbering follows standard SC70 top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OE | Active-high output enable input | Drives Y to high-impedance state when low; must not be left floating - tie to VCC or GND if unused. |
| 2 - A | Buffer input | Accepts 1.2 V–5.5 V logic signals; threshold adapts to VCC (e.g., VIH = 0.99 V at 1.8 V VCC). |
| 3 - GND | Ground reference | Return path for all internal logic and output current; requires low-inductance connection to system ground plane. |
| 4 - Y | 3-state buffered output | Non-inverting replica of A when OE = high; high-Z when OE = low; output voltage swing is 0 V to VCC. |
| 5 - VCC | Positive supply | Defines output logic levels and input thresholds; bypass with 0.1 µF ceramic capacitor placed within 2 mm. |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply level translation | Eliminates need for dual-rail translators or discrete MOSFET solutions - reduces BOM count and layout area in mixed-voltage systems. |
| Up-translation capability | Supports 1.2 V → 1.8 V (at 1.8 V VCC), 1.8 V → 3.3 V (at 3.3 V VCC), and 3.3 V → 5.0 V (at 5.0 V VCC) without external components. |
| Down-translation capability | Enables 3.3 V → 1.8 V (at 1.8 V VCC), 5.0 V → 3.3 V (at 3.3 V VCC), and 3.3 V → 2.5 V (at 2.5 V VCC) using only one device. |
| 3-state output control | Active-high OE pin allows bus sharing and multi-drop configurations - essential for shared control lines in microcontroller peripheral interfaces. |
| Industrial temperature range | Validated operation from –40°C to +125°C ensures reliability in uncontrolled environments like base station enclosures or vehicle cabin modules. |
Applications
| Mobile Baseband Interface | Server Management Bus |
|---|---|
Use Scenario: Interfacing a 1.8 V application processor GPIO to a 3.3 V PMIC enable line in a smartphone or tablet. IC Role / Device Role / Timing Role: Single-direction level translator and signal buffer with 3-state isolation during processor sleep mode. Use Value: Prevents back-powering of the 1.8 V domain while maintaining fast edge rates (<7 ns) and eliminating external resistors or MOSFETs. |
Use Scenario: Isolating SMBus clock/data lines between a 3.3 V BMC and 1.2 V FPGA management interface in a rack server. IC Role / Device Role / Timing Role: Bidirectional bus buffer with OE-controlled directionality and 5 V-tolerant inputs for legacy sensor compatibility. Use Value: Enables voltage-domain bridging without pull-up conflicts or timing violations, supporting SMBus spec-compliant rise/fall times. |
| Automotive Body Control Module | Industrial PLC I/O Expansion |
Use Scenario: Translating 5 V CAN transceiver status signals to a 3.3 V microcontroller in a car door module. IC Role / Device Role / Timing Role: Unidirectional level shifter with latch-up immunity (>250 mA) and extended temperature operation. Use Value: Replaces discrete resistor-divider networks while meeting AEC-Q100 stress requirements and reducing board space by >60%. |
Use Scenario: Driving 24 V digital input optocouplers from a 1.8 V FPGA I/O bank in an industrial programmable logic controller. IC Role / Device Role / Timing Role: High-drive buffer (3 mA at 1.8 V) with 5 V-tolerant inputs to accept legacy 5 V sensor outputs. Use Value: Provides noise-immune signal conditioning and eliminates need for external level-shifting ICs or voltage translators in modular I/O designs. |
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 | Same SC70-5 package and VCC range, but features active-low OE instead of active-high OE. | Requires inverted enable logic in host firmware or external inverter; otherwise identical translation performance and drive strength. | Select when existing design already uses active-low control signaling or shares layout with SN74LV1T125-based variants. |
| TXS0102DCUR | 2-channel auto-directional translator in VSSOP-8; no OE pin; relies on data flow detection; max 3.6 V VCC. | Not pin-compatible; lacks 3-state control; unsuitable for fixed-direction or bus-isolation use cases requiring explicit OE. | Prefer only for bidirectional I²C/SMBus applications where automatic direction sensing is required and 5 V tolerance is unnecessary. |
Compared with SN74LV1T125DCKR and TXS0102DCUR, SN74LV1T126DCKR offers deterministic active-high 3-state control ideal for unidirectional enable lines, full 5 V input tolerance for legacy compatibility, and broader VCC flexibility (up to 5.5 V), making it optimal for FPGA-to-peripheral and MCU-to-PMIC interface scenarios.
Availability
SN74LV1T126DCKR is available at Aetrix Electronics and suitable for mobile baseband interfaces, server management buses, automotive body control modules, and industrial PLC I/O expansion requiring stable component supply across extended temperature and mixed-voltage conditions.
Supply support for SN74LV1T126DCKR 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 logic solutions, with over 50 years of innovation in power management, signal chain, and interface technologies.
SN74LV1T126DCKR belongs to TI's LVxT family of single-gate logic devices engineered specifically for voltage-level translation in space- and power-constrained systems - targeting portable, telecom, and industrial applications where mixed-voltage interoperability is critical.
FAQ
What is the maximum operating frequency of the SN74LV1T126DCKR?
The SN74LV1T126DCKR is characterized up to 50 MHz at 3.3 V VCC with a 15 pF load, delivering typical propagation delay of 4.0 ns. At 5 V VCC and 15 pF, it achieves 2.7 ns tpd - making SN74LV1T126DCKR suitable for high-speed control signals, clock enables, and data strobes in portable and server platforms.
Does the SN74LV1T126DCKR support both up-translation and down-translation?
Yes, SN74LV1T126DCKR supports verified bidirectional translation: 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). Its LVxT input structure and 5 V-tolerant pins enable these functions without external components - confirmed in TI's SCLS744D datasheet Tables 1–4.
What is the recommended bypass capacitor for SN74LV1T126DCKR?
A 0.1 µF ceramic capacitor is recommended for SN74LV1T126DCKR, placed as close as possible (≤2 mm) to the VCC pin. For enhanced noise suppression, TI recommends paralleling with a 1 µF capacitor - especially in noisy environments like motor-driven industrial PLCs or high-current server power domains.
Can the OE pin of SN74LV1T126DCKR be left floating?
No - the OE pin of SN74LV1T126DCKR must never be left floating, as this may cause output oscillation or increased ICC. If unused, OE should be tied directly to VCC (for always-enabled operation) or GND (to force high-impedance state). This requirement is explicitly stated in Section 8.4 and Figure 8-4 of the SN74LV1T126DCKR datasheet.
Is SN74LV1T126DCKR compatible with AUP1G and LVC1G logic families?
Yes, SN74LV1T126DCKR's CMOS output is explicitly stated as compatible with AUP1G and LVC1G families per TI's datasheet Feature section. Its output voltage swing (0 V to VCC), low VOL (<0.2 V at 3.3 V), and high VOH (>2.9 V at 3.3 V) meet input threshold requirements of those families across the full 1.8 V–5.5 V VCC range.
SN74LV1T126DCKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 1
- 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:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
SN74LV1T126DCKR FAQ
1.How can I place an order for SN74LV1T126DCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV1T126DCKR 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 SN74LV1T126DCKR reliable?
The price and inventory of SN74LV1T126DCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV1T126DCKR is usually 5 days.
3.What payment methods are accepted for SN74LV1T126DCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV1T126DCKR transactions.
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4.How is shipping managed for SN74LV1T126DCKR?
SN74LV1T126DCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV1T126DCKR 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 SN74LV1T126DCKR?
For technical support, including SN74LV1T126DCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV1T126DCKR requirements.
6.How does Aetrix verify that SN74LV1T126DCKR is sourced from the original manufacturer or authorized distributors?
All SN74LV1T126DCKR 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 SN74LV1T126DCKR meets industry standards.
7.What is the process for return or replacement of SN74LV1T126DCKR?
All SN74LV1T126DCKR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV1T126DCKR, 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 SN74LV1T126DCKR part is unused and in its original packaging.
Return procedure for SN74LV1T126DCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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