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STMicroelectronics 74V1G126CTR
- Part No.:
- 74V1G126CTR
- Manufacturer:
- STMicroelectronics
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
74V1G126CTR.pdf
- Description:
- IC BUF NON-INVERT 5.5V SOT323-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,634
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Product details
Overview
74V1G126CTR from STMicroelectronics is a single-channel 3-state bus buffer with CMOS logic interface, designed for voltage-level translation between 3V and 5V systems. It features 3.4ns typical propagation delay at 5V, ±8mA symmetrical output drive, 2V–5.5V operating supply range, and input tolerance up to 7V independent of VCC - enabling robust I/O interfacing in mixed-voltage digital subsystems.
For engineers reviewing the 74V1G126CTR datasheet, 74V1G126CTR pinout, 74V1G126CTR application, or 74V1G126CTR equivalent, key selection criteria include 3-state enable timing (tPZH/tPLZ ≤ 8.0ns), high-noise immunity (VNIH/VNIL ≥ 28% VCC), power-down input protection, and SOT323-5L package compatibility with space-constrained PCB layouts.
Technical Context
The 74V1G126CTR implements a single non-inverting buffer with active-low 3-state control (1G). Its C2MOS process enables rail-to-rail input tolerance (–0.5V to +7.0V) and latch-up immunity, allowing safe hot-plug operation in backplane or modular interface designs.
Propagation delays are balanced (tPLH ≅ tPHL), and output impedance is symmetrical (|IOH| = IOL ≥ 8mA at VCC = 4.5V), ensuring consistent rise/fall times and minimal signal distortion in bidirectional data paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| tPD (Typ) | 3.4ns at VCC = 5V - enables >100MHz data throughput in short trace applications |
| VCC Range | 2V to 5.5V - supports direct integration into 3.3V and 5V logic domains without level shifters |
| Input Voltage Range | –0.5V to +7.0V - allows safe interfacing with overvoltage or floating inputs regardless of supply |
| IOL / IOH | ≥8mA at VCC = 4.5V - drives standard TTL/CMOS loads with controlled edge rates |
| ICC (Max) | 1µA at TA = 25°C - minimizes standby power in battery-backed or always-on subsystems |
| VNIH / VNIL | ≥28% VCC - rejects noise spikes up to ~1.4V on 5V rails, improving system reliability |
| tPZH / tPLZ | ≤8.0ns at CL = 15pF, VCC = 5V - ensures fast bus arbitration and low-latency peripheral enable/disable |
Pinout & Package
SOT323-5L package: ultra-small surface-mount outline (1.80 × 2.40 mm), 5-pin configuration with exposed pad not present, optimized for high-density routing and thermal performance in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (1G) | Active-Low Output Enable | Drives output Y to high-impedance when HIGH; enables bus sharing in multi-driver systems |
| 2 (1A) | Data Input | Accepts –0.5V to +7.0V signals; tolerant of voltage overshoot and floating states |
| 3 (GND) | Ground Reference | 0V return path for logic and output current; decoupling capacitor must be placed adjacent |
| 4 (1Y) | Non-Inverting Buffered Output | Delivers rail-aligned output with symmetrical drive strength and <8ns enable/disable transitions |
| 5 (VCC) | Positive Supply | Supplies core logic and output stage; supports 2V–5.5V operation with internal regulation |
Key Features
| Feature | Design Value |
|---|---|
| 3-State Output Control | Active-low 1G input provides deterministic bus release with sub-8ns disable timing |
| Rail-Independent Input Tolerance | Inputs accept 0–7V regardless of VCC - eliminates external clamping diodes in mixed-voltage interfaces |
| Balanced Propagation Delays | tPLH ≅ tPHL ensures matched rise/fall timing critical for clock-forwarding and strobe-based protocols |
| Low Quiescent Current | 1µA max ICC enables use in energy-sensitive applications such as IoT sensor nodes and wearables |
| Enhanced Latch-Up Immunity | Sub-micron C2MOS process prevents destructive latch-up under transient overvoltage or ESD events |
Applications
| Industrial PLC I/O Modules | USB Peripheral Interface Logic |
|---|---|
Use Scenario: Isolating microcontroller GPIO from field-side 24V digital inputs via optocoupler-driven buffers. IC Role / Device Role / Timing Role: Level-translating, 3-state bus buffer enabling shared data lines between 3.3V MCU and 5V industrial logic. Use Value: Input tolerance to 7V avoids external protection components; 3.4ns delay preserves timing margins in real-time scan cycles. | Use Scenario: Driving USB D+ and D– line control signals from a 3.3V host controller to 5V transceiver ICs. IC Role / Device Role / Timing Role: Non-inverting buffer with fast enable/disable for dynamic USB device enumeration and suspend/resume handshaking. Use Value: tPZH ≤ 8.0ns ensures reliable handshake timing; symmetrical drive maintains signal integrity across differential pairs. |
| Automotive Body Control Units | Portable Medical Sensor Hubs |
Use Scenario: Interfacing low-voltage MCUs with legacy 5V CAN transceivers and LIN drivers in dashboard modules. IC Role / Device Role / Timing Role: Voltage-tolerant bus buffer isolating MCU pins during power sequencing and wake-up events. Use Value: Power-down protection prevents back-driving during MCU reset; –55°C to +125°C rating meets AEC-Q100 Grade 2 requirements. | Use Scenario: Multiplexing analog sensor outputs (e.g., ECG, SpO₂) onto a shared ADC interface in compact wearable devices. IC Role / Device Role / Timing Role: Low-power 3-state buffer enabling channel selection without signal contention or cross-talk. Use Value: 1µA quiescent current extends battery life; SOT323-5L footprint saves board area in sub-20mm² form factors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-channel 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G126DBVR | Lower VCC min (1.65V), higher ICC (10µA typ), no 7V input tolerance | Optimized for 1.8V/3.3V-only systems; lacks overvoltage resilience for industrial backplanes | Select when operating exclusively below 3.6V and board space permits larger SOT23-5 package |
| 74AHC1G126SE-7 | Higher speed (tPD = 2.5ns @ 5V), but only 5.5V absolute max input, no power-down protection | Better for high-frequency clock distribution; unsuitable for hot-swap or floating-bus scenarios | Prefer for timing-critical signal fanout where input overvoltage risk is absent |
Compared with SN74LVC1G126DBVR and 74AHC1G126SE-7, the 74V1G126CTR uniquely combines 7V input tolerance, sub-1µA standby current, and SOT323-5L compactness - making it optimal for mixed-voltage, space-constrained, and ruggedized embedded interfaces.
Availability
74V1G126CTR is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, portable medical sensor hubs, and USB peripheral interface logic requiring stable component supply across extended temperature and mixed-voltage environments.
Supply support for 74V1G126CTR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, specializing in microcontrollers, power management, analog, and automotive-grade ICs with vertical manufacturing capability.
The 74V series targets high-speed, low-power CMOS logic for industrial and automotive applications, emphasizing robustness, wide supply range, and interoperability across voltage domains.
FAQ
Can the 74V1G126CTR safely interface a 5V microcontroller with a 3.3V FPGA?
Yes. Its 2V–5.5V VCC range and input tolerance up to 7V allow direct connection: drive the FPGA's 3.3V-tolerant inputs from the buffer's 3.3V-powered output, while the buffer's inputs accept 5V logic levels without damage or level-shifting circuitry.
What is the maximum capacitive load the 74V1G126CTR can drive while maintaining specified timing?
The AC specifications are characterized up to 50pF load capacitance. At CL = 50pF and VCC = 5V, tPLH/tPHL remain ≤6.5ns and tPZH/tPLZ ≤7.5ns. Driving >50pF may increase propagation and enable/disable delays beyond datasheet limits and require layout optimization or buffering.
Does the 74V1G126CTR require external pull-up or pull-down resistors on its 1G (enable) pin?
No. The 1G input has CMOS-compatible thresholds (VIH ≥ 0.7VCC, VIL ≤ 0.3VCC) and <1µA leakage. A clean logic-level signal from an MCU GPIO or dedicated control line suffices; external biasing is unnecessary unless open-drain driving or noise-prone environments demand added hysteresis.
How does the 74V1G126CTR handle input signals applied before VCC is powered?
It provides full power-down protection: inputs tolerate –0.5V to +7.0V regardless of VCC state. When VCC = 0V, the inputs are isolated by internal circuitry, preventing back-powering or latch-up - enabling safe "hot insertion" into live backplanes or modular systems.
74V1G126CTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74V
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 2V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323-5
74V1G126CTR FAQ
1.How can I place an order for 74V1G126CTR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74V1G126CTR 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 74V1G126CTR reliable?
The price and inventory of 74V1G126CTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74V1G126CTR is usually 5 days.
3.What payment methods are accepted for 74V1G126CTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74V1G126CTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74V1G126CTR?
74V1G126CTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74V1G126CTR 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 74V1G126CTR?
For technical support, including 74V1G126CTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74V1G126CTR requirements.
6.How does Aetrix verify that 74V1G126CTR is sourced from the original manufacturer or authorized distributors?
All 74V1G126CTR 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 74V1G126CTR meets industry standards.
7.What is the process for return or replacement of 74V1G126CTR?
All 74V1G126CTR units undergo pre-shipment inspection (PSI). If there is an issue with 74V1G126CTR, 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 74V1G126CTR part is unused and in its original packaging.
Return procedure for 74V1G126CTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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