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STMicroelectronics 74V2G126STR
- Part No.:
- 74V2G126STR
- Manufacturer:
- STMicroelectronics
- Package:
- SOT-23-8
- Datasheet:
-
74V2G126STR.pdf
- Description:
- IC BUF NON-INVERT 5.5V SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:1,964
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Product details
Overview
74V2G126STR from STMicroelectronics is a dual 3-state bus buffer IC designed for voltage-level translation and bidirectional bus isolation in mixed-voltage systems. It features dual independent channels, 3.8 ns typical propagation delay at 5V, ±8 mA output drive, 2V–5.5V operating supply, and power-down protection enabling safe 0–7V input tolerance regardless of VCC. It is used in portable battery-powered equipment including PDAs and camcorders.
For engineers reviewing the 74V2G126STR datasheet, 74V2G126STR pinout, 74V2G126STR application, or 74V2G126STR equivalent, key selection criteria include 3-state enable timing (tPZL/tPLZ ≤ 7.0 ns at 5V), symmetrical output impedance, latch-up immunity, ESD-protected I/O, and compatibility with 3V/5V interface bridging under industrial temperature range (−55°C to +125°C).
Technical Context
This device implements two independent non-inverting buffers, each with active-low 3-state enable (nG). Each channel supports rail-to-rail input tolerance (0–7V) independent of VCC, enabling robust hot-swap and power sequencing in multi-rail systems.
Its C2MOS sub-micron process delivers low ICC (1 µA max at 25°C) and high noise immunity (VNIH/VNIL ≥ 28% VCC), while balanced tPLH ≅ tPHL ensures minimal duty-cycle distortion in clocked data paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| tPD (typ) | 3.8 ns at VCC = 5V - enables high-speed data transfer in 25 MHz+ digital buses |
| VCC Range | 2V to 5.5V - supports direct interfacing between 2.5V, 3.3V, and 5V logic domains |
| IOL / IOH (min) | 8 mA at VCC = 4.5V - drives standard TTL loads and multiple CMOS inputs without buffering |
| VI Absolute Max | −0.5V to +7.0V - allows safe operation during power-down or voltage mismatch conditions |
| ICC (max) | 1 µA at TA = 25°C - minimizes quiescent power in always-on battery-backed subsystems |
| Operating Temp | −55°C to +125°C - qualified for automotive under-hood and industrial control environments |
| ESD Rating | HBM > 2 kV - integrated protection eliminates need for external TVS on I/O lines |
Pinout & Package
SOT23-8L package: ultra-compact 8-pin surface-mount with 0.65 mm pitch, 2.8 × 2.6 mm body, and exposed pad not present. Designed for high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7 | 1G, 2G - Active-Low Output Enable | Drives corresponding Y output to high-impedance when HIGH; enables bus sharing across multiple drivers |
| 2, 5 | 1A, 2A - Data Inputs | Accept 0–7V inputs irrespective of VCC; tolerate floating or unpowered states safely |
| 3, 6 | 2Y, 1Y - Buffered Outputs | Non-inverting outputs with symmetrical sourcing/sinking capability (±8 mA min) |
| 4 | GND | Reference return for all I/O and internal logic; must be connected before VCC for robust startup |
| 8 | VCC | Single positive supply (2–5.5V); powers both channels and internal protection circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input tolerance | 0–7V input voltage range independent of VCC - eliminates level-shifter requirement in mixed-supply systems |
| Power-down protection | Inputs and outputs remain high-Z and non-latching when VCC = 0 - prevents back-driving and system corruption |
| Low dynamic power | CPD = 14 pF - limits switching current to <100 µA at 10 MHz with 5V supply |
| High noise margin | VNIH/VNIL ≥ 28% VCC - rejects >1.4V peak noise on 5V buses without false triggering |
| Latch-up immunity | Improved C2MOS process - withstands >200 mA transient current per I/O without destructive latch-up |
Applications
| Portable Consumer Electronics | Industrial Control Backplanes |
|---|---|
Use Scenario: Interfacing 3.3V microcontroller GPIOs to 5V display driver ICs in handheld PDAs. IC Role / Device Role / Timing Role: Dual-directional voltage-translating bus buffer with independent 3-state control per channel. Use Value: Eliminates discrete level-shifters; maintains signal integrity with 3.8 ns delay and <0.1V VOL at 8 mA load. | Use Scenario: Isolating sensor ADC data lines from noisy PLC CPU bus in factory automation cabinets. IC Role / Device Role / Timing Role: Noise-immune bus isolator with 28% VCC noise margin and ESD-hardened I/O. Use Value: Prevents cross-talk-induced data corruption during motor switching transients. |
| Automotive Infotainment Head Units | Battery-Powered Medical Monitors |
Use Scenario: Bridging 5V CAN transceiver status signals to 3.3V SoC interrupt inputs in head unit mainboards. IC Role / Device Role / Timing Role: Low-propagation-delay, fail-safe interface buffer with guaranteed operation down to −40°C. Use Value: Meets automotive cold-cranking requirements with functional operation at −55°C and 2V supply. | Use Scenario: Enabling/disabling analog front-end data paths in portable ECG devices during sleep mode. IC Role / Device Role / Timing Role: Ultra-low-quiescent-current (1 µA) bus gate with zero-power leakage during standby. Use Value: Extends battery life by minimizing static current draw in always-connected monitoring circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC2G126DBVR | Lower VCC range (1.65–5.5V); higher ICC (10 µA typ); no 0–7V input tolerance | Not suitable for hot-swap or unpowered-bus scenarios requiring absolute input safety | Prefer when only 1.8V/3.3V interfaces needed and cost is primary constraint |
| 74AUP2G126GW,125 | Higher noise immunity (40% VCC); lower ICC (0.5 µA typ); same SOT23-8 package | Superior for ultra-low-power wearable designs but lacks 7V absolute input rating | Choose when extended battery life outweighs need for universal input fault tolerance |
Compared with SN74LVC2G126DBVR and 74AUP2G126GW,125, the 74V2G126STR uniquely combines 0–7V input tolerance, industrial temperature range, and sub-µA quiescent current-making it optimal for legacy-to-modern voltage bridging where reliability under fault conditions is critical.
Availability
74V2G126STR is available at Aetrix Electronics and suitable for portable consumer electronics, industrial control backplanes, automotive infotainment head units, and battery-powered medical monitors requiring stable component supply across long production lifecycles.
Supply support for 74V2G126STR 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, Switzerland, specializing in automotive, industrial, and power management ICs with vertical manufacturing and broad IP portfolio.
The 74V series targets high-reliability, mixed-voltage interface applications-designed specifically for robustness in portable, automotive, and industrial systems where voltage translation, ESD resilience, and wide temperature operation are mandatory.
FAQ
Can 74V2G126STR operate with VCC = 2.0V while accepting 5V inputs?
Yes. Its absolute input voltage rating is −0.5V to +7.0V, independent of VCC. At VCC = 2.0V, inputs up to 5V are safely tolerated without damage or false logic states due to integrated power-down protection and clamping diodes.
What is the maximum capacitive load this buffer can drive at 5V with ≤5 ns delay?
At VCC = 5.0V and CL = 15 pF, tPLH/tPHL is 3.8 ns (typ) and 7.5 ns (max). Driving >15 pF increases delay nonlinearly; for ≤5 ns max delay, load must stay ≤15 pF including trace and probe capacitance.
Does this device support hot-plug insertion into a live 5V bus?
Yes. With VCC = 0V, all inputs and outputs enter high-impedance state and tolerate 0–7V - enabling safe insertion into powered-backplane systems without disrupting communication or damaging upstream components.
How does its latch-up immunity compare to standard 74HC logic?
It exceeds JEDEC JESD78 Class II (>200 mA) due to C2MOS process enhancements. Standard 74HC devices typically sustain only 100 mA; this part maintains functionality after exposure to 200 mA transient currents on any I/O pin.
74V2G126STR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74V
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- 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-23-8
74V2G126STR FAQ
1.How can I place an order for 74V2G126STR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74V2G126STR 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 74V2G126STR reliable?
The price and inventory of 74V2G126STR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74V2G126STR is usually 5 days.
3.What payment methods are accepted for 74V2G126STR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74V2G126STR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74V2G126STR?
74V2G126STR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74V2G126STR 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 74V2G126STR?
For technical support, including 74V2G126STR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74V2G126STR requirements.
6.How does Aetrix verify that 74V2G126STR is sourced from the original manufacturer or authorized distributors?
All 74V2G126STR 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 74V2G126STR meets industry standards.
7.What is the process for return or replacement of 74V2G126STR?
All 74V2G126STR units undergo pre-shipment inspection (PSI). If there is an issue with 74V2G126STR, 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 74V2G126STR part is unused and in its original packaging.
Return procedure for 74V2G126STR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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