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NXP Semiconductors 74HCT2G126DC,125
- Part No.:
- 74HCT2G126DC,125
- Manufacturer:
- NXP Semiconductors
- Package:
- 8-VFSOP (0.091", 2.30mm Width)
- Datasheet:
-
74HCT2G126DC,125.pdf
- Description:
- IC BUF NON-INVERT 5.5V 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,352
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Product details
Overview
74HCT2G126DC,125 from NXP Semiconductors is a dual 3-state buffer/line driver optimized for TTL-level input compatibility and industrial-temperature operation. It features two independent non-inverting buffers with separate output-enable inputs (1OE, 2OE), operates from 4.5 V to 5.5 V, delivers ±6 mA output drive at VCC = 4.5 V, and supports −40 °C to +125 °C ambient range - enabling use in bus interface and level-shifting circuits within programmable logic controllers.
For engineers reviewing the 74HCT2G126DC,125 datasheet, 74HCT2G126DC,125 pinout, 74HCT2G126DC,125 application, or 74HCT2G126DC,125 equivalent, key selection criteria include TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5 V), symmetrical output impedance, balanced propagation delays (tpd = 15 ns typ at VCC = 4.5 V), and VSSOP8 package suitability for high-density PCB layouts.
Technical Context
The 74HCT2G126DC,125 implements standard CMOS silicon with TTL-input threshold circuitry, ensuring direct compatibility with legacy 5 V TTL logic families while maintaining low static current (ICC ≤ 20 μA at VCC = 5.5 V). Its dual-channel architecture isolates signal paths, and each channel's 3-state control allows bidirectional bus sharing without external direction logic.
Input clamp diodes enable safe interfacing to voltages exceeding VCC when used with current-limiting resistors. The device complies with JEDEC standard no. 7A and achieves HBM ESD robustness >2000 V and MM >200 V - supporting reliable operation in industrial environments with moderate electrostatic exposure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.5 V to 5.5 V - ensures stable operation across standard 5 V rail tolerances in industrial systems |
| Input Thresholds (VCC = 4.5 V) | VIH = 2.0 V min, VIL = 0.8 V max - guarantees interoperability with 5 V TTL outputs |
| Output Drive (VCC = 4.5 V) | ±6.0 mA - sufficient to drive 50 pF loads with <30 ns propagation delay and <18 ns transition time |
| Propagation Delay | 15 ns typical (nA to nY, CL = 50 pF) - enables reliable timing in 33 MHz bus applications |
| Operating Temperature | −40 °C to +125 °C - qualified for under-hood automotive control modules and industrial motor drives |
| ESD Protection | HBM >2000 V, MM >200 V - reduces need for external protection in factory-floor I/O interfaces |
| Power Dissipation Capacitance | 11 pF per buffer (enabled), 1 pF (disabled) - enables accurate dynamic power estimation in battery-sensitive designs |
Pinout & Package
VSSOP8 package (SOT765-1): plastic very thin shrink small outline, 8 leads, body width 2.3 mm, lead pitch 0.5 mm, pin 1 index in lower-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7 | 1OE, 2OE | Active-low 3-state enable inputs - assert LOW to activate respective buffer output; HIGH places output in high-impedance state |
| 2, 5 | 1A, 2A | Non-inverting data inputs - accept TTL-compatible logic levels; internal clamp diodes support overvoltage-safe interfacing |
| 3, 6 | 2Y, 1Y | Buffered non-inverting outputs - deliver rail-to-rail CMOS output swing with symmetrical sourcing/sinking capability |
| 4 | GND | Ground reference - must be connected to system 0 V plane; serves as return path for all input/output currents |
| 8 | VCC | Positive supply - powers internal logic and output stages; decoupling capacitor (100 nF) required within 5 mm |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5 V - eliminates need for level translators when interfacing with legacy microcontrollers or FPGAs |
| Symmetrical output impedance | Matched pull-up/pull-down strength - ensures consistent rise/fall times and reduced signal distortion on shared buses |
| Balanced propagation delays | tpd variation ≤ 2 ns between channels - critical for skew-sensitive parallel data paths in instrumentation front-ends |
| High noise immunity | Input hysteresis and 40 % VCC noise margin - maintains logic integrity in electrically noisy PLC backplanes |
| Low quiescent current | ICC ≤ 20 μA at VCC = 5.5 V - supports always-on monitoring functions in energy-constrained edge nodes |
Applications
| Industrial Bus Interface | Microcontroller GPIO Expansion |
|---|---|
Use Scenario: Isolating and driving multiple peripheral devices on a shared SPI or parallel control bus in a programmable logic controller cabinet. IC Role / Device Role / Timing Role: Dual 3-state buffer providing direction-independent bus arbitration and load isolation between master and slave peripherals. Use Value: Enables hot-swappable module insertion without bus contention, leveraging independent OE controls and high-impedance OFF-state leakage < ±10 μA. |
Use Scenario: Extending limited GPIO count of an ARM Cortex-M0+ MCU to drive discrete LEDs, relays, and sensors in a smart sensor node. IC Role / Device Role / Timing Role: Level-shifting and current-boosting buffer translating 3.3 V MCU outputs to 5 V logic levels while sourcing up to 6 mA per channel. Use Value: Eliminates need for discrete transistors or MOSFETs, reducing BOM count and layout area in space-constrained IoT edge devices. |
| Automotive Body Control Module | Test Equipment Signal Conditioning |
Use Scenario: Interfacing a CAN controller's digital status lines to external diagnostic connectors in an under-dash BCM housing. IC Role / Device Role / Timing Role: Robust 3-state buffer handling voltage transients and ESD events during connector mating/unmating in automotive environments. Use Value: Delivers HBM >2000 V and −40 °C to +125 °C operation without derating, meeting ISO 16750-2 electrical stress requirements. |
Use Scenario: Conditioning digital stimulus signals from a pattern generator before injection into DUT inputs during ATE functional testing. IC Role / Device Role / Timing Role: Low-skew, low-capacitance buffer preserving signal edge fidelity and minimizing loading on precision waveform sources. Use Value: Achieves <15 ns propagation delay and <15 ns transition time with 1.5 pF output capacitance - critical for sub-33 MHz test vector accuracy. |
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 |
|---|---|---|---|
| SN74LVC2G126DCUR | Wider VCC range (1.65–5.5 V); CMOS inputs only; lower ICC (10 μA max) | Not TTL-compatible; requires level translation for legacy 5 V systems | Select when interfacing with 1.8 V/3.3 V MCUs and full rail flexibility is needed |
| 74AHC2G126DC,125 | Higher speed (tpd = 9 ns typ at VCC = 5 V); CMOS inputs; wider VCC (2–5.5 V) | Lacks TTL input thresholds - unsuitable for direct connection to 5 V TTL outputs | Choose for high-speed 3.3 V systems where VIH/VIL thresholds match host logic family |
Compared with SN74LVC2G126DCUR and 74AHC2G126DC,125, the 74HCT2G126DC,125 uniquely provides guaranteed TTL input compatibility at 5 V while maintaining industrial temperature range and VSSOP8 footprint - making it the only drop-in solution for upgrading legacy 74LS244-based bus interfaces without redesigning input conditioning.
Availability
74HCT2G126DC,125 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HCT2G126DC,125 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The 74HCT2G126DC,125 belongs to NXP's legacy 74HCT logic family, designed specifically to provide TTL-compatible interface capability in modern CMOS processes - targeting industrial control, instrumentation, and legacy-system upgrade paths.
FAQ
What is the maximum output current specification for 74HCT2G126DC,125?
The 74HCT2G126DC,125 specifies ±6.0 mA output current per channel at VCC = 4.5 V, measured under VOH ≥ 3.7 V (sourcing) and VOL ≤ 0.4 V (sinking). This rating applies across the full −40 °C to +125 °C operating range and supports reliable driving of standard 50 pF logic loads without external buffering.
Does 74HCT2G126DC,125 support 3.3 V logic inputs?
No - the 74HCT2G126DC,125 is designed exclusively for TTL-level input compatibility, with VIH = 2.0 V min and VIL = 0.8 V max at VCC = 4.5 V. Applying 3.3 V logic signals may result in undefined switching behavior; for mixed-voltage systems, use SN74LVC2G126DCUR or level-shifting circuitry instead of relying on 74HCT2G126DC,125.
What is the pin 1 marking location on the 74HCT2G126DC,125 VSSOP8 package?
On the 74HCT2G126DC,125 in SOT765-1 (VSSOP8) packaging, the pin 1 indicator is a small dot or notch located in the lower-left corner of the device body, directly below the alphanumeric marking code "T26". This matches the standardized pin 1 indexing shown in Figure 4 and Figure 10 of the NXP datasheet Rev. 5.
Can 74HCT2G126DC,125 be used in automotive applications?
Yes - the 74HCT2G126DC,125 is qualified for −40 °C to +125 °C operation and meets JEDEC 7A standards, making it suitable for non-safety-critical automotive body electronics such as door modules, lighting controllers, and diagnostic interfaces. However, it is not AEC-Q100 qualified; for safety-critical systems, consult NXP's automotive-grade alternatives.
How does the 3-state enable function work on 74HCT2G126DC,125?
Each buffer in the 74HCT2G126DC,125 has its own active-low output enable input: 1OE controls channel 1 (pins 1A→1Y), and 2OE controls channel 2 (pins 2A→2Y). When OE is LOW, the corresponding output follows the input; when OE is HIGH, the output enters high-impedance (Z) state with leakage < ±10 μA - enabling true bus sharing without contention in the 74HCT2G126DC,125.
74HCT2G126DC,125 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74HCT
- Package/Case:
- 8-VFSOP (0.091", 2.30mm Width)
- 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:
- 6mA, 6mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
74HCT2G126DC,125 FAQ
1.How can I place an order for 74HCT2G126DC,125 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT2G126DC,125 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 74HCT2G126DC,125 reliable?
The price and inventory of 74HCT2G126DC,125 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT2G126DC,125 is usually 5 days.
3.What payment methods are accepted for 74HCT2G126DC,125?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT2G126DC,125 transactions.
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4.How is shipping managed for 74HCT2G126DC,125?
74HCT2G126DC,125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT2G126DC,125 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 74HCT2G126DC,125?
For technical support, including 74HCT2G126DC,125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT2G126DC,125 requirements.
6.How does Aetrix verify that 74HCT2G126DC,125 is sourced from the original manufacturer or authorized distributors?
All 74HCT2G126DC,125 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 74HCT2G126DC,125 meets industry standards.
7.What is the process for return or replacement of 74HCT2G126DC,125?
All 74HCT2G126DC,125 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT2G126DC,125, 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 74HCT2G126DC,125 part is unused and in its original packaging.
Return procedure for 74HCT2G126DC,125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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