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NXP Semiconductors 74HCT2G02DC,125
- Part No.:
- 74HCT2G02DC,125
- Manufacturer:
- NXP Semiconductors
- Category:
- Gates and Inverters
- Package:
- 8-VFSOP (0.091", 2.30mm Width)
- Datasheet:
-
74HCT2G02DC,125.pdf
- Description:
- IC GATE NOR 2CH 2-INP 8-VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:42,000
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Product details
Overview
74HCT2G02DC,125 from Nexperia is a dual 2-input NOR gate logic IC in VSSOP8 package, operating from 4.5 V to 5.5 V supply, with TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), propagation delay of 12–29 ns at 4.5 V, and rated for -40 °C to +125 °C ambient. It enables compact level-shifting logic in space-constrained industrial control and sensor interface circuits.
For engineers reviewing the 74HCT2G02DC,125 datasheet, 74HCT2G02DC,125 pinout, 74HCT2G02DC,125 application, or 74HCT2G02DC,125 equivalent, this device serves as a low-power, high-noise-immunity dual NOR gate optimized for interfacing TTL-level signals in automotive-qualified industrial modules, battery-powered instrumentation, and mixed-voltage digital subsystems.
Technical Context
The 74HCT2G02DC,125 implements two independent CMOS-based NOR gates with TTL-compatible input voltage thresholds-ensuring reliable recognition of 3.3 V or 5 V TTL outputs while driving standard CMOS loads. Its inputs include clamp diodes, allowing safe interfacing to voltages exceeding VCC when used with current-limiting resistors.
It operates across a narrow 4.5–5.5 V supply range with guaranteed static performance (VOH ≥ 4.13 V at IO = –4.0 mA; VOL ≤ 0.33 V at IO = 4.0 mA) and dynamic timing (tpd ≤ 29 ns, tt ≤ 22 ns at VCC = 4.5 V, CL = 15 pF), making it suitable for synchronous logic glue in microcontroller peripheral interfaces and discrete state-machine implementations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Dual independent 2-input NOR gate - provides two discrete OR-NOT logic paths in one package. |
| Supply Voltage Range | 4.5 V to 5.5 V - matches standard 5 V TTL/CMOS systems and ensures compatibility with legacy industrial controllers. |
| Input Thresholds | VIH ≥ 2.0 V, VIL ≤ 0.8 V - guarantees robust recognition of TTL output levels without external level shifters. |
| Propagation Delay | 12–29 ns at VCC = 4.5 V - supports clock rates up to ~17 MHz in simple combinatorial paths. |
| Output Drive | ±4.0 mA at VCC = 4.5 V - sufficient to drive 10 LSTTL loads or multiple CMOS inputs with margin. |
| Operating Temperature | –40 °C to +125 °C - qualified for under-hood automotive modules and industrial motor drives. |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - reduces risk of field failure during PCB handling and assembly. |
Pinout & Package
VSSOP8 plastic very thin shrink small outline package (SOT765-1); 8 leads; body width 2.3 mm; pin 1 indicator located on lower-left corner below marking "T02".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1A | First NOR gate input A - accepts TTL/CMOS logic levels; includes internal clamp diode to VCC/GND. |
| 2 | 1B | First NOR gate input B - electrically identical to 1A; both inputs share same VIH/VIL specs. |
| 3 | 1Y | First NOR gate output Y - active-low output; sinks or sources up to ±4.0 mA at VCC = 4.5 V. |
| 4 | GND | Ground reference - must be connected to system 0 V plane; shared return for both gates. |
| 5 | 2A | Second NOR gate input A - fully isolated from first gate; no internal coupling or crosstalk. |
| 6 | 2B | Second NOR gate input B - identical electrical behavior to 1A/1B; supports independent logic functions. |
| 7 | 2Y | Second NOR gate output Y - complements inputs 2A/2B per NOR truth table; fanout-matched to 1Y. |
| 8 | VCC | Positive supply - powers both gates; requires local 100 nF ceramic decoupling within 5 mm. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | Enables direct connection to legacy 5 V TTL outputs without level-shifting circuitry. |
| Clamp diode protection | Allows safe interface to signals up to VCC + 0.5 V using series current-limiting resistors. |
| High noise immunity | Input hysteresis and 40 % noise margin at VCC = 5 V reduce susceptibility to EMI-induced glitches. |
| Latch-up immunity | Exceeds 100 mA per JESD78 Class II Level B - prevents destructive latch-up under transient overvoltage. |
| Low quiescent current | ICC ≤ 20 μA at VCC = 5.5 V - minimizes standby power in always-on sensor nodes and watchdog circuits. |
Applications
| Industrial PLC I/O Expansion | Automotive Body Control Module |
|---|---|
|
Use Scenario: Adding discrete logic for status arbitration between multiple sensor inputs before feeding MCU GPIO. IC Role / Device Role / Timing Role: Dual NOR gate performs wired-OR inversion to generate fault-active-low enable signals with sub-30 ns response. Use Value: Eliminates need for external pull-ups and discrete transistors, reducing BOM count by 3 components per channel. |
Use Scenario: Debouncing and combining door-open and seat-belt-unlatched signals for interior lighting control. IC Role / Device Role / Timing Role: Implements asynchronous NOR logic to assert "cabin alert" signal only when both conditions are true. Use Value: Meets AEC-Q100 Grade 1 temperature requirements while consuming < 100 μW in static state. |
| Portable Medical Instrumentation | Smart Energy Meter Interface |
|
Use Scenario: Glue logic between low-voltage ADC ready flag and microcontroller interrupt request line. IC Role / Device Role / Timing Role: Inverts and combines two independent "data valid" flags into single synchronized IRQ assertion. Use Value: Provides deterministic 12 ns max propagation delay, enabling precise timing alignment in 100 kHz sampling systems. |
Use Scenario: Interfacing isolated RS-485 transceiver status pins to 5 V microcontroller reset supervisor. IC Role / Device Role / Timing Role: NOR gate detects simultaneous TX/RX activity to trigger communication watchdog timeout reset. Use Value: Delivers fail-safe behavior with guaranteed operation at 125 °C ambient inside sealed meter enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual NOR gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC2G02DCKR | Wider supply range (1.65–5.5 V), CMOS inputs only (VIH = 0.7×VCC), 3.3 V native - lacks TTL threshold compatibility. | Suitable for 3.3 V-only systems; cannot directly replace 74HCT2G02DC in 5 V TTL environments without level translation. | Select when migrating to 3.3 V logic domains and full voltage flexibility is required over TTL interoperability. |
| MC74VHC2G02DTT1G | Same 2–5.5 V supply, CMOS inputs (VIH = 0.67×VCC), higher speed (tpd = 7.5 ns typ at 5 V), no TTL input spec. | Better for high-speed 5 V CMOS designs but fails to recognize standard TTL VOH (2.4 V) reliably at VCC = 5 V. | Prefer for new 5 V CMOS designs where speed > 20 MHz matters and all upstream drivers are CMOS-compliant. |
Compared with SN74LVC2G02DCKR and MC74VHC2G02DTT1G, the 74HCT2G02DC,125 uniquely guarantees TTL-level input recognition across its full 4.5–5.5 V range - a critical differentiator in mixed-signal industrial and automotive systems where legacy 5 V TTL peripherals remain prevalent.
Availability
74HCT2G02DC,125 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, portable medical instrumentation, and smart energy meter interface requiring stable component supply across extended temperature ranges.
Supply support for 74HCT2G02DC,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
Nexperia is a global semiconductor expert delivering high-performance logic, analog, and MOSFET solutions with focus on efficiency, reliability, and miniaturization.
The 74HCT2G02DC,125 belongs to Nexperia's 74HCT advanced logic family - engineered for seamless TTL-to-CMOS interfacing in harsh-environment industrial and automotive applications.
FAQ
Can 74HCT2G02DC,125 operate at 3.3 V supply?
No. The 74HCT2G02DC,125 is specified only for 4.5 V to 5.5 V operation per its Recommended Operating Conditions table. At 3.3 V, input thresholds fall outside TTL specification (VIH minimum becomes undefined), and output drive degrades below guaranteed levels. Use 74LVC2G02 for 3.3 V systems.
What is the maximum capacitive load this device can drive reliably?
The 74HCT2G02DC,125 is characterized up to 50 pF load capacitance in its dynamic test data (Table 10), with propagation delay and transition time specified at 15 pF and 50 pF. For stable operation beyond 50 pF, add a series resistor (22–47 Ω) near the output to damp ringing and limit peak current.
Does this part have Schmitt-trigger inputs?
No. The 74HCT2G02DC,125 uses standard CMOS input stages with no hysteresis. Its input thresholds are fixed (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5 V), not adaptive. For noisy signal conditioning, pair with a dedicated Schmitt-trigger buffer such as 74HCT14.
Is thermal derating required above 99 °C ambient?
Yes. Per datasheet Section 8, total power dissipation derates linearly at 4.9 mW/K above 99 °C for the VSSOP8 (SOT765-1) package. At 125 °C ambient, maximum allowed PD drops to approximately 185 mW - well above typical 1–2 mW static consumption, but relevant under heavy switching loads.
74HCT2G02DC,125 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74HCT
- Package/Case:
- 8-VFSOP (0.091", 2.30mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- NOR Gate
- Number of Circuits:
- 2
- Number of Inputs:
- 2
- Features:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Max):
- 20 µA
- Current - Output High, Low:
- 4mA, 4mA
- Input Logic Level - Low:
- 0.8V
- Input Logic Level - High:
- 2V
- Max Propagation Delay @ V, Max CL:
- 12ns @ 4.5V, 50pF
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
74HCT2G02DC,125 FAQ
1.How can I place an order for 74HCT2G02DC,125 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT2G02DC,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 74HCT2G02DC,125 reliable?
The price and inventory of 74HCT2G02DC,125 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT2G02DC,125 is usually 5 days.
3.What payment methods are accepted for 74HCT2G02DC,125?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT2G02DC,125 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT2G02DC,125?
74HCT2G02DC,125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT2G02DC,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 74HCT2G02DC,125?
For technical support, including 74HCT2G02DC,125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT2G02DC,125 requirements.
6.How does Aetrix verify that 74HCT2G02DC,125 is sourced from the original manufacturer or authorized distributors?
All 74HCT2G02DC,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 74HCT2G02DC,125 meets industry standards.
7.What is the process for return or replacement of 74HCT2G02DC,125?
All 74HCT2G02DC,125 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT2G02DC,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 74HCT2G02DC,125 part is unused and in its original packaging.
Return procedure for 74HCT2G02DC,125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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