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onsemi 74HC02DR2G
- Part No.:
- 74HC02DR2G
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74HC02DR2G.pdf
- Description:
- IC GATE NOR 4CH 2-INP 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,602
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Product details
Overview
74HC02DR2G from onsemi is a quad 2-input NOR gate in high-performance silicon-gate CMOS technology, pin-compatible with LS02. It operates from 2.0 V to 6.0 V, delivers ±25 mA output drive per pin, and supports LSTTL and CMOS interfacing. Used in digital logic control, reset generation, and enable/disable circuitry for industrial controllers.
For engineers reviewing the 74HC02DR2G datasheet, pinout, applications, or equivalent options, key selection criteria include supply voltage range (2.0–6.0 V), propagation delay (13 ns at 6.0 V), input compatibility with LSTTL/CMOS, SOIC-14 packaging, and Pb-free compliance.
Technical Context
The 74HC02DR2G implements four independent NOR gates using silicon-gate CMOS process, ensuring low static power consumption and high noise immunity. Each gate features complementary MOSFET pairs with rail-to-rail output swing and defined logic thresholds (VIH = 4.2 V, VIL = 1.8 V at VCC = 6.0 V).
It meets JEDEC Standard No. 7A and supports operation across –55 °C to +125 °C. Input leakage is ≤±1.0 µA at 6.0 V, and quiescent ICC is ≤40 µA at 6.0 V - enabling use in battery-backed and thermally demanding embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 6.0 V - enables direct interface with 3.3 V and 5 V logic domains without level shifters. |
| Propagation Delay (tPLH/tPHL) | 13 ns max at VCC = 6.0 V, CL = 50 pF - suitable for sub-30 MHz combinational logic timing paths. |
| Output Drive | ±25 mA per pin - drives up to 10 LSTTL loads or directly interfaces with NMOS/CMOS/TTL inputs. |
| Input Thresholds | VIH = 4.2 V, VIL = 1.8 V at VCC = 6.0 V - ensures robust noise margin (>1.2 V) in noisy industrial environments. |
| Operating Temperature | –55 °C to +125 °C - qualified for under-hood automotive, motor control, and industrial PLC applications. |
| ESD Rating | HBM 2000 V - reduces risk of handling damage during manual assembly or field service. |
Pinout & Package
74HC02DR2G is supplied in a 14-pin SOIC package (Case 751A), 3.9 mm wide, with standard 1.27 mm pitch. Pin 1 is marked by a notch or bevel; pin 7 is GND, pin 14 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 8, 11 | Input A of NOR gate 1–4 | Active-high logic input; must be tied to VCC or GND if unused to prevent floating node instability. |
| 2, 6, 9, 12 | Input B of NOR gate 1–4 | Second active-high input per gate; dual-input NOR function requires both low for high output. |
| 3, 4, 10, 13 | Output Y of NOR gate 1–4 | CMOS push-pull output; sinks or sources current depending on logic state; open-drain not supported. |
| 7 | GND | Ground reference for all inputs, outputs, and internal circuitry; requires low-impedance connection. |
| 14 | VCC | Positive supply rail; decoupling capacitor (0.1 µF ceramic) recommended within 5 mm of this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Pb-free SOIC-14 package | Complies with RoHS Directive 2011/65/EU; compatible with lead-free reflow profiles (peak 260 °C). |
| LSTTL and CMOS input compatibility | Accepts TTL-level inputs when pulled up; eliminates need for external level-shifting resistors in mixed-logic systems. |
| Low quiescent current | ICC ≤ 40 µA at 6.0 V and 125 °C - extends battery life in always-on monitoring circuits. |
| High noise immunity | CMOS threshold ratios and >1.2 V noise margin reduce susceptibility to EMI in motor-drive or switching-power environments. |
Applications
| Industrial Control Logic | Power Sequencing |
|---|---|
|
Use Scenario: Generating synchronized enable/disable signals for multiple DC-DC converters in programmable logic controllers. IC Role / Device Role / Timing Role: Quad NOR gate provides combinatorial logic for sequencing start-up order and fault interlocks. Use Value: Propagation delay ≤13 ns ensures deterministic timing alignment across four independent power rails. |
Use Scenario: Implementing hardware-based reset hold-off and release timing in embedded microcontroller subsystems. IC Role / Device Role / Timing Role: NOR gate configured as active-low latch to extend reset pulse width beyond processor's internal timer. Use Value: Guaranteed VIH/VIL margins ensure reliable assertion even with noisy supply ramp-up transients. |
| Motor Driver Interface | Legacy System Glue Logic |
|
Use Scenario: Translating direction and enable commands from MCU GPIO into isolated gate-driver enable signals for H-bridge FETs. IC Role / Device Role / Timing Role: NOR gate combines direction and PWM enable to prevent shoot-through during state transitions. Use Value: ±25 mA output drive directly drives optocoupler LEDs or small-signal MOSFET gates without buffer stages. |
Use Scenario: Replacing obsolete 74LS02 in legacy test equipment where board space and thermal budget preclude redesign. IC Role / Device Role / Timing Role: Pin-identical drop-in replacement preserving existing PCB layout and firmware logic mapping. Use Value: Identical pinout to LS02 and full LSTTL compatibility eliminate signal integrity or timing validation overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad NOR gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC02N | Same logic function and SOIC-14 package; TI version rated for 0 °C to +70 °C only (commercial temp grade). | Not qualified for extended temperature industrial or automotive use; unsuitable for operation below –40 °C or above +85 °C. | Select only for cost-sensitive commercial-grade applications with ambient < 70 °C and no thermal cycling stress. |
| MC74HC02AD | Identical onsemi part number prefix; same specs and qualification, but shipped in tube (not tape-and-reel) packaging. | No functional difference; differs only in logistics format - unsuitable for automated SMT placement without reel conversion. | Choose 74HC02DR2G for high-volume pick-and-place assembly; MC74HC02AD only for prototyping or low-volume hand soldering. |
Compared with SN74HC02N and MC74HC02AD, the 74HC02DR2G uniquely combines industrial temperature range (–55 °C to +125 °C), Pb-free SOIC-14 tape-and-reel packaging, and full JEDEC 7A compliance - making it the only option qualified for automotive under-hood and harsh-environment industrial deployment.
Availability
74HC02DR2G is available at Aetrix Electronics and suitable for industrial control logic, power sequencing, and motor driver interface applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 74HC02DR2G 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient electronics, serving automotive, industrial, cloud, and medical markets with discrete, analog, and logic solutions.
The 74HC02DR2G belongs to the HC (High-Speed CMOS) logic family, designed for low-power, high-noise-immunity digital interfacing in industrial automation, motor control, and legacy system upgrades.
FAQ
What is the maximum operating temperature for the 74HC02DR2G?
The 74HC02DR2G is fully specified from –55 °C to +125 °C across all electrical parameters. This industrial temperature rating is confirmed in the "Recommended Operating Conditions" table of the official datasheet (Rev. 1, March 2007), and applies to both SOIC and TSSOP variants of the 74HC02 family. The 74HC02DR2G maintains guaranteed VOH, VOL, and propagation delay performance throughout this full range.
Is the 74HC02DR2G pin-compatible with the 74LS02?
Yes - the 74HC02DR2G is explicitly stated in its datasheet to be identical in pinout to the 74LS02. Pin assignments match exactly: inputs A1/B1–A4/B4 and outputs Y1–Y4 occupy identical positions, with VCC on pin 14 and GND on pin 7. This allows direct replacement in legacy LS designs without PCB modification, provided voltage and timing constraints are verified.
Does the 74HC02DR2G support 3.3 V logic systems?
Yes - the 74HC02DR2G operates down to 2.0 V, making it fully compatible with 3.3 V systems. At VCC = 3.3 V, VIH is guaranteed ≥2.1 V and VIL ≤0.9 V, providing >1.2 V noise margin. Output VOH ≥3.2 V and VOL ≤0.26 V at 3.3 V ensure reliable interfacing with other 3.3 V CMOS devices without level shifting.
What is the output drive capability of the 74HC02DR2G?
The 74HC02DR2G delivers ±25 mA DC output current per pin, sufficient to drive 10 LSTTL loads. This is specified in the "Maximum Ratings" table (Iout = ±25 mA) and confirmed under load conditions in the DC Electrical Characteristics table (e.g., VOH = 2.48 V at |Iout| = 2.4 mA, VCC = 3.0 V). The 74HC02DR2G does not support open-drain or three-state operation.
Is the 74HC02DR2G RoHS-compliant and Pb-free?
Yes - the "G" suffix in 74HC02DR2G explicitly denotes Pb-free packaging, confirmed in the Marking Diagram and Ordering Information sections of the datasheet. The device complies with JEDEC Std. No. 7A and meets RoHS Directive 2011/65/EU requirements. Lead finish is matte tin, qualified for standard lead-free reflow profiles with peak temperature up to 260 °C.
74HC02DR2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74HC
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- NOR Gate
- Number of Circuits:
- 4
- Number of Inputs:
- 2
- Features:
- -
- Voltage - Supply:
- 2V ~ 6V
- Current - Quiescent (Max):
- 2 µA
- Current - Output High, Low:
- 5.2mA, 5.2mA
- Input Logic Level - Low:
- 0.5V ~ 1.8V
- Input Logic Level - High:
- 1.5V ~ 4.2V
- Max Propagation Delay @ V, Max CL:
- 13ns @ 6V, 50pF
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
74HC02DR2G FAQ
1.How can I place an order for 74HC02DR2G through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC02DR2G 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 74HC02DR2G reliable?
The price and inventory of 74HC02DR2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC02DR2G is usually 5 days.
3.What payment methods are accepted for 74HC02DR2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC02DR2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC02DR2G?
74HC02DR2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC02DR2G 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 74HC02DR2G?
For technical support, including 74HC02DR2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC02DR2G requirements.
6.How does Aetrix verify that 74HC02DR2G is sourced from the original manufacturer or authorized distributors?
All 74HC02DR2G 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 74HC02DR2G meets industry standards.
7.What is the process for return or replacement of 74HC02DR2G?
All 74HC02DR2G units undergo pre-shipment inspection (PSI). If there is an issue with 74HC02DR2G, 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 74HC02DR2G part is unused and in its original packaging.
Return procedure for 74HC02DR2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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