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SN74HC02DR

Quad 2-input NOR gate, 2-6V, 5.2mA drive, 10-50ns tpd, SOIC-14

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جزء الشركة المصنعة ： جزء الشركة المصنعة

SN74HC02DR

الحزمة ： الحزمة

SOIC-14 (8.65 x 3.90 x 1.58 mm, D package)

العلامة التجارية ： العلامة التجارية
فئات المنتجات:：فئات المنتجات
الالتزام بالجودة
الشحن والدفع
الخدمة والتغليف
دليل المنتج
توصيات أخرى قد تكون مهتماً بها.

LM393AP

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LM358AP

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الوصف

نظرة عامة على المنتج

The SN74HC02DR from Texas Instruments is a quadruple 2-input positive NOR gate in a 14-pin SOIC package, operating from 2V to 6V with 5.2mA output drive and 10-50ns propagation delay.

المواصفات الرئيسية

Logic Function Quad 2-Input NOR Gate
Number of Gates 4
جهد الإمداد 2V to 6V
Output Drive Current 5.2 mA (sink/source)
تأخير الانتشار 10-50 ns (typ, VCC=4.5V)
نوع الإدخال CMOS قياسي
نوع الإخراج Push-Pull
Logic Function (positive) Y = NOT(A OR B)
ESD Protection HBM >2000V, CDM >1000V
الحزمة SOIC-14 (8.65 x 3.90mm)
درجة حرارة التشغيل -40 to +85 C

الميزات

  • Four independent 2-input NOR gates
  • Buffered inputs for improved noise immunity
  • Wide 2V to 6V operating voltage range
  • Supports fanout to 10 LSTTL loads
  • Significant power reduction vs LSTTL
  • Latch-up performance >100mA per JESD 78

التطبيقات

  • SR latch circuits (NOR gates for set-reset)
  • Alarm and tamper detection circuits
  • Logic inversion and OR functions
  • General-purpose digital logic

The SN74HC02DR from Texas Instruments is a quadruple 2-input positive NOR gate from the 74HC (High-Speed CMOS) logic family. The device contains four independent NOR gates, each performing the Boolean function Y = NOT(A OR B) in positive logic, or equivalently Y = A NOR B. The NOR gate is one of the universal logic gates, meaning any combinational or sequential logic function can be implemented using only NOR gates. A common application is the SR (Set-Reset) latch, where two cross-coupled NOR gates form a basic memory element with Set and Reset inputs. The 74HC family operates from a wide supply voltage range of 2V to 6V, making it compatible with 3.3V and 5V logic systems. Buffered inputs provide improved noise immunity compared to unbuffered designs, with CMOS input thresholds at approximately 50% of VCC. The output can sink or source up to 5.2mA, sufficient to drive up to 10 LSTTL loads or multiple CMOS inputs. The propagation delay of 10-50ns (depending on supply voltage) supports data rates up to 28Mbps. The SOIC-14 surface-mount package (DR suffix) is suitable for automated PCB assembly. The device features latch-up immunity exceeding 100mA per JESD 78 Class II and ESD protection exceeding 2000V HBM and 1000V CDM.

The SN74HC02DR operates as four independent CMOS NOR gates. Key operating principles include: (1) NOR Gate Logic – each gate implements the function Y = NOT(A OR B); the output Y is LOW only when at least one input (A or B) is HIGH; the output Y is HIGH only when both inputs A and B are LOW; this truth table makes NOR gates useful for active-HO control signals and SR latch construction; (2) CMOS Complementary Output – each gate uses a PMOS/NMOS complementary output stage that actively drives both HIGH and LOW levels; this push-pull output provides rail-to-rail swing (VCC to GND) with low output impedance; the 5.2mA drive capability is symmetric for sourcing and sinking; (3) Buffered Input – each gate input includes a buffer stage (two inverters in series) before the core NOR logic; buffering increases the input threshold sharpness and noise immunity; the CMOS input draws essentially zero DC current (only leakage), allowing large fanout to other CMOS devices; (4) SR Latch – two NOR gates can be cross-coupled (output of each feeds an input of the other) to form an SR latch; Set (S=1, R=0) makes Q=1; Reset (S=0, R=1) makes Q=0; S=R=0 holds the previous state; S=R=1 is an invalid condition (both Q and not-Q go LOW); (5) Power Consumption – static power consumption is near zero (only leakage current, typically <1uA); dynamic power consumption is P = CPD x VCC^2 x f, where CPD is the power dissipation capacitance; this makes HC logic much more power-efficient than bipolar LSTTL.

دبوس الاسم الوظيفة
1 1Y Gate 1 output
2 1A Gate 1 input A
3 1B Gate 1 input B
4 2Y Gate 2 output
5 2A Gate 2 input A
6 2B Gate 2 input B
7 GND أرضي
8 3A Gate 3 input A
9 3B Gate 3 input B
10 3Y Gate 3 output
11 4A Gate 4 input A
12 4B Gate 4 input B
13 4Y Gate 4 output
14 VCC Supply voltage (2V to 6V)
  • SR latch: two NOR gates cross-coupled for debounced switch or power-on reset
  • Alarm detection: NOR gate detects when all sensors are inactive (all inputs LOW = alarm active)
  • Logic OR inversion: NOR gate followed by inverter creates OR function
  • Active-LOW control: NOR gate combines multiple active-HIGH fault signals into active-LOW shutdown
الشركة المصنعة رقم الجزء الحزمة الملاحظات
نيكسبيريا 74HC02D SOIC-14 Pin-compatible equivalent
TI SN74HC02PWR TSSOP-14 Smaller TSSOP package
TI SN74HC02N PDIP-14 Through-hole version
نيكسبيريا 74HCT02D SOIC-14 TTL-compatible input thresholds
TI CD4001BM SOIC-14 4000-series NOR gate, 3-15V
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العلامة التجارية:

الحزمة:

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متوفر في المخزون:
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دورة الشحن 3 ~ 7 أيام
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العلامة التجارية:

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متوفر في المخزون:
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دورة الشحن 3 ~ 7 أيام
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LM358N

Dual general-purpose op-amp, 3-32V single supply, 1MHz GBW, 8-PDIP

العلامة التجارية:

الحزمة:

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متوفر في المخزون:
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دورة الشحن 3 ~ 7 أيام
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74HC00N

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العلامة التجارية:

الحزمة:

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متوفر في المخزون:
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دورة الشحن 3 ~ 7 أيام
الحد الأدنى للطلب هو 1

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LM386N-3

Low-voltage 500mW audio amp, 4-12V, gain 20-200, 8-PDIP

العلامة التجارية:

الحزمة:

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متوفر في المخزون:
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دورة الشحن 3 ~ 7 أيام
الحد الأدنى للطلب هو 1

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NE555P

Precision timer, 4.5-16V, 200mA output, astable/monostable, PDIP-8

العلامة التجارية:

الحزمة:

PDIP-8 (9.81×6.35 mm, 2.54mm pitch, through-hole)
متوفر في المخزون:
11650pcs

دورة الشحن 3 ~ 7 أيام
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ضمان الجودة

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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China

 

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Tel / WhatsApp: +86 13760382860

الخدمة والتغليف

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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We specialize in a full range of passive and active electronic components, including SMD resistors, power resistors, connectors, aviation connectors, LED beads, flexible circuit boards, printed circuit boards, and integrated circuits. Our professional team provides BOM list consolidation, component matching, and alternative model recommendation services. We support sample orders, small-batch trial production, and mass production orders with flexible MOQs to meet diverse procurement needs.

2. Genuine Product Guarantee & Full-process Quality Inspection

All products are sourced from official authorized channels and are 100% original genuine parts. Every batch of goods undergoes strict full-process quality inspection before delivery, with complete batch records and traceability documents provided. Our products comply with AEC-Q standards for automotive electronics and high-reliability specifications for medical devices. We eliminate counterfeits, refurbished parts and defective products from the source to secure your project production.

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Contact Information

For service consultation or packaging customization, please feel free to contact us:
Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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