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STMicroelectronics M74HC02TTR
- Part No.:
- M74HC02TTR
- Manufacturer:
- STMicroelectronics
- Category:
- Gates and Inverters
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
M74HC02TTR.pdf
- Description:
- IC GATE NOR 4CH 2-INP 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,533
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Product details
Overview
M74HC02TTR from STMicroelectronics is a high-speed CMOS quad 2-input NOR gate in TSSOP-14 package, operating from 2V to 6V supply, with typical propagation delay of 8ns at 6V, symmetrical output drive (±4mA), and high noise immunity (28% VCC). It serves as a fundamental logic building block in digital control, interface translation, and reset signal conditioning circuits.
For engineers reviewing the M74HC02TTR datasheet, M74HC02TTR pinout, M74HC02TTR application, or M74HC02TTR equivalent, this page delivers verified electrical specs, validated pin functions, real-world use cases in industrial control and embedded timing, and confirmed drop-in alternatives for legacy 74-series logic upgrades.
Technical Context
The M74HC02TTR implements four independent 2-input NOR gates using silicon gate C2MOS technology, with three-stage buffered outputs ensuring stable switching and high noise rejection. Its input protection circuitry includes ESD and transient voltage suppression on all pins.
It operates across an extended temperature range (–55°C to +125°C) and supports rail-to-rail input/output swing (0 to VCC), with matched tPLH and tPHL delays enabling precise timing in synchronous logic networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2V to 6V - Enables direct interfacing with 3.3V and 5V logic families without level shifters. |
| tPD (Typ.) | 8ns at VCC = 6V - Supports >100 MHz toggle rates in critical path logic stages. |
| IOL / IOH | ±4mA minimum - Drives standard TTL loads and multiple 74HC inputs reliably. |
| VNIH / VNIL | 28% VCC minimum - Resists noise spikes up to ±1.68V at 6V supply, improving system robustness. |
| ICC (Max) | 1µA at TA = 25°C - Enables ultra-low static power in battery-backed or always-on logic circuits. |
| Operating Temp | –55°C to +125°C - Qualified for automotive under-hood and industrial motor-control environments. |
| CIN | 5pF typical - Minimizes capacitive loading on driving gates, preserving signal edge integrity. |
Pinout & Package
TSSOP-14 package: 4.9 × 6.4 mm body, 0.65 mm pitch, 14-pin surface-mount, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | 1Y, 2Y, 3Y, 4Y | Active-low NOR gate outputs - Sourcing/sinking capability enables wired-OR and active-low enable functions. |
| 2, 5, 8, 11 | 1A, 2A, 3A, 4A | First input per gate - Accepts 0–VCC logic levels; internal clamp diodes protect against overvoltage transients. |
| 3, 6, 9, 12 | 1B, 2B, 3B, 4B | Second input per gate - Fully compatible with 74-series logic thresholds and fan-out rules. |
| 7 | GND | Ground reference - Shared return path for all four gates; requires low-impedance PCB connection. |
| 14 | VCC | Positive supply - Decoupling capacitor (100nF) recommended within 5 mm for stable high-speed operation. |
Key Features
| Feature | Design Value |
|---|---|
| Quad 2-input NOR architecture | Four independent gates in one package - Reduces board space and interconnect complexity vs discrete solutions. |
| Pin- and function-compatible with 74 series 02 | Direct replacement for legacy TTL/LS logic - No redesign needed when upgrading to CMOS performance and power efficiency. |
| Symmetrical output impedance | |IOH| = IOL ≥ 4mA - Ensures consistent rise/fall times and eliminates skew in clock distribution or bus arbitration. |
| Wide VCC range (2–6V) | Single part supports mixed-voltage systems - Eliminates need for separate 3.3V and 5V logic families in same design. |
| Input protection circuitry | ESD and transient voltage clamping - Withstands ±20mA input diode current, enhancing reliability in noisy industrial environments. |
Applications
| Industrial PLC Input Conditioning | Automotive Body Control Module Logic |
|---|---|
Use Scenario: Converting mechanical switch closures into clean, debounced logic signals for microcontroller GPIO inputs. IC Role / Device Role / Timing Role: NOR gate used in active-low latch and debounce configuration with RC network. Use Value: High noise immunity (28% VCC) rejects EMI from solenoids and motors; low ICC (<1µA) extends battery life in sleep-mode monitoring. | Use Scenario: Generating priority-encoded fault flags (e.g., door open + key-in-ignition → disable start). IC Role / Device Role / Timing Role: Combinational logic element implementing safety-critical OR-NOT logic in fail-safe decision tree. Use Value: –55°C to +125°C rating ensures operation under hood; symmetrical tPLH/tPHL prevents metastability in multi-signal arbitration. |
| Embedded System Reset Sequencing | Legacy Equipment Interface Adapter |
Use Scenario: Combining power-good, watchdog timeout, and manual reset signals into a single system-wide reset pulse. IC Role / Device Role / Timing Role: Active-low NOR gate acting as reset signal combiner with inverted logic polarity. Use Value: Rail-to-rail VOH/VOL (0–VCC) guarantees compatibility with both 3.3V and 5V MCUs; 8ns tPD enables sub-100ns reset assertion timing. | Use Scenario: Adapting vintage 74LS02-based control panels to modern microcontroller I/O with updated voltage levels. IC Role / Device Role / Timing Role: Drop-in logic replacement preserving original PCB layout and firmware logic equations. Use Value: Pin- and function-compatibility with 74 series eliminates board rework; 2–6V VCC range bridges 5V legacy and 3.3V MCU domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 2-input NOR gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC02DR | TI part in SOIC-14; identical AC/DC specs but higher max ICC (20µA) at 125°C. | SOIC package requires different footprint; thermal resistance higher than TSSOP. | Preferred for through-hole prototyping or where SOIC handling is standardized. |
| 74AHC02PW,118 | NXP part in TSSOP-14; faster tPD (5.2ns typ. at 5V), but narrower VCC range (2–5.5V). | Marginally better speed, but not rated for full 6V operation or –55°C. | Best for high-speed 3.3V/5V systems where extended temp or 6V headroom is unnecessary. |
Compared with SN74HC02DR and 74AHC02PW,118, the M74HC02TTR uniquely combines 6V absolute max supply, –55°C rating, and TSSOP-14 compactness-making it optimal for ruggedized, mixed-voltage industrial designs requiring long-term availability.
Availability
M74HC02TTR is available at Aetrix Electronics and suitable for industrial PLC input conditioning, automotive body control modules, embedded system reset sequencing, and legacy equipment interface adapters requiring stable component supply and long-lifecycle support.
Supply support for M74HC02TTR 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, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.
The M74HC02 belongs to ST's high-speed CMOS logic family, engineered for pin-compatible upgrades from legacy 74-series devices while delivering lower power, wider voltage range, and enhanced noise immunity in industrial and automotive control systems.
FAQ
Is M74HC02TTR compatible with 5V TTL logic inputs?
Yes. The M74HC02TTR accepts TTL-level inputs (VIH ≥ 2.0V, VIL ≤ 0.8V) across its full 2–6V VCC range. At VCC = 5V, VIH(min) = 3.15V and VIL(max) = 1.35V per datasheet, exceeding standard TTL thresholds and ensuring reliable interfacing without external level shifters.
What is the maximum output current per gate when driving capacitive loads?
Each output can source or sink up to ±4mA continuously (IOL/IOH min), sufficient for driving 10–15 74HC inputs or 1–2 standard TTL loads. For heavier capacitive loads (>50pF), propagation delay increases slightly but remains within spec up to CL = 100pF per AC characterization data.
Does M74HC02TTR support 3.3V-only operation?
Yes. It is fully specified down to VCC = 2V, with guaranteed VOH ≥ 3.15V and VOL ≤ 0.26V at VCC = 3.3V and IOL = 4mA. This makes it suitable for direct connection to 3.3V microcontrollers and FPGAs without level translation.
Can M74HC02TTR be used in place of obsolete 74LS02 in existing designs?
Yes - with minor validation. It matches 74LS02 pinout and logic function, offers superior noise immunity and lower power, and operates at the same 5V nominal supply. Verify timing margins due to faster propagation (8ns vs ~15ns) and ensure input transition times meet tr/tf limits (≤400ns at 6V) to avoid glitches.
M74HC02TTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74HC
- Package/Case:
- 14-TSSOP (0.173", 4.40mm 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):
- 1 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-TSSOP
M74HC02TTR FAQ
1.How can I place an order for M74HC02TTR through Aetrix?
Please submit a Request for Quotation (RFQ) for M74HC02TTR 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 M74HC02TTR reliable?
The price and inventory of M74HC02TTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M74HC02TTR is usually 5 days.
3.What payment methods are accepted for M74HC02TTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M74HC02TTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M74HC02TTR?
M74HC02TTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M74HC02TTR 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 M74HC02TTR?
For technical support, including M74HC02TTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M74HC02TTR requirements.
6.How does Aetrix verify that M74HC02TTR is sourced from the original manufacturer or authorized distributors?
All M74HC02TTR 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 M74HC02TTR meets industry standards.
7.What is the process for return or replacement of M74HC02TTR?
All M74HC02TTR units undergo pre-shipment inspection (PSI). If there is an issue with M74HC02TTR, 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 M74HC02TTR part is unused and in its original packaging.
Return procedure for M74HC02TTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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