My Inquiry
My Account
Texas Instruments SN74HCS02PWR
- Part No.:
- SN74HCS02PWR
- Manufacturer:
- Texas Instruments
- Category:
- Gates and Inverters
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74HCS02PWR.pdf
- Description:
- IC GATE NOR 4CH 2-INP 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,914
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74HCS02PWR from Texas Instruments is a quadruple 2-input NOR gate IC with Schmitt-trigger inputs, performing Y = A + B logic in positive logic. It operates across 2V–6V supply, delivers ±7.8mA output drive at 6V, features 100nA typical ICC, and supports –40°C to +125°C ambient operation - used in tamper-detect circuits and S-R latch implementations.
For engineers reviewing the SN74HCS02PWR datasheet, SN74HCS02PWR pinout, SN74HCS02PWR application, or SN74HCS02PWR equivalent, key selection criteria include Schmitt-trigger noise immunity, wide VCC range compatibility, low static current, TSSOP-14 package constraints, and Boolean NOR functionality for level-sensitive control logic.
Technical Context
This device integrates four independent CMOS NOR gates with balanced push-pull outputs and hysteresis-enabled Schmitt-trigger inputs. Each gate accepts slow or noisy input transitions without oscillation due to ΔVT ≥ 0.55V (at 2V), while maintaining rail-to-rail VOH/VOL performance across its full operating voltage range.
The architecture supports direct interfacing with mixed-voltage systems: VIH/VIL thresholds scale with VCC (e.g., VT+ = 3.11V min at 6V), and output drive remains stable at ±7.8mA under 6V load - enabling reliable signal conditioning and latching in industrial sensor interfaces and security monitoring subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Quadruple 2-input NOR (Y = A + B) |
| Supply Voltage Range | 2V to 6V - enables direct interface with 3.3V and 5V logic domains without level shifters |
| Input Hysteresis (ΔVT) | Min 0.55V at 2V - rejects noise up to 550mV peak-to-peak on slow-rising inputs |
| Output Drive | ±7.8mA at 6V - sufficient to directly drive LEDs or small logic loads without external buffers |
| Supply Current (ICC) | Typical 100nA at 6V - supports ultra-low-power battery-backed tamper detection |
| Operating Temperature | –40°C to +125°C - qualified for automotive under-hood and industrial control environments |
| Propagation Delay | 6ns typical at 6V - ensures sub-10ns timing margins for synchronous latch control paths |
Pinout & Package
PW package is a 14-pin TSSOP (5.00mm × 6.4mm body with pins), surface-mount, lead-free, RoHS-compliant, MSL Level 2a per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 1B, 2A, 2B, 3A, 3B, 4A, 4B | Inputs | Eight independent gate inputs - each pair drives one NOR function; all feature Schmitt-trigger hysteresis |
| 1Y, 2Y, 3Y, 4Y | Outputs | Four buffered NOR outputs - CMOS push-pull, capable of sourcing/sinking 7.8mA at 6V |
| VCC (Pin 14) | Power Supply | Positive supply rail - must be bypassed with 0.1µF capacitor near pin for stable switching |
| GND (Pin 7) | Ground Reference | Common return path - connects to system ground plane; unused outputs may float |
| All Unused Inputs | Termination Point | Must be tied to VCC or GND - floating inputs cause undefined logic states and increased ICC |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | Enables robust operation with slow or noisy signals - eliminates chatter on mechanical switch inputs like tamper detectors |
| Wide 2V–6V supply range | Supports single-supply operation across legacy 5V and modern 3.3V/2.5V systems without external regulators |
| Ultra-low ICC (100nA typ) | Extends battery life in always-on security monitoring - critical for long-term tamper-alert retention |
| ±7.8mA output drive | Directly drives indicator LEDs or small capacitive loads (<50pF) without external drivers |
| –40°C to +125°C operation | Validated for extended temperature use in automotive ECUs and industrial PLC I/O modules |
Applications
| Alarm or Tamper Detect Circuit | S-R Latch |
|---|---|
Use Scenario: Mechanical switch closure triggers immediate logic-level assertion to indicate physical intrusion or enclosure breach. IC Role / Device Role / Timing Role: SN74HCS02PWR acts as debounced signal conditioner and latch initiator - its Schmitt inputs reject contact bounce; NOR gates form cross-coupled latch core. Use Value: Eliminates need for external RC filters or microcontroller polling - reduces BOM count and firmware complexity in security subsystems. | Use Scenario: Set/Reset bistable storage for status flags where power loss must preserve state until explicit reset. IC Role / Device Role / Timing Role: SN74HCS02PWR implements dual-NOR S-R latch topology - two gates cross-connected to retain Q/Q̅ state without clock or enable signals. Use Value: Provides asynchronous, zero-latency memory element using only passive pull resistors - ideal for fault-locked indicators in safety-critical hardware. |
| Industrial Sensor Interface | Low-Power Logic Level Translation |
Use Scenario: Converting slow-rising analog comparator outputs or thermistor-based threshold crossings into clean digital signals. IC Role / Device Role / Timing Role: SN74HCS02PWR serves as hysteresis-enhanced signal conditioner - converts marginal analog edges into monotonic logic transitions. Use Value: Prevents false triggering from EMI or thermal drift - improves reliability of overtemperature or overpressure shutdown circuits. | Use Scenario: Interfacing 2.5V microcontroller GPIOs with 5V peripheral control lines in mixed-voltage embedded systems. IC Role / Device Role / Timing Role: SN74HCS02PWR functions as unidirectional level translator - leverages VCC-tolerant inputs and rail-swing outputs for voltage domain bridging. Use Value: Avoids dedicated level-shifter ICs - reduces cost and board space while maintaining timing integrity in control signal paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NOR gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCS02DR | SOIC-14 package (8.65mm × 6mm); higher RθJA (133.6°C/W) vs. PW's 151.7°C/W | Better suited for through-hole prototyping or high-reliability industrial PCBs with larger pad spacing | Select when manual soldering, thermal mass tolerance, or legacy footprint compatibility is required |
| SN74LVC02APWR | Lower VCC range (1.65V–5.5V); no Schmitt inputs; 24mA drive at 3.3V; faster tpd (3.9ns typ) | Optimized for high-speed 3.3V systems but lacks noise immunity for mechanical switch inputs | Choose for speed-critical digital logic where input signals are already clean and well-controlled |
Compared with SN74HCS02DR and SN74LVC02APWR, the SN74HCS02PWR uniquely combines Schmitt-trigger noise rejection, ultra-low ICC, and TSSOP-14 compactness - making it optimal for space-constrained, battery-powered tamper detection where signal integrity trumps raw speed.
Availability
SN74HCS02PWR is available at Aetrix Electronics and suitable for alarm systems, industrial sensor interfaces, and low-power logic level translation requiring stable component supply across automotive, industrial, and security electronics programs.
Supply support for SN74HCS02PWR 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
Texas Instruments is a global semiconductor leader delivering analog and embedded processing solutions, with over 90 years of innovation in precision logic, power management, and signal chain technologies.
The SN74HCS02PWR belongs to TI's HCS family of high-speed CMOS logic devices designed specifically for robust, low-power, noise-immune digital interfacing in harsh environments - targeting industrial automation, automotive sensing, and security systems.
FAQ
What is the maximum input transition rate supported by SN74HCS02PWR?
The SN74HCS02PWR has no specified minimum input transition rate because its Schmitt-trigger inputs tolerate arbitrarily slow edges. This allows direct connection to mechanical switches, thermistors, or RC-debounced signals without risk of metastability or oscillation - a key advantage over standard CMOS gates. The SN74HCS02PWR maintains correct logic evaluation even with rise/fall times exceeding milliseconds.
Can SN74HCS02PWR drive an LED directly?
Yes, SN74HCS02PWR can drive a standard 2mA LED directly when configured as an active-low sink: connect LED anode to VCC and cathode to an output pin (e.g., 1Y), with current limited by the device's VOL specification (0.22V max at 7.8mA, 6V). At 6V supply, a 330Ω series resistor yields ~11mA - within SN74HCS02PWR's ±7.8mA rating. For higher currents or multiple LEDs, external drivers are recommended.
What happens if an input pin on SN74HCS02PWR is left floating?
Leaving any input pin floating on SN74HCS02PWR causes undefined logic states, increased supply current (ICC), and potential device malfunction due to intermediate voltages triggering both NMOS and PMOS transistors simultaneously. TI explicitly requires all unused inputs to be tied to VCC or GND - either directly or via pull-up/pull-down resistors (e.g., 10kΩ). Floating inputs violate the Recommended Operating Conditions and compromise SN74HCS02PWR reliability.
Does SN74HCS02PWR support mixed-voltage operation between inputs and VCC?
No, SN74HCS02PWR does not support mixed-voltage operation: all inputs must remain within 0V to VCC, per the Recommended Operating Conditions. Input voltage exceeding VCC (even briefly) risks forward-biasing internal clamp diodes and violating Absolute Maximum Ratings. For interfacing with higher-voltage signals, external resistive dividers or dedicated level translators are required - SN74HCS02PWR itself must operate with VI ≤ VCC and VI ≥ 0V.
How does the Schmitt-trigger hysteresis of SN74HCS02PWR improve noise immunity?
SN74HCS02PWR's Schmitt-trigger inputs provide voltage hysteresis (ΔVT ≥ 0.55V at 2V), meaning the threshold for detecting a HIGH (VT+) is significantly higher than that for detecting a LOW (VT−). This creates a "dead band" that prevents multiple toggles when noise crosses a single threshold - essential for reliable operation with slow-switching sensors or long PCB traces. The SN74HCS02PWR thus rejects noise spikes up to ΔVT peak-to-peak amplitude without additional filtering.
SN74HCS02PWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HCS
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- NOR Gate
- Number of Circuits:
- 4
- Number of Inputs:
- 2
- Features:
- Schmitt Trigger Input
- Voltage - Supply:
- 2V ~ 6V
- Current - Quiescent (Max):
- 2 µA
- Current - Output High, Low:
- 7.8mA, 7.8mA
- Input Logic Level - Low:
- 1V ~ 3V
- Input Logic Level - High:
- 1.5V ~ 4.2V
- Max Propagation Delay @ V, Max CL:
- 12ns @ 6V, 50pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
SN74HCS02PWR FAQ
1.How can I place an order for SN74HCS02PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HCS02PWR 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 SN74HCS02PWR reliable?
The price and inventory of SN74HCS02PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HCS02PWR is usually 5 days.
3.What payment methods are accepted for SN74HCS02PWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HCS02PWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74HCS02PWR?
SN74HCS02PWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HCS02PWR 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 SN74HCS02PWR?
For technical support, including SN74HCS02PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HCS02PWR requirements.
6.How does Aetrix verify that SN74HCS02PWR is sourced from the original manufacturer or authorized distributors?
All SN74HCS02PWR 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 SN74HCS02PWR meets industry standards.
7.What is the process for return or replacement of SN74HCS02PWR?
All SN74HCS02PWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74HCS02PWR, 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 SN74HCS02PWR part is unused and in its original packaging.
Return procedure for SN74HCS02PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74HCS02PWR Tags
-
SN74LVC1G14DBVR
Texas Instruments
-
SN74LVC1G14DCKR
Texas Instruments
-
SN74AHC1G14DBVR
Texas Instruments
-
SN74LVC1G08DBVR
Texas Instruments
-
SN74LVC1G08DCKR
Texas Instruments
-
SN74LVC1G32DCKR
Texas Instruments
-
SN74LVC1G04DBVR
Texas Instruments
.jpg)
-
74LVC1G08GW,125
Nexperia USA Inc.
-
SN74LVC1G04DCKR
Texas Instruments
-
SN74AHC1G08DBVR
Texas Instruments
-
SN74LVC1G32DBVR
Texas Instruments
-
SN74AHCT1G08DBVR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
