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Texas Instruments SN74AHCT1G02DBVR
- Part No.:
- SN74AHCT1G02DBVR
- Manufacturer:
- Texas Instruments
- Category:
- Gates and Inverters
- Package:
- SC-74A, SOT-753
- Datasheet:
-
SN74AHCT1G02DBVR.pdf
- Description:
- IC GATE NOR 1CH 2-INP SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:13,912
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Product details
Overview
SN74AHCT1G02DBVR from Texas Instruments is a single 2-input positive-NOR gate logic IC operating at 4.5 V–5.5 V, delivering 6.5 ns max propagation delay at 5 V, ±8 mA output drive, TTL-compatible inputs, and 10 µA max ICC. It performs Y = A + B (positive logic) and is used in digital enable/disable control, LED driver interfacing, and level translation between communication modules and controllers.
For engineers reviewing the SN74AHCT1G02DBVR datasheet, SN74AHCT1G02DBVR pinout, SN74AHCT1G02DBVR application, or SN74AHCT1G02DBVR equivalent, key selection criteria include its SOT-23-5 package, guaranteed 5-V operation with TTL input thresholds, low-power static consumption, and verified NOR logic function for signal gating and reset conditioning in industrial and embedded systems.
Technical Context
The SN74AHCT1G02DBVR implements a single CMOS-based positive-NOR gate with Schmitt-trigger–free inputs (confirmed by functional table and absence of hysteresis specs), supporting standard TTL voltage levels (VIL ≤ 0.8 V, VIH ≥ 2 V). Its output stage uses complementary push-pull MOSFETs capable of sourcing/sinking ±8 mA at 5 V while maintaining VOL ≤ 0.44 V and VOH ≥ 3.8 V under load.
It operates across –40°C to +85°C with supply voltage tightly constrained to 4.5–5.5 V; absolute maximum ratings prohibit operation outside –0.5 V to 7 V on any pin. Input clamp diodes and latch-up immunity (>250 mA per JESD17) support robustness in noisy or transient-prone environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Single 2-input positive-NOR: Y = A + B (active-low output when either input is high) |
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with 5-V TTL/CMOS systems; no 3.3-V operation supported |
| Propagation Delay | 6.5 ns max (tPLH/tPHL, CL = 15 pF, VCC = 5 V) - enables reliable timing in sub-100-MHz digital control paths |
| Output Drive | ±8 mA at 5 V - sufficient to directly drive LEDs, small logic loads, or interface with standard CMOS/TTL inputs |
| Input Compatibility | TTL-voltage compatible (VIH ≥ 2 V, VIL ≤ 0.8 V) - accepts legacy 5-V TTL outputs without level shifting |
| Quiescent Current | 10 µA max ICC - supports low-static-power designs in battery-backed or always-on subsystems |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded applications including motor control and sensor interfaces |
Pinout & Package
SOT-23-5 (DBV) package: 2.8 mm × 2.8 mm footprint with gull-wing leads, moisture sensitivity level 1 (260°C peak reflow), RoHS-compliant with Sn lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A) | Input A | Primary logic input; must be driven to VCC or GND - floating inputs cause undefined output and increased power |
| 2 (B) | Input B | Secondary logic input; shares same electrical specs and termination requirements as Pin 1 |
| 3 (GND) | Ground Reference | Return path for all internal currents; requires low-impedance connection to system ground plane |
| 4 (Y) | Output Y | Push-pull NOR output; drives high (≥3.8 V @ –8 mA) or low (≤0.44 V @ 8 mA) based on A/B states |
| 5 (VCC) | Power Supply | 5-V nominal supply input; requires local 0.1-µF bypass capacitor placed adjacent to pin for noise suppression |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed 5-V operation | Validated across full 4.5–5.5 V range with stable VOH/VOL and timing - eliminates need for external regulators in 5-V rails |
| TTL-compatible inputs | Accepts standard TTL output voltages (0.8 V/2.0 V thresholds) without level-shifting circuitry - simplifies interconnection with legacy logic |
| Low quiescent current | 10 µA max ICC enables use in power-sensitive applications such as standby-mode controllers or remote sensors |
| Robust ESD protection | ±2000 V HBM and ±1000 V CDM - exceeds JEDEC standards for handling and board-level reliability |
| Latch-up immunity | Exceeds 250 mA per JESD17 - prevents destructive failure during transient overvoltage or ground bounce events |
Applications
| Motor Controller Reset Conditioning | LED Enable/Disable Interface |
|---|---|
|
Use Scenario: Combines multiple fault signals (over-temperature, over-current, power-good) into a single active-low RESET line for a motor controller IC. IC Role / Device Role / Timing Role: NOR gate implements active-low OR logic: RESET asserts when any input goes high, ensuring immediate shutdown on fault detection. Use Value: Eliminates need for discrete diode-OR or additional logic; leverages guaranteed 6.5 ns delay to meet tight reset timing budgets in real-time motion control. |
Use Scenario: Controls illumination of status indicator LEDs based on dual enable conditions (e.g., power-on AND communication-ready). IC Role / Device Role / Timing Role: NOR gate provides inverted logic: LED turns ON only when both inputs are low - matches common anode LED drive topology. Use Value: Uses built-in ±8 mA drive to sink LED current directly; avoids external transistor stage and reduces BOM count and PCB area. |
| Communication Module Translation | Digital Signal Gating |
|
Use Scenario: Bridges UART or SPI control lines between a 5-V microcontroller and a 5-V peripheral requiring inverted handshake signaling. IC Role / Device Role / Timing Role: Performs level-consistent inversion and signal conditioning without voltage translation - maintains 5-V logic swing integrity. Use Value: TTL-compatible inputs accept MCU GPIO outputs directly; push-pull output ensures clean edges into capacitive bus loads up to 50 pF. |
Use Scenario: Enables/disables clock or data paths in test equipment or programmable logic interfaces using two independent control signals. IC Role / Device Role / Timing Role: Acts as synchronous gate: output is low unless both controls are low - provides fail-safe default-off behavior. Use Value: 10 µA max ICC minimizes standby leakage; SOT-23-5 package allows placement near signal sources to reduce stub length and EMI. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NOR gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G02DBVR | Wider supply range (1.65–5.5 V); lower drive (±24 mA @ 3.3 V, but only ±4 mA @ 5 V); higher ICC (max 10 µA same, but higher dynamic current) | Supports mixed-voltage systems (e.g., 3.3-V MCU driving 5-V peripherals) but exhibits reduced noise margin and slower edge rates at 5 V | Choose when multi-rail compatibility or lower voltage operation is required; verify VOL/VOH margins at actual VCC |
| MC74VHC1G02DTT1G | Same 5-V operation; slightly faster (5.5 ns typ tPD); higher ICC (max 2 µA, not 10 µA); different pinout (Pin 1 = VCC, Pin 2 = A, Pin 3 = B, Pin 4 = Y, Pin 5 = GND) | Requires PCB layout revision due to swapped VCC/GND pins; better suited for high-speed timing-critical paths where 1 ns reduction matters | Use only if layout allows pinout change and speed gain justifies requalification; not drop-in compatible with SN74AHCT1G02DBVR |
Compared with SN74AHCT1G02DBVR, SN74LVC1G02DBVR offers voltage flexibility at the cost of 5-V drive strength and noise immunity, while MC74VHC1G02DTT1G improves speed but mandates board redesign - making SN74AHCT1G02DBVR optimal for fixed 5-V industrial control where pin compatibility and proven robustness are prioritized.
Availability
SN74AHCT1G02DBVR is available at Aetrix Electronics and suitable for motor controller reset conditioning, LED enable/disable interfaces, and communication module translation requiring stable component supply, industrial temperature support, and guaranteed 5-V logic performance.
Supply support for SN74AHCT1G02DBVR 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 specializing in analog, embedded processing, and logic solutions, with decades of experience in high-reliability industrial and automotive IC design.
The SN74AHCT1G02DBVR belongs to TI's AHCT logic family, engineered specifically for 5-V TTL-compatible applications demanding low power, fast switching, and robust noise immunity in industrial control, instrumentation, and power management systems.
FAQ
What logic function does the SN74AHCT1G02DBVR implement?
The SN74AHCT1G02DBVR implements a single 2-input positive-NOR gate, performing the Boolean function Y = A + B in positive logic - meaning the output is low when either input A or B is high, and high only when both inputs are low. This behavior is confirmed in the device functional table and applies strictly to the SN74AHCT1G02DBVR under recommended operating conditions of 4.5–5.5 V and –40°C to +85°C.
Can the SN74AHCT1G02DBVR operate at 3.3 V?
No, the SN74AHCT1G02DBVR cannot reliably operate at 3.3 V. Its recommended operating supply voltage is strictly 4.5 V to 5.5 V, and electrical characteristics including VOH, VOL, and propagation delay are only specified and guaranteed within that range. Attempting 3.3-V operation may result in marginal or non-functional behavior, especially with TTL-compatible input thresholds requiring ≥2 V for high-level recognition.
What is the maximum capacitive load the SN74AHCT1G02DBVR can drive while meeting datasheet specs?
The SN74AHCT1G02DBVR is characterized and guaranteed to meet all switching and DC specifications with a load capacitance of up to 50 pF, as documented in the Switching Characteristics table for tPLH/tPHL measurements. Driving larger capacitive loads is possible but may degrade propagation delay, increase power consumption, and risk timing violations - TI explicitly recommends keeping total load ≤50 pF for optimal performance in the Application Information section.
How should unused inputs be handled on the SN74AHCT1G02DBVR?
All unused inputs on the SN74AHCT1G02DBVR must be terminated to either VCC or GND to prevent floating nodes, which cause increased ICC, unpredictable output states, and potential device malfunction. TI specifies this requirement in Section 5.3 Recommended Operating Conditions and reinforces it in the Application Information section - direct connection (not pull-up/down resistors) is preferred unless dynamic switching is anticipated, in which case a 10-kΩ resistor is commonly used.
Is the SN74AHCT1G02DBVR pin-compatible with other 5-pin SOT-23 logic gates?
The SN74AHCT1G02DBVR uses the standard SOT-23-5 pinout (Pin 1 = A, Pin 2 = B, Pin 3 = GND, Pin 4 = Y, Pin 5 = VCC), matching TI's AHCT, AHC, and LVC single-gate families in DBV packaging. However, pin compatibility does not guarantee functional or electrical equivalence - for example, MC74VHC1G02DTT1G uses a different pinout (VCC on Pin 1), so physical replacement requires verification of both pin mapping and logic behavior before substitution.
SN74AHCT1G02DBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHCT
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- NOR Gate
- Number of Circuits:
- 1
- Number of Inputs:
- 2
- Features:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Max):
- 1 µA
- Current - Output High, Low:
- 8mA, 8mA
- Input Logic Level - Low:
- 0.8V
- Input Logic Level - High:
- 2V
- Max Propagation Delay @ V, Max CL:
- 7.5ns @ 5V, 50pF
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
SN74AHCT1G02DBVR FAQ
1.How can I place an order for SN74AHCT1G02DBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHCT1G02DBVR 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 SN74AHCT1G02DBVR reliable?
The price and inventory of SN74AHCT1G02DBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHCT1G02DBVR is usually 5 days.
3.What payment methods are accepted for SN74AHCT1G02DBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHCT1G02DBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AHCT1G02DBVR?
SN74AHCT1G02DBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHCT1G02DBVR 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 SN74AHCT1G02DBVR?
For technical support, including SN74AHCT1G02DBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHCT1G02DBVR requirements.
6.How does Aetrix verify that SN74AHCT1G02DBVR is sourced from the original manufacturer or authorized distributors?
All SN74AHCT1G02DBVR 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 SN74AHCT1G02DBVR meets industry standards.
7.What is the process for return or replacement of SN74AHCT1G02DBVR?
All SN74AHCT1G02DBVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHCT1G02DBVR, 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 SN74AHCT1G02DBVR part is unused and in its original packaging.
Return procedure for SN74AHCT1G02DBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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