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Nexperia USA Inc. 74HCT08DB,112
- Part No.:
- 74HCT08DB,112
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Gates and Inverters
- Package:
- 14-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74HCT08DB,112.pdf
- Description:
- IC GATE AND 4CH 2-INP 14SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,743
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Product details
Overview
74HCT08DB,112 from Nexperia is a quad 2-input AND gate IC with TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5 V), 4.5–5.5 V supply range, and SO14 (SOT108-1) package. It delivers propagation delay of 14–36 ns across temperature, supports -40 °C to +125 °C operation, and integrates input clamp diodes enabling safe interfacing to voltages exceeding VCC via current-limiting resistors - used in digital logic control layers of industrial PLC I/O modules.
For engineers reviewing the 74HCT08DB,112 datasheet, 74HCT08DB,112 pinout, 74HCT08DB,112 application, or 74HCT08DB,112 equivalent, key selection criteria include TTL-level input compatibility, SO14 thermal performance (Ptot = 500 mW @ ≤100 °C), guaranteed 4 mA output drive at 5 V, and JESD7A/JESD8C compliance for mixed-voltage system integration.
Technical Context
This device implements four independent AND gates in a single monolithic CMOS structure with TTL-level input voltage thresholds, enabling direct replacement of legacy 74LS08 in 5 V systems without level-shifting. Its input clamp diodes allow robust interfacing to higher-voltage signals when used with series current-limiting resistors.
Propagation delay (tpd) is specified from 14 ns (typ) to 36 ns (max) over full temperature and voltage range, with transition times (tt) under 22 ns. Static characteristics guarantee VIH ≥ 2.0 V and VIL ≤ 0.8 V at VCC = 4.5–5.5 V, ensuring reliable noise margin in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Quad 2-input AND gate - provides four independent Boolean AND operations per package. |
| Supply Voltage Range | 4.5 V to 5.5 V - matches standard TTL and 5 V microcontroller I/O rails without regulation. |
| Input Thresholds | VIH ≥ 2.0 V, VIL ≤ 0.8 V - ensures compatibility with 74LS/74F family outputs and avoids false triggering. |
| Output Drive | ±4.0 mA at VOH/VOL - sufficient to drive multiple 74HCT inputs or small LED loads directly. |
| Propagation Delay | 14–36 ns (VCC = 4.5–5.5 V, -40 °C to +125 °C) - enables use in sub-20 MHz synchronous control paths. |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood, motor drive, and industrial automation environments. |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - reduces handling sensitivity during PCB assembly and field service. |
Pinout & Package
74HCT08DB,112 uses the SO14 (SOT108-1) plastic small outline package: 14-lead, 3.9 mm body width, 1.27 mm lead pitch, and surface-mount construction optimized for reflow soldering and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 2A, 3A, 4A (Pins 1, 4, 9, 12) | First input of each AND gate | Accepts TTL-level logic signals; clamped to prevent overvoltage damage when used with external current-limiting resistors. |
| 1B, 2B, 3B, 4B (Pins 2, 5, 10, 13) | Second input of each AND gate | Independent input per gate; no internal coupling - allows flexible routing of asynchronous control signals. |
| 1Y, 2Y, 3Y, 4Y (Pins 3, 6, 8, 11) | Output of each AND gate | CMOS push-pull output capable of sourcing/sinking 4 mA; compatible with 74HCT, 74HC, and microcontroller inputs. |
| VCC (Pin 14) | Positive supply rail | Must be decoupled locally with 100 nF ceramic capacitor; accepts 4.5–5.5 V only (not 3.3 V or 2.5 V). |
| GND (Pin 7) | Reference ground | Common return path for all gates; requires low-impedance connection to system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | Enables drop-in replacement of 74LS08 in legacy 5 V systems without redesigning input interface networks. |
| Input clamp diodes | Allows safe connection to signals up to VCC + 0.5 V using series resistors - eliminates need for external protection diodes. |
| Wide temperature range | Rated from -40 °C to +125 °C - suitable for deployment in motor controllers, power supplies, and outdoor industrial enclosures. |
| Low quiescent current | ICC ≤ 40 μA max at VCC = 5.5 V - minimizes standby power in battery-backed or energy-sensitive applications. |
| JESD7A/JESD8C compliance | Meets JEDEC standards for 2.0–6.0 V and 2.7–3.6 V operation - ensures interoperability across mixed-supply logic families. |
Applications
| Industrial PLC I/O Expansion | Legacy System Logic Interface |
|---|---|
Use Scenario: Adding discrete safety interlock logic between field sensors and main controller in modular PLC backplanes. IC Role / Device Role / Timing Role: Performs real-time AND gating of dual-channel emergency stop signals before enabling actuator drivers. Use Value: Guarantees sub-36 ns response time and withstands 125 °C ambient in DIN-rail mounted enclosures without derating. |
Use Scenario: Interfacing 74LS-series address decoders to modern 5 V microcontrollers in retro-computing hardware restoration. IC Role / Device Role / Timing Role: Translates LS-compatible output levels to HCT-compatible inputs while preserving timing integrity. Use Value: Eliminates need for discrete level shifters; maintains <20 ns setup/hold margins on 8 MHz bus cycles. |
| Motor Control Enable Sequencing | Power Supply Sequencing Logic |
Use Scenario: Validating pre-charge completion and fault clearance before enabling three-phase inverter gate drivers. IC Role / Device Role / Timing Role: Combines isolated fault flags and soft-start timers into a single enable signal for high-side driver ICs. Use Value: Provides deterministic, glitch-free enable assertion with 4 mA drive strength into capacitive gate driver inputs. |
Use Scenario: Coordinating startup order of auxiliary 3.3 V and main 5 V rails in embedded power management subsystems. IC Role / Device Role / Timing Role: Gates 5 V rail enable based on both 3.3 V OK status and reset timeout expiration. Use Value: Ensures strict sequencing compliance without software intervention; operates reliably at 125 °C near power stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 2-input AND gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT08D,112 | Same die, identical electrical specs, but in SO14 package without 'B' suffix - pinout and thermal profile identical. | No functional difference; 'B' suffix denotes tape-and-reel packaging variant per Nexperia ordering convention. | Select 74HCT08D,112 if standard reel packaging is preferred; both share identical qualification and reliability data. |
| SN74HCT08DR | TI part with same logic function and TTL inputs, but wider VCC range (4.5–5.5 V), higher ICC (100 μA max), and different ESD ratings (HBM > 2000 V, CDM > 250 V). | Valid for same 5 V logic interfacing, but lower CDM rating may require additional board-level ESD protection in high-static environments. | Choose SN74HCT08DR only if TI's supply chain or logistics terms are prioritized; verify CDM margin against end-equipment requirements. |
Compared with 74HCT08DB,112, the 74HCT08D,112 offers identical functionality in the same package with no trade-offs, while the SN74HCT08DR introduces higher static current and reduced CDM robustness - making the Nexperia part preferable for thermally constrained or high-reliability industrial designs.
Availability
74HCT08DB,112 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, motor control enable sequencing, and power supply sequencing logic requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HCT08DB,112 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
Nexperia is a global semiconductor expert focused on essential efficiency technologies, delivering high-performance logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74HCT series targets industrial and legacy-system upgrades where TTL-level compatibility, wide temperature operation, and robust ESD performance are mandatory - designed specifically for reliable 5 V logic interfacing in harsh environments.
FAQ
Is 74HCT08DB,112 compatible with 3.3 V microcontroller I/O?
No - its input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) and recommended VCC range (4.5–5.5 V) are strictly for 5 V systems. Driving it from 3.3 V GPIO may result in marginal or non-functional VIH recognition. Use 74LVC08 or level translators for 3.3 V interfacing.
Can 74HCT08DB,112 operate at 3.3 V supply?
No - the datasheet specifies minimum VCC = 4.5 V for 74HCT08 variants. At 3.3 V, VIH/VIL thresholds become undefined, propagation delay increases unpredictably, and output drive falls below specification. Use 74HC08 or 74LVC08 for 3.3 V operation.
What is the purpose of the input clamp diodes?
The integrated clamp diodes protect inputs from overvoltage transients up to VCC + 0.5 V by shunting excess current to VCC or GND when used with external series current-limiting resistors - eliminating need for discrete protection components in sensor interface circuits.
Does 74HCT08DB,112 have a thermal pad or exposed ground?
No - the SO14 (SOT108-1) package used in 74HCT08DB,112 has no thermal pad or exposed ground terminal. Thermal dissipation relies solely on leads and PCB copper; maximum Ptot = 500 mW with linear derating above 100 °C.
74HCT08DB,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 14-SSOP (0.209", 5.30mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Logic Type:
- AND Gate
- Number of Circuits:
- 4
- Number of Inputs:
- 2
- Features:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Max):
- 2 µA
- Current - Output High, Low:
- 4mA, 4mA
- Input Logic Level - Low:
- 0.8V
- Input Logic Level - High:
- 2V
- Max Propagation Delay @ V, Max CL:
- 24ns @ 4.5V, 50pF
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SSOP
74HCT08DB,112 FAQ
1.How can I place an order for 74HCT08DB,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT08DB,112 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 74HCT08DB,112 reliable?
The price and inventory of 74HCT08DB,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT08DB,112 is usually 5 days.
3.What payment methods are accepted for 74HCT08DB,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT08DB,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT08DB,112?
74HCT08DB,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT08DB,112 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 74HCT08DB,112?
For technical support, including 74HCT08DB,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT08DB,112 requirements.
6.How does Aetrix verify that 74HCT08DB,112 is sourced from the original manufacturer or authorized distributors?
All 74HCT08DB,112 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 74HCT08DB,112 meets industry standards.
7.What is the process for return or replacement of 74HCT08DB,112?
All 74HCT08DB,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT08DB,112, 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 74HCT08DB,112 part is unused and in its original packaging.
Return procedure for 74HCT08DB,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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