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Diodes Incorporated 74AHCT08T14-13
- Part No.:
- 74AHCT08T14-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Gates and Inverters
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74AHCT08T14-13.pdf
- Description:
- IC GATE AND 4CH 2-INP 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,979
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Product details
Overview
74AHCT08T14-13 from Diodes Incorporated is a quadruple 2-input AND gate IC in TSSOP-14 package, operating at 4.5V–5.5V supply, delivering 3.8V VOH at -8mA and 0.44V VOL at 8mA, with 3.4ns typical propagation delay (CL = 15pF), used for combinatorial logic in PC motherboard control paths and peripheral interface signal conditioning.
For engineers reviewing the 74AHCT08T14-13 datasheet, 74AHCT08T14-13 pinout, 74AHCT08T14-13 application, or 74AHCT08T14-13 equivalent, key selection criteria include TTL-compatible input thresholds (VIH = 2.0V, VIL = 0.8V), Schmitt-trigger input noise immunity, ±25mA output drive capability, and -40°C to +125°C industrial temperature operation.
Technical Context
The 74AHCT08T14-13 implements four independent non-inverting AND gates with push-pull CMOS outputs, fully compatible with TTL input voltage levels while consuming only 20μA ICC (typ) at static conditions. Its inputs feature Schmitt-trigger action, providing hysteresis of ~0.3V to suppress noise on slow-rising signals.
Propagation delay is specified down to 3.4ns (typ) at VCC = 4.5V and CL = 15pF, with guaranteed max 9.0ns over full temperature range (-40°C to +125°C). Output drive strength is characterized at both 50μA and 8mA load conditions, supporting direct interfacing to legacy TTL loads and modern low-capacitance digital nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Four independent 2-input AND gates (Y = A • B) |
| Supply Voltage Range | 4.5V to 5.5V - ensures compatibility with 5V TTL and mixed-voltage systems |
| Input Thresholds | VIH = 2.0V, VIL = 0.8V - matches standard TTL logic levels for seamless interfacing |
| Output Drive | VOH ≥ 3.80V @ -8mA, VOL ≤ 0.44V @ 8mA - drives 5V TTL loads directly without level shifters |
| Propagation Delay | tPD = 3.4ns (typ) @ CL = 15pF, VCC = 4.5V - supports >100MHz toggle rates in short-path logic |
| ESD Protection | HBM: 2kV, CDM: 1kV, MM: 200V - exceeds JEDEC JESD22 standards for board-level robustness |
| Operating Temperature | -40°C to +125°C - qualified for industrial and extended-temperature embedded control |
Pinout & Package
TSSOP-14 (Thin Shrink Small Outline Package, 4.9mm × 4.4mm × 1.2mm body, 0.65mm pitch) with exposed pad not electrically connected; RoHS-compliant, halogen-free, lead-free construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 9, 12 | Input A (Gate 1–4) | Active-high logic input; Schmitt-triggered for noise margin on slow edges |
| 2, 5, 10, 13 | Input B (Gate 1–4) | Second active-high logic input per gate; TTL-level compatible |
| 3, 6, 8, 11 | Output Y (Gate 1–4) | Push-pull CMOS output; sinks/source up to ±25mA, rail-to-rail swing |
| 7 | GND | Ground reference for all logic and power domains; must be low-impedance |
| 14 | VCC | Positive supply input; bypass capacitor (0.1μF) required within 5mm of pin |
Key Features
| Feature | Design Value |
|---|---|
| TTL-Compatible Inputs | VIH/VIL thresholds match legacy 5V TTL, enabling drop-in replacement without redesign |
| Schmitt-Trigger Inputs | ~0.3V hysteresis per input suppresses noise-induced glitches on noisy or slow-rising signals |
| Low-Power CMOS Core | ICC = 20μA (typ) at static operation - reduces standby power in always-on control logic |
| Robust ESD Rating | HBM 2kV / CDM 1kV - meets IEC 61000-4-2 Level 3 for system-level ESD immunity |
| Industrial Temp Range | Specified from -40°C to +125°C junction - supports under-hood, factory-floor, and high-density PCB applications |
Applications
| PC Motherboard Power Sequencing | Hard Disk Drive Interface Control |
|---|---|
Use Scenario: Enabling ATX power-good signals and reset coordination between CPU, chipset, and VRMs. IC Role / Device Role / Timing Role: Combinatorial enable gate synchronizing multiple power-rail status signals before releasing processor reset. Use Value: Ensures deterministic power-up order via noise-immune AND logic, eliminating race conditions during cold start. |
Use Scenario: Conditioning host-initiated command strobes and drive-ready handshaking in SATA/IDE controller logic. IC Role / Device Role / Timing Role: Signal gating element validating both host request and drive readiness before data transfer initiation. Use Value: Prevents spurious writes by requiring concurrent valid control signals, improving firmware reliability. |
| Set-Top Box IR Remote Decoder Logic | Industrial PLC Input Signal Conditioning |
Use Scenario: Debouncing and synchronizing decoded IR command bits before microcontroller interrupt assertion. IC Role / Device Role / Timing Role: Glitch-filtering AND gate combining carrier-detect and bit-valid pulses from IR demodulator. Use Value: Eliminates false triggers caused by ambient IR noise using Schmitt-trigger input hysteresis. |
Use Scenario: Validating dual-redundant sensor inputs (e.g., limit switches) before actuator enable in safety-critical motion control. IC Role / Device Role / Timing Role: Safety interlock gate requiring simultaneous assertion of two independent fault-monitored inputs. Use Value: Provides hardware-level AND validation prior to software processing, reducing single-point failure risk. |
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 |
|---|---|---|---|
| SN74AHCT08PW | TSSOP-14, identical logic and DC specs; TI version has slightly tighter tPD min (0.4ns vs 0.5ns) and higher ICC max (45μA vs 40μA) | Same footprint and function; TI's characterization includes automotive-grade screening (AEC-Q100 Grade 3) | Select for automotive qualification or if sourcing TI-authorized channels is mandatory |
| 74AHCT08S14-13 | SO-14 package (5.0mm × 10.2mm); same electrical specs but 3× larger footprint and 2× higher thermal resistance (θJA = 120°C/W vs 180°C/W) | Preferred for through-hole prototyping or legacy PCBs with SOIC footprints; lower assembly cost in low-volume SMT | Select when board space allows SOIC or reworkability is prioritized over density |
Compared with SN74AHCT08PW and 74AHCT08S14-13, the 74AHCT08T14-13 offers optimal density and thermal performance for high-integration consumer and industrial PCBs, while maintaining full functional and timing equivalence across all three variants.
Availability
74AHCT08T14-13 is available at Aetrix Electronics and suitable for PC motherboard power sequencing, hard disk drive interface control, and industrial PLC input conditioning requiring stable component supply and long-term lifecycle support.
Supply support for 74AHCT08T14-13 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and Malaysia.
The 74AHCT08 belongs to Diodes' advanced logic family targeting industrial, computing, and consumer applications where TTL compatibility, low power, and robust ESD performance are critical.
FAQ
Is the 74AHCT08T14-13 pin-compatible with standard 74-series AND gates?
Yes - it follows the industry-standard 14-pin DIP/SO/TSSOP pinout for quad 2-input AND gates (e.g., 74LS08, 74HC08). Pin 1 is 1A, pin 2 is 1B, pin 3 is 1Y, continuing sequentially; GND is pin 7 and VCC is pin 14. No layout changes are needed when upgrading from compatible families.
Can unused inputs be left floating?
No - unused inputs must be tied to VCC or GND. Floating inputs cause increased ICC, erratic output behavior, and potential latch-up due to internal parasitic structures. The datasheet explicitly requires termination to ensure stable operation and meet specified current limits.
Does this device support mixed-voltage operation (e.g., 3.3V inputs driving a 5V supply)?
No - the 74AHCT08T14-13 is designed for 4.5V–5.5V VCC only. While its TTL-compatible inputs accept 3.3V as VIH (≥2.0V), the output swing remains 0V–VCC (i.e., 0–5V), so interfacing to 3.3V-only receivers requires external level translation or series resistors to avoid overvoltage damage.
What is the maximum capacitive load this device can drive reliably?
The datasheet specifies switching characteristics up to CL = 50pF. At that load, tPD increases to 10.0ns (max) at VCC = 4.5V. For reliable operation beyond 50pF, add a series resistor (e.g., 22Ω–47Ω) near the output to damp ringing and reduce slew rate, especially on long traces or unterminated lines.
74AHCT08T14-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- 74AHCT
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- AND Gate
- Number of Circuits:
- 4
- Number of Inputs:
- 2
- Features:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Max):
- 20 µA
- Current - Output High, Low:
- 8mA, 8mA
- Input Logic Level - Low:
- 0.8V
- Input Logic Level - High:
- 2V
- Max Propagation Delay @ V, Max CL:
- 10ns @ 5V, 50pF
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
74AHCT08T14-13 FAQ
1.How can I place an order for 74AHCT08T14-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT08T14-13 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 74AHCT08T14-13 reliable?
The price and inventory of 74AHCT08T14-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT08T14-13 is usually 5 days.
3.What payment methods are accepted for 74AHCT08T14-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT08T14-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHCT08T14-13?
74AHCT08T14-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHCT08T14-13 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 74AHCT08T14-13?
For technical support, including 74AHCT08T14-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT08T14-13 requirements.
6.How does Aetrix verify that 74AHCT08T14-13 is sourced from the original manufacturer or authorized distributors?
All 74AHCT08T14-13 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 74AHCT08T14-13 meets industry standards.
7.What is the process for return or replacement of 74AHCT08T14-13?
All 74AHCT08T14-13 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT08T14-13, 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 74AHCT08T14-13 part is unused and in its original packaging.
Return procedure for 74AHCT08T14-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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