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onsemi MC74VHC08DT
- Part No.:
- MC74VHC08DT
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- -
- Datasheet:
-
MC74VHC08DT.pdf
- Description:
- IC GATE AND
- Quantity:
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Inventory:2,976
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Product details
Overview
MC74VHC08DT from ON Semiconductor is a quad 2-input AND gate in TSSOP-14 package, fabricated with silicon gate CMOS technology. It operates across 2 V to 5.5 V, delivers 4.3 ns typical propagation delay at 5 V, supports 5 V ↔ 3 V system interfacing via 7 V-tolerant inputs, and is used in digital logic control, bus gating, and enable signal conditioning.
For engineers reviewing the MC74VHC08DT datasheet, pinout, applications, or equivalent options, key selection criteria include supply voltage range (2–5.5 V), input voltage tolerance (up to 7 V), propagation delay (4.3 ns typ @ 5 V), noise immunity (28% VCC), and TSSOP-14 thermal derating (−6.1 mW/°C).
Technical Context
The MC74VHC08DT implements four independent AND gates with three-stage internal circuitry including buffered outputs for high noise immunity and stable switching. Its inputs tolerate up to 7 V, enabling direct interfacing between 3 V and 5 V logic domains without level shifters.
It features power-down protection on all inputs, balanced tPLH/tPHL propagation delays, and latch-up immunity exceeding 300 mA. The device meets ESD requirements of >2000 V HBM and >200 V machine model, and is rated for operation from −40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 5.5 V - supports mixed-voltage system design and battery-powered operation down to 2 V. |
| Propagation Delay (tPD) | 4.3 ns (typ) at VCC = 5 V, CL = 15 pF - enables use in high-speed digital control paths up to ~100 MHz toggle rate. |
| Input Voltage Tolerance | −0.5 V to +7.0 V - allows safe interfacing of 5 V outputs into 3 V systems without external clamping. |
| Output Drive Capability | ±8 mA at VCC = 4.5 V - sufficient to drive standard TTL loads or multiple CMOS inputs (fan-out ≥ 10). |
| Noise Immunity | VNIH = VNIL = 28% VCC - ensures robust operation in electrically noisy industrial environments. |
| Quiescent ICC | 2 µA (max) at TA = 25°C - enables ultra-low static power in always-on logic monitoring circuits. |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded control and automotive under-hood auxiliary logic. |
Pinout & Package
TSSOP-14 (Case 948G), 4.9 mm × 4.4 mm × 1.2 mm body, 0.65 mm pitch, lead-free compatible (DT suffix denotes standard finish; DTG denotes Pb-free).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5, 9, 10, 12, 13 | Input A1/B1/A2/B2/A3/B3/A4/B4 | Dedicated AND gate inputs - each pair (e.g., pins 1 & 2) feeds one gate; no shared logic resources. |
| 3, 6, 8, 11 | Output Y1/Y2/Y3/Y4 | Buffered gate outputs - low-impedance push-pull structure ensures fast edge rates and load driving capability. |
| 7 | GND | Ground reference - must be connected directly to system ground plane to maintain noise immunity and output stability. |
| 14 | VCC | Positive supply - decoupling capacitor (0.1 µF ceramic) required within 5 mm for reliable high-speed switching. |
Key Features
| Feature | Design Value |
|---|---|
| High-speed CMOS performance | 4.3 ns tPD at 5 V matches LS-TTL speed while consuming <2 µA static current - ideal for power-sensitive high-throughput logic. |
| 7 V-tolerant inputs | Enables direct connection of 5 V signals to 3 V systems without level translators - reduces BOM count and PCB area in mixed-voltage designs. |
| Power-down input protection | Inputs remain high-impedance and non-latching when VCC = 0 V - prevents back-driving and unintended current flow during power sequencing. |
| Latch-up immunity >300 mA | Guarantees robustness against transient overvoltage events in industrial control I/O stages without external current limiting. |
| Pb-free packaging option | DTG variant available with matte tin lead finish - compliant with RoHS Directive 2011/65/EU and JEDEC J-STD-609 Class 2a. |
Applications
| Industrial PLC I/O Conditioning | Automotive Body Control Module |
|---|---|
Use Scenario: Gating sensor status signals before transmission to microcontroller interrupt lines in programmable logic controllers. IC Role / Device Role / Timing Role: Quad AND gate performing synchronized enable logic for four independent analog-to-digital converter readiness flags. Use Value: 4.3 ns propagation delay ensures sub-microsecond response alignment across channels; 2–5.5 V operation supports direct integration with 3.3 V MCU I/O rails. | Use Scenario: Combining door lock request and safety interlock signals to authorize actuator activation in vehicle door modules. IC Role / Device Role / Timing Role: Logic-level AND function verifying dual conditions before enabling 12 V solenoid drivers via external MOSFETs. Use Value: 7 V input tolerance accommodates unregulated 12 V supply monitoring signals; −40°C to +85°C rating ensures reliability in cabin temperature extremes. |
| Consumer Appliance Power Sequencing | Medical Diagnostic Equipment Interface |
Use Scenario: Enabling DC-DC converter startup only after both thermal shutdown clearance and main power OK signals are asserted. IC Role / Device Role / Timing Role: Dual-gate AND logic coordinating multi-rail power-up sequence in smart home HVAC controllers. Use Value: Low 2 µA quiescent current minimizes standby drain; TSSOP-14 footprint saves space in compact appliance control boards. | Use Scenario: Validating simultaneous trigger pulses from two independent patient monitoring sensors before initiating data acquisition. IC Role / Device Role / Timing Role: Synchronizing redundant safety-critical inputs to prevent false-positive activation of imaging subsystems. Use Value: 28% VCC noise margin suppresses EMI-induced glitches in hospital-grade EMI environments; latch-up immunity >300 mA protects against defibrillator pulse coupling. |
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 |
|---|---|---|---|
| SN74LVC08APWR | Lower VCC min (1.65 V), higher drive (24 mA), 3.5 ns tPD @ 3.3 V - optimized for 1.8/3.3 V systems. | Not suitable for 2 V operation or 7 V input tolerance; requires level-shifting for legacy 5 V interfaces. | Select when targeting modern low-voltage FPGA/CPU I/O banks with strict 3.3 V or lower supply constraints. |
| 74AHC08PW,118 | Wider VCC range (2–5.5 V), identical 7 V input tolerance, but 3.8 ns tPD @ 5 V and higher ICC (4 µA max). | Higher static current may impact battery life in always-on sensing nodes; otherwise pin-compatible drop-in replacement. | Prefer for marginal timing budgets where sub-4 ns delay is critical, accepting modest ICC increase. |
Compared with MC74VHC08DT, SN74LVC08APWR offers superior speed and drive in 3.3 V domains but lacks 2 V operation and 7 V input tolerance; 74AHC08PW,118 delivers faster propagation at identical voltage specs but doubles quiescent current - choice depends on whether timing margin or ultra-low standby power dominates the design priority.
Availability
MC74VHC08DT is available at Aetrix Electronics and suitable for industrial PLC I/O conditioning, automotive body control modules, consumer appliance power sequencing, and medical diagnostic equipment interface requiring stable component supply across extended temperature ranges and mixed-voltage logic domains.
Supply support for MC74VHC08DT 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
ON Semiconductor (now part of onsemi) is a global semiconductor supplier specializing in energy-efficient power, analog, sensor, and logic solutions for automotive, industrial, cloud, and medical markets.
The MC74VHC08DT belongs to the VHC (Very High Speed CMOS) logic family, designed specifically to bridge performance and power efficiency in mixed-signal embedded systems requiring TTL-compatible speed with CMOS-level static power.
FAQ
What is the maximum input voltage rating for the MC74VHC08DT?
The MC74VHC08DT supports DC input voltages from −0.5 V to +7.0 V, independent of VCC. This 7 V tolerance allows safe interfacing of 5 V signals into 3 V systems without external clamping diodes or level shifters, a key differentiator versus standard HC or HCT logic families. Always ensure Vin remains within this absolute maximum rating to avoid permanent damage.
Does the MC74VHC08DT require external pull-up or pull-down resistors on unused inputs?
Yes - unused inputs on the MC74VHC08DT must be tied to a valid logic level (either VCC or GND) to prevent floating states that cause increased ICC, oscillation, or excessive power dissipation. The datasheet explicitly states: "Unused inputs must always be tied to an appropriate logic voltage level." Leaving inputs unconnected violates recommended operating conditions and risks unreliable operation.
Can the MC74VHC08DT operate reliably at 2.0 V supply voltage?
Yes - the MC74VHC08DT is fully specified from 2.0 V to 5.5 V per its Recommended Operating Conditions table. At 2.0 V, it maintains guaranteed VOH ≥ 1.9 V and VOL ≤ 0.1 V with 50 µA load, and tPLH/tPHL ≤ 14.0 ns (CL = 50 pF). This makes it suitable for battery-powered devices with brown-out detection or wide-input DC-DC converters.
What is the thermal derating coefficient for the MC74VHC08DT in TSSOP-14 package?
The MC74VHC08DT in TSSOP-14 (Case 948G) has a thermal derating coefficient of −6.1 mW/°C above 65°C ambient, as specified in the Maximum Ratings table. Its maximum power dissipation is 450 mW at TA ≤ 65°C. Designers must apply this linear derating when operating above 65°C to avoid exceeding junction temperature limits and ensure long-term reliability.
Is the MC74VHC08DT pin-compatible with older 74HC08 or 74LS08 devices?
The MC74VHC08DT is functionally and pin-compatible with standard 74-series quad 2-input AND gates in 14-pin packages, including 74HC08 and 74LS08. Pin assignments (1=A1, 2=B1, 3=Y1, etc.) match industry-standard logic layout. However, due to its higher speed and different input thresholds, verify timing margins and fan-out loading in legacy designs before direct substitution.
MC74VHC08DT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Number of Circuits:
- -
- Number of Inputs:
- -
- Features:
- -
- Voltage - Supply:
- -
- Current - Quiescent (Max):
- -
- Current - Output High, Low:
- -
- Input Logic Level - Low:
- -
- Input Logic Level - High:
- -
- Max Propagation Delay @ V, Max CL:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MC74VHC08DT FAQ
1.How can I place an order for MC74VHC08DT through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74VHC08DT 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 MC74VHC08DT reliable?
The price and inventory of MC74VHC08DT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74VHC08DT is usually 5 days.
3.What payment methods are accepted for MC74VHC08DT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74VHC08DT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74VHC08DT?
MC74VHC08DT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74VHC08DT 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 MC74VHC08DT?
For technical support, including MC74VHC08DT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74VHC08DT requirements.
6.How does Aetrix verify that MC74VHC08DT is sourced from the original manufacturer or authorized distributors?
All MC74VHC08DT 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 MC74VHC08DT meets industry standards.
7.What is the process for return or replacement of MC74VHC08DT?
All MC74VHC08DT units undergo pre-shipment inspection (PSI). If there is an issue with MC74VHC08DT, 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 MC74VHC08DT part is unused and in its original packaging.
Return procedure for MC74VHC08DT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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