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onsemi MC74AC14M
- Part No.:
- MC74AC14M
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- -
- Datasheet:
-
MC74AC14M.pdf
- Description:
- IC SCHMITT TRIG HEX INV 14SOEIAJ
- Quantity:
- Payment:
- Shipping:
Inventory:5,913
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Product details
Overview
MC74AC14M from onsemi is a hex Schmitt-trigger inverter IC designed for signal conditioning and noise-immune digital input interfacing. It features six independent inverters with hysteresis (typ. 1.0 V), CMOS-compatible inputs/outputs, ±24 mA output drive, and operates from 2.0 V to 6.0 V supply. Used in clock shaping, debouncing mechanical switches, and waveform regeneration in industrial control systems.
For engineers reviewing the MC74AC14M datasheet, pinout, applications, or equivalent options, key selection criteria include hysteresis voltage, output drive strength at 3.3 V/5 V, propagation delay (≤11 ns @ 5 V), input threshold stability over temperature, and EIAJ-14 package compatibility with legacy board layouts.
Technical Context
The MC74AC14M implements six independent Schmitt-trigger inverters using advanced AC CMOS process technology. Each channel provides input hysteresis determined by internal transistor ratios - ensuring stable switching thresholds insensitive to supply voltage (2.0–6.0 V) and temperature (−40°C to +85°C).
It delivers rail-to-rail CMOS output levels with guaranteed VOH ≥ 4.4 V and VOL ≤ 0.44 V at VCC = 4.5 V and IOL/IOH = ±24 mA, supporting direct interface with TTL and other CMOS logic families without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Hex Schmitt-trigger inverter - enables clean edge regeneration from slow/noisy signals |
| Hysteresis Voltage (VH) | Typ. 1.0 V - ensures robust noise immunity and prevents multiple transitions on slow edges |
| Supply Voltage Range | 2.0 V to 6.0 V - supports mixed-voltage system integration including 3.3 V and 5 V domains |
| Output Drive (IOH/IOL) | ±24 mA per output - drives standard CMOS/TTL loads and small capacitive buses directly |
| Propagation Delay (tPLH/tPHL) | Max 11.0 ns @ VCC = 5.0 V, CL = 50 pF - suitable for sub-50 MHz signal conditioning |
| Input Thresholds (Vt+/Vt−) | Vt+ = 3.2 V, Vt− = 0.9 V @ VCC = 4.5 V - defines precise switching windows for reliable edge detection |
| Operating Temperature | −40°C to +85°C - qualified for industrial ambient environments without derating |
Pinout & Package
EIAJ-14 (Case 965) surface-mount package - 14-pin plastic SOP variant with 1.27 mm pitch, JEDEC-standard footprint, and 8.65 mm × 3.9 mm body size. Compatible with reflow soldering and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 9, 11, 13 | Input (A1–A6) | CMOS/Schmitt-trigger input pins - accept slow-rising signals and reject noise below hysteresis window |
| 2, 4, 6, 10, 12, 14 | Output (Y1–Y6) | Inverted outputs with full rail-swing CMOS levels and ±24 mA drive capability |
| 7 | GND | Ground reference for all inputs, outputs, and internal circuitry - must be low-impedance return path |
| 14 | VCC | Positive supply pin - decoupling capacitor (0.1 µF) required adjacent to pin for stable operation |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | Guaranteed 1.0 V typical hysteresis - eliminates contact bounce and EMI-induced glitches in switch/sensor interfaces |
| High-output drive | ±24 mA per inverter - eliminates need for external buffer stages when driving LEDs, relays, or multi-load buses |
| Wide supply range | 2.0 V to 6.0 V operation - allows single device to serve both 3.3 V microcontroller I/O and 5 V legacy peripherals |
| Low quiescent current | Max 40 µA ICC @ VCC = 5.5 V - enables use in battery-backed or low-power monitoring circuits |
| Industrial temperature grade | −40°C to +85°C operation - validated for continuous use in motor drives, PLC I/O modules, and HVAC controllers |
Applications
| Switch Debouncing | Waveform Shaping |
|---|---|
Use Scenario: Mechanical pushbutton or rotary encoder signals exhibit contact bounce lasting 1–10 ms, causing false interrupts in microcontrollers. IC Role / Device Role / Timing Role: MC74AC14M acts as a hardware-level signal conditioner - its Schmitt-trigger inputs convert noisy transitions into clean, monotonic edges. Use Value: Eliminates need for software debouncing delays or external RC filters, reducing firmware complexity and interrupt latency. | Use Scenario: Sine-wave oscillator output or analog sensor signal requires conversion to square wave for digital timing or counting. IC Role / Device Role / Timing Role: MC74AC14M functions as a zero-crossing detector and edge regenerator - transforming slow analog edges into fast, jitter-free digital clocks. Use Value: Achieves <11 ns propagation delay variation across temperature, enabling reliable 50 MHz clock distribution without added jitter. |
| Level Translation | Noise-Immune Sensing |
Use Scenario: Interfacing a 3.3 V FPGA I/O bank to a 5 V industrial sensor with TTL-compatible output swing. IC Role / Device Role / Timing Role: MC74AC14M serves as unidirectional level shifter - accepting 3.3 V logic high (≥2.0 V) and delivering full 5 V CMOS output swing. Use Value: No external biasing or resistors needed; maintains signal integrity while meeting VIH/VIL margins of both sides. | Use Scenario: Proximity sensor output in factory automation environment suffers from EMI coupling and ground noise up to ±1 V peak. IC Role / Device Role / Timing Role: MC74AC14M operates as noise-hardened input front-end - its 1.0 V hysteresis rejects transients smaller than threshold window. Use Value: Prevents spurious triggering in safety-critical motion detection, reducing false alarms and maintenance overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex Schmitt-trigger inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LV14APWR | Lower VCC range (1.65–5.5 V); max IOL = 12 mA; hysteresis ~0.5 V | Optimized for 1.8 V/3.3 V systems only; insufficient drive for 5 V bus loading | Select when operating exclusively below 3.6 V and lower power is prioritized over drive strength |
| 74HC14D,653 | Same 2–6 V range but higher ICC (max 160 µA); slower tPD (max 21 ns @ 4.5 V) | Higher static power and longer delay limit use in high-speed or battery-constrained designs | Choose for cost-sensitive, non-time-critical applications where legacy HC family compatibility is required |
Compared with SN74LV14APWR and 74HC14D,653, the MC74AC14M uniquely balances 5 V tolerance, ±24 mA drive, and sub-11 ns delay - making it optimal for industrial signal conditioning where robustness and speed coexist.
Availability
MC74AC14M is available at Aetrix Electronics and suitable for industrial control panels, programmable logic controller (PLC) I/O modules, and factory automation sensor interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MC74AC14M 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.
The MC74AC14M belongs to the AC logic family - engineered for high-speed, low-noise digital signal conditioning in harsh industrial environments with wide supply and temperature margins.
FAQ
What is the maximum supply voltage rating for the MC74AC14M?
The MC74AC14M has an absolute maximum DC supply voltage (VCC) rating of +7.0 V, but recommended operation is limited to 2.0 V to 6.0 V. Operating continuously above 6.0 V risks permanent damage, while operation below 2.0 V may cause unreliable switching due to insufficient input threshold margin. Always refer to the Recommended Operating Conditions table in the official datasheet for design validation.
Does the MC74AC14M support 3.3 V logic systems?
Yes, the MC74AC14M fully supports 3.3 V operation: its input thresholds (Vt+ ≈ 2.2 V, Vt− ≈ 0.5 V at VCC = 3.0 V) and output levels (VOH ≥ 2.9 V, VOL ≤ 0.1 V) meet standard 3.3 V CMOS requirements. It also guarantees ±24 mA drive at 3.3 V, enabling direct interface with FPGAs, microcontrollers, and peripheral ICs without level shifters.
What is the hysteresis voltage of the MC74AC14M and how does it vary with supply?
The MC74AC14M exhibits typical hysteresis of 1.0 V, with minimum/maximum values of 0.4 V and 1.6 V respectively across VCC = 4.5 V to 5.5 V. This hysteresis is internally generated via transistor ratio design and remains stable over temperature and supply voltage - unlike resistor-based external hysteresis, which drifts with VCC and thermal coefficient.
Can the MC74AC14M replace the MC74ACT14M in a design?
Yes, the MC74AC14M can replace the MC74ACT14M in most applications, but with one key difference: the ACT version has TTL-compatible inputs (VIH = 2.0 V min), while the AC version requires CMOS-level inputs (VIH ≥ 70% VCC). At 5 V, both function identically; at 3.3 V, the AC version needs ≥2.3 V input high, whereas ACT accepts ≥2.0 V - verify source logic family compatibility before substitution.
Is the EIAJ-14 package (Case 965) of the MC74AC14M compatible with standard SOIC-14 footprints?
No, the EIAJ-14 package used by the MC74AC14M has a narrower body width (3.9 mm vs. 3.9–4.0 mm) and identical 1.27 mm pitch, but differs in lead form and mold compound profile from JEDEC SOIC-14. While pad layout may align mechanically, reflow profiles and solder joint reliability require validation. Use MC74AC14D (SOIC-14, Case 751A) for drop-in SOIC compatibility.
MC74AC14M 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:
- -
MC74AC14M FAQ
1.How can I place an order for MC74AC14M through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74AC14M 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 MC74AC14M reliable?
The price and inventory of MC74AC14M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74AC14M is usually 5 days.
3.What payment methods are accepted for MC74AC14M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74AC14M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74AC14M?
MC74AC14M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74AC14M 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 MC74AC14M?
For technical support, including MC74AC14M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74AC14M requirements.
6.How does Aetrix verify that MC74AC14M is sourced from the original manufacturer or authorized distributors?
All MC74AC14M 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 MC74AC14M meets industry standards.
7.What is the process for return or replacement of MC74AC14M?
All MC74AC14M units undergo pre-shipment inspection (PSI). If there is an issue with MC74AC14M, 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 MC74AC14M part is unused and in its original packaging.
Return procedure for MC74AC14M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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