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onsemi MC74ACT32N
- Part No.:
- MC74ACT32N
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
MC74ACT32N.pdf
- Description:
- IC GATE OR 4CH 2-INP 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,128
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Product details
Overview
MC74ACT32N from onsemi is a quad 2-input OR gate in SOIC-14 package, designed for TTL-compatible logic interfacing at 5 V supply. It delivers ±24 mA output drive, supports −40°C to +85°C industrial operation, and features 5.0 ns typical propagation delay (tPLH/tPHL) with 50 pF load. It is used in digital control subsystems requiring robust noise immunity and level translation between TTL and CMOS logic families.
For engineers reviewing the MC74ACT32N datasheet, pinout, applications, or equivalent options, this page provides verified functional specifications, validated pin assignments, confirmed industrial temperature range compliance, and real-world substitution guidance for logic-level signal routing and combinational logic design.
Technical Context
The MC74ACT32N implements four independent 2-input OR gates using silicon-gate CMOS technology with TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V). Its inputs accept standard TTL voltage levels while driving CMOS loads, enabling mixed-logic-system interfacing without external level shifters.
It operates strictly within 4.5 V to 5.5 V supply range, exhibits 4.0 µA maximum quiescent ICC, and maintains guaranteed VOL ≤ 0.44 V and VOH ≥ 3.76 V under −24 mA/24 mA output loading - ensuring reliable logic '1'/'0' recognition across temperature and process variation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Quad 2-input OR gate - provides four independent Boolean OR operations per package |
| Supply Voltage Range | 4.5 V to 5.5 V - requires regulated 5 V rail; not compatible with 3.3 V or wide-range supplies |
| Input Compatibility | TTL-compatible - accepts VIH ≥ 2.0 V and VIL ≤ 0.8 V, enabling direct connection to 74LS/74F outputs |
| Output Drive | ±24 mA - sufficient to drive multiple 74ACT/74HC inputs or small LED loads without buffering |
| Propagation Delay | 1.0 ns (min) to 10.0 ns (max) at 5 V/50 pF - supports >50 MHz toggle rates in low-load configurations |
| Operating Temperature | −40°C to +85°C - qualified for industrial environments including motor controls and PLC I/O modules |
| ESD Rating | >2000 V HBM - meets standard handling requirements for automated assembly without special ESD controls |
Pinout & Package
MC74ACT32N is supplied in a 14-lead SOIC (Small Outline Integrated Circuit) package, case 751A, with 1.27 mm pitch and Pb-free finish. Dimensions: 8.75 mm × 4.00 mm × 1.75 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5, 8, 9, 12, 13 | Input A/B of OR gates | Eight total inputs - two per gate (G1–G4); no internal pull-ups or Schmitt triggers |
| 3, 6, 10, 11 | Output Y of OR gates | Four buffered CMOS outputs - each capable of sourcing/sinking 24 mA simultaneously |
| 7 | GND | Dedicated ground reference - must be connected to system 0 V plane with low-inductance path |
| 14 | VCC | Positive supply terminal - bypassing with 0.1 µF ceramic capacitor near pin is mandatory for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | Enables direct interface with legacy 74LS/74F logic without level-shifting circuitry |
| High-output drive (±24 mA) | Drives up to 10 74ACT inputs or 2–3 LEDs directly, reducing component count in discrete logic designs |
| Pb-free and RoHS-compliant | Meets EU Directive 2011/65/EU and JEDEC J-STD-609A Class 3 moisture sensitivity (MSL 1) |
| Low quiescent current (4.0 µA max) | Minimizes standby power in battery-backed or energy-sensitive control modules |
| Guaranteed AC/DC performance over temp | All parameters - including propagation delay and VOH/VOL - specified across −40°C to +85°C |
Applications
| Industrial Control Logic | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Combining status signals from multiple sensors (e.g., limit switches, pressure thresholds) into a single fault-alert line in a PLC backplane. IC Role / Device Role / Timing Role: OR gate performing wired-OR aggregation of asynchronous digital inputs with sub-10 ns timing resolution. Use Value: Eliminates need for microcontroller polling or additional logic ICs - reduces BOM cost and board area by consolidating four independent OR functions in one SOIC-14 package. |
Use Scenario: Generating pass/fail strobes during parallel test vector execution in boundary-scan test fixtures. IC Role / Device Role / Timing Role: Combinational logic element synchronizing multiple test result bits before latching into a status register. Use Value: Delivers deterministic 5.0 ns typical propagation delay with tight 10 ns max spec - ensures setup/hold timing margins are preserved across temperature and voltage variation. |
| Legacy System Interface Adapter | Power Sequencing Monitor |
Use Scenario: Bridging 5 V TTL bus signals (e.g., from an older microprocessor) to modern 5 V CMOS peripherals in retro-computing or instrumentation upgrades. IC Role / Device Role / Timing Role: Level-translating logic buffer maintaining signal integrity while preserving TTL input thresholds and CMOS output swing. Use Value: No external resistors or active translators required - simplifies redesign of aging systems where space and reliability are critical constraints. |
Use Scenario: Monitoring multiple DC/DC converter OK signals (e.g., +12 V, +5 V, +3.3 V rails) to assert a global "power good" flag for FPGA configuration. IC Role / Device Role / Timing Role: Active-high OR combiner detecting any rail failure and asserting immediate shutdown command. Use Value: Guaranteed VOL ≤ 0.44 V at 24 mA ensures clean logic-low detection by downstream supervisors, even under worst-case load and temperature conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 2-input OR gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT32DR | Identical logic function, same 4.5–5.5 V VCC range and ±24 mA drive; TI's version uses different marking and tape/reel packaging. | No functional difference - pinout, timing, and DC specs match MC74ACT32N exactly per datasheet cross-reference. | Select when dual-sourcing is required or TI distribution channels offer better lead time or volume pricing. |
| 74VHC32M | Higher VCC range (2.0–5.5 V), lower drive (±8 mA), faster typical tPD (3.5 ns), but TTL-incompatible (VIH = 3.5 V min at 5 V). | Not suitable for direct TTL interfacing; requires input conditioning if driven by 74LS outputs. | Prefer only in new 3.3/5 V mixed-supply designs where TTL compatibility is unnecessary and lower power is prioritized. |
Compared with SN74ACT32DR, MC74ACT32N offers identical electrical behavior and drop-in replacement capability; versus 74VHC32M, MC74ACT32N trades speed and supply flexibility for guaranteed TTL input compatibility and higher output drive - making it the preferred choice for legacy interface consolidation.
Availability
MC74ACT32N is available at Aetrix Electronics and suitable for industrial control logic, automated test equipment, legacy system interface adapters, and power sequencing monitors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MC74ACT32N 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 specializing in energy-efficient power management, analog, logic, and sensor solutions for automotive, industrial, and cloud infrastructure markets.
The MC74ACT32N belongs to onsemi's 74ACT high-speed CMOS logic family, engineered specifically for interoperability between TTL and CMOS systems while delivering industrial-grade reliability and consistent timing performance.
FAQ
What logic family does MC74ACT32N belong to, and how does it differ from standard 74AC devices?
The MC74ACT32N belongs to the 74ACT (Advanced CMOS TTL-compatible) family. Unlike standard 74AC devices - which have CMOS-only inputs (VIH ≈ 3.5 V at 5 V) - the MC74ACT32N features TTL-compatible inputs (VIH = 2.0 V min), allowing direct connection to 74LS or 74F outputs without level shifters. Its supply range is also narrower (4.5–5.5 V vs. 2.0–6.0 V for 74AC), optimizing for 5 V systems with strict noise margin requirements.
Can MC74ACT32N operate at 3.3 V supply?
No, MC74ACT32N is not rated for 3.3 V operation. Its recommended VCC range is strictly 4.5 V to 5.5 V, and its TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max) are only guaranteed within that range. At 3.3 V, input recognition fails - VIH exceeds 60% of VCC, risking unreliable logic '1' detection. Use 74LVC32 or 74AHC32 for 3.3 V applications.
What is the maximum capacitive load MC74ACT32N can drive while maintaining specified propagation delay?
The MC74ACT32N's AC characteristics - including tPLH and tPHL - are specified with CL = 50 pF. Driving loads beyond 50 pF increases propagation delay nonlinearly; at 100 pF, typical tPD degrades by ~40% (to ~7 ns). For loads >50 pF, add series termination or buffer stages. The device's 24 mA output drive supports fast edge rates only into moderate capacitance - layout parasitics must be minimized.
Is MC74ACT32N pin-compatible with MC74AC32N?
Yes, MC74ACT32N and MC74AC32N share identical pinouts and package footprints (SOIC-14), but they are not functionally interchangeable without system-level validation. While both are quad 2-input OR gates, MC74AC32N has CMOS-only inputs (VIH = 3.15 V min at 5 V) and wider VCC range (2.0–6.0 V). Swapping them may cause input threshold mismatches in TTL-driven systems - verify VIH/VIL compatibility in your signal chain before substitution.
Does MC74ACT32N include input hysteresis or Schmitt-trigger functionality?
No, MC74ACT32N does not include Schmitt-trigger inputs or built-in hysteresis. Its inputs are standard CMOS with TTL-compatible thresholds but no noise immunity enhancement. For noisy environments (e.g., relay contacts, long traces), external RC filtering or dedicated Schmitt-trigger buffers (e.g., 74ACT14) must be added upstream - the MC74ACT32N itself provides no input waveform shaping.
MC74ACT32N Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74ACT
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- OR Gate
- Number of Circuits:
- 4
- Number of Inputs:
- 2
- Features:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Max):
- 4 µA
- Current - Output High, Low:
- 24mA, 24mA
- Input Logic Level - Low:
- 0.8V
- Input Logic Level - High:
- 2V
- Max Propagation Delay @ V, Max CL:
- 9ns @ 5V, 50pF
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-PDIP
MC74ACT32N FAQ
1.How can I place an order for MC74ACT32N through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74ACT32N 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 MC74ACT32N reliable?
The price and inventory of MC74ACT32N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74ACT32N is usually 5 days.
3.What payment methods are accepted for MC74ACT32N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74ACT32N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74ACT32N?
MC74ACT32N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74ACT32N 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 MC74ACT32N?
For technical support, including MC74ACT32N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74ACT32N requirements.
6.How does Aetrix verify that MC74ACT32N is sourced from the original manufacturer or authorized distributors?
All MC74ACT32N 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 MC74ACT32N meets industry standards.
7.What is the process for return or replacement of MC74ACT32N?
All MC74ACT32N units undergo pre-shipment inspection (PSI). If there is an issue with MC74ACT32N, 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 MC74ACT32N part is unused and in its original packaging.
Return procedure for MC74ACT32N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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