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onsemi MC74ACT32ML1
- Part No.:
- MC74ACT32ML1
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- -
- Datasheet:
-
MC74ACT32ML1.pdf
- Description:
- IC GATE OR
- Quantity:
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Inventory:24,529
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Product details
Overview
MC74ACT32ML1 from onsemi is a quad 2-input OR gate IC with TTL-compatible inputs, operating at 4.5–5.5 V supply, delivering ±24 mA output drive, and achieving 10 ns max propagation delay at 5 V/50 pF. It is used in digital logic interfacing, bus arbitration, and level-shifting circuits in industrial control systems.
For engineers reviewing the MC74ACT32ML1 datasheet, pinout, applications, or equivalent options, key selection criteria include its 5 V operation, TTL input compatibility, guaranteed 24 mA drive strength, and EIAJ-14 (CASE 965) package footprint.
Technical Context
The MC74ACT32ML1 implements four independent 2-input OR logic functions using advanced bipolar CMOS (ACT) process technology. It features TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5.5 V), enabling direct interface with legacy TTL families without level translation.
Its AC performance is characterized at CL = 50 pF and VCC = 5.0 V ±0.5 V, with tPLH/tPHL ≤ 10.0 ns over –40°C to +85°C. Input rise/fall time sensitivity is specified at 8.0 ns/V for ′ACT devices, supporting robust timing margins in noise-prone environments.
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 - ensures stable operation across standard 5 V rail tolerances |
| Output Drive | ±24 mA - supports direct driving of multiple TTL loads or moderate-capacitance PCB traces |
| Propagation Delay | ≤10.0 ns at 5 V/50 pF - enables reliable operation in 50 MHz+ combinatorial logic paths |
| Input Compatibility | TTL-compatible - VIH ≥ 2.0 V, VIL ≤ 0.8 V - allows seamless integration with 74LS, 74F, and other TTL outputs |
| Operating Temperature | –40°C to +85°C - qualified for industrial ambient environments without derating |
| Input Capacitance | 4.5 pF - minimizes loading on upstream drivers and preserves signal edge integrity |
Pinout & Package
EIAJ-14 (CASE 965) surface-mount package - 14-pin plastic leaded chip carrier (PLCC) variant with gull-wing leads, 0.65 mm pitch, and JEDEC-standard footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5, 8, 9, 11, 12 | Input A/B per OR gate | Dual inputs for each of four OR gates - no internal pull-up/down; requires external termination if floating |
| 3, 6, 10, 13 | Output Y per OR gate | Active-high CMOS outputs - capable of sourcing/sinking 24 mA while maintaining VOH ≥ 4.4 V / VOL ≤ 0.44 V |
| 7 | GND | Ground reference for all I/O and internal circuitry - must be low-impedance connection to system ground plane |
| 14 | VCC | Positive supply terminal - bypass capacitor (0.1 µF ceramic) required within 10 mm for stable high-speed operation |
Key Features
| Feature | Design Value |
|---|---|
| TTL-Compatible Inputs | Enables direct connection to 74LS/74F outputs without level shifters or resistors, reducing BOM count and layout area |
| High Output Drive | ±24 mA per output supports fan-out of ≥10 LS-TTL loads or direct interface to small-signal MOSFET gates |
| Low Propagation Delay | 10 ns max at 5 V/50 pF allows use in critical timing paths where 74AC variants exceed delay budgets |
| Industrial Temp Range | –40°C to +85°C operation eliminates need for thermal derating in factory automation or outdoor equipment |
| Low Input Capacitance | 4.5 pF input capacitance minimizes capacitive loading on clock or data lines, preserving signal integrity up to 100 MHz |
Applications
| Industrial PLC I/O Expansion | Legacy System Bus Arbitration |
|---|---|
Use Scenario: Adding discrete OR logic to merge multiple interrupt request lines into a single CPU IRQ input in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Combinatorial OR gate aggregating up to four asynchronous event signals with sub-10 ns latency. Use Value: Eliminates need for microcontroller-based polling or FPGA logic resources, reducing firmware complexity and power consumption. | Use Scenario: Resolving bus grant conflicts between multiple DMA controllers sharing a common data bus in retro-computing or test instrumentation systems. IC Role / Device Role / Timing Role: Priority encoder front-end performing wired-OR resolution of GRANT# signals before feeding to central arbiter. Use Value: Provides deterministic, zero-software-latency arbitration with guaranteed setup/hold timing relative to clock edges. |
| 5 V Sensor Interface Logic | Power Sequencing Control |
Use Scenario: Combining fault flags from multiple analog sensor conditioners (e.g., temperature, pressure, current) into a unified "SYSTEM FAULT" indicator. IC Role / Device Role / Timing Role: Level-translating OR gate accepting TTL-level alerts and driving a 5 V LED driver or microcontroller GPIO. Use Value: Maintains noise immunity via TTL-compatible inputs while delivering sufficient current to drive indicator LEDs directly. | Use Scenario: Enabling power rails only after all upstream supplies (e.g., 12 V, 5 V, 3.3 V) have stabilized, using individual PGOOD signals as OR inputs. IC Role / Device Role / Timing Role: Active-high enable generator that asserts EN when any PGOOD line goes high, ensuring safe sequencing order. Use Value: Prevents latch-up or brownout conditions by guaranteeing minimum hold time on enable signals before downstream regulators activate. |
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 | SOIC-14 (D suffix), identical AC/DC specs, same 4.5–5.5 V range and ±24 mA drive | No package change required for board redesign; same pinout but different land pattern and thermal profile | Select when SOIC-14 is preferred for reflow compatibility or existing stencil design |
| 74VHC32M | Higher VCC range (2–5.5 V), lower drive (±8 mA), faster max speed (7.5 ns), CMOS-only inputs | Not TTL-compatible - requires level-shifting for legacy TTL interfaces; unsuitable for direct 74LS replacement | Select only for new 3.3 V–5 V mixed-voltage designs where input compatibility is not required |
Compared with SN74ACT32DR and 74VHC32M, the MC74ACT32ML1 offers identical logic functionality and electrical behavior in the EIAJ-14 package, making it the optimal choice for space-constrained industrial modules requiring gull-wing mounting and proven long-term availability through onsemi's industrial product roadmap.
Availability
MC74ACT32ML1 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, legacy system bus arbitration, and 5 V sensor interface logic requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for MC74ACT32ML1 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 is a global semiconductor supplier focused on energy-efficient technologies for automotive, industrial, cloud, medical, and IoT applications.
The MC74ACT32ML1 belongs to the 74ACT logic family, designed specifically for high-speed, TTL-compatible 5 V digital systems requiring robust noise immunity and industrial-grade reliability.
FAQ
What logic family does the MC74ACT32ML1 belong to, and how does it differ from 74AC?
The MC74ACT32ML1 belongs to the 74ACT (Advanced CMOS TTL-compatible) family. Unlike 74AC, which operates from 2.0–6.0 V and has CMOS-only inputs, the MC74ACT32ML1 is optimized for 4.5–5.5 V operation and features TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), allowing direct interface with legacy 74LS and 74F devices without level shifters. This makes the MC74ACT32ML1 uniquely suited for upgrading or maintaining 5 V TTL-based systems.
What is the maximum propagation delay of the MC74ACT32ML1 under industrial conditions?
The MC74ACT32ML1 guarantees a maximum propagation delay of 10.0 ns at VCC = 5.0 V ±0.5 V, CL = 50 pF, and TA = –40°C to +85°C. This value applies to both tPLH and tPHL transitions and is measured per gate with all other inputs held static. The MC74ACT32ML1 achieves this performance while maintaining ±24 mA output drive capability, distinguishing it from lower-drive alternatives.
Does the MC74ACT32ML1 require external pull-up or pull-down resistors on unused inputs?
Yes - the MC74ACT32ML1 has no internal input termination. Unused inputs must be tied to VCC or GND via hard connections or appropriate-value resistors (e.g., 10 kΩ) to prevent floating nodes, which can cause increased ICC, erratic switching, or EMI susceptibility. Leaving inputs unconnected violates recommended operating conditions and may compromise the reliability of the MC74ACT32ML1 in long-term deployment.
Can the MC74ACT32ML1 drive a 50 pF load at 5 MHz without signal degradation?
Yes - the MC74ACT32ML1 is fully characterized at CL = 50 pF and delivers ≤10 ns propagation delay with clean edges under those conditions. Its ±24 mA output drive ensures adequate slew rate for 5 MHz square waves, and its 4.5 pF input capacitance minimizes loading on preceding stages. When used with proper VCC bypassing and controlled-impedance routing, the MC74ACT32ML1 maintains signal fidelity across full industrial temperature range.
What package type is associated with the ML1 suffix in MC74ACT32ML1?
ML1 denotes the EIAJ-14 package (CASE 965), a 14-pin plastic leaded chip carrier with gull-wing leads and 0.65 mm pitch. This package is distinct from SOIC-14 (D), TSSOP-14 (DT), and PDIP-14 (N) variants. The MC74ACT32ML1 uses this footprint for higher I/O density and improved thermal performance in compact industrial modules compared to through-hole or standard SOIC alternatives.
MC74ACT32ML1 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:
- -
MC74ACT32ML1 FAQ
1.How can I place an order for MC74ACT32ML1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74ACT32ML1 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 MC74ACT32ML1 reliable?
The price and inventory of MC74ACT32ML1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74ACT32ML1 is usually 5 days.
3.What payment methods are accepted for MC74ACT32ML1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74ACT32ML1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74ACT32ML1?
MC74ACT32ML1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74ACT32ML1 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 MC74ACT32ML1?
For technical support, including MC74ACT32ML1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74ACT32ML1 requirements.
6.How does Aetrix verify that MC74ACT32ML1 is sourced from the original manufacturer or authorized distributors?
All MC74ACT32ML1 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 MC74ACT32ML1 meets industry standards.
7.What is the process for return or replacement of MC74ACT32ML1?
All MC74ACT32ML1 units undergo pre-shipment inspection (PSI). If there is an issue with MC74ACT32ML1, 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 MC74ACT32ML1 part is unused and in its original packaging.
Return procedure for MC74ACT32ML1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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