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onsemi MC74ACT32ML2
- Part No.:
- MC74ACT32ML2
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- -
- Datasheet:
-
MC74ACT32ML2.pdf
- Description:
- IC GATE OR 2-INP
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
MC74ACT32ML2 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 featuring 9.0 ns max propagation delay at 5 V/50 pF. It is used in digital logic interfacing, bus arbitration, and level translation in industrial control systems.
For engineers reviewing the MC74ACT32ML2 datasheet, pinout, applications, or equivalent options, key selection criteria include input compatibility with TTL logic families, guaranteed 24 mA drive strength, 5 V operation only, TSSOP-14 package thermal performance, and AC/ACT family timing behavior under load.
Technical Context
The MC74ACT32ML2 implements four independent 2-input OR gates using advanced CMOS technology with buffered TTL-compatible input stages. Its input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5.5 V) ensure reliable interfacing with legacy 5 V TTL outputs.
It operates strictly within 4.5–5.5 V supply range and exhibits symmetric propagation delays (tPLH/tPHL ≤ 10.0 ns at 5 V/50 pF), with low quiescent ICC ≤ 40 µA and input leakage IIN ≤ ±1.0 µA over –40°C to +85°C ambient.
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 |
| Output Drive | ±24 mA - supports direct driving of multiple TTL inputs or moderate capacitive loads |
| Propagation Delay | ≤10.0 ns at 5 V/50 pF - enables reliable operation up to ~50 MHz toggle rate in simple combinatorial paths |
| Input Compatibility | TTL-compatible - VIH ≥ 2.0 V, VIL ≤ 0.8 V at 5.5 V - interfaces directly with 74LS, 74F, and other 5 V TTL outputs |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and automation environments |
Pinout & Package
EIAJ-14 (JEDEC MO-153) thin-shrink small-outline package (TSSOP-14), 5.0 mm × 6.4 mm body, 0.65 mm lead pitch, surface-mount, moisture sensitivity level 1 (MSL1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5, 8, 9, 11, 12 | Input A/B of OR gates | Eight total inputs across four gates; each pair feeds one OR function |
| 3, 6, 10, 13 | OR Output | Four buffered CMOS outputs; each capable of sourcing/sinking 24 mA |
| 7 | GND | Ground reference for all inputs, outputs, and internal circuitry |
| 14 | VCC | Positive supply terminal - must be decoupled locally with 0.1 µF ceramic capacitor |
Key Features
| Feature | Design Value |
|---|---|
| TTL-Compatible Inputs | Enables direct connection to legacy 5 V TTL outputs without level-shifting circuitry |
| High-Drive Outputs | ±24 mA drive supports fan-out to 10+ standard TTL loads or capacitive loads ≤ 50 pF |
| Low Propagation Delay | ≤10 ns at 5 V ensures timing predictability in synchronous logic and state-machine glue logic |
| Industrial Temperature Range | –40°C to +85°C operation supports deployment in factory automation, motor drives, and power supplies |
Applications
| Industrial PLC I/O Expansion | Digital Bus Arbitration Logic |
|---|---|
Use Scenario: Adding discrete OR logic to combine interrupt signals from multiple field sensors before routing to a microcontroller IRQ line. IC Role / Device Role / Timing Role: Glue logic OR gate aggregating asynchronous active-high sensor alerts into a single prioritized interrupt request. Use Value: Eliminates need for software polling; hardware-level signal consolidation reduces MCU latency and firmware complexity. | Use Scenario: Resolving bus master contention between two microcontrollers sharing a common parallel data bus. IC Role / Device Role / Timing Role: OR-ing BUSREQ signals to generate a unified bus grant arbitration pulse. Use Value: Ensures deterministic bus access priority without external latches or clocked arbitration logic. |
| Legacy System Level Translation | Power Sequencing Control |
Use Scenario: Interfacing a modern FPGA I/O bank (5 V-tolerant but 3.3 V logic) with older 5 V TTL peripherals. IC Role / Device Role / Timing Role: Bidirectional voltage-level translator via pull-up configuration and TTL-compatible thresholds. Use Value: Provides robust 5 V logic-level reception without dedicated level shifters or resistor networks. | Use Scenario: Enabling power rails in sequence by OR-ing enable signals from multiple supervisory circuits. IC Role / Device Role / Timing Role: Active-high OR gate combining reset, watchdog timeout, and thermal fault signals to disable downstream regulators. Use Value: Guarantees immediate power-down on any fault condition while maintaining fail-safe default-off behavior. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad OR gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT32DR | Same logic function, identical AC/DC specs, SOIC-14 package (wider 3.9 mm body vs. TSSOP-14's 4.4 mm width) | Requires PCB layout change due to different footprint and thermal pad absence | Select when board space allows SOIC and reflow profile favors larger pitch |
| 74VHC32M | Higher VIH (3.33 V min at 5 V), lower IOL (8 mA), 12 ns max tPD - optimized for low-power, not TTL interface | Not suitable for direct TTL input interfacing; requires external pull-ups or buffer stages | Select only for new 5 V CMOS-only designs where power efficiency outweighs interface flexibility |
Compared with SN74ACT32DR and 74VHC32M, the MC74ACT32ML2 uniquely balances TTL compatibility, 24 mA drive, and TSSOP-14 compactness-making it optimal for space-constrained industrial boards requiring legacy signal interoperability.
Availability
MC74ACT32ML2 is available at Aetrix Electronics and suitable for industrial PLCs, motor control interfaces, and legacy system upgrades requiring stable component supply and long-term obsolescence management.
Supply support for MC74ACT32ML2 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MC74ACT32ML2 belongs to onsemi's legacy ACT logic family, designed specifically for high-speed, TTL-compatible 5 V digital interfacing in industrial and control systems where reliability and signal integrity are critical.
FAQ
What logic family does MC74ACT32ML2 belong to, and how does it differ from standard AC devices?
The MC74ACT32ML2 belongs to the 74ACT (Advanced CMOS TTL-compatible) logic family. Unlike 74AC devices that use CMOS input thresholds, MC74ACT32ML2 features TTL-compatible inputs (VIH ≥ 2.0 V, VIL ≤ 0.8 V at 5.5 V), enabling direct interfacing with 74LS and other 5 V TTL outputs. Its supply range is narrower (4.5–5.5 V) versus 74AC (2.0–6.0 V), and it delivers identical ±24 mA output drive. This makes MC74ACT32ML2 ideal for mixed-logic-system upgrades where TTL signal sources must drive modern CMOS loads without level shifters.
What is the maximum operating temperature range specified for MC74ACT32ML2?
The MC74ACT32ML2 is rated for an operating ambient temperature range of –40°C to +85°C, meeting industrial-grade environmental requirements. This specification is validated across all DC and AC parameters in the datasheet, including propagation delay, output drive, and input thresholds. The device's junction temperature limit is 140°C under PDIP conditions, but for the ML2 (TSSOP-14) package, thermal resistance and power dissipation ensure safe operation within the full –40°C to +85°C ambient range when mounted per JEDEC standards with adequate PCB copper area.
Can MC74ACT32ML2 operate from a 3.3 V supply?
No, MC74ACT32ML2 cannot operate reliably from a 3.3 V supply. Its recommended operating supply voltage is strictly 4.5 V to 5.5 V, as defined in the "RECOMMENDED OPERATING CONDITIONS" table. At 3.3 V, input thresholds fall outside specification (VIH minimum is 2.0 V, but input recognition becomes marginal), output drive collapses below usable levels, and propagation delay increases unpredictably. Using MC74ACT32ML2 below 4.5 V risks functional failure and is outside qualification. For 3.3 V systems, consider 74LVC32 or 74AUP32 variants instead.
What package type is used for MC74ACT32ML2, and what are its key mechanical features?
The MC74ACT32ML2 uses the EIAJ-14 (also known as TSSOP-14) package, case number 948G, with dimensions 5.0 mm × 6.4 mm and 0.65 mm lead pitch. It features gull-wing leads, no thermal pad, and complies with JEDEC MO-153 outline. The "L2" suffix denotes tape-and-reel packaging (2000 units per reel), and the package is rated MSL1 (moisture sensitivity level 1), meaning it can be stored indefinitely at ≤30°C/60% RH without baking prior to reflow. Its compact size supports high-density PCB layouts typical in industrial controllers and modular I/O systems.
Does MC74ACT32ML2 support hot-swap or live-insertion applications?
No, MC74ACT32ML2 is not designed for hot-swap or live-insertion applications. It lacks bus-hold, power-up 3-state, or Ioff (power-off protection) features. During power sequencing, unpowered VCC with live inputs may cause excessive current flow through internal clamp diodes, risking latch-up or parametric degradation. For hot-swap scenarios, use purpose-built hot-swap controllers or logic families with Ioff specification (e.g., 74LVC series). Always ensure MC74ACT32ML2 power is established before applying valid input signals in system-level designs.
MC74ACT32ML2 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:
- -
MC74ACT32ML2 FAQ
1.How can I place an order for MC74ACT32ML2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74ACT32ML2 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 MC74ACT32ML2 reliable?
The price and inventory of MC74ACT32ML2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74ACT32ML2 is usually 5 days.
3.What payment methods are accepted for MC74ACT32ML2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74ACT32ML2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74ACT32ML2?
MC74ACT32ML2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74ACT32ML2 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 MC74ACT32ML2?
For technical support, including MC74ACT32ML2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74ACT32ML2 requirements.
6.How does Aetrix verify that MC74ACT32ML2 is sourced from the original manufacturer or authorized distributors?
All MC74ACT32ML2 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 MC74ACT32ML2 meets industry standards.
7.What is the process for return or replacement of MC74ACT32ML2?
All MC74ACT32ML2 units undergo pre-shipment inspection (PSI). If there is an issue with MC74ACT32ML2, 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 MC74ACT32ML2 part is unused and in its original packaging.
Return procedure for MC74ACT32ML2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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