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onsemi MC74ACT20ML1
- Part No.:
- MC74ACT20ML1
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- -
- Datasheet:
-
MC74ACT20ML1.pdf
- Description:
- IC GATE NAND 4-INP
- Quantity:
- Payment:
- Shipping:
Inventory:4,000
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Product details
Overview
MC74ACT20ML1 from onsemi is a dual 4-input NAND gate IC with TTL-compatible inputs, operating at 4.5–5.5 V supply, delivering ±24 mA output drive, and featuring 5.5 ns typical propagation delay (tPLH/tPHL) at 5 V/50 pF. It is used in digital logic interfacing, bus buffering, and control signal conditioning in industrial PLCs and instrumentation systems.
For engineers reviewing the MC74ACT20ML1 datasheet, pinout, applications, or equivalent options, key selection criteria include input voltage thresholds (VIH = 2.0 V min, VIL = 0.8 V max), output drive capability (IOH/ IOL = ±24 mA), AC timing at 5 V, and EIAJ-14 (CASE 965) package compatibility.
Technical Context
The MC74ACT20ML1 implements two independent 4-input NAND gates in a single monolithic CMOS device. Its TTL-compatible inputs accept standard 5 V logic thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), enabling direct interface with legacy 74LS and 74F families without level-shifting.
It operates strictly within 4.5–5.5 V VCC, supports –40°C to +85°C ambient range, and delivers rail-to-rail CMOS output swing with VOH ≥ 4.4 V and VOL ≤ 0.44 V at ±24 mA load - meeting industrial logic interface requirements under full drive conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - ensures compatibility with regulated 5 V systems and tolerance to supply ripple. |
| VIH / VIL | 2.0 V min / 0.8 V max - guarantees reliable recognition of TTL-level HIGH/LOW inputs. |
| IOH / IOL | –24 mA / +24 mA - drives standard 50 Ω transmission lines or multiple 74ACT inputs without fanout limitation. |
| tPLH / tPHL | 1.5 ns min / 10.5 ns max (5 V, 50 pF) - enables use in sub-100 MHz synchronous logic paths. |
| VOH / VOL | ≥4.4 V / ≤0.44 V at ±24 mA - maintains noise margin >0.4 V in noisy industrial environments. |
| ICC (Quiescent) | ≤40 µA - supports low-static-power system design even with multiple gates enabled. |
Pinout & Package
EIAJ-14 (CASE 965) surface-mount package - 14-pin plastic SOP variant with 1.27 mm pitch, JEDEC-standard footprint, and moisture sensitivity level (MSL) 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5 | Input A1, B1, C1, D1 | First NAND gate inputs - all must be HIGH for Output 6 to go LOW. |
| 6 | Output Y1 | Inverted AND result of Pins 1,2,4,5 - active-low logic output. |
| 8, 9, 11, 12 | Input A2, B2, C2, D2 | Second NAND gate inputs - independent of Gate 1, supports dual logic functions. |
| 13 | Output Y2 | Inverted AND result of Pins 8,9,11,12 - electrically isolated from Y1. |
| 7 | GND | Digital ground reference - must be low-impedance connection to minimize switching noise. |
| 14 | VCC | Positive supply - bypass capacitor (0.1 µF) required adjacent to Pin 14 for stable operation. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-Compatible Inputs | Accepts 0.8 V/2.0 V thresholds - eliminates need for external level translators when interfacing with 74LS or microcontroller GPIOs. |
| High-Drive Outputs | ±24 mA per output - directly drives LEDs, small relays, or 10+ 74ACT inputs without buffer stages. |
| Low Propagation Delay | 5.5 ns typical (5 V, 50 pF) - supports timing-critical combinational logic in real-time control loops. |
| Wide Operating Temperature | –40°C to +85°C - qualified for deployment in uncontrolled industrial enclosures and outdoor equipment. |
Applications
| Industrial Control Logic | Microcontroller Bus Interface |
|---|---|
Use Scenario: Decoding address lines and generating chip-select signals in PLC backplane modules. IC Role / Device Role / Timing Role: Dual NAND gate performing active-low enable logic for peripheral selection. Use Value: Eliminates discrete resistor-transistor logic, reduces board area by 60%, and improves timing predictability vs. discrete solutions. | Use Scenario: Interfacing 8-bit microcontroller parallel bus to external SRAM or LCD controller with inverted control strobes. IC Role / Device Role / Timing Role: Level-shifting and signal inversion for WR̅/RD̅/CS̅ generation. Use Value: Matches TTL input thresholds of legacy peripherals while providing CMOS output drive strength and noise immunity. |
| Test Equipment Signal Conditioning | Digital Power Sequencing |
Use Scenario: Combining multiple status flags (e.g., overvoltage, thermal fault, watchdog timeout) into a single system-fault interrupt line. IC Role / Device Role / Timing Role: Wired-OR logic aggregation using NAND gate with open-collector emulation via pull-up. Use Value: Enables fault prioritization without software polling; propagation delay <11 ns ensures sub-microsecond response. | Use Scenario: Enabling DC-DC converter rails only after upstream supplies stabilize, using power-good signals as NAND inputs. IC Role / Device Role / Timing Role: Synchronous power-up sequencing logic block with deterministic delay and glitch-free output. Use Value: Prevents latch-up in downstream FPGAs by enforcing strict voltage ramp order; quiescent current <40 µA minimizes standby loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 4-input NAND gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT20D | Same logic function, identical AC/DC specs, SOIC-14 (CASE 751A) package - 1.27 mm pitch but wider body than EIAJ-14. | Requires PCB footprint change; no thermal or electrical performance difference. | Select when SOIC-14 is preferred for reworkability or existing board layout reuse. |
| 74VHC20M | Higher VCC range (2–5.5 V), lower drive (±8 mA), slower speed (tPD = 7.5 ns typ), same EIAJ-14 package. | Not suitable for 24 mA loads or TTL interface; better for battery-powered low-power designs. | Choose only if supply voltage varies below 4.5 V or drive requirement is ≤8 mA. |
Compared with SN74ACT20D and 74VHC20M, the MC74ACT20ML1 uniquely combines EIAJ-14 footprint, TTL-compatible inputs, and ±24 mA drive - making it optimal for space-constrained industrial boards requiring robust 5 V logic interfacing without redesign.
Availability
MC74ACT20ML1 is available at Aetrix Electronics and suitable for industrial control logic, microcontroller bus interface, test equipment signal conditioning, and digital power sequencing requiring stable component supply across extended temperature ranges.
Supply support for MC74ACT20ML1 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 manufacturer focused on energy-efficient technologies for automotive, industrial, cloud, and IoT applications.
The MC74ACT20ML1 belongs to the 74ACT advanced CMOS logic family, designed specifically for high-speed, TTL-compatible 5 V digital systems where noise immunity, drive strength, and timing precision are critical.
FAQ
What is the recommended supply voltage range for the MC74ACT20ML1?
The MC74ACT20ML1 is specified for operation between 4.5 V and 5.5 V. Operation outside this range may cause unreliable logic behavior or exceed absolute maximum ratings. The device is not rated for 3.3 V operation, and attempting to use it at 3.3 V will result in VIH/VIL threshold violations and potential functional failure. Always verify VCC stability within this window during system power-up and transient conditions.
Does the MC74ACT20ML1 support direct interface with 74LS-series logic devices?
Yes, the MC74ACT20ML1 has TTL-compatible inputs with VIH ≥ 2.0 V and VIL ≤ 0.8 V at 5 V supply, matching the output specifications of 74LS devices. This allows direct connection without level shifters. The MC74ACT20ML1 outputs also drive 74LS inputs reliably due to its ±24 mA capability, exceeding the 74LS input current requirements. No additional components are needed for interoperability.
What is the maximum capacitive load the MC74ACT20ML1 can drive while maintaining specified timing?
The MC74ACT20ML1 AC characteristics are guaranteed up to 50 pF load capacitance, with tPLH/tPHL specified at 1.5–10.5 ns (5 V). Driving >50 pF increases propagation delay nonlinearly and may cause marginal timing in high-speed designs. For loads exceeding 50 pF, add series termination or reduce trace length. The device's 40 pF typical power dissipation capacitance (CPD) confirms optimized internal node sizing for this target load.
Is the MC74ACT20ML1 pin-compatible with the MC74AC20ML1?
No, the MC74ACT20ML1 and MC74AC20ML1 are not pin-compatible replacements. While both are dual 4-input NANDs in EIAJ-14 packages, their input thresholds differ significantly: MC74AC20ML1 requires VIH ≥ 3.15 V (at 4.5 V), whereas MC74ACT20ML1 accepts VIH ≥ 2.0 V. Swapping them risks logic misreads. The MC74ACT20ML1 must be used where TTL compatibility is required; the MC74AC20ML1 suits pure CMOS systems.
What is the thermal performance of the MC74ACT20ML1 in the EIAJ-14 package?
The MC74ACT20ML1 in EIAJ-14 (CASE 965) has a junction-to-ambient thermal resistance (θJA) of approximately 120°C/W under standard JEDEC PCB conditions. At maximum rated power dissipation (≈25 mW static + dynamic), junction temperature rise remains within safe limits up to +85°C ambient. For sustained high-frequency operation, ensure adequate copper pour under Pin 7 (GND) and avoid enclosing the device in sealed enclosures without airflow.
MC74ACT20ML1 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:
- -
MC74ACT20ML1 FAQ
1.How can I place an order for MC74ACT20ML1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74ACT20ML1 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 MC74ACT20ML1 reliable?
The price and inventory of MC74ACT20ML1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74ACT20ML1 is usually 5 days.
3.What payment methods are accepted for MC74ACT20ML1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74ACT20ML1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74ACT20ML1?
MC74ACT20ML1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74ACT20ML1 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 MC74ACT20ML1?
For technical support, including MC74ACT20ML1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74ACT20ML1 requirements.
6.How does Aetrix verify that MC74ACT20ML1 is sourced from the original manufacturer or authorized distributors?
All MC74ACT20ML1 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 MC74ACT20ML1 meets industry standards.
7.What is the process for return or replacement of MC74ACT20ML1?
All MC74ACT20ML1 units undergo pre-shipment inspection (PSI). If there is an issue with MC74ACT20ML1, 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 MC74ACT20ML1 part is unused and in its original packaging.
Return procedure for MC74ACT20ML1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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