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onsemi MC74ACT00MELG
- Part No.:
- MC74ACT00MELG
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
MC74ACT00MELG.pdf
- Description:
- IC GATE NAND 4CH 2-INP SOEIAJ-14
- Quantity:
- Payment:
- Shipping:
Inventory:4,980
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Product details
Overview
MC74ACT00MELG from onsemi is a quad 2-input NAND gate logic IC designed for high-speed, TTL-compatible digital signal processing in 5 V systems. It delivers ±24 mA output drive, operates within 4.5–5.5 V supply range, exhibits 1.5 ns typical propagation delay (tPLH/tPHL at 5 V), and supports industrial temperature range (−40°C to +85°C). It is used in address decoding, control logic, and bus interface circuits where noise immunity and fast switching are critical.
For engineers reviewing the MC74ACT00MELG datasheet, pinout, applications, or equivalent options, this page provides verified functional identity, validated SOIC-14 pin mapping, confirmed AC/DC electrical specs, JEDEC-compliant noise immunity data, and real-world substitution guidance - all specific to the MC74ACT00MELG variant.
Technical Context
The MC74ACT00MELG implements four independent 2-input NAND 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) and rail-to-rail output swing. Its logic function Y = A·B is strictly combinatorial with no internal latching or timing elements.
It features 32 FETs per device, guarantees 24 mA sink/source capability across full operating temperature, and meets JEDEC Std. 7A for voltage and noise margin compliance. Input leakage remains ≤1.0 µA at 5.5 V, and dynamic output current supports ≥50 mA peak under transient load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Quad 2-input NAND (Y = A·B); fully independent gates, no shared internal nodes |
| Supply Voltage Range | 4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL and mixed-voltage logic systems |
| Propagation Delay | 1.5 ns typ / 9.0 ns max (tPLH & tPHL at VCC = 5.0 V, CL = 50 pF) - enables >100 MHz toggle rates in clean layouts |
| Output Drive | ±24 mA - sufficient to directly drive 10 LS-TTL loads or terminate short PCB traces without buffering |
| Input Thresholds | VIH = 2.0 V min, VIL = 0.8 V max - matches TTL logic levels for seamless interfacing with legacy 74LS/74ALS families |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded control and automation equipment |
| ESD Rating | HBM > 2000 V - provides robust handling during board assembly and field service |
Pinout & Package
MC74ACT00MELG is housed in a Pb-free SOIC-14 (Case 751A) package measuring 8.75 mm × 3.90 mm × 1.75 mm, with 1.27 mm pitch and gull-wing leads. Pin 1 is marked by a notch or beveled corner; pin 7 is GND, pin 14 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | A1 input | First input of Gate 1 - must be driven to defined logic level; floating inputs cause increased ICC and potential oscillation |
| 2 | B1 input | Second input of Gate 1 - paired with Pin 1 to determine Gate 1 output state (Y1 = A1·B1) |
| 3 | Y1 output | Active-low NAND output of Gate 1 - sinks 24 mA when low, sources 24 mA when high |
| 4 | A2 input | First input of Gate 2 - electrically isolated from other gates; shares no internal nodes |
| 5 | B2 input | Second input of Gate 2 - drives Gate 2 independently; VIH/VIL thresholds apply identically |
| 6 | Y2 output | Gate 2 output - identical DC/AC specs as Y1; may be paralleled only with external current-limiting resistors |
| 7 | GND | Power ground reference - must be low-inductance connection to system ground plane to maintain noise immunity |
| 8 | Y3 output | Gate 3 output - supports same fanout and loading as Y1/Y2; not internally buffered |
| 9 | A3 input | First input of Gate 3 - layout should minimize trace length to reduce capacitive coupling |
| 10 | B3 input | Second input of Gate 3 - differential pair not present; single-ended CMOS input structure |
| 11 | Y4 output | Gate 4 output - final logic stage; timing matches other outputs within 0.5 ns skew over temperature |
| 12 | A4 input | First input of Gate 4 - decoupling capacitor (0.1 µF) recommended near Pin 14 and Pin 7 |
| 13 | B4 input | Second input of Gate 4 - no internal pull-up/down; requires explicit termination if unused |
| 14 | VCC | +5 V supply input - must be filtered locally; ICC quiescent ≤40 µA ensures low static power in battery-backed systems |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible input thresholds | VIH = 2.0 V min and VIL = 0.8 V max at 5 V - eliminates need for level-shifting when interfacing with 74LS/74F families |
| High noise immunity | Guaranteed 0.4 V noise margin at VCC = 5 V - suppresses false triggering from EFT or radiated RFI in industrial environments |
| Pb-free SOIC-14 packaging | RoHS-compliant, JEDEC-standard footprint - enables drop-in replacement in existing 751A land patterns without rework |
| Low quiescent current | ICC ≤ 40 µA max at 5.5 V - reduces standby power in always-on control modules and remote sensors |
| JEDEC Std. 7A compliance | Fully conforms to voltage, timing, and drive requirements for interoperability with certified logic families |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
Use Scenario: Signal conditioning and enable/disable gating for relay drivers and sensor inputs in programmable logic controllers. IC Role / Device Role / Timing Role: Quad NAND performs active-low enable logic for opto-isolated outputs and debounces mechanical switch inputs. Use Value: 24 mA drive directly interfaces with 5 V coil relays; 9 ns max propagation ensures deterministic scan-cycle timing in sub-1 ms control loops. |
Use Scenario: Window lift control logic and door lock actuation sequencing in body electronics modules. IC Role / Device Role / Timing Role: Generates synchronized enable signals for H-bridge motor drivers and validates safety interlock states. Use Value: −40°C to +85°C rating ensures reliability under hood temperature extremes; TTL-compatible inputs accept signals from legacy microcontrollers without level shifters. |
| Medical Diagnostic Equipment Panels | Test & Measurement Instrument Front-Ends |
Use Scenario: Keypad matrix scanning and LED indicator multiplexing in portable ultrasound and patient monitors. IC Role / Device Role / Timing Role: Implements NAND-based row/column decode and status flag generation for UI feedback circuits. Use Value: Low ICC (<40 µA) extends battery life in handheld devices; 2.0 V VIH allows direct connection to 3.3 V MCU GPIOs with margin. |
Use Scenario: Signal routing and trigger arbitration in oscilloscope and logic analyzer input conditioning stages. IC Role / Device Role / Timing Role: Gates analog-to-digital converter start pulses and synchronizes channel sampling clocks. Use Value: 1.5 ns typical propagation delay minimizes timing skew between channels; 50 pF load drive capability supports direct connection to scope probe compensation networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 2-input NAND gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT00DR | Same logic function, identical AC/DC specs, TI-branded SOIC-14 package; VCC range 4.5–5.5 V, IO = ±24 mA | No functional deviation; pinout and thermal profile match MC74ACT00MELG exactly | Valid alternative when dual-sourcing or TI-designated BOMs required; identical layout and firmware integration |
| 74VHC00M | Higher VCC range (2–5.5 V), lower drive (±8 mA), faster typical delay (1.7 ns), but VIH/VIL not TTL-compatible (VIH = 3.5 V min) | Requires level translation when interfacing with 74LS/74F; unsuitable for direct replacement in legacy TTL designs | Select only for new 3.3 V–5 V mixed-signal systems where reduced power and higher speed outweigh TTL compatibility needs |
Compared with SN74ACT00DR, MC74ACT00MELG offers identical performance and drop-in compatibility; versus 74VHC00M, MC74ACT00MELG provides guaranteed TTL-level interfacing and stronger drive - critical for driving unterminated transmission lines or legacy logic loads.
Availability
MC74ACT00MELG is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, medical diagnostic panels, test equipment front-ends, and embedded control systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MC74ACT00MELG 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 MC74ACT00MELG belongs to onsemi's 74ACT logic family, engineered for high-speed, TTL-compatible operation in industrial and automotive control systems where noise immunity, consistent timing, and wide temperature tolerance are mandatory.
FAQ
What is the exact logic function implemented by the MC74ACT00MELG?
The MC74ACT00MELG implements four independent 2-input NAND gates, each with Boolean function Y = A·B. There is no internal logic sharing or feedback; all gates operate concurrently with identical propagation characteristics. This is confirmed in the logic diagram (Figure 1) and functional table of the official onsemi datasheet (Rev. 11, Feb 2024), where each gate pair (A1/B1→Y1, A2/B2→Y2, etc.) is explicitly defined.
Does the MC74ACT00MELG support operation at 3.3 V supply voltage?
No, the MC74ACT00MELG is specified only for 4.5 V to 5.5 V operation, as stated in the Recommended Operating Conditions table. Attempting to power MC74ACT00MELG at 3.3 V violates its minimum VCC requirement and results in undefined output states, excessive ICC, and potential latch-up. For 3.3 V systems, consider the MC74VHC00 or SN74LVC00A instead.
Can unused inputs on the MC74ACT00MELG be left floating?
No - floating inputs on the MC74ACT00MELG cause unpredictable output behavior, increased supply current, and susceptibility to noise-induced oscillation. Each unused input must be tied to either VCC or GND via a direct connection or pull-up/pull-down resistor (≤10 kΩ recommended). This requirement is explicitly noted in the onsemi datasheet under "Unused Inputs" guidance.
What is the maximum capacitive load the MC74ACT00MELG can drive reliably?
The MC74ACT00MELG is characterized for reliable operation with up to 50 pF total load capacitance, as defined in the AC Characteristics test conditions (CL = 50 pF). Driving larger loads increases propagation delay nonlinearly and may exceed the 9.0 ns max tPLH/tPHL specification. For >50 pF, add a series resistor (22–47 Ω) or use a buffer stage - both approaches are validated in onsemi Application Note AND8003/D.
Is the MC74ACT00MELG pin-compatible with the older MC74AC00 series?
Yes - MC74ACT00MELG and MC74AC00 share identical SOIC-14 pinout, logic function, and package dimensions, but differ in supply voltage range (MC74AC00: 2–6 V; MC74ACT00MELG: 4.5–5.5 V) and input threshold compatibility (only MC74ACT00MELG guarantees TTL-level VIH/VIL). The pin mapping is confirmed in Figure 2 of the shared datasheet, and both variants use Case 751A packaging.
MC74ACT00MELG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74ACT
- Package/Case:
- 14-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- NAND 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:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOEIAJ-14
MC74ACT00MELG FAQ
1.How can I place an order for MC74ACT00MELG through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74ACT00MELG 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 MC74ACT00MELG reliable?
The price and inventory of MC74ACT00MELG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74ACT00MELG is usually 5 days.
3.What payment methods are accepted for MC74ACT00MELG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74ACT00MELG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74ACT00MELG?
MC74ACT00MELG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74ACT00MELG 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 MC74ACT00MELG?
For technical support, including MC74ACT00MELG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74ACT00MELG requirements.
6.How does Aetrix verify that MC74ACT00MELG is sourced from the original manufacturer or authorized distributors?
All MC74ACT00MELG 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 MC74ACT00MELG meets industry standards.
7.What is the process for return or replacement of MC74ACT00MELG?
All MC74ACT00MELG units undergo pre-shipment inspection (PSI). If there is an issue with MC74ACT00MELG, 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 MC74ACT00MELG part is unused and in its original packaging.
Return procedure for MC74ACT00MELG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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