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onsemi MC74HC08AFELG
- Part No.:
- MC74HC08AFELG
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
MC74HC08AFELG.pdf
- Description:
- IC GATE AND 4CH 2-INP SOEIAJ-14
- Quantity:
- Payment:
- Shipping:
Inventory:4,722
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Product details
Overview
MC74HC08AFELG from onsemi is a quad 2-input AND gate in high-performance silicon-gate CMOS technology, operating from 2.0 V to 6.0 V supply, delivering 10 LSTTL load drive capability with propagation delay as low as 13 ns at 6.0 V, and used for digital logic level translation and signal gating in industrial control and embedded interface circuits.
For engineers reviewing the MC74HC08AFELG datasheet, pinout, applications, or equivalent options, this page provides verified pin mapping, JEDEC-compliant DC/AC specifications, TSSOP-14 package details, and validated alternative options for logic-level AND function implementation.
Technical Context
The MC74HC08AFELG implements four independent AND gates in a single monolithic CMOS IC, with inputs compatible with standard CMOS outputs and pullup-enabled compatibility with LSTTL outputs. Its architecture supports rail-to-rail input voltage range (0 V to VCC) and guarantees noise immunity per JEDEC Std. 7A.
Each gate features symmetrical tPLH/tPHL propagation delays and matched output transition times (tTLH/tTHL), with input leakage current ≤ ±1.0 µA and quiescent supply current ≤ 40 µA across –55 °C to +125 °C operating temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Quad 2-input AND gate (Y = A·B per channel) |
| Supply Voltage Range | 2.0 V to 6.0 V - enables direct interface with 3.3 V and 5 V logic systems without level shifters |
| Propagation Delay | 13 ns max at VCC = 6.0 V - supports >30 MHz toggle rates in clean logic paths |
| Output Drive | 10 LSTTL loads - sufficient to drive multiple legacy TTL inputs without buffering |
| Input Leakage | ±1.0 µA max at 125 °C - ensures stable logic states in low-power standby modes |
| Operating Temperature | –55 °C to +125 °C - qualified for extended industrial and automotive under-hood environments |
| ESD Rating | HBM >2000 V - provides robust handling during PCB assembly and field service |
Pinout & Package
TSSOP-14 surface-mount package (Case 948G), 4.9 mm × 4.4 mm × 1.2 mm body, 0.65 mm pitch, Pb-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | A1 (Input) | First input of Gate 1 - must be tied to defined logic level if unused |
| 2 | B1 (Input) | Second input of Gate 1 - shares same noise-immunity and voltage thresholds as all inputs |
| 3 | Y1 (Output) | AND result of A1·B1 - capable of sourcing/sinking 25 mA peak per JEDEC ratings |
| 4 | A2 (Input) | First input of Gate 2 - electrically isolated but process-matched to Gate 1 |
| 5 | B2 (Input) | Second input of Gate 2 - identical VIH/VIL thresholds (1.5 V / 0.5 V at 2.0 V VCC) |
| 6 | Y2 (Output) | AND result of A2·B2 - exhibits same tPLH/tPHL delay distribution as Y1 |
| 7 | GND | Ground reference for all logic and power domains - mandatory low-impedance connection |
| 8 | Y3 (Output) | AND result of A3·B3 - shares same CPD = 20 pF for dynamic power estimation |
| 9 | A3 (Input) | First input of Gate 3 - compatible with CMOS and pulled-up LSTTL outputs |
| 10 | B3 (Input) | Second input of Gate 3 - no internal pullup/pulldown; external bias required if floating |
| 11 | Y4 (Output) | AND result of A4·B4 - fully specified for VOL ≤ 0.1 V at IOUT = 20 µA |
| 12 | A4 (Input) | First input of Gate 4 - matches input capacitance Cin ≤ 10 pF across temperature |
| 13 | B4 (Input) | Second input of Gate 4 - identical AC/DC characteristics to Pins 1 and 2 |
| 14 | VCC | Positive supply rail - must be decoupled locally with ≥100 nF ceramic capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input compatibility | Accepts 0 V to VCC inputs across full temperature range - eliminates need for external level-shifting resistors |
| LSTTL load drive | Directly drives 10 LSTTL inputs without fanout buffers - reduces BOM count in mixed-logic systems |
| Low quiescent current | ICC ≤ 40 µA at 125 °C - enables use in always-on monitoring circuits with µA-level budget constraints |
| JEDEC Std. 7A compliance | Fully meets industry-standard noise immunity and switching behavior requirements - simplifies system-level EMC validation |
| Pb-free & RoHS | Halogen-free construction with "G" suffix marking - satisfies global environmental compliance mandates without derating |
Applications
| Industrial PLC I/O Expansion | Automotive Body Control Module |
|---|---|
|
Use Scenario: Enabling discrete sensor inputs only when master enable signal is asserted in programmable logic controllers. IC Role / Device Role / Timing Role: Quad AND gate performing synchronous gating of 4 independent 24 V opto-isolated inputs before ADC sampling. Use Value: Reduces false triggers by ensuring all sensor paths require dual validation (sensor + system enable), leveraging <13 ns delay for deterministic cycle timing. |
Use Scenario: Controlling LED status indicators based on combined door lock and ignition state in vehicle body electronics. IC Role / Device Role / Timing Role: Logic-level combiner for two independent CAN-derived signals driving common-anode LED drivers. Use Value: Enables fail-safe visual feedback using only one IC instead of discrete transistors, with guaranteed 0.1 V VOL supporting 3.3 V MCU GPIO interfacing. |
| Medical Equipment Power Sequencing | Consumer Appliance Safety Interlock |
|
Use Scenario: Validating dual redundant safety sensors before enabling high-voltage subsystems in diagnostic imaging devices. IC Role / Device Role / Timing Role: Hardware-enforced AND gate ensuring both thermal and motion sensors report safe state prior to power-up sequence. Use Value: Provides deterministic, zero-software-dependency interlock with –55 °C to +125 °C operation covering sterilization and ambient conditions. |
Use Scenario: Preventing microwave oven magnetron activation unless door switch and timer outputs are simultaneously high. IC Role / Device Role / Timing Role: Critical safety logic element combining mechanical and electronic enable signals in Class I appliance control board. Use Value: Meets IEC 60335-1 requirements via hardware gating - no firmware update can bypass this layer, supported by AEC-Q100-qualified variant lineage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 2-input AND gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC08DR | SOIC-14 package, identical AC/DC specs, same 2–6 V VCC range, but not AEC-Q100 qualified | Suitable for commercial-grade industrial boards where automotive qualification is unnecessary | Select SN74HC08DR when cost-sensitive non-automotive designs prioritize SOIC footprint over TSSOP density |
| MC74HC08ADTR2G | Same die, same TSSOP-14 package, identical marking "HC08A", but supplied in 2500-unit tape-and-reel vs. MC74HC08AFELG's 250-unit tray | Identical electrical and thermal performance; differs only in packaging format and order quantity | Choose MC74HC08ADTR2G for automated SMT production requiring reel-fed placement; MC74HC08AFELG suits prototyping and low-volume assembly |
Compared with SN74HC08DR, MC74HC08AFELG offers identical logic performance in a smaller TSSOP-14 footprint and shares qualification lineage with AEC-Q100 variants; versus MC74HC08ADTR2G, it delivers the same functionality in a tray-packaged form optimized for manual or semi-automated insertion.
Availability
MC74HC08AFELG is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, medical equipment power sequencing, and consumer appliance safety interlocks requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MC74HC08AFELG 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 sensing solutions for automotive, industrial, and cloud infrastructure markets.
The MC74HC08AFELG belongs to the 74HC logic family designed for high-speed, low-power CMOS-compatible digital interfacing - targeting applications demanding robust noise immunity, wide supply range, and drop-in replacement for legacy TTL logic.
FAQ
What is the maximum operating supply voltage for MC74HC08AFELG?
The MC74HC08AFELG supports a DC supply voltage range of 2.0 V to 6.0 V, with absolute maximum rating of +6.5 V. Operation above 6.0 V is outside recommended conditions and may compromise reliability or parametric performance per the datasheet's Maximum Ratings table.
Does MC74HC08AFELG support direct connection to LSTTL outputs?
Yes, MC74HC08AFELG inputs are compatible with Standard CMOS outputs and, when used with pullup resistors, also interface directly to LSTTL outputs. This dual compatibility is explicitly confirmed in the device's datasheet introduction and functional description.
Is MC74HC08AFELG pin-compatible with the 74LS08?
Yes, MC74HC08AFELG is identical in pinout to the 74LS08, as stated in the datasheet's first paragraph. All 14 pins - including VCC, GND, and the four A/B/Y signal pairs - occupy identical positions in the TSSOP-14 package.
What is the propagation delay of MC74HC08AFELG at 5 V supply?
At VCC = 5.0 V and TA ≤ 25 °C, the MC74HC08AFELG exhibits a maximum propagation delay (tPLH/tPHL) of 16 ns. This value degrades to 19 ns at ≤ 85 °C and 22 ns at ≤ 125 °C per the AC Characteristics table.
Can unused inputs on MC74HC08AFELG be left floating?
No - unused inputs on MC74HC08AFELG must be tied to a valid logic level (either GND or VCC) as specified in Note 3 of the Recommended Operating Conditions table. Floating inputs risk increased ICC, erratic switching, and ESD susceptibility due to CMOS input structure.
MC74HC08AFELG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74HC
- Package/Case:
- 14-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- AND Gate
- Number of Circuits:
- 4
- Number of Inputs:
- 2
- Features:
- -
- Voltage - Supply:
- 2V ~ 6V
- Current - Quiescent (Max):
- 1 µA
- Current - Output High, Low:
- 5.2mA, 5.2mA
- Input Logic Level - Low:
- 0.5V ~ 1.8V
- Input Logic Level - High:
- 1.5V ~ 4.2V
- Max Propagation Delay @ V, Max CL:
- 13ns @ 6V, 50pF
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOEIAJ-14
MC74HC08AFELG FAQ
1.How can I place an order for MC74HC08AFELG through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74HC08AFELG 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 MC74HC08AFELG reliable?
The price and inventory of MC74HC08AFELG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74HC08AFELG is usually 5 days.
3.What payment methods are accepted for MC74HC08AFELG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74HC08AFELG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74HC08AFELG?
MC74HC08AFELG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74HC08AFELG 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 MC74HC08AFELG?
For technical support, including MC74HC08AFELG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74HC08AFELG requirements.
6.How does Aetrix verify that MC74HC08AFELG is sourced from the original manufacturer or authorized distributors?
All MC74HC08AFELG 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 MC74HC08AFELG meets industry standards.
7.What is the process for return or replacement of MC74HC08AFELG?
All MC74HC08AFELG units undergo pre-shipment inspection (PSI). If there is an issue with MC74HC08AFELG, 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 MC74HC08AFELG part is unused and in its original packaging.
Return procedure for MC74HC08AFELG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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