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onsemi MC74HCU04AFR1
- Part No.:
- MC74HCU04AFR1
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
MC74HCU04AFR1.pdf
- Description:
- IC GATE XNOR 4CH 2-INP 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
MC74HCU04AFR1 from onsemi is a hex unbuffered inverter IC in SOIC-14 package, implementing six independent CMOS inverters with 2.0–6.0 V supply range, 10 LSTTL load drive capability, and propagation delay as low as 12 ns at 6.0 V - used for oscillator circuits, pulse shaping, and high-impedance digital signal inversion in industrial control and sensor interface systems.
For engineers reviewing the MC74HCU04AFR1 datasheet, pinout, applications, or equivalent options, key selection considerations include its rail-to-rail input compatibility (CMOS/LSTTL), guaranteed operation down to –55°C, low 0.1 µA max input leakage at 6.0 V, and JEDEC Std. 7.0A compliance for legacy TTL interoperability.
Technical Context
The MC74HCU04AFR1 uses high-performance silicon-gate CMOS technology with single-stage inverter topology per channel. Each inverter exhibits symmetrical voltage transfer characteristics, operates without internal buffering, and supports direct connection to CMOS, NMOS, and TTL logic families via pullup resistors when interfacing with LSTTL outputs.
It delivers stable oscillation in crystal or RC configurations across 2.5–6.0 V, maintains high noise immunity (>40% of VCC), and achieves thermal resistance of 116 °C/W in SOIC-14. Chip complexity is 12 FETs (3 equivalent gates), with no internal feedback or hysteresis - distinguishing it from Schmitt-trigger variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0–6.0 V DC - enables direct use with 3.3 V and 5 V systems without level-shifting |
| Propagation Delay (tPLH/tPHL) | 12 ns max at VCC = 6.0 V - supports >30 MHz toggle rates in ring oscillators |
| Output Drive | 10 LSTTL loads - sufficient to drive multiple legacy TTL inputs without fanout buffers |
| Input Leakage Current | ±0.1 µA max at 6.0 V - preserves signal integrity in high-impedance sensor front-ends |
| Operating Temperature | –55°C to +125°C - qualified for extended industrial and under-hood automotive environments |
| Input Capacitance | 10 pF max - minimizes loading on preceding high-frequency or low-power stages |
| Power Dissipation Cap. (CPD) | 15 pF per inverter - enables accurate dynamic power estimation at 5 V and variable frequency |
Pinout & Package
MC74HCU04AFR1 is housed in a Pb-free SOIC-14 (Case 751A) package with 1.27 mm pitch, 8.55–8.75 mm body width, and 1.35–1.75 mm height. Pin 7 is GND; Pin 14 is VCC; each inverter has dedicated input (A1–A6) and output (Y1–Y6) pins arranged in alternating order.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 9, 11, 13 | Inverter Inputs (A1–A6) | High-impedance CMOS inputs compatible with TTL when pulled up; no internal termination |
| 2, 4, 6, 8, 10, 12 | Inverter Outputs (Y1–Y6) | Push-pull CMOS outputs capable of sourcing/sinking 2.4 mA at 3.0 V for TTL interfacing |
| 7 | GND | Ground reference for all six inverters; must be low-inductance connection for stable oscillation |
| 14 | VCC | Single positive supply rail shared by all inverters; decoupling capacitor required near this pin |
Key Features
| Feature | Design Value |
|---|---|
| Unbuffered Inverter Architecture | Enables precise phase control and minimal propagation skew in oscillator and amplifier feedback loops |
| JEDEC Std. 7.0A Compliance | Guarantees interoperability with legacy LS-TTL logic families without external level translation |
| Low Input Current (≤0.1 µA) | Permits use in ultra-low-power timing circuits and high-impedance analog-digital interface nodes |
| Wide Supply Range (2.0–6.0 V) | Supports mixed-voltage system design and battery-powered applications with varying cell count |
| Pb-Free, Halogen-Free, RoHS Compliant | Meets IPC-J-STD-020 moisture sensitivity Level 1 and UL 94 V-0 flammability requirements |
Applications
| Crystal Oscillator Circuit | RC-Based Pulse Shaper |
|---|---|
Use Scenario: Generating stable clock signals using a quartz crystal and two inverters in a Pierce configuration. IC Role / Device Role / Timing Role: First inverter provides gain; second provides 180° phase shift; remaining four unused or cascaded for buffering. Use Value: Achieves sub-100 ppm stability over temperature with no external transistors or op-amps required. |
Use Scenario: Converting slow-rising or noisy digital edges into clean, fast-transition square waves. IC Role / Device Role / Timing Role: Single inverter stage with RC network at input to create controlled delay and edge sharpening. Use Value: Reduces jitter in microcontroller reset lines and improves timing margin in asynchronous handshaking. |
| LED Driver Interface | High-Impedance Sensor Signal Amplifier |
Use Scenario: Driving discrete LEDs from low-current GPIO pins in industrial HMI panels. IC Role / Device Role / Timing Role: Inverter configured as active-low driver with current-limiting resistor on output. Use Value: Provides 5.2 mA sink capability at 6.0 V - sufficient for standard 2 mA indicator LEDs without external transistor. |
Use Scenario: Boosting weak signals from piezoelectric sensors or thermistor bridges before ADC sampling. IC Role / Device Role / Timing Role: Inverter biased in linear region via feedback resistors to operate as high-Z amplifier. Use Value: Delivers gain >100 with input impedance >100 MΩ - avoids loading sensitive passive sensor elements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC04DR | Higher ICC quiescent current (40 µA vs. 1 µA typ.), identical pinout and AC specs | Less suitable for battery-critical systems; same oscillator performance | Select when TI supply chain preference applies and µA-level standby current is not required |
| 74LVC04AD,118 | 3.3 V only (1.65–3.6 V), lower VIL/VIH thresholds, 5 ns tPD at 3.3 V | Not usable below 1.65 V or above 3.6 V; faster but narrower voltage window | Choose for high-speed 3.3 V-only designs where 2.0–6.0 V flexibility is unnecessary |
Compared with SN74HC04DR and 74LVC04AD,118, the MC74HCU04AFR1 uniquely supports full 2.0–6.0 V operation with sub-µA input leakage and JEDEC 7.0A TTL compatibility - making it optimal for mixed-voltage industrial systems requiring long-term reliability and legacy interface support.
Availability
MC74HCU04AFR1 is available at Aetrix Electronics and suitable for industrial control panels, automotive body electronics, and sensor signal conditioning systems requiring stable component supply across extended temperature ranges and multi-vendor sourcing strategies.
Supply support for MC74HCU04AFR1 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 focused on energy-efficient electronics, delivering power management, analog, logic, and sensing solutions for automotive, industrial, and cloud infrastructure markets.
The MC74HCU04AFR1 belongs to the HCU logic family designed for high-noise-immunity, wide-supply-range digital interfacing - specifically targeting applications where legacy TTL compatibility, low static power, and robust operation across extreme temperatures are essential.
FAQ
What is the maximum operating temperature for MC74HCU04AFR1?
The MC74HCU04AFR1 is rated for continuous operation from –55°C to +125°C across all package types. This specification is validated per JEDEC JESD22-A108 and confirmed in the Recommended Operating Conditions table of the official datasheet. The SOIC-14 variant maintains full electrical performance within this range, including propagation delay and output drive capability.
Does MC74HCU04AFR1 support direct connection to LSTTL outputs?
Yes, MC74HCU04AFR1 inputs are compatible with LSTTL outputs when used with external pullup resistors, as explicitly stated in the datasheet's first paragraph. Its VIH and VIL thresholds (e.g., VIH = 4.8 V min at VCC = 6.0 V) meet LSTTL high-level recognition requirements, and the device is compliant with JEDEC Standard No. 7.0A for this interoperability.
Can MC74HCU04AFR1 be used to build a crystal oscillator?
Yes, MC74HCU04AFR1 is explicitly recommended for crystal oscillator configurations, as shown in Figure 5 of the datasheet. Two inverters from the hex array form a Pierce oscillator with a quartz crystal and load capacitors; the remaining inverters can buffer or invert the output. Stable oscillation is guaranteed from 2.5 V to 6.0 V supply.
What is the typical input leakage current of MC74HCU04AFR1 at 25°C?
The typical input leakage current of MC74HCU04AFR1 is ±0.1 µA at VCC = 6.0 V and TA = 25°C, with a guaranteed maximum of ±1.0 µA over the full temperature range (–55°C to +125°C). This value is specified in the DC Electrical Characteristics table under the Iin parameter and reflects true CMOS gate leakage behavior.
Is MC74HCU04AFR1 pin-compatible with the 74LS04?
Yes, MC74HCU04AFR1 is identical in pinout to the 74LS04 and MC14069UB, as confirmed in the datasheet's opening sentence. All six inverter inputs (A1–A6) and outputs (Y1–Y6), plus VCC (Pin 14) and GND (Pin 7), occupy identical positions - enabling drop-in replacement in existing LS04 layouts without PCB modification.
MC74HCU04AFR1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74HCU
- Package/Case:
- 14-SOIC (0.209", 5.30mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- XNOR (Exclusive NOR)
- 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:
- 0.3V ~ 1.1V
- Input Logic Level - High:
- 1.7V ~ 4.8V
- Max Propagation Delay @ V, Max CL:
- 12ns @ 6V, 50pF
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
MC74HCU04AFR1 FAQ
1.How can I place an order for MC74HCU04AFR1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74HCU04AFR1 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 MC74HCU04AFR1 reliable?
The price and inventory of MC74HCU04AFR1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74HCU04AFR1 is usually 5 days.
3.What payment methods are accepted for MC74HCU04AFR1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74HCU04AFR1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74HCU04AFR1?
MC74HCU04AFR1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74HCU04AFR1 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 MC74HCU04AFR1?
For technical support, including MC74HCU04AFR1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74HCU04AFR1 requirements.
6.How does Aetrix verify that MC74HCU04AFR1 is sourced from the original manufacturer or authorized distributors?
All MC74HCU04AFR1 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 MC74HCU04AFR1 meets industry standards.
7.What is the process for return or replacement of MC74HCU04AFR1?
All MC74HCU04AFR1 units undergo pre-shipment inspection (PSI). If there is an issue with MC74HCU04AFR1, 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 MC74HCU04AFR1 part is unused and in its original packaging.
Return procedure for MC74HCU04AFR1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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