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onsemi MC74HC7266AFR1
- Part No.:
- MC74HC7266AFR1
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
MC74HC7266AFR1.pdf
- Description:
- IC GATE XNOR 4CH 2-INP 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MC74HC7266AFR1 from ON Semiconductor (formerly Motorola) is a quad 2-input exclusive-NOR (XNOR) gate IC in SOIC-14 package, operating from 2 V to 6 V, delivering 10 LSTTL load drive capability and featuring low input current (1 µA), high noise immunity, and JEDEC Std. No. 7A compliance. It serves as a logic-level signal combiner in biphase-level (Manchester) encoding circuits for data-clock embedding.
For engineers reviewing the MC74HC7266AFR1 datasheet, pinout, applications, or equivalent options, key selection considerations include supply voltage range (2–6 V), propagation delay at 6 V (17 ns), output drive strength (±25 mA), input leakage (±1.0 µA at 125°C), and compatibility with CMOS/NMOS/TTL interfaces without level-shifting.
Technical Context
The MC74HC7266AFR1 implements four independent XNOR gates (Y = A ⊕ B) using high-performance silicon-gate CMOS technology. Each gate features standard CMOS push-pull outputs - not open-drain - enabling direct interfacing to TTL, NMOS, and CMOS loads without pull-up resistors.
Input thresholds are rail-relative (VIH ≥ 70% VCC, VIL ≤ 30% VCC), ensuring robust noise margin across the full 2–6 V supply range. The device supports operation from –55°C to +125°C and meets JEDEC Standard No. 7A for high-speed CMOS logic interoperability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 6.0 V - Enables single-supply operation across battery-powered (3.3 V), industrial (5 V), and mixed-voltage systems. |
| Propagation Delay (VCC = 6 V) | 17 ns max - Supports >20 MHz toggle rates in synchronous logic paths with predictable timing margins. |
| Output Drive Current | ±25 mA per pin - Sufficient to drive 10 LSTTL loads directly, eliminating need for buffer stages in fanout-critical designs. |
| Input Leakage Current | ±1.0 µA max at 125°C - Ensures stable logic levels in high-temperature environments without unintended switching. |
| Logic Function | Quad 2-input XNOR (Y = AB + A̅B̅) - Provides phase-coherent biphase-level (Manchester) encoding when combined with clock and NRZ-L data inputs. |
| Operating Temperature | –55°C to +125°C - Qualified for automotive under-hood, industrial control, and aerospace applications requiring extended thermal range. |
| Input Capacitance | 10 pF max - Minimizes loading on preceding drivers and preserves signal integrity in high-speed routing. |
Pinout & Package
MC74HC7266AFR1 is housed in a 14-pin SOIC package (case 751A–03), with 1.27 mm pitch, 8.55–8.75 mm length, and 3.80–4.00 mm width. Pin 1 is marked by a beveled corner or dot; pin 7 is GND, pin 14 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 8, 12 | Input A (Gate 1–4) | Active-high logic input; compatible with CMOS outputs and LSTTL (with pull-up). |
| 2, 6, 9, 13 | Input B (Gate 1–4) | Second active-high logic input per gate; differential pair with corresponding A input. |
| 3, 4, 10, 11 | Output Y (Gate 1–4) | Push-pull CMOS output; sinks or sources up to ±25 mA; no external pull-up required. |
| 7 | GND | Ground reference for all inputs, outputs, and internal circuitry; must be low-impedance connection. |
| 14 | VCC | Positive supply rail (2–6 V); requires local 0.1 µF ceramic decoupling adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Standard CMOS Outputs | Eliminates need for external pull-up resistors - reduces BOM count and board space vs. open-drain equivalents like LS266. |
| JEDEC Std. No. 7A Compliance | Guarantees interoperability with industry-standard HC/HCT logic families and simplifies cross-manufacturer sourcing. |
| High Noise Immunity | CMOS input structure provides >40% VCC noise margin, critical for reliable operation in electrically noisy industrial environments. |
| Biphase-Level Encoding Support | Exact logic function (XNOR) and timing performance enable direct implementation of Manchester encoders per Figure 3/4 in datasheet. |
| Wide Operating Temperature | –55°C to +125°C rating allows use in under-hood automotive ECUs and outdoor telecom infrastructure without derating. |
Applications
| Manchester Encoder | Data Clock Embedding |
|---|---|
Use Scenario: Converting NRZ-L serial data and system clock into biphase-level (Manchester) format for RF transmission or magnetic stripe encoding. IC Role / Device Role / Timing Role: Performs real-time XNOR logic between NRZ-L data and clock to generate mid-bit transitions encoding both data and timing. Use Value: Eliminates separate clock line and simplifies receiver synchronization - enabled by guaranteed 17 ns propagation delay at 6 V and phase-coherent output. | Use Scenario: Generating self-clocking digital signals in isolated communication links where separate clock distribution is impractical. IC Role / Device Role / Timing Role: Acts as the core logic element in Manchester encoder circuits, ensuring deterministic transition placement per bit interval. Use Value: Achieves zero-jitter encoding due to matched tPLH/tPHL (≤19 ns skew at 125°C), preserving data integrity over long cable runs. |
| Industrial Logic Interface | Legacy System Integration |
Use Scenario: Level-translating and buffering signals between 3.3 V microcontrollers and 5 V PLC I/O modules. IC Role / Device Role / Timing Role: Quad gate provides four independent logic channels with rail-to-rail input compatibility and 10 LSTTL drive strength. Use Value: Operates reliably across 2–6 V supply range - supports mixed-voltage backplanes without discrete level shifters. | Use Scenario: Replacing obsolete 74LS266 in legacy test equipment requiring pin-compatible HC-series upgrade. IC Role / Device Role / Timing Role: Drop-in replacement for LS266 with identical pinout and enhanced CMOS drive/output characteristics. Use Value: Reduces power consumption (ICC < 40 µA at 125°C) while maintaining full backward compatibility with existing PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar XNOR gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC7266N | Dual-in-line (PDIP-14) package; same electrical specs but larger footprint and higher thermal resistance. | Suitable for prototyping or through-hole assembly; not recommended for space-constrained or high-density PCBs. | Select when manual soldering or breadboard evaluation is required; avoid for production SOIC-based designs. |
| 74VHC7266M | Higher speed (tPD = 9.5 ns @ 5 V), lower ICC (< 2 µA), but narrower VCC range (2–5.5 V) and reduced 125°C drive capability. | Better for high-frequency clock domains (>50 MHz) but less tolerant of 6 V industrial rails or extended temperature stress. | Prefer for portable, battery-powered systems prioritizing speed and quiescent power; verify 6 V operation is unnecessary. |
Compared with SN74HC7266N and 74VHC7266M, MC74HC7266AFR1 offers optimal balance of SOIC-14 compactness, full 2–6 V operation, and guaranteed 125°C performance - making it the preferred choice for industrial-grade embedded controllers and automotive body electronics.
Availability
MC74HC7266AFR1 is available at Aetrix Electronics and suitable for industrial automation, automotive body control modules, and legacy system upgrades requiring stable component supply, long-term lifecycle support, and guaranteed SOIC-14 packaging.
Supply support for MC74HC7266AFR1 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
ON Semiconductor is a global semiconductor supplier delivering energy-efficient, high-performance silicon solutions for automotive, industrial, cloud computing, and IoT applications.
The MC74HC7266AFR1 belongs to the HC74 family of high-speed CMOS logic devices, designed specifically for robust, low-power, pin-compatible replacements of legacy TTL logic in mission-critical embedded systems.
FAQ
What logic function does the MC74HC7266AFR1 implement?
The MC74HC7266AFR1 implements four independent 2-input exclusive-NOR (XNOR) gates, where each output Y equals AB + A̅B̅. This function is explicitly confirmed in the logic diagram, truth table, and application information section of the Motorola DL129 datasheet. The MC74HC7266AFR1 is used in biphase-level (Manchester) encoding circuits where precise XNOR behavior between data and clock signals is required.
Is the MC74HC7266AFR1 pin-compatible with the 74LS266?
Yes, the MC74HC7266AFR1 is pin-compatible with the 74LS266, as stated in the Motorola datasheet: "The MC74HC7266A is identical in pinout to the LS266 and the HC266." This allows direct replacement in existing designs without PCB modification. However, the MC74HC7266AFR1 uses standard CMOS outputs instead of open-drain, so pull-up resistors used with LS266 are unnecessary - simplifying the schematic and reducing component count.
What is the maximum operating temperature for the MC74HC7266AFR1?
The MC74HC7266AFR1 is rated for operation from –55°C to +125°C across all package types, including the SOIC-14 (D suffix) variant. This specification is explicitly defined in the "RECOMMENDED OPERATING CONDITIONS" table of the Motorola DL129 datasheet. The extended temperature range makes the MC74HC7266AFR1 suitable for under-hood automotive applications and industrial control environments where thermal stress is significant.
Does the MC74HC7266AFR1 require external pull-up resistors on its outputs?
No, the MC74HC7266AFR1 does not require external pull-up resistors because it features standard CMOS push-pull outputs - unlike open-drain variants such as the LS266. The datasheet explicitly states: "The HC7266 has standard CMOS outputs instead of open–drain outputs." Each output can actively drive high or low with ±25 mA capability, enabling direct interface to TTL, NMOS, and CMOS loads without additional components.
What supply voltage range is supported by the MC74HC7266AFR1?
The MC74HC7266AFR1 supports a DC supply voltage range of 2.0 V to 6.0 V, as specified in both the "RECOMMENDED OPERATING CONDITIONS" and "MAXIMUM RATINGS" sections of the Motorola DL129 datasheet. Operation outside this range - especially above 6.0 V - risks permanent damage. The wide range enables flexible deployment in 3.3 V microcontroller systems, 5 V industrial logic, and mixed-voltage backplanes without level translation.
MC74HC7266AFR1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74HC
- 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):
- 2 µA
- Current - Output High, Low:
- 5.2mA, 5.2mA
- Input Logic Level - Low:
- 0.3V ~ 1.2V
- Input Logic Level - High:
- 1.5V ~ 4.2V
- Max Propagation Delay @ V, Max CL:
- 20ns @ 6V, 50pF
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
MC74HC7266AFR1 FAQ
1.How can I place an order for MC74HC7266AFR1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74HC7266AFR1 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 MC74HC7266AFR1 reliable?
The price and inventory of MC74HC7266AFR1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74HC7266AFR1 is usually 5 days.
3.What payment methods are accepted for MC74HC7266AFR1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74HC7266AFR1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74HC7266AFR1?
MC74HC7266AFR1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74HC7266AFR1 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 MC74HC7266AFR1?
For technical support, including MC74HC7266AFR1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74HC7266AFR1 requirements.
6.How does Aetrix verify that MC74HC7266AFR1 is sourced from the original manufacturer or authorized distributors?
All MC74HC7266AFR1 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 MC74HC7266AFR1 meets industry standards.
7.What is the process for return or replacement of MC74HC7266AFR1?
All MC74HC7266AFR1 units undergo pre-shipment inspection (PSI). If there is an issue with MC74HC7266AFR1, 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 MC74HC7266AFR1 part is unused and in its original packaging.
Return procedure for MC74HC7266AFR1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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