74AC86SCX XOR Logic IC Equivalent & Substitute Parts

Part Overview

The 74AC86SCX is a 4-channel, 2-input XOR (Exclusive OR) logic integrated circuit manufactured by onsemi in 14-SOIC surface mount packaging. This part is currently active in production with 3,600 units in stock. The 74AC86SCX serves as a standard logic gate component for digital circuit applications requiring exclusive OR functionality across multiple channels.

Substitute parts are necessary when the original part number becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when sourcing from multiple suppliers is needed for supply chain resilience.

Key Parameters

Parameter	Value
Logic Type	XOR (Exclusive OR)
Number of Circuits	4
Number of Inputs	2
Voltage Supply Range	2V ~ 6V
Current - Quiescent (Max)	2 µA
Current - Output High/Low	24mA / 24mA
Input Logic Level - Low	0.9V ~ 1.65V
Input Logic Level - High	2.1V ~ 3.85V
Max Propagation Delay @ 5V, 50pF	8.5ns
Operating Temperature	-40°C ~ 85°C
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 74AC86SCX are classified based on electrical parameter compatibility and packaging format. The primary substitution criteria are:

Electrical Compatibility Parameters:

Logic type: XOR (Exclusive OR)
Number of circuits: 4 channels
Number of inputs: 2 inputs per channel
Supply voltage range overlap
Quiescent current specifications
Output current drive capability
Propagation delay performance
Operating temperature range

Packaging Compatibility:

14-SOIC package footprint (0.154" width standard)
Surface mount mounting type
Packaging format (Tape & Reel, Cut Tape, or Tube)

Parts are grouped into three categories:

Direct Substitutes (Identical Electrical & Package Parameters): Parts with matching voltage supply, quiescent current, propagation delay, and temperature range in 14-SOIC packaging.

Similar Substitutes (Matching Electrical Parameters, Different Packaging Format): Parts with identical electrical specifications but alternative packaging formats (Tube instead of Tape & Reel).

Parametric Equivalents (Extended Electrical Specifications): Parts with broader voltage ranges, lower quiescent current, or extended temperature ranges that encompass the original part's operating window.

Parameter Comparison

Part Number	Manufacturer	Voltage Supply	Quiescent Current (Max)	Propagation Delay @ 5V, 50pF	Operating Temperature	Package	Packaging Format	Product Status
74AC86SCX	onsemi	2V ~ 6V	2 µA	8.5ns	-40°C ~ 85°C	14-SOIC (0.154")	Tape & Reel	Active
MC74AC86DR2G	onsemi	2V ~ 6V	4 µA	8.5ns	-40°C ~ 85°C	14-SOIC (0.154")	Tape & Reel	Active
MC74AC86DG	onsemi	2V ~ 6V	4 µA	8.5ns	-40°C ~ 85°C	14-SOIC (0.154")	Tube	Active
CD74AC86M96	Texas Instruments	1.5V ~ 5.5V	4 µA	10.8ns	-55°C ~ 125°C	14-SOIC (0.154")	Cut Tape & Digi-Reel	Active
SN74AC86D	Texas Instruments	2V ~ 6V	2 µA	8.5ns	-40°C ~ 85°C	14-SOIC (0.154")	Tube	Discontinued at DiGi Electronics
CD74AC86M	Harris Corporation	1.5V ~ 5.5V	4 µA	10.8ns	-55°C ~ 125°C	14-SOIC (0.154")	Tube	Obsolete
SN74AC86NSR	Texas Instruments	2V ~ 6V	2 µA	8.5ns	-40°C ~ 85°C	14-SO (0.209")	Tape & Reel	Active
SN74AC86DR	Texas Instruments	2V ~ 6V	2 µA	8.5ns	-40°C ~ 85°C	14-SOIC (0.154")	Cut Tape & Digi-Reel	Active

Engineering Selection Recommendations

Primary Recommendation - Direct Substitutes:

MC74AC86DR2G and SN74AC86DR are the preferred direct substitutes for 74AC86SCX. Both parts maintain identical electrical specifications (2V ~ 6V supply, 8.5ns propagation delay, -40°C ~ 85°C operating range) and 14-SOIC (0.154") package footprint. MC74AC86DR2G is available in Tape & Reel format matching the original packaging, while SN74AC86DR is supplied in Cut Tape & Digi-Reel format. Both manufacturers (onsemi and Texas Instruments) provide ROHS3 compliance and MSL 1 ratings.

Secondary Recommendation - Extended Temperature Range:

CD74AC86M96 (Texas Instruments) provides extended operating temperature range (-55°C ~ 125°C) and broader supply voltage tolerance (1.5V ~ 5.5V), making it suitable for applications requiring wider environmental specifications. Propagation delay increases to 10.8ns at 5V, which may impact timing-critical circuits. This part is supplied in Cut Tape & Digi-Reel format.

Packaging Format Alternatives:

MC74AC86DG (onsemi) and SN74AC86D (Texas Instruments) offer identical electrical performance to the original part but in Tube packaging format. These are suitable when manufacturing processes require tube-packaged components. Note that SN74AC86D is discontinued at DiGi Electronics and should not be selected for new designs requiring long-term availability.

Parts to Avoid:

CD74AC86M (Harris Corporation) is obsolete and should not be used for new designs. SN74AC86D, while electrically compatible, is discontinued and presents supply chain risk.

Frequently Asked Questions (FAQ)

Q: Can MC74AC86DR2G replace 74AC86SCX directly?

A: Yes. MC74AC86DR2G is a direct electrical substitute with identical supply voltage (2V ~ 6V), quiescent current (2 µA for 74AC86SCX, 4 µA for MC74AC86DR2G—within acceptable tolerance), propagation delay (8.5ns), and operating temperature range (-40°C ~ 85°C). Both use 14-SOIC (0.154") packaging. The primary difference is packaging format: MC74AC86DR2G is supplied in Tape & Reel while 74AC86SCX is also Tape & Reel, making this a seamless substitution.

Q: What is the difference between 14-SOIC (0.154") and 14-SO (0.209")?

A: These are different package widths for the same 14-pin SOIC footprint. The 14-SOIC (0.154") is narrower than the 14-SO (0.209"). While both fit the same pin pitch, the different body widths mean they cannot be used interchangeably on the same PCB without layout modification. SN74AC86NSR uses the wider 14-SO (0.209") package and requires PCB redesign if substituting for 14-SOIC (0.154") parts.

Q: Is CD74AC86M96 suitable for high-temperature applications?

A: CD74AC86M96 supports operating temperatures from -55°C to 125°C, compared to 74AC86SCX's -40°C to 85°C range. This extended range makes it suitable for industrial and automotive applications requiring wider temperature tolerance. However, propagation delay increases to 10.8ns at 5V (versus 8.5ns for 74AC86SCX), which may affect timing-sensitive circuits. Verify timing requirements before substitution.

Q: Why does MC74AC86DR2G show 4 µA quiescent current while 74AC86SCX shows 2 µA?

A: Both parts are from the 74AC86 logic family and function identically. The quiescent current difference (2 µA vs. 4 µA) falls within normal manufacturing variation for this device class and does not affect functional compatibility. Both values are well below typical circuit power budgets for logic applications.

Q: Can I use SN74AC86D as a substitute?

A: SN74AC86D is electrically compatible with 74AC86SCX (identical voltage, current, propagation delay, and temperature specifications). However, SN74AC86D is discontinued at DiGi Electronics and presents supply chain risk. For new designs, use MC74AC86DR2G or SN74AC86DR instead, both of which are active products with confirmed availability.

Q: What is the difference between Tape & Reel, Cut Tape, and Tube packaging?

A: These are manufacturing and shipping formats that do not affect component function. Tape & Reel and Cut Tape & Digi-Reel are automated assembly formats suitable for high-volume production. Tube packaging is used for lower-volume or manual assembly processes. Select based on your manufacturing process requirements, not electrical performance.

Q: Are all substitute parts RoHS3 compliant?

A: All active substitute parts listed (MC74AC86DR2G, MC74AC86DG, CD74AC86M96, SN74AC86D, and SN74AC86DR) are ROHS3 compliant. CD74AC86M (Harris Corporation, obsolete) is RoHS non-compliant and should not be used. Verify RoHS compliance status for any parts sourced from alternative suppliers.

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