CD74HC86E-NG Equivalent & Substitute Parts

Part Overview

The CD74HC86E-NG is a 4-channel XOR (Exclusive OR) logic gate integrated circuit manufactured by Texas Instruments in a 14-PDIP through-hole package. This component implements exclusive OR logic functions across four independent channels, each with two inputs. The part is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and procurement continuity. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional equivalence with potential package or performance enhancements.

Substiute Parts

CD74HC86E-NG

Texas InstrumentsIn Stock: 969CD74HC86E-NG Datasheet

Current PartRFQ

SN74HCS86BQAR

Texas InstrumentsIn Stock: 1313SN74HCS86BQAR Datasheet

MFR RecommendedRFQ

CD74HC86E

Harris CorporationIn Stock: 2922CD74HC86E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD74HC86E-NG is determined by the following critical parameters:

Functional Equivalence Criteria:

• Logic type must be XOR (Exclusive OR)
• Number of circuits must be 4
• Number of inputs per circuit must be 2
• Voltage supply range must encompass 2V to 6V minimum
• Quiescent current must not exceed 2 µA

Electrical Compatibility Criteria:

• Supply voltage range: 2V to 6V
• Quiescent current: ≤ 2 µA
• Output current capability: minimum 5.2mA per output

Mechanical Compatibility Criteria:

• Package must accommodate 14-pin configuration
• Mounting type determines PCB integration method (through-hole vs. surface mount)

Two substitute relationships are identified:

1. Parametric Equivalent (CD74HC86E by Harris Corporation): Identical electrical specifications and through-hole package format. Direct pin-for-pin replacement without design modification.

2. Functional Substitute with Enhanced Performance (SN74HCS86BQAR by Texas Instruments): Maintains core XOR logic function with 4 channels and 2 inputs per channel. Offers improved propagation delay (12ns vs. 20ns), Schmitt trigger input capability, and active product status. Requires package transition from through-hole to surface mount (14-WQFN).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Through-Hole PCB Assembly):

Select CD74HC86E by Harris Corporation when through-hole mounting is required and obsolete part status is acceptable. This part provides identical electrical performance and package compatibility with the CD74HC86E-NG. Note that this part carries RoHS non-compliant status, which may conflict with procurement or regulatory requirements in certain applications.

For New Designs or PCB Redesign (Surface Mount Assembly):

Select SN74HCS86BQAR when transitioning to surface mount technology or when active product status is required. This part maintains functional equivalence with improved propagation delay performance (12ns vs. 20ns) and Schmitt trigger input capability. The 14-WQFN package requires PCB layout modification and surface mount assembly processes. This part carries active product status and is manufactured by Texas Instruments, ensuring long-term availability and supply chain stability.

Compliance Considerations:

The CD74HC86E-NG is ROHS3 compliant. The Harris CD74HC86E is RoHS non-compliant. The SN74HCS86BQAR carries "Not Applicable" RoHS status. Verify compliance requirements against your application's regulatory framework before final selection.

Frequently Asked Questions (FAQ)

Q: Can CD74HC86E by Harris Corporation be used as a direct replacement for CD74HC86E-NG?

A: Yes. Both parts share identical electrical specifications (voltage supply, quiescent current, propagation delay, output current) and the same 14-DIP through-hole package. Pin configuration and functional behavior are equivalent. However, the Harris part is RoHS non-compliant, which may present regulatory concerns depending on application requirements.

Q: What are the key differences between CD74HC86E-NG and SN74HCS86BQAR?

A: The primary differences are: (1) Package format—CD74HC86E-NG uses 14-DIP through-hole; SN74HCS86BQAR uses 14-WQFN surface mount; (2) Propagation delay—CD74HC86E-NG has 20ns maximum; SN74HCS86BQAR has 12ns maximum; (3) Output current—CD74HC86E-NG provides 5.2mA; SN74HCS86BQAR provides 7.8mA; (4) Input features—SN74HCS86BQAR includes Schmitt trigger inputs; (5) Product status—CD74HC86E-NG is obsolete; SN74HCS86BQAR is active; (6) Operating temperature—CD74HC86E-NG operates -55°C to 125°C; SN74HCS86BQAR operates -40°C to 125°C.

Q: Does SN74HCS86BQAR require PCB redesign?

A: Yes. The SN74HCS86BQAR uses a 14-WQFN surface mount package (3x2.5mm), whereas the CD74HC86E-NG uses a 14-DIP through-hole package. PCB footprint, trace routing, and assembly process must be modified to accommodate surface mount technology.

Q: Are the input logic levels compatible across all three parts?

A: Input logic levels differ between the main part and the substitute. CD74HC86E-NG specifies input low 0.5V to 1.8V and input high 1.5V to 4.2V. SN74HCS86BQAR specifies input low 1V to 3V and input high 1.5V to 4.2V. The Schmitt trigger input on SN74HCS86BQAR provides hysteresis, which may affect circuit behavior in noise-sensitive applications. Verify input signal characteristics against these specifications.

Q: Which substitute should be selected for long-term supply chain stability?

A: SN74HCS86BQAR is recommended for long-term supply chain stability. This part carries active product status from Texas Instruments, ensuring continued manufacturing and availability. Both CD74HC86E-NG and CD74HC86E by Harris are classified as obsolete, which presents procurement risk and potential discontinuation.

Q: Can the SN74HCS86BQAR be used in existing through-hole PCB designs without modification?

A: No. The SN74HCS86BQAR requires surface mount assembly and cannot be directly installed into through-hole PCB designs. PCB redesign is necessary to accommodate the 14-WQFN package footprint and surface mount assembly processes.