NE529K Equivalent & Substitute Parts

Part Overview

The NE529K is a differential comparator IC manufactured by Texas Instruments, housed in a TO-100-10 metal can package with through-hole mounting. This device features 2 differential elements with TTL output, designed for precision voltage comparison applications. The NE529K is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production support. The LM361H/NOPB serves as the manufacturer-recommended substitute, offering enhanced specifications and active product status while maintaining functional and package compatibility.

Substiute Parts

NE529K

Texas InstrumentsIn Stock: 1306NE529K Datasheet

Current PartRFQ

LM361H/NOPB

Texas InstrumentsIn Stock: 1130LM361H/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the NE529K with the LM361H/NOPB is based on the following critical parameters that determine functional and mechanical compatibility:

Functional Parameters:

• Differential comparator architecture with 2 elements
• TTL-compatible output stage
• Identical propagation delay specification (20ns maximum)
• Matching input offset voltage (5mV @ 5V)
• Identical package and pinout (TO-100-10 Metal Can)
• Through-hole mounting compatibility

Electrical Operating Range:

• NE529K: ±4.75V ~ 5.25V supply voltage
• LM361H/NOPB: ±5V ~ 15V supply voltage

The LM361H/NOPB maintains backward compatibility with the NE529K while offering extended supply voltage range and improved quiescent current specifications. Both devices share identical package geometry, pinout, and core functional characteristics required for direct substitution.

Parameter Comparison

Engineering Selection Recommendations

The LM361H/NOPB is the appropriate substitute for the obsolete NE529K based on the following engineering criteria:

Product Status & Availability: The NE529K is obsolete and no longer manufactured. The LM361H/NOPB maintains active production status, ensuring long-term availability and supply chain continuity.

Compliance & Certifications: The LM361H/NOPB is ROHS3 compliant, meeting current environmental and regulatory requirements. Both devices maintain REACH Unaffected status and EAR99 export classification.

Functional Compatibility: Identical package geometry (TO-100-10 Metal Can), pinout, propagation delay (20ns), and input offset voltage (5mV @ 5V) ensure direct functional substitution without circuit redesign.

Electrical Performance: The LM361H/NOPB supports the NE529K's ±5V nominal supply voltage while offering extended range capability (±5V ~ 15V). Improved input bias current (10µA vs. 30µA) and flexible quiescent current options provide enhanced performance characteristics.

Packaging & Mounting: Both devices use identical through-hole TO-100-10 metal can packages, enabling direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the LM361H/NOPB directly replace the NE529K without circuit modifications?

A: Yes. Both devices share identical package geometry, pinout, propagation delay, and input offset voltage specifications. The LM361H/NOPB operates within the NE529K's ±5V nominal supply voltage range and maintains functional compatibility for direct substitution.

Q: What are the key differences between the NE529K and LM361H/NOPB?

A: The primary differences are product status (obsolete vs. active), RoHS compliance (non-compliant vs. ROHS3 compliant), input bias current (30µA vs. 10µA), and supply voltage range (±4.75V ~ 5.25V vs. ±5V ~ 15V). The LM361H/NOPB also offers complementary output capability in addition to TTL output.

Q: Is the TO-100-10 metal can package still available for new designs?

A: The LM361H/NOPB is actively manufactured in the TO-100-10 metal can package with through-hole mounting, ensuring availability for both replacement and new design applications.

Q: Does the LM361H/NOPB meet current environmental regulations?

A: Yes. The LM361H/NOPB is ROHS3 compliant and REACH Unaffected, meeting current environmental and regulatory requirements for electronic components.

Q: What is the input bias current difference, and does it affect circuit design?

A: The LM361H/NOPB has lower input bias current (10µA @ 5V) compared to the NE529K (30µA @ ±5V). This improvement reduces input loading effects and may enhance circuit performance, but does not require circuit redesign for direct substitution.

Q: Are there any supply voltage considerations when substituting?

A: The LM361H/NOPB supports extended supply voltage range (±5V ~ 15V) compared to the NE529K (±4.75V ~ 5.25V). Existing circuits designed for ±5V operation are fully compatible. The extended range provides flexibility for future applications requiring higher supply voltages.