LM361H Equivalent & Substitute Parts

Part Overview

The LM361H is a differential comparator IC with complementary TTL output, manufactured in a TO-100-10 metal can package. This device operates with dual supply voltages ranging from ±5V to ±15V and is designed for precision voltage comparison applications. The main part (Texas Instruments LM361H) carries an obsolete product status, making equivalent substitutes necessary for ongoing production and maintenance applications. Substitute parts maintain identical electrical and mechanical specifications while offering active product status and improved compliance certifications.

Key Parameters

Parameter	Specification
Type	Differential Comparator
Number of Elements	2
Output Type	Complementary, TTL
Voltage - Supply, Single/Dual (±)	±5V ~ 15V
Voltage - Input Offset (Max)	5mV @ 5V
Current - Input Bias (Max)	10µA @ 5V
Current - Quiescent (Max)	5mA, 10mA, 20mA
Propagation Delay (Max)	20ns
Operating Temperature	0°C ~ 70°C
Package / Case	TO-100-10 Metal Can
Mounting Type	Through Hole

Substitute Part Grouping Explanation

Substitution eligibility for the LM361H is determined by strict parametric equivalence across all electrical and mechanical specifications. The following criteria establish valid substitutes:

Core Substitution Parameters:

Comparator type: Differential
Number of elements: 2
Output configuration: Complementary, TTL
Supply voltage range: ±5V ~ 15V
Input offset voltage: 5mV @ 5V maximum
Input bias current: 10µA @ 5V maximum
Quiescent current: 5mA, 10mA, 20mA
Propagation delay: 20ns maximum
Operating temperature range: 0°C ~ 70°C
Package: TO-100-10 Metal Can
Mounting: Through Hole

All identified substitute parts meet these parameters without deviation. Differences in product status, packaging format (Tray vs. Bulk), manufacturer origin, and compliance certifications do not affect electrical or mechanical compatibility.

Parameter Comparison

Part Number	Manufacturer	Product Status	Packaging	Type	Elements	Output Type	Supply Voltage	Input Offset (Max)	Input Bias (Max)	Quiescent Current (Max)	Propagation Delay (Max)	Operating Temp	Package	RoHS Status
LM361H	Texas Instruments	Obsolete	—	Differential	2	Complementary, TTL	±5V ~ 15V	5mV @ 5V	10µA @ 5V	5mA, 10mA, 20mA	20ns	0°C ~ 70°C	TO-100-10 Metal Can	RoHS non-compliant
LM361H/NOPB	Texas Instruments	Active	Tray	Differential	2	Complementary, TTL	±5V ~ 15V	5mV @ 5V	10µA @ 5V	5mA, 10mA, 20mA	20ns	0°C ~ 70°C	TO-100-10 Metal Can	ROHS3 Compliant
LM361H	National Semiconductor	Active	Bulk	Differential	2	Complementary, TTL	±5V ~ 15V	5mV @ 5V	10µA @ 5V	5mA, 10mA, 20mA	20ns	0°C ~ 70°C	TO-100-10 Metal Can	RoHS non-compliant

Engineering Selection Recommendations

LM361H/NOPB (Texas Instruments, Active, Tray): This substitute offers active product status with ROHS3 compliance certification. The "/NOPB" suffix indicates lead-free manufacturing and halogen-free packaging, meeting modern environmental standards. Tray packaging is suitable for automated assembly processes. This part is the preferred substitute for new designs and production environments requiring RoHS compliance.

LM361H (National Semiconductor, Active, Bulk): This substitute maintains active product status with identical electrical specifications. Bulk packaging is appropriate for manual assembly or lower-volume applications. REACH Affected status indicates regulatory tracking requirements. This part is suitable for legacy system maintenance where RoHS compliance is not mandated.

LM361H (Texas Instruments, Obsolete): The original part carries obsolete status, indicating discontinued production and limited availability. Transition to an active substitute is necessary for sustained supply chain reliability.

Frequently Asked Questions (FAQ)

Q: Can LM361H/NOPB replace the obsolete LM361H in existing designs? A: Yes. The LM361H/NOPB is a direct parametric equivalent with identical electrical and mechanical specifications. The "/NOPB" designation indicates lead-free and halogen-free construction, which does not affect circuit performance or pin compatibility.

Q: What is the difference between Tray and Bulk packaging? A: Tray packaging is designed for automated pick-and-place assembly equipment, while Bulk packaging is used for manual handling or lower-volume applications. Both formats contain the same TO-100-10 metal can component with identical electrical performance.

Q: Does RoHS compliance affect circuit compatibility? A: No. RoHS compliance relates to material composition and environmental standards, not electrical function. ROHS3-compliant parts (LM361H/NOPB) perform identically to non-compliant versions in circuit applications.

Q: Are National Semiconductor and Texas Instruments versions interchangeable? A: Yes. Both manufacturers produce LM361H devices with identical electrical and mechanical specifications. Differences in compliance certifications and packaging do not affect functional compatibility.

Q: Which substitute should be selected for new production? A: LM361H/NOPB (Texas Instruments, Tray) is recommended for new production due to active product status, ROHS3 compliance, and automated assembly compatibility.

Q: Can these parts be used in ±5V, ±12V, and ±15V supply configurations? A: Yes. All listed parts operate across the full supply voltage range of ±5V to ±15V, supporting multiple system voltage standards.

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