NJU7102AM# Equivalent & Substitute Parts

Part Overview

The NJU7102AM# is a dual-channel general-purpose comparator manufactured by Nisshinbo Micro Devices Inc., featuring CMOS push-pull TTL output architecture in an 8-DMP surface-mount package. This linear integrated circuit operates across a 3V to 14V supply range with a maximum input offset voltage of 12mV at 5V and typical output current of 20mA.

The NJU7102AM# is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this comparator topology.

Key Parameters

Parameter	Value
Manufacturer	Nisshinbo Micro Devices Inc.
Category	Linear
Type	General Purpose Comparator
Number of Elements	2
Output Type	CMOS, Push-Pull, TTL
Voltage Supply Range	3V ~ 14V
Input Offset Voltage (Max)	12mV @ 5V
Input Bias Current (Max)	1pA @ 5.5V
Output Current (Typ)	20mA
CMRR (Typ)	82dB
Propagation Delay (Max)	3µs
Operating Temperature	0°C ~ 70°C
Package	8-SOIC (0.209", 5.30mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the NJU7102AM# is determined by the following critical parameters:

Primary Compatibility Criteria:

Dual-channel (2 elements) general-purpose comparator architecture
CMOS push-pull TTL output configuration
8-pin surface-mount package (8-SOIC or equivalent footprint)
Supply voltage range encompassing 3V to 14V operation
Output current capability of 20mA minimum
Operating temperature range including 0°C to 70°C

Substitution Logic: Parts are grouped as direct substitutes when they maintain identical output topology (CMOS push-pull TTL), preserve dual-channel functionality, and operate within the specified supply voltage window. Package variants (8-SOIC, 8-SO, 8-TSSOP) are considered compatible when physical footprint and pin assignments align with PCB layout requirements.

The following substitute parts meet these criteria:

TLC3702CPSR (Texas Instruments): Identical output type, matching supply range 3V ~ 16V, 8-SO package
TLC3702IDR (Texas Instruments): Identical output type, extended supply range 3V ~ 16V, 8-SOIC package, active product status
TLC3702IPWR (Texas Instruments): Identical output type, extended supply range 3V ~ 16V, 8-TSSOP package, active product status
TLC3702QPWRQ1 (Texas Instruments): Identical output type, automotive-grade variant, 8-TSSOP package, active product status
LM393APSR (Texas Instruments): Dual-channel comparator, different output type (open-collector), extended supply range 2V ~ 36V, 8-SO package

Parameter Comparison

Parameter	NJU7102AM#	TLC3702CPSR	TLC3702IDR	TLC3702IPWR	TLC3702QPWRQ1	LM393APSR
Manufacturer	Nisshinbo	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Number of Elements	2	2	2	2	2	2
Output Type	CMOS, Push-Pull, TTL	CMOS, Push-Pull, TTL	CMOS, Push-Pull, TTL	CMOS, Push-Pull, TTL	CMOS, Push-Pull, TTL	Open-Collector, Rail-to-Rail
Supply Voltage Range	3V ~ 14V	3V ~ 16V	3V ~ 16V	3V ~ 16V	4V ~ 16V	2V ~ 36V, ±1V ~ 18V
Input Offset Voltage (Max)	12mV @ 5V	5mV @ 10V	5mV @ 10V	5mV @ 10V	5mV @ 10V	2mV @ 30V
Input Bias Current (Max)	1pA @ 5.5V	5pA @ 5V	5pA @ 5V	5pA @ 5V	5pA @ 5V	0.25µA @ 5V
Output Current (Typ)	20mA	20mA	20mA	20mA	20mA	20mA
Quiescent Current (Max)	—	50µA	65µA	65µA	40µA	2.5mA
CMRR (Typ)	82dB	84dB	84dB	84dB	84dB	—
Propagation Delay (Max)	3µs	4.5µs	4.5µs	4.5µs	4.5µs	—
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	0°C ~ 70°C
Package / Case	8-SOIC (0.209", 5.30mm)	8-SOIC (0.209", 5.30mm)	8-SOIC (0.154", 3.90mm)	8-TSSOP (0.173", 4.40mm)	8-TSSOP (0.173", 4.40mm)	8-SOIC (0.209", 5.30mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Last Time Buy	Active	Active	Active	Last Time Buy
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitutes (Identical Output Architecture):

The TLC3702 series from Texas Instruments represents the most direct functional replacement for the NJU7102AM#. All TLC3702 variants maintain CMOS push-pull TTL output topology, dual-channel configuration, and compatible supply voltage operation. Selection among TLC3702 variants depends on package requirements and product lifecycle status:

TLC3702IDR is recommended for new designs requiring active product status and extended operating temperature range (-40°C to 85°C). The 8-SOIC package maintains footprint compatibility with the original NJU7102AM#.
TLC3702IPWR offers identical electrical specifications in an 8-TSSOP package for space-constrained applications.
TLC3702QPWRQ1 is specified for automotive applications with AEC-Q100 qualification and extended temperature range (-40°C to 125°C).
TLC3702CPSR provides last-time-buy availability with identical electrical performance in 8-SO packaging.

All TLC3702 variants carry ROHS3 compliance and MSL-1 moisture sensitivity ratings, ensuring regulatory alignment and handling compatibility.

Secondary Substitute (Alternative Output Architecture):

The LM393APSR represents a functional alternative when open-collector output topology is acceptable for the application circuit. This part offers extended supply voltage range (2V to 36V) and superior input offset voltage specification (2mV at 30V). However, the open-collector output requires external pull-up resistors and differs fundamentally from the push-pull TTL output of the NJU7102AM#. Selection of LM393APSR is appropriate only when circuit design accommodates open-collector operation.

Product Lifecycle Considerations:

The NJU7102AM# obsolescence status necessitates immediate substitution planning. TLC3702IDR and TLC3702IPWR maintain active product status with established long-term availability. TLC3702CPSR and LM393APSR carry last-time-buy designations, indicating limited future availability windows.

Frequently Asked Questions (FAQ)

Q: Can TLC3702 series parts directly replace NJU7102AM# without circuit modification?

A: TLC3702IDR, TLC3702IPWR, TLC3702CPSR, and TLC3702QPWRQ1 maintain identical CMOS push-pull TTL output architecture and dual-channel configuration. Direct substitution is possible when package footprint compatibility is verified. The 8-SOIC package variant (TLC3702IDR) provides pin-for-pin compatibility with the original NJU7102AM# 8-SOIC footprint. 8-TSSOP variants (TLC3702IPWR, TLC3702QPWRQ1) require PCB layout modification.

Q: What is the difference between TLC3702 package variants?

A: All TLC3702 variants share identical electrical specifications but differ in physical packaging. TLC3702CPSR uses 8-SO (0.209" width), TLC3702IDR uses 8-SOIC (0.154" width), and TLC3702IPWR/TLC3702QPWRQ1 use 8-TSSOP (0.173" width). Package selection depends on PCB layout constraints and available board space. Pin assignments remain consistent across all variants.

Q: Why does LM393APSR have different output specifications?

A: The LM393APSR employs open-collector output architecture rather than CMOS push-pull TTL. Open-collector outputs require external pull-up resistors to establish high-level voltage. This topology provides different electrical characteristics, including rail-to-rail capability and extended supply voltage range. LM393APSR substitution requires circuit redesign to accommodate open-collector operation.

Q: What are the temperature range implications for substitute selection?

A: The NJU7102AM# operates 0°C to 70°C. TLC3702IDR and TLC3702IPWR extend this to -40°C to 85°C, suitable for industrial applications. TLC3702QPWRQ1 extends further to -40°C to 125°C for automotive environments. TLC3702CPSR and LM393APSR maintain 0°C to 70°C operation. Temperature range selection depends on end-application environmental requirements.

Q: Are all substitute parts RoHS compliant?

A: All TLC3702 variants and LM393APSR carry ROHS3 compliance certification. The NJU7102AM# RoHS status is not specified in available documentation. Substitution with any listed alternative ensures regulatory compliance for RoHS-restricted applications.

Q: What is the significance of MSL ratings for these comparators?

A: MSL (Moisture Sensitivity Level) ratings indicate moisture absorption risk during storage and handling. NJU7102AM#, TLC3702 variants (except QPWRQ1), and LM393APSR carry MSL-1 (unlimited shelf life). TLC3702QPWRQ1 carries MSL-3 (168-hour floor life after moisture exposure), requiring controlled handling procedures. MSL-1 parts offer superior storage flexibility.

Q: Can TLC3702QPWRQ1 be used in non-automotive applications?

A: TLC3702QPWRQ1 is automotive-qualified with AEC-Q100 certification and extended temperature range. It functions identically to other TLC3702 variants in non-automotive circuits. Selection of QPWRQ1 for non-automotive applications is acceptable but may represent unnecessary cost premium compared to standard TLC3702IDR or TLC3702IPWR.

Q: What propagation delay differences exist between NJU7102AM# and substitutes?

A: NJU7102AM# specifies 3µs maximum propagation delay. All TLC3702 variants specify 4.5µs maximum delay. This 1.5µs difference is negligible in most general-purpose comparator applications but may impact high-speed signal processing circuits. LM393APSR propagation delay is not specified. Timing-critical applications require detailed circuit analysis.

Q: Are there inventory considerations for substitute selection?

A: TLC3702IDR maintains highest inventory (37,200 pcs), followed by TLC3702IPWR (35,200 pcs) and TLC3702QPWRQ1 (51,503 pcs). TLC3702CPSR (15,531 pcs) and LM393APSR (1,530 pcs) have lower availability. For volume production, TLC3702IDR or TLC3702IPWR provide superior supply chain security.

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