NJM2597V-TE2 Equivalent & Substitute Parts

Part Overview

The NJM2597V-TE2 is an RF Demodulator IC manufactured by Nisshinbo Micro Devices Inc., designed for FM IF demodulation at 455kHz in a 14-LSSOP surface mount package. This component operates across a supply voltage range of 1.6V to 5.5V and is classified as obsolete. Due to its obsolete status and limited availability in new production, equivalent and substitute RF demodulator ICs from active manufacturers are necessary for ongoing system designs and legacy product support.

Key Parameters

Parameter	NJM2597V-TE2
Manufacturer	Nisshinbo Micro Devices Inc.
Function	Demodulator
RF Frequency	455kHz
Voltage - Supply	1.6V ~ 5.5V
Mounting Type	Surface Mount
Package / Case	14-LSSOP (0.173", 4.40mm Width)
Product Status	Obsolete
RoHS Status	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the NJM2597V-TE2 is determined by the following critical parameters: RF frequency range, supply voltage compatibility, demodulator function, and surface mount packaging capability. The original part operates at 455kHz with a wide supply voltage range (1.6V ~ 5.5V), which is characteristic of legacy FM IF demodulator applications.

Substitute parts are grouped into two categories based on operational frequency alignment:

Category 1: Low-Frequency Demodulators (70MHz ~ 400MHz Range) These parts accommodate applications requiring demodulation in the VHF band and are compatible with the original part's low supply voltage requirements.

Category 2: Intermediate-Frequency Demodulators (30MHz ~ 2GHz and Higher) These parts serve applications requiring higher frequency demodulation with fixed supply voltage specifications (typically 4.5V ~ 5.5V or 4.75V ~ 5.25V).

Category 3: Ultra-High-Frequency Demodulators (1.7GHz ~ 6GHz Range) These parts address microwave and cellular band applications with integrated gain and noise figure specifications.

All substitute parts maintain surface mount technology and active product status, ensuring availability and ongoing manufacturer support.

Parameter Comparison

Part Number	Manufacturer	RF Frequency Range	Voltage - Supply	Mounting Type	Package / Case	Product Status	RoHS Status
NJM2597V-TE2	Nisshinbo Micro Devices Inc.	455kHz	1.6V ~ 5.5V	Surface Mount	14-LSSOP (0.173", 4.40mm Width)	Obsolete	RoHS Compliant
LT5502EGN#TRPBF	Analog Devices Inc.	70MHz ~ 400MHz	1.8V ~ 5.25V	Surface Mount	24-SSOP (0.154", 3.90mm Width)	Active	ROHS3 Compliant
MAX2306ETI+	Analog Devices Inc./Maxim Integrated	40MHz ~ 300MHz	2.7V	Surface Mount	28-WFQFN Exposed Pad	Active	ROHS3 Compliant
ADL5387ACPZ-R7	Analog Devices Inc.	30MHz ~ 2GHz	4.75V ~ 5.25V	Surface Mount	24-VFQFN Exposed Pad, CSP	Active	ROHS3 Compliant
LT5517EUF#PBF	Analog Devices Inc.	40MHz ~ 900MHz	4.5V ~ 5.25V	Surface Mount	16-WQFN Exposed Pad	Active	ROHS3 Compliant
AD8333ACPZ-WP	Analog Devices Inc.	0Hz ~ 50MHz	4.5V ~ 6V	Surface Mount	32-WFQFN Exposed Pad, CSP	Active	ROHS3 Compliant
ADL5380ACPZ-R7	Analog Devices Inc.	400MHz ~ 6GHz	4.75V ~ 5.25V	Surface Mount	24-WFQFN Exposed Pad, CSP	Active	ROHS3 Compliant
TRF3710IRGZT	Texas Instruments	1.7GHz ~ 2GHz	4.5V ~ 5.5V	Surface Mount	48-VFQFN Exposed Pad	Active	ROHS3 Compliant
TRF371135IRGZT	Texas Instruments	1.7GHz ~ 6GHz	4.5V ~ 5.5V	Surface Mount	48-VFQFN Exposed Pad	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Legacy Replacement (Lowest Risk): The LT5502EGN#TRPBF offers the closest compatibility profile to the NJM2597V-TE2. It maintains a low supply voltage range (1.8V ~ 5.25V) that overlaps with the original part's specification, operates in the VHF demodulation band, and is housed in a 24-SSOP package suitable for surface mount assembly. This part carries ROHS3 compliance and active product status, ensuring long-term availability.

For Low-Frequency Applications (40MHz ~ 300MHz): The MAX2306ETI+ operates at a fixed 2.7V supply voltage and covers the 40MHz to 300MHz RF frequency range. This part is suitable for applications where the original 455kHz specification can be adapted to intermediate frequency demodulation. Active product status and ROHS3 compliance are confirmed.

For Intermediate-Frequency Applications (30MHz ~ 2GHz): The ADL5387ACPZ-R7 provides demodulation across 30MHz to 2GHz with a 4.75V to 5.25V supply voltage range. This part includes specified gain (3.8dB) and noise figure (16.5dB) parameters, enabling performance prediction in system designs. Active status and ROHS3 compliance are maintained.

For VHF/UHF Applications (40MHz ~ 900MHz): The LT5517EUF#PBF operates across 40MHz to 900MHz with a 4.5V to 5.25V supply voltage range. Specified gain (3.3dB) and noise figure (12.4dB) are provided. This part is available in a compact 16-WQFN package and carries active product status with ROHS3 compliance.

For Wideband Low-Frequency Applications (0Hz ~ 50MHz): The AD8333ACPZ-WP covers DC to 50MHz demodulation with a 4.5V to 6V supply voltage range. This part provides the widest low-frequency coverage and is suitable for baseband and low-IF demodulation applications. Active status and ROHS3 compliance are confirmed.

For Microwave Applications (1.7GHz ~ 6GHz): The TRF371135IRGZT and TRF3710IRGZT from Texas Instruments address high-frequency demodulation requirements. The TRF371135IRGZT covers 1.7GHz to 6GHz with specified gain (45dB) and noise figure (17.5dB). Both parts maintain 4.5V to 5.5V supply voltage compatibility and active product status with ROHS3 compliance.

All substitute parts are manufactured by established semiconductor suppliers (Analog Devices Inc., Maxim Integrated, Texas Instruments) with confirmed active product status, ensuring ongoing technical support and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Why is the NJM2597V-TE2 no longer available? A: The NJM2597V-TE2 is classified as obsolete by its manufacturer, Nisshinbo Micro Devices Inc. Obsolete status indicates that the manufacturer has discontinued production and will not resume manufacturing. Existing inventory is limited, and no new stock will be produced.

Q: What is the primary difference between the original part and the substitute options? A: The NJM2597V-TE2 is optimized for 455kHz FM IF demodulation with a wide supply voltage range (1.6V ~ 5.5V). Substitute parts operate at higher RF frequencies (ranging from 40MHz to 6GHz) and typically require fixed supply voltages (2.7V, 4.5V ~ 5.5V, or 4.75V ~ 5.25V). Selection depends on the target RF frequency of the application.

Q: Can I use a higher-frequency demodulator IC as a direct replacement? A: Direct replacement is not guaranteed. Higher-frequency demodulator ICs are designed for different RF frequency bands and may require circuit redesign, including changes to matching networks, filter components, and PCB layout. The LT5502EGN#TRPBF offers the closest frequency and voltage compatibility for legacy applications.

Q: What does "active product status" mean? A: Active product status indicates that the manufacturer continues to produce the part, provides technical support, and maintains supply chain availability. All substitute parts listed carry active status, ensuring long-term sourcing reliability.

Q: Are all substitute parts RoHS compliant? A: Yes. All substitute parts listed carry either RoHS Compliant or ROHS3 Compliant certification. The original NJM2597V-TE2 is RoHS Compliant. ROHS3 represents the current RoHS 3 directive compliance standard.

Q: What is the significance of the package type difference? A: The original part uses a 14-LSSOP package, while substitutes use 24-SSOP, 16-WQFN, 24-WFQFN, 28-WFQFN, or 48-VFQFN packages. Package differences require PCB redesign, including footprint changes, trace routing modifications, and potential changes to board layer stackup. Smaller packages (16-WQFN) reduce board area, while larger packages (48-VFQFN) may offer improved thermal performance.

Q: What is Moisture Sensitivity Level (MSL)? A: MSL indicates the maximum time a component can be exposed to ambient conditions (typically 30°C, 85% relative humidity) before soldering. MSL 1 (Unlimited) allows indefinite storage without special handling. MSL 3 (168 Hours) requires controlled storage and handling procedures. The original part has MSL 1; most substitutes have MSL 1 or MSL 3.

Q: Which substitute part is best for a 455kHz application? A: The LT5502EGN#TRPBF is the most suitable option for applications originally designed around 455kHz. Although it operates at higher frequencies (70MHz ~ 400MHz), its low supply voltage range (1.8V ~ 5.25V) overlaps with the original specification, and its 24-SSOP package is compatible with standard surface mount assembly processes.

Q: Do I need to change my power supply design? A: This depends on the selected substitute part. The LT5502EGN#TRPBF operates at 1.8V ~ 5.25V, which is compatible with the original 1.6V ~ 5.5V range. Other substitutes require fixed supply voltages (2.7V, 4.5V ~ 5.5V, or 4.75V ~ 5.25V), which may necessitate power supply modifications or voltage regulation adjustments.

Q: What is the difference between ROHS3 and RoHS Compliant? A: RoHS Compliant refers to the original RoHS directive compliance. ROHS3 refers to the current RoHS 3 directive (2015/863/EU), which includes additional restricted substances. Both certifications indicate compliance with hazardous substance restrictions; ROHS3 represents the current regulatory standard.

Q: Can I use multiple substitute parts in the same design? A: No. Each substitute part is selected based on specific RF frequency requirements and supply voltage constraints. Using multiple different demodulator ICs in a single design would require separate circuit implementations and is not recommended for standardized product designs.

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