NJM78L09UA-TE2 Equivalent & Substitute Parts

Part Overview

The NJM78L09UA-TE2 is a linear voltage regulator IC manufactured by Nisshinbo Micro Devices Inc., classified as a Power Management (PMIC) component. This device provides a fixed positive 9V output at 100mA output current in a surface-mount SOT-89 package. The part is currently in active product status with 2010 units in stock.

Substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required, or when design specifications allow for functionally equivalent alternatives from different manufacturers. The parts listed below maintain electrical compatibility while offering variations in compliance status, thermal performance, and protection features.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	9V
Output Current	100mA
Input Voltage (Max)	30V
Quiescent Current (Iq)	6 mA
Operating Temperature Range	-40°C ~ 85°C
Package / Case	TO-243AA
Supplier Device Package	SOT-89
Mounting Type	Surface Mount
Protection Features	Over Temperature, Short Circuit
PSRR	65dB (120Hz)

Substitute Part Grouping Explanation

Substitution eligibility for the NJM78L09UA-TE2 is determined by the following critical parameters:

Mandatory Matching Parameters:

Output Voltage (Fixed): 9V
Output Current: 100mA
Package / Case: TO-243AA
Mounting Type: Surface Mount
Output Configuration: Positive
Number of Regulators: 1

Allowable Variations:

Input Voltage (Max): 24V to 30V acceptable
Operating Temperature Range: May extend beyond -40°C ~ 85°C
Quiescent Current (Iq): 5.5 mA to 6 mA acceptable
PSRR: 44dB to 65dB acceptable
Protection Features: May include additional protections (Over Current, Reverse Polarity)
RoHS Status: Both compliant and non-compliant versions acceptable
Packaging Format: Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel® acceptable

Parts that meet these criteria are listed below as direct substitutes or parametric equivalents.

Parameter Comparison

Parameter	NJM78L09UA-TE2	NJM78L09UA-TE1	L78L09ABUTR	L78L09ACUTR	UA78L09ACPK	UA78L09ACPKG3
Manufacturer	Nisshinbo Micro Devices Inc.	Nisshinbo Micro Devices Inc.	STMicroelectronics	STMicroelectronics	Texas Instruments	Texas Instruments
Output Voltage	9V	9V	9V	9V	9V	9V
Output Current	100mA	100mA	100mA	100mA	100mA	100mA
Input Voltage (Max)	30V	30V	30V	30V	24V	24V
Quiescent Current (Iq)	6 mA	6 mA	5.5 mA	5.5 mA	Not specified	Not specified
PSRR (120Hz)	65dB	65dB	44dB	44dB	45dB	45dB
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	0°C ~ 125°C	0°C ~ 125°C	0°C ~ 125°C
Package / Case	TO-243AA	TO-243AA	TO-243AA	TO-243AA	TO-243AA	TO-243AA
Supplier Device Package	SOT-89	SOT-89	SOT-89-3	SOT-89-3	SOT-89-3	SOT-89-3
Packaging Format	Tape & Reel (TR)	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Cut Tape (CT) & Digi-Reel®	Cut Tape (CT)	Tape & Reel (TR)
Protection Features	Over Temperature, Short Circuit	Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Reverse Polarity, Short Circuit	Over Current, Over Temperature, Reverse Polarity, Short Circuit
RoHS Status	RoHS non-compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	2 (1 Year)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	2 (1 Year)	2 (1 Year)
Product Status	Active	Active	Active	Active	Last Time Buy	Last Time Buy
Inventory (Pcs)	2010	45300	35300	63490	2447	2302

Engineering Selection Recommendations

Primary Substitute (Parametric Equivalent): NJM78L09UA-TE1 is the direct parametric equivalent from the same manufacturer. This part maintains identical electrical specifications and is available in significantly higher inventory (45300 units). The primary distinction is RoHS compliance status and improved MSL rating (1 vs. 2), making this the preferred choice for new designs and applications requiring RoHS compliance.

Secondary Substitutes (Similar Performance): L78L09ABUTR and L78L09ACUTR from STMicroelectronics are functionally compatible alternatives. Both parts maintain the required 9V output at 100mA with identical package specifications. These parts offer extended operating temperature ranges (-40°C ~ 125°C and 0°C ~ 125°C respectively) and improved protection features including Over Current protection. ROHS3 compliance and unlimited MSL ratings provide advantages for long-term storage and environmentally regulated applications. L78L09ACUTR has higher inventory availability (63490 units).

Alternative Substitutes (Last Time Buy Status): UA78L09ACPK and UA78L09ACPKG3 from Texas Instruments are functionally compatible but carry Last Time Buy product status, indicating these parts are being discontinued. These parts feature the lowest maximum input voltage (24V vs. 30V) and include Reverse Polarity protection. Selection of these parts is appropriate only when existing inventory must be consumed or when the 24V input limit is acceptable for the application.

Compliance Considerations: Applications requiring RoHS compliance should exclude NJM78L09UA-TE2 and select from NJM78L09UA-TE1, L78L09ABUTR, L78L09ACUTR, UA78L09ACPK, or UA78L09ACPKG3. Applications requiring unlimited moisture sensitivity storage should exclude UA78L09ACPK and UA78L09ACPKG3 (MSL 2) and select from alternatives with MSL 1 rating.

Frequently Asked Questions (FAQ)

Q: Can NJM78L09UA-TE1 be used as a direct replacement for NJM78L09UA-TE2?

A: Yes. NJM78L09UA-TE1 is a parametric equivalent with identical electrical specifications, package, and mounting type. The primary differences are RoHS compliance status and moisture sensitivity level. Both parts are manufactured by Nisshinbo Micro Devices Inc. and are pin-compatible.

Q: What is the difference between SOT-89 and SOT-89-3 package designations?

A: Both designations refer to the same physical package (TO-243AA) with three leads. The "-3" suffix in SOT-89-3 explicitly indicates the three-pin configuration. These packages are mechanically and electrically compatible for this application.

Q: Are the STMicroelectronics parts (L78L09ABUTR and L78L09ACUTR) suitable replacements?

A: Yes. Both STMicroelectronics parts maintain the required 9V output at 100mA with identical package specifications. Key differences include lower quiescent current (5.5 mA vs. 6 mA), lower PSRR (44dB vs. 65dB), extended operating temperature ranges, and additional Over Current protection. These parts are suitable for applications where the extended temperature range and additional protection features are beneficial.

Q: Why do UA78L09ACPK and UA78L09ACPKG3 have a lower maximum input voltage (24V vs. 30V)?

A: The Texas Instruments parts are specified with a 24V maximum input voltage, which is lower than the 30V specification of the Nisshinbo and STMicroelectronics alternatives. Applications with input voltages between 24V and 30V must use NJM78L09UA-TE2, NJM78L09UA-TE1, L78L09ABUTR, or L78L09ACUTR.

Q: What does "Last Time Buy" product status mean?

A: Last Time Buy status indicates that the manufacturer is discontinuing the part. UA78L09ACPK and UA78L09ACPKG3 are in this status. Existing inventory is available for purchase, but no future production is planned. New designs should avoid these parts unless existing stock must be consumed.

Q: Which substitute offers the best long-term storage capability?

A: Parts with MSL 1 (Unlimited) rating offer unlimited storage without moisture baking requirements. NJM78L09UA-TE1, L78L09ABUTR, and L78L09ACUTR all carry MSL 1 ratings. Parts with MSL 2 (1 Year) rating, including NJM78L09UA-TE2, UA78L09ACPK, and UA78L09ACPKG3, require moisture baking if stored beyond one year.

Q: Are all substitute parts RoHS compliant?

A: No. NJM78L09UA-TE2 is RoHS non-compliant. NJM78L09UA-TE1, L78L09ABUTR, L78L09ACUTR, UA78L09ACPK, and UA78L09ACPKG3 are all RoHS3 compliant. Applications subject to RoHS regulations must use compliant alternatives.

Q: What additional protection features do the STMicroelectronics and Texas Instruments parts provide?

A: L78L09ABUTR and L78L09ACUTR include Over Current protection in addition to Over Temperature and Short Circuit protection. UA78L09ACPK and UA78L09ACPKG3 include Over Current, Over Temperature, Reverse Polarity, and Short Circuit protection. The Nisshinbo parts (NJM78L09UA-TE2 and NJM78L09UA-TE1) include only Over Temperature and Short Circuit protection.

Q: Can packaging format (Tape & Reel vs. Cut Tape) affect substitution decisions?

A: Packaging format affects handling and assembly processes but does not impact electrical compatibility. NJM78L09UA-TE2 and UA78L09ACPKG3 are supplied in Tape & Reel format. NJM78L09UA-TE1 is also Tape & Reel. L78L09ABUTR, L78L09ACUTR, and UA78L09ACPK are supplied in Cut Tape or Digi-Reel® format. Selection should align with assembly equipment capabilities.

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