NJU7301D Equivalent & Substitute Parts

Part Overview

The NJU7301D is a 4-circuit IC switch manufactured by Nisshinbo Micro Devices Inc., configured as a SPST-NO (Single Pole Single Throw - Normally Open) multiplexer/demultiplexer with 1:1 circuit topology. This component operates with dual supply voltage (±15V) and features 200Ohm on-state resistance across all four channels. The device is classified as Last Time Buy, indicating discontinued production status. Equivalent and substitute parts are necessary to ensure design continuity and long-term component availability for applications requiring SPST switch functionality in 16-DIP packaging.

Key Parameters

Parameter	Value	Unit
Manufacturer Part Number	NJU7301D	—
Manufacturer	Nisshinbo Micro Devices Inc.	—
Category	Interface	—
Switch Circuit Type	SPST - NO	—
Number of Circuits	4	—
Multiplexer/Demultiplexer Ratio	1:1	—
On-State Resistance (Max)	200	Ohm
Voltage - Supply, Dual (V±)	±15	V
Switch Time - Turn On (Ton)	600	ns
Switch Time - Turn Off (Toff)	450	ns
Charge Injection	20	pC
Channel Capacitance - Off State (CS(off), CD(off))	5, 5	pF
Current - Leakage (IS(off)) (Max)	100	nA
Crosstalk	-90	dB @ 100kHz
Operating Temperature Range	0 to 70	°C
Package / Case	16-DIP (0.300", 7.62mm)	—
Mounting Type	Through Hole	—
RoHS Status	RoHS Compliant	—
Product Status	Last Time Buy	—

Substitute Part Grouping Explanation

Substitution of the NJU7301D requires matching or exceeding the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Package Format: 16-DIP (0.300", 7.62mm) through-hole mounting
Circuit Configuration: 4-circuit switch with 1:1 multiplexer/demultiplexer topology
Supply Voltage Compatibility: Dual supply operation (±15V nominal or compatible range)
On-State Resistance: Maximum 200Ohm or lower (lower resistance provides improved performance)
Switch Timing: Ton and Toff specifications of 600ns and 450ns or faster
Leakage Current: Maximum 100nA or lower
Crosstalk Performance: -90dB @ 100kHz or better

Substitution Logic: Parts are grouped into two categories based on switch circuit type:

Direct Substitutes (SPST-NO): Parts with identical SPST-NO configuration maintain functional equivalence with the NJU7301D.
Functional Equivalents (SPST-NC or SPST-NO/NC): Parts with SPST-NC (Normally Closed) or dual SPST-NO/NC configuration can substitute when circuit design accommodates the alternative switch state logic. These parts typically offer superior electrical performance (lower on-state resistance, faster switching, lower leakage current).

All substitute parts must maintain 16-DIP package compatibility and support the required dual supply voltage range.

Parameter Comparison

Part Number	Manufacturer	Switch Type	Ron (Max) Ohm	V± (V)	Ton/Toff (ns)	IS(off) (Max) nA	Crosstalk dB	Temp Range °C	Product Status
NJU7301D	Nisshinbo	SPST-NO	200	±15	600/450	100	-90 @ 100kHz	0 to 70	Last Time Buy
ADG201AKNZ	Analog Devices	SPST-NC	90	±10 to ±15	300/250	2	-80 @ 100kHz	-40 to 85	Active
ADG201HSJNZ	Analog Devices	SPST-NC	50	±13.5 to ±16.5	75/75	1	-86 @ 100kHz	-40 to 85	Active
ADG201HSKNZ	Analog Devices	SPST-NC	50	±13.5 to ±16.5	50/50	1	-86 @ 100kHz	-40 to 85	Active
ADG441BNZ	Analog Devices	SPST-NC	70	±15	110/60	0.5	-100 @ 1MHz	-40 to 85	Active
ADG513BNZ	Analog Devices	SPST-NO/NC	30	±4.5 to ±5.5	200/120	0.1	-85 @ 1MHz	-40 to 85	Active
ALD4211PCL	Advanced Linear Devices	SPST-NC	135	±1.5 to ±6	130/130	0.1	-90 @ 100kHz	-40 to 85	Active
ALD4213PCL	Advanced Linear Devices	SPST-NO/NC	135	±1.5 to ±6	130/130	0.1	-90 @ 100kHz	-40 to 85	Active
DG201ACJ+	Analog Devices/Maxim	SPST-NC	200	±4.5 to ±18	600/450	5	-90 @ 100kHz	0 to 70	Active
DG201BDJ-E3	Vishay Siliconix	SPST-NC	85	±4.5 to ±22	300/200	0.5	-95 @ 100kHz	-40 to 85	Active
DG201HSDJ-E3	Vishay Siliconix	SPST-NC	50	±7 to ±22	60/50	1	-100 @ 100kHz	-40 to 85	Active

Engineering Selection Recommendations

Primary Recommendation for Direct Functional Replacement:

DG201ACJ+ (Analog Devices/Maxim Integrated) provides the closest electrical match to NJU7301D specifications. Both parts feature identical 200Ohm on-state resistance, matching switch timing (600ns/450ns), and equivalent crosstalk performance (-90dB @ 100kHz). DG201ACJ+ operates across a wider dual supply voltage range (±4.5V to ±18V), ensuring compatibility with ±15V operation. The part maintains Active product status with ROHS3 compliance and unlimited moisture sensitivity rating, providing superior long-term availability compared to the Last Time Buy NJU7301D.

Secondary Recommendations for Performance Enhancement:

When circuit design permits SPST-NC configuration substitution:

DG201BDJ-E3 (Vishay Siliconix): Reduces on-state resistance to 85Ohm while maintaining compatible switch timing. Offers improved crosstalk performance (-95dB @ 100kHz) and extended supply voltage range (±4.5V to ±22V). Active product status with unlimited MSL rating.
ADG201AKNZ (Analog Devices): Provides 90Ohm on-state resistance with faster switching (300ns/250ns). Supports ±10V to ±15V dual supply range. Active product status with superior leakage current specification (2nA maximum).

For Low-Voltage Applications (±5V or Lower):

ADG513BNZ (Analog Devices) offers SPST-NO/NC dual configuration with 30Ohm on-state resistance, optimized for ±4.5V to ±5.5V supply range. Provides fastest switching performance (200ns/120ns typical) and lowest leakage current (100pA maximum). Active product status with unlimited MSL rating.

Compliance Considerations:

All recommended substitute parts maintain RoHS3 compliance and REACH Unaffected status, matching the environmental compliance profile of NJU7301D. All parts are classified as Active products with established supply chains, ensuring component availability for production and long-term support.

Frequently Asked Questions (FAQ)

Q1: Can DG201ACJ+ directly replace NJU7301D without circuit modification?

A: Yes. DG201ACJ+ maintains identical electrical specifications for on-state resistance (200Ohm), switch timing (600ns/450ns), and crosstalk performance (-90dB @ 100kHz). The primary difference is switch circuit type (SPST-NC vs. SPST-NO), which requires verification that your circuit design accommodates normally-closed switch logic. Pin configuration and 16-DIP package format are identical.

Q2: What is the key difference between SPST-NO and SPST-NC configurations?

A: SPST-NO (Normally Open) maintains an open circuit in the off-state and closes when activated. SPST-NC (Normally Closed) maintains a closed circuit in the off-state and opens when activated. Circuit design must accommodate the alternative switch state logic. If your application requires normally-open behavior, SPST-NO parts (NJU7301D, ADG513BNZ) are required. If normally-closed behavior is acceptable, SPST-NC parts offer superior electrical performance.

Q3: Why do substitute parts show lower on-state resistance than NJU7301D?

A: Lower on-state resistance (50Ohm to 135Ohm vs. 200Ohm) represents improved semiconductor technology and manufacturing processes. Lower resistance reduces signal attenuation, power dissipation, and thermal effects. Substitute parts with lower Ron values provide enhanced performance while maintaining backward compatibility with applications designed for 200Ohm maximum resistance.

Q4: Is the operating temperature range difference significant?

A: NJU7301D operates 0°C to 70°C, while most substitute parts operate -40°C to 85°C. If your application requires operation below 0°C or above 70°C, substitute parts provide extended temperature range capability. If your application operates within 0°C to 70°C, both NJU7301D and substitute parts are suitable. Extended temperature range does not negatively impact applications with narrower temperature requirements.

Q5: What does "Last Time Buy" status mean for NJU7301D?

A: Last Time Buy indicates Nisshinbo Micro Devices Inc. has discontinued production of NJU7301D and will not manufacture additional units beyond existing inventory. This status necessitates identifying and qualifying substitute parts for future production requirements. All recommended substitute parts maintain Active product status with established manufacturing and supply chain support.

Q6: Can I use ADG513BNZ in a ±15V application?

A: No. ADG513BNZ is specified for ±4.5V to ±5.5V dual supply operation. Operating this part at ±15V exceeds maximum rated voltage and will cause device failure. For ±15V applications, use parts specified for this voltage range: NJU7301D, DG201ACJ+, ADG201AKNZ, ADG441BNZ, or DG201BDJ-E3.

Q7: What is the significance of charge injection specification?

A: Charge injection (measured in picocoulombs) represents the amount of charge transferred to the signal path when the switch transitions. Lower charge injection reduces signal distortion and noise in precision analog applications. NJU7301D specifies 20pC charge injection. Substitute parts range from 0.2pC to 20pC. Lower values provide improved signal fidelity but are not required for applications tolerating 20pC injection.

Q8: Are all substitute parts available in 16-DIP package?

A: Yes. All recommended substitute parts are available in 16-DIP (0.300", 7.62mm) through-hole package format, ensuring mechanical and electrical compatibility with NJU7301D PCB layouts. No PCB redesign is required for package substitution.

Q9: What does ROHS3 compliance mean compared to RoHS Compliant?

A: RoHS Compliant indicates compliance with the original Restriction of Hazardous Substances directive. ROHS3 indicates compliance with the updated RoHS 3 directive (2011/65/EU as amended by 2015/863/EU), which includes additional restricted substances. ROHS3 compliance is more stringent and provides enhanced environmental protection. Both compliance levels are acceptable for most applications; ROHS3 is preferred for new designs.

Q10: What is Moisture Sensitivity Level (MSL) and why does it matter?

A: MSL indicates the maximum time a component can be stored in ambient conditions (30°C, 60% relative humidity) before moisture absorption requires baking before soldering. NJU7301D specifies MSL 2 (1 Year), meaning it must be baked if stored longer than one year. Most substitute parts specify MSL 1 (Unlimited), requiring no time-based storage restrictions. MSL 1 provides superior handling flexibility and reduced manufacturing risk.

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