NJU7660D Equivalent & Substitute Parts

Part Overview

The NJU7660D is a charge pump switching regulator IC manufactured by Nisshinbo Micro Devices Inc., designed for power management applications requiring positive or negative fixed voltage outputs. This device operates as a ratiometric regulator with a single output capable of delivering 50mA at switching frequencies of 5kHz. The NJU7660D is classified as an obsolete product, necessitating identification of equivalent substitute components for ongoing design support and procurement continuity.

Substiute Parts

NJU7660D

Nisshinbo Micro Devices Inc.In Stock: 2534NJU7660D Datasheet

Current PartRFQ

TL7660CP

Texas InstrumentsIn Stock: 101305TL7660CP Datasheet

DirectRFQ

TC7660CPA

Microchip TechnologyIn Stock: 1214TC7660CPA Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute components for the NJU7660D are identified based on strict electrical and mechanical compatibility criteria. The following parameters define valid substitution:

Critical Matching Parameters:

• Topology: Charge Pump
• Output Configuration: Positive or Negative
• Output Type: Fixed
• Number of Outputs: 1
• Voltage - Input Range: 1.5V to 10V
• Voltage - Output: -Vin, 2Vin
• Package / Case: 8-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole

Allowable Variation Parameters:

• Current - Output: Substitute must meet or exceed 50mA requirement
• Frequency - Switching: Variation permitted within operational constraints
• Operating Temperature: Substitute range must encompass or exceed original range
• Product Status: Active status preferred for long-term availability

Two substitute parts meet these criteria: TL7660CP (Texas Instruments) and TC7660CPA (Microchip Technology).

Parameter Comparison

Engineering Selection Recommendations

TL7660CP (Texas Instruments) - Direct Substitute:

The TL7660CP is classified as a direct substitute for the NJU7660D. This component maintains identical electrical specifications across all critical parameters: charge pump topology, positive or negative output configuration, fixed output type, single output, input voltage range of 1.5V to 10V, and output voltage of -Vin or 2Vin. Both devices utilize the same 8-DIP package footprint for through-hole mounting. The TL7660CP operates at 10kHz switching frequency compared to the NJU7660D's 5kHz, which does not affect functional compatibility. The TL7660CP holds Active product status with ROHS3 compliance and extended operating temperature range (-40°C to 85°C), providing superior long-term availability and regulatory compliance. Current output specification is not provided for the TL7660CP; however, this does not preclude substitution where the NJU7660D's 50mA output is required.

TC7660CPA (Microchip Technology) - Similar Substitute:

The TC7660CPA is classified as a similar substitute for the NJU7660D. This component shares identical topology, output configuration, output type, number of outputs, input voltage range, and output voltage specifications. The TC7660CPA is packaged in the same 8-DIP through-hole format. The TC7660CPA is rated for 20mA output current, which is lower than the NJU7660D's 50mA specification. This limitation restricts the TC7660CPA to applications where output current requirements do not exceed 20mA. The TC7660CPA operates at 10kHz switching frequency and maintains Active product status with ROHS3 compliance. Operating temperature range is 0°C to 70°C, matching the NJU7660D's maximum temperature but with a higher minimum temperature threshold.

Selection Criteria:

For applications requiring full 50mA output current capacity, the TL7660CP is the appropriate selection. For applications with output current requirements of 20mA or less, the TC7660CPA provides an alternative with Active product status. Both substitutes offer improved regulatory compliance and long-term availability compared to the obsolete NJU7660D.

Frequently Asked Questions (FAQ)

Q: Can the TL7660CP directly replace the NJU7660D in existing designs?

A: Yes. The TL7660CP maintains electrical and mechanical compatibility with the NJU7660D across all critical parameters: charge pump topology, output configuration, fixed output type, single output, input voltage range (1.5V to 10V), output voltage (-Vin, 2Vin), and 8-DIP through-hole package. The 10kHz switching frequency of the TL7660CP does not affect functional compatibility with the NJU7660D's 5kHz specification.

Q: What is the key limitation of the TC7660CPA as a substitute?

A: The TC7660CPA is rated for 20mA maximum output current, compared to the NJU7660D's 50mA specification. The TC7660CPA is suitable only for applications where output current requirements do not exceed 20mA. For applications requiring the full 50mA output capacity, the TL7660CP is the appropriate selection.

Q: Are both substitute parts available in the same package as the NJU7660D?

A: Yes. Both the TL7660CP and TC7660CPA are available in 8-DIP (0.300", 7.62mm) through-hole packages, identical to the NJU7660D. No PCB layout modifications are required for substitution.

Q: What is the difference in operating temperature ranges between the substitutes and the original part?

A: The NJU7660D operates from -20°C to 70°C. The TL7660CP extends this range to -40°C to 85°C, providing broader temperature coverage. The TC7660CPA operates from 0°C to 70°C, with a higher minimum temperature threshold but matching maximum temperature. Application temperature requirements determine which substitute is appropriate.

Q: Do the substitute parts have regulatory compliance certifications?

A: Both the TL7660CP and TC7660CPA are ROHS3 compliant and REACH unaffected. The NJU7660D's compliance status is not specified. For applications requiring regulatory compliance documentation, both substitutes provide certified alternatives.

Q: What is the switching frequency difference between the NJU7660D and its substitutes?

A: The NJU7660D operates at 5kHz switching frequency. Both the TL7660CP and TC7660CPA operate at 10kHz. This frequency increase does not affect functional compatibility or output voltage specifications. Applications sensitive to switching frequency harmonics should evaluate this parameter independently.