ICL7660ESA Equivalent & Substitute Parts

Part Overview

The ICL7660ESA is a charge pump switching regulator IC manufactured by Analog Devices Inc./Maxim Integrated, 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 20mA at a 10kHz switching frequency. The ICL7660ESA is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain compatibility across input voltage range (1.5V to 10V), output configuration, package type (8-SOIC), and switching frequency specifications.

Key Parameters

Parameter	Value
Manufacturer	Analog Devices Inc./Maxim Integrated
Category	Power Management (PMIC)
Topology	Charge Pump
Output Configuration	Positive or Negative
Output Type	Fixed
Number of Outputs	1
Voltage - Input (Min)	1.5V
Voltage - Input (Max)	10V
Voltage - Output	-Vin, nVin, Vin/2
Current - Output	20mA
Frequency - Switching	10kHz
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the ICL7660ESA is determined by the following critical parameters:

Package Compatibility: All substitute parts must use 8-SOIC (0.154", 3.90mm Width) surface mount packaging to ensure PCB layout compatibility
Input Voltage Range: Substitute parts must accept 1.5V to 10V input voltage range
Output Configuration: Substitute parts must support positive or negative fixed voltage output capability
Switching Frequency: Substitute parts must operate at 10kHz switching frequency
Output Current: Substitute parts must deliver minimum 20mA output current
Topology: All substitute parts must use charge pump topology

The following parts meet these substitution criteria: ICL7660ESA+, ICL7660ISA+, TC7660EOA, and LMC7660IM/NOPB. Each maintains electrical and mechanical compatibility with the original ICL7660ESA specification.

Parameter Comparison

Parameter	ICL7660ESA	ICL7660ESA+	ICL7660ISA+	TC7660EOA	LMC7660IM/NOPB
Manufacturer	Analog Devices	Analog Devices	Analog Devices	Microchip Technology	Texas Instruments
Voltage - Input (Min)	1.5V	1.5V	1.5V	1.5V	1.5V
Voltage - Input (Max)	10V	10V	10V	10V	10V
Voltage - Output	-Vin, nVin, Vin/2	-Vin, nVin, Vin/2	-Vin, nVin, Vin/2	-Vin, 2Vin	-Vin
Current - Output	20mA	20mA	20mA	20mA	Not specified
Frequency - Switching	10kHz	10kHz	10kHz	10kHz	10kHz
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-20°C ~ 85°C	-40°C ~ 85°C	Not specified
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

ICL7660ESA+ (Analog Devices Inc./Maxim Integrated): Direct manufacturer variant with active product status and ROHS3 compliance. Maintains identical electrical specifications to the original ICL7660ESA including full output voltage configuration range (-Vin, nVin, Vin/2) and 20mA output current. Recommended for designs requiring full feature parity with the obsolete original part.

ICL7660ISA+ (Analog Devices Inc./Maxim Integrated): Active product with ROHS3 compliance. Electrical specifications match the original except for operating temperature range limited to -20°C ~ 85°C (versus -40°C ~ 85°C). Suitable for applications not requiring extended low-temperature operation below -20°C.

TC7660EOA (Microchip Technology): Active product with ROHS3 compliance. Supports positive or negative output configuration with 20mA output current. Output voltage options differ from the original (-Vin, 2Vin versus -Vin, nVin, Vin/2). Applicable when output voltage requirements align with available options.

LMC7660IM/NOPB (Texas Instruments): Active product with ROHS3 compliance. Output configuration limited to negative fixed voltage (-Vin only). Output current specification not provided. Suitable only for applications requiring negative voltage output without positive or ratiometric output requirements.

Frequently Asked Questions (FAQ)

Q: Can ICL7660ISA+ replace ICL7660ESA in all applications? A: ICL7660ISA+ is electrically compatible for most applications. The operating temperature range differs: ICL7660ISA+ operates from -20°C to 85°C while ICL7660ESA operates from -40°C to 85°C. Use ICL7660ISA+ only if your application does not require operation below -20°C.

Q: What is the key difference between TC7660EOA and ICL7660ESA? A: Both devices operate at 10kHz with 20mA output current in 8-SOIC packaging. The primary difference is output voltage configuration: TC7660EOA provides -Vin and 2Vin outputs, while ICL7660ESA provides -Vin, nVin, and Vin/2 outputs. Verify your circuit requires only the available output voltage options before substitution.

Q: Is LMC7660IM/NOPB suitable as a direct replacement? A: LMC7660IM/NOPB is not a direct replacement. It supports only negative voltage output (-Vin), whereas ICL7660ESA supports positive or negative configurations. Use LMC7660IM/NOPB only if your application requires negative voltage output exclusively.

Q: Are all substitute parts RoHS compliant? A: Yes. All substitute parts (ICL7660ESA+, ICL7660ISA+, TC7660EOA, and LMC7660IM/NOPB) are ROHS3 compliant. The original ICL7660ESA is RoHS non-compliant.

Q: Do all substitute parts use the same 8-SOIC package? A: Yes. All substitute parts use 8-SOIC (0.154", 3.90mm Width) surface mount packaging, ensuring PCB layout compatibility with the original ICL7660ESA.

Q: What is the inventory status of these substitute parts? A: ICL7660ESA+ has 3,400 units in stock, ICL7660ISA+ has 2,000 units, TC7660EOA has 28,039 units, and LMC7660IM/NOPB has 366,623 units available as new original stock.

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