TCM680CPA Equivalent & Substitute Parts

Part Overview

The TCM680CPA is a charge pump switching regulator IC from Microchip Technology designed for dual-rail power management applications. This device generates positive and negative output voltages from a single input supply, delivering 10mA per output through a charge pump topology operating at 21kHz switching frequency. The part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements.

Substiute Parts

TCM680CPA

Microchip TechnologyIn Stock: 1407TCM680CPA Datasheet

Current PartRFQ

MAX680CPA+

Analog Devices Inc./Maxim IntegratedIn Stock: 85797MAX680CPA+ Datasheet

MFR RecommendedRFQ

MAX680EPA+

Analog Devices Inc./Maxim IntegratedIn Stock: 100393MAX680EPA+ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the TCM680CPA is determined by the following critical parameters:

• Package compatibility: 8-DIP (0.300", 7.62mm) through-hole mounting
• Functional topology: Charge pump switching regulator
• Output configuration: Dual-rail (positive and negative) outputs
• Output voltage specification: Fixed ±2Vin capability
• Current rating: 10mA per output minimum
• Input voltage range: Minimum 2V to maximum 5.5V support
• Electrical compliance: ROHS3 compliant, RoHS3 certification required

The MAX680CPA+ and MAX680EPA+ from Analog Devices Inc./Maxim Integrated meet these substitution criteria. Both devices share identical package geometry, functional topology, output configuration, and current ratings. The MAX680 series operates at 8kHz switching frequency compared to the TCM680CPA's 21kHz, which represents a functional difference within acceptable design parameters for charge pump applications.

Parameter Comparison

Engineering Selection Recommendations

MAX680EPA+ is the primary substitute for TCM680CPA applications. This device maintains full compatibility across all critical parameters: identical 8-DIP package, dual-rail charge pump topology, 10mA output current, and extended operating temperature range (-40°C ~ 85°C) matching the original specification. The MAX680EPA+ is actively manufactured and ROHS3 compliant, ensuring long-term availability and regulatory compliance.

MAX680CPA+ serves as an alternative substitute with identical electrical and package specifications to the MAX680EPA+, with the exception of operating temperature range (0°C ~ 70°C). This device is suitable for applications where the extended low-temperature performance of the MAX680EPA+ is not required. Both MAX680 variants are actively produced by Analog Devices Inc./Maxim Integrated.

The input voltage maximum specification difference (5.5V for TCM680CPA versus 6V for MAX680 series) does not restrict substitution, as the MAX680 devices accept the full input range of the original part. The switching frequency difference (21kHz versus 8kHz) reflects design optimization in the MAX680 series and does not compromise functional equivalence for dual-rail power generation applications.

Frequently Asked Questions (FAQ)

Q: Can MAX680CPA+ and MAX680EPA+ be used interchangeably with TCM680CPA?

A: Both MAX680 variants are functionally equivalent substitutes. Selection between them depends on operating temperature requirements. The MAX680EPA+ supports -40°C ~ 85°C operation, matching the TCM680CPA's full temperature range. The MAX680CPA+ operates from 0°C ~ 70°C and is suitable for applications within this narrower range.

Q: Are there pinout differences between TCM680CPA and MAX680 series devices?

A: All three devices use identical 8-DIP (0.300", 7.62mm) through-hole packaging. Pinout compatibility must be verified against specific application schematics, as charge pump regulators may have different pin assignments despite package equivalence.

Q: What is the impact of the switching frequency difference?

A: The TCM680CPA operates at 21kHz while MAX680 devices operate at 8kHz. This difference affects output ripple characteristics and EMI profile but does not prevent functional substitution. Applications sensitive to switching frequency must evaluate noise performance independently.

Q: Are MAX680 devices available in the same packaging as TCM680CPA?

A: Yes. Both MAX680CPA+ and MAX680EPA+ are supplied in 8-DIP (0.300", 7.62mm) through-hole packages, identical to the TCM680CPA. Packaging is specified as Tube for both substitute parts.

Q: What is the compliance status of substitute parts?

A: Both MAX680CPA+ and MAX680EPA+ are ROHS3 compliant and REACH unaffected, matching the regulatory compliance of the original TCM680CPA. Both devices are actively manufactured and supported by Analog Devices Inc./Maxim Integrated.