TCM680EOA Equivalent & Substitute Parts

Part Overview

The TCM680EOA is a charge pump switching regulator IC manufactured by Microchip Technology, designed for positive and negative (dual rail) output applications. This device generates fixed output voltages of -Vin and 2Vin from a 2V to 5.5V input supply, delivering 10mA per output in an 8-SOIC surface mount package. The TCM680EOA is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across input voltage range, output voltage configuration, current delivery capability, and package form factor.

Substiute Parts

TCM680EOA

Microchip TechnologyIn Stock: 1213TCM680EOA Datasheet

Current PartRFQ

MAX680CSA+

Analog Devices Inc./Maxim IntegratedIn Stock: 1987MAX680CSA+ Datasheet

MFR RecommendedRFQ

MAX680CSA+T

Analog Devices Inc./Maxim IntegratedIn Stock: 79292MAX680CSA+T Datasheet

MFR RecommendedRFQ

MAX680ESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 5468MAX680ESA+ Datasheet

MFR RecommendedRFQ

MAX680ESA+T

Analog Devices Inc./Maxim IntegratedIn Stock: 8528MAX680ESA+T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TCM680EOA are qualified based on the following electrical and mechanical parameters:

Critical Compatibility Parameters:

• Output Configuration: Positive and Negative (Dual Rail)
• Output Type: Fixed
• Number of Outputs: 2
• Voltage - Input Range: Minimum 2V, Maximum ≥5.5V
• Voltage - Output: ±2Vin capability
• Current - Output: 10mA minimum
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount
• Topology: Charge Pump

The MAX680 series from Analog Devices Inc./Maxim Integrated meets all critical electrical parameters. All substitute parts operate with identical output voltage ratios (±2Vin), deliver 10mA output current, and are packaged in the same 8-SOIC form factor. Differences in switching frequency (8kHz vs. 21kHz) and operating temperature ranges do not affect functional substitution within the specified electrical envelope.

Parameter Comparison

Engineering Selection Recommendations

All four MAX680 variants are active products with full manufacturer support, addressing the obsolescence of the TCM680EOA. Selection between substitute options depends on specific application requirements:

MAX680ESA+ and MAX680ESA+T are preferred for applications requiring extended operating temperature range (-40°C to 85°C), matching the TCM680EOA temperature specification. These variants ensure thermal performance consistency across industrial and automotive temperature environments.

MAX680CSA+ and MAX680CSA+T are suitable for commercial temperature range applications (0°C to 70°C). These variants provide cost optimization for consumer and standard industrial applications where extended temperature operation is not required.

Packaging differentiation between tube (CSA+, ESA+) and cut tape with Digi-Reel (CSA+T, ESA+T) reflects supply chain and assembly process preferences. Both packaging formats deliver identical electrical performance and compliance certifications (ROHS3, REACH Unaffected, EAR99).

Frequently Asked Questions (FAQ)

Q: Can MAX680 parts directly replace TCM680EOA in existing designs?

A: Yes. All MAX680 variants maintain electrical compatibility across the critical parameters: dual rail output configuration, ±2Vin output voltage, 10mA output current, 2V to 6V input range (which encompasses the TCM680EOA 2V to 5.5V range), and identical 8-SOIC package form factor. Pin-to-pin compatibility and functional operation are preserved.

Q: What is the difference between MAX680CSA+ and MAX680ESA+ variants?

A: The primary difference is operating temperature range. MAX680CSA+ operates from 0°C to 70°C (commercial grade), while MAX680ESA+ operates from -40°C to 85°C (extended/industrial grade). Both deliver identical electrical performance. Selection depends on the target application environment. For applications originally designed with TCM680EOA's -40°C to 85°C range, MAX680ESA+ maintains thermal specification parity.

Q: What is the significance of the "+T" suffix in part numbers?

A: The "+T" suffix indicates cut tape and Digi-Reel packaging format, optimized for automated assembly processes. Parts without the "+T" suffix are supplied in tube packaging. Electrical specifications and performance are identical between packaging formats. Selection is based on manufacturing process requirements and supply chain logistics.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All MAX680 variants are ROHS3 compliant and REACH unaffected, matching the compliance status of the TCM680EOA. These certifications are maintained across all packaging and temperature variants.

Q: Does the switching frequency difference (21kHz vs. 8kHz) affect circuit operation?

A: The switching frequency difference does not affect functional substitution within the specified electrical envelope. Both frequencies operate within acceptable ranges for charge pump regulator applications. The lower switching frequency of MAX680 parts may result in slightly different noise characteristics and component sizing considerations for filtering, but does not compromise electrical compatibility or output voltage regulation.

Q: Which substitute part offers the best inventory availability?

A: MAX680CSA+T offers the highest inventory availability at 79,256 pieces in stock, followed by MAX680ESA+ at 5,448 pieces and MAX680ESA+T at 8,509 pieces. MAX680CSA+ maintains 1,900 pieces in stock. Availability should be evaluated against specific application temperature requirements and packaging preferences.