MAX6194CESA+ Equivalent & Substitute Parts

Part Overview

The MAX6194CESA+ is a series voltage reference IC manufactured by Analog Devices Inc./Maxim Integrated, delivering a fixed 4.5V output with ±0.22% tolerance. This Surface Mount device in 8-SOIC packaging is classified as Obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part operates across -40°C to 85°C with low supply current of 35µA and output current capability of 500µA, suitable for precision analog applications requiring stable voltage references.

Substiute Parts

MAX6194CESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 790MAX6194CESA+ Datasheet

Current PartRFQ

MAX6194CESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 790MAX6194CESA+ Datasheet

DirectRFQ

LTC1798CS8-4.1#PBF

Analog Devices Inc.In Stock: 1238LTC1798CS8-4.1#PBF Datasheet

MFR RecommendedRFQ

LTC1798CS8-4.1#TRPBF

Analog Devices Inc.In Stock: 863LTC1798CS8-4.1#TRPBF Datasheet

MFR RecommendedRFQ

LTC1798CS8-5#PBF

Analog Devices Inc.In Stock: 2356LTC1798CS8-5#PBF Datasheet

MFR RecommendedRFQ

LTC1798CS8-5#TRPBF

Analog Devices Inc.In Stock: 2557LTC1798CS8-5#TRPBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX6194CESA+ is determined by the following critical parameters:

Mechanical Compatibility: All substitute parts must use the 8-SOIC (0.154", 3.90mm Width) Surface Mount package to ensure PCB footprint compatibility without layout redesign.

Electrical Compatibility: Substitute parts must operate within the input voltage range of 4.7V ~ 12.6V and maintain fixed output voltage reference functionality. The output voltage, tolerance, and temperature coefficient determine functional equivalence for specific circuit applications.

Compliance & Status: Active product status is preferred for long-term availability. ROHS3 compliance and MSL 1 rating are maintained across all substitute options.

The LTC1798 series from Analog Devices Inc. provides direct functional substitution with improved specifications in tolerance (±0.15% vs ±0.22%) and noise performance, while maintaining identical package geometry and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

For 4.5V Output Applications: The MAX6194CESA+ is Obsolete. Direct voltage substitution is not available in the LTC1798 series. Applications requiring 4.5V output must evaluate circuit-level modifications or alternative reference architectures. The LTC1798CS8-5#PBF or LTC1798CS8-5#TRPBF (5V output) may be suitable if the application tolerates higher output voltage with corresponding circuit adjustments.

For 4.096V Output Applications: LTC1798CS8-4.1#PBF and LTC1798CS8-4.1#TRPBF provide Active product status with improved specifications. These parts deliver superior tolerance (±0.15%), lower noise (8µVp-p vs 110µVp-p), and reduced supply current (8.5µA vs 35µA). Both maintain ROHS3 compliance and MSL 1 rating. Selection between Tube (#PBF) and Tape & Reel (#TRPBF) packaging depends on procurement volume and assembly requirements.

For 5V Output Applications: LTC1798CS8-5#PBF and LTC1798CS8-5#TRPBF are Active alternatives with identical performance advantages. Higher inventory availability (2300 and 2450 units respectively) supports production continuity.

Temperature Range Consideration: The MAX6194CESA+ operates to -40°C; LTC1798 substitutes operate to 0°C minimum. Applications requiring extended low-temperature operation below 0°C must retain the original part or identify alternative reference ICs with matching temperature specifications.

Compliance & Availability: All LTC1798 variants maintain ROHS3 compliance, MSL 1 rating, and REACH Unaffected status. Active product status ensures long-term availability and manufacturing support.

Frequently Asked Questions (FAQ)

Q: Can LTC1798CS8-5#PBF directly replace MAX6194CESA+ in a 4.5V reference circuit?

A: No. The LTC1798CS8-5#PBF outputs 5V, not 4.5V. Direct substitution requires circuit redesign to accommodate the higher output voltage. If the application can tolerate 5V output, the LTC1798CS8-5#PBF is mechanically and electrically compatible in the 8-SOIC package.

Q: What is the difference between LTC1798CS8-4.1#PBF and LTC1798CS8-4.1#TRPBF?

A: Both parts are electrically identical with 4.096V output. The difference is packaging: #PBF is supplied in Tube packaging for lower-volume applications, while #TRPBF is supplied in Tape & Reel format for automated assembly and higher-volume production. Select based on procurement volume and assembly process requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The MAX6194CESA+ and all LTC1798 variants listed are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with modern manufacturing and environmental standards.

Q: Why do LTC1798 substitutes have lower supply current than MAX6194CESA+?

A: The LTC1798 series incorporates more efficient internal circuitry, reducing quiescent current from 35µA to 8.5µA. This is a performance improvement that reduces power consumption in battery-powered or low-power applications.

Q: Can MAX6194CESA+ be used in applications requiring 0°C to 70°C operation?

A: Yes. The MAX6194CESA+ operates across -40°C to 85°C, which encompasses the 0°C to 70°C range. However, the part is Obsolete. For new designs, LTC1798 variants are preferred due to Active status and improved specifications.

Q: What is the mechanical compatibility between MAX6194CESA+ and LTC1798 substitutes?

A: Both use identical 8-SOIC (0.154", 3.90mm Width) Surface Mount packages. PCB footprints are directly compatible without layout modifications. Pin configurations must be verified against specific application schematics.

Q: Are there inventory considerations when selecting between substitute parts?

A: Yes. LTC1798CS8-5#PBF has 2300 units in stock, and LTC1798CS8-5#TRPBF has 2450 units, providing strong availability. LTC1798CS8-4.1#PBF has 1212 units, and LTC1798CS8-4.1#TRPBF has 852 units. For high-volume production, the 5V variants offer better stock depth.