MAX6191CESA Series Voltage Reference IC Equivalent & Substitute Parts

Part Overview

The MAX6191CESA is a Series Voltage Reference IC manufactured by Analog Devices Inc./Maxim Integrated, designed to provide a fixed 2.048V output with ±0.49% tolerance. This component operates as a precision voltage reference for analog and mixed-signal applications requiring stable reference voltages across industrial temperature ranges. The MAX6191CESA is classified as obsolete, making identification of suitable substitute components essential for ongoing system support, design updates, and production continuity. Current inventory of 3,912 pieces remains available, though active alternatives should be evaluated for new designs and long-term availability assurance.

Substiute Parts

MAX6191CESA

Analog Devices Inc./Maxim IntegratedIn Stock: 3948MAX6191CESA Datasheet

Current PartRFQ

MAX6191CESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 1025MAX6191CESA+ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX6191CESA is determined by strict equivalence across the following critical parameters:

• Fixed output voltage of 2.048V
• Output tolerance of ±0.49%
• Maximum output current of 500 µA
• Input voltage range of 2.5V ~ 12.6V
• Temperature coefficient of 25 ppm/°C
• Operating temperature range of -40°C ~ 85°C
• 8-SOIC surface mount package configuration
• Noise specifications: 40 µVp-p (0.1Hz to 10Hz) and 105 µVrms (10Hz to 10kHz)

The MAX6191CESA+ qualifies as a parametric equivalent substitute, maintaining identical electrical specifications and package footprint while offering improved product status and compliance certifications suitable for current procurement and design requirements.

Parameter Comparison

Engineering Selection Recommendations

The MAX6191CESA+ serves as the direct substitute for the obsolete MAX6191CESA, offering identical electrical performance and mechanical compatibility. The primary distinction lies in product status and regulatory compliance. The MAX6191CESA+ maintains Active product status, ensuring continued manufacturer support and availability for future procurement cycles. Additionally, the MAX6191CESA+ achieves ROHS3 compliance, meeting current environmental and regulatory requirements for electronic components in most jurisdictions, whereas the original MAX6191CESA is RoHS non-compliant.

For applications requiring immediate component replacement or new design implementations, the MAX6191CESA+ is the appropriate selection. Both components share identical electrical characteristics, including output voltage, tolerance, temperature coefficient, and noise performance, ensuring functional equivalence in circuit applications. The 8-SOIC package footprint remains consistent, permitting direct PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can the MAX6191CESA+ be used as a direct replacement for the MAX6191CESA in existing designs?

A: Yes. The MAX6191CESA+ provides identical electrical specifications and package footprint. Both components deliver 2.048V fixed output with ±0.49% tolerance, 500 µA output current capability, and operate across -40°C to 85°C. The 8-SOIC surface mount package dimensions are equivalent, permitting direct substitution without PCB modification.

Q: What is the significance of the product status difference between these parts?

A: The MAX6191CESA is classified as Obsolete, indicating discontinued manufacturing and limited long-term availability. The MAX6191CESA+ maintains Active status, ensuring ongoing manufacturer production, technical support, and procurement availability. For new designs or systems requiring extended component lifespan, the Active status of MAX6191CESA+ provides supply chain assurance.

Q: How do the RoHS compliance differences affect component selection?

A: The MAX6191CESA is RoHS non-compliant, while the MAX6191CESA+ achieves ROHS3 compliance. ROHS3 compliance is required for products sold in the European Union and many other markets. If your application or end-market requires RoHS certification, the MAX6191CESA+ is the mandatory selection.

Q: Are the noise characteristics identical between both parts?

A: Yes. Both the MAX6191CESA and MAX6191CESA+ specify identical noise performance: 40 µVp-p across the 0.1Hz to 10Hz band and 105 µVrms across the 10Hz to 10kHz band. Noise performance is equivalent for precision analog applications.

Q: What packaging differences exist between these components?

A: The MAX6191CESA is supplied in bulk packaging, while the MAX6191CESA+ is supplied in tube packaging. Both use the same 8-SOIC package type. Tube packaging provides improved component protection and handling efficiency during assembly operations.

Q: Are there any electrical parameter differences that would affect circuit performance?

A: No. All critical electrical parameters are identical: output voltage (2.048V), tolerance (±0.49%), output current (500 µA), temperature coefficient (25 ppm/°C), input voltage range (2.5V ~ 12.6V), and supply current (35 µA). Circuit performance remains unchanged when substituting between these parts.