MCP3302-CI/ST Equivalent & Substitute Parts

Part Overview

The MCP3302-CI/ST is a 13-bit Analog to Digital Converter (ADC) manufactured by Microchip Technology, designed for data acquisition applications requiring moderate resolution and sampling rates. This SAR (Successive Approximation Register) architecture device supports 2 or 4 input channels with both differential and single-ended input configurations, communicating via SPI interface. The part is currently in active production status with 838 units in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the same product family.

Substiute Parts

MCP3302-CI/ST

Microchip TechnologyIn Stock: 905MCP3302-CI/ST Datasheet

Current PartRFQ

MCP3302-BI/ST

Microchip TechnologyIn Stock: 5505MCP3302-BI/ST Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The MCP3302-CI/ST and MCP3302-BI/ST are parametric equivalents within the Microchip MCP3302 product family. Substitution between these parts is valid based on the following criteria:

Key Parameters Determining Substitutability:

• Resolution: Both parts are 13-bit ADCs
• Sampling Rate: Both support 100k samples per second
• Input Configuration: Both support 2 or 4 channels with differential and single-ended inputs
• Interface Protocol: Both use SPI communication
• Architecture: Both employ SAR conversion methodology
• Supply Voltages: Both require 5V analog and digital supplies
• Operating Temperature Range: Both rated -40°C to 85°C
• Package: Both use 14-TSSOP surface mount package with identical dimensions
• Compliance: Both are ROHS3 compliant with MSL 1 rating

The difference between these parts lies in the temperature coefficient and performance grade designation (CI vs. BI suffix), which does not affect functional compatibility in applications where the specified operating temperature range is acceptable.

Parameter Comparison

Engineering Selection Recommendations

Both MCP3302-CI/ST and MCP3302-BI/ST are active production parts with full ROHS3 compliance and unlimited moisture sensitivity rating. Selection between these equivalents should be based on availability and supply chain requirements. The MCP3302-BI/ST currently has higher inventory availability (5418 units) compared to the MCP3302-CI/ST (838 units), making it suitable for applications where supply continuity is a priority. Both parts maintain identical electrical specifications and package compatibility, ensuring direct substitution in existing designs without circuit modification.

Frequently Asked Questions (FAQ)

Q: Can MCP3302-BI/ST replace MCP3302-CI/ST in existing designs?

A: Yes. Both parts are parametric equivalents with identical resolution (13-bit), sampling rate (100k SPS), input configurations (2 or 4 channels), SPI interface, supply voltages (5V), operating temperature range (-40°C to 85°C), and 14-TSSOP package. Direct substitution is valid without design changes.

Q: What is the difference between the CI and BI designations?

A: The CI and BI suffixes indicate different performance grades within the MCP3302 family. Both meet the same functional specifications and operating parameters provided in this reference. Selection between them is based on availability and supply requirements.

Q: Are the packages physically identical?

A: Yes. Both parts use the 14-TSSOP package with 0.173" width and 4.40mm dimensions. PCB footprints and assembly processes are identical.

Q: Do both parts have the same compliance certifications?

A: Yes. Both MCP3302-CI/ST and MCP3302-BI/ST are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, REACH unaffected status, and EAR99 export classification.

Q: Which part should I select for new designs?

A: Either part is suitable for new designs. Selection should be based on current inventory availability and supply chain lead times. The MCP3302-BI/ST has higher stock levels, making it preferable for applications requiring immediate availability.