CAP1166-1-CZC-TR Equivalent & Substitute Parts

Part Overview

The CAP1166-1-CZC-TR is a capacitive touch sensor and LED driver IC manufactured by Microchip Technology, designed for interface applications requiring multi-channel touch input detection and LED control. This device features 6 capacitive touch inputs, 6 LED driver channels, and communication via I2C, SMBus, or SPI protocols. The part is classified as obsolete, making identification of suitable substitute components necessary for ongoing design support and procurement planning.

Substiute Parts

CAP1166-1-CZC-TR

Microchip TechnologyIn Stock: 3742CAP1166-1-CZC-TR Datasheet

Current PartRFQ

CAP1166-1-BP-TR

Microchip TechnologyIn Stock: 3721CAP1166-1-BP-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CAP1166-1-CZC-TR is determined by the following critical parameters:

• Functional equivalence: Same base product number (CAP1166) ensures identical touch input channels (6), LED driver channels (6), and communication protocols (I2C, SMBus, SPI)
• Electrical compatibility: Matching supply voltage range (3V ~ 3.6V) and supply current specification (500µA)
• Operating conditions: Identical operating temperature range (-40°C ~ 125°C)
• Regulatory compliance: Both parts maintain ROHS3 compliance and REACH unaffected status
• Package compatibility: Surface mount technology with different package variants (24-SSOP vs. 20-QFN) that accommodate the same functional die

The CAP1166-1-BP-TR qualifies as a direct substitute based on these parameters, with the primary difference being the package form factor and associated moisture sensitivity level.

Parameter Comparison

Engineering Selection Recommendations

The CAP1166-1-BP-TR is the designated substitute for the obsolete CAP1166-1-CZC-TR. Both parts share identical functional specifications, electrical characteristics, and regulatory compliance status. The primary distinction is the package form factor: the main part uses 24-SSOP packaging while the substitute employs 20-TQFN with exposed pad. Both are surface mount devices suitable for automated assembly.

The substitute part carries active product status, ensuring continued availability and manufacturing support. Both parts maintain ROHS3 compliance and REACH unaffected designation. The difference in moisture sensitivity level (MSL 1 versus MSL 3) reflects standard industry variations between package types and does not affect functional equivalence.

Frequently Asked Questions (FAQ)

Q: Can CAP1166-1-BP-TR directly replace CAP1166-1-CZC-TR in existing designs?

A: Functional replacement is possible due to identical electrical specifications and communication protocols. However, PCB layout modification is required due to different package geometries (24-SSOP versus 20-TQFN). Pin mapping must be verified against the respective datasheets to ensure correct signal routing.

Q: What is the significance of the different package types?

A: The 24-SSOP package is a gull-wing surface mount package with 0.209" width, while the 20-TQFN is a quad flat no-lead package with 4x4mm dimensions and exposed pad. The 20-TQFN typically offers improved thermal performance and smaller footprint. Both are surface mount technologies compatible with standard reflow soldering processes.

Q: Why is the main part listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The CAP1166-1-BP-TR maintains active status, making it the recommended path for new designs and ongoing procurement.

Q: Are there differences in moisture handling between these parts?

A: The main part has MSL 1 (unlimited moisture exposure tolerance), while the substitute has MSL 3 (168-hour limit at specified humidity). This reflects standard packaging differences and requires adherence to standard moisture control procedures during storage and assembly for the substitute part.

Q: Do both parts support the same communication protocols?

A: Yes. Both CAP1166-1-CZC-TR and CAP1166-1-BP-TR support I2C, SMBus, and SPI communication interfaces with identical electrical specifications.