COM-11645 Addressable LED 7 Segment I2C Yellow Display

Part Overview

The COM-11645 is a 4-digit addressable LED 7-segment display module manufactured by SparkFun Electronics. This component integrates an ATMega328 microcontroller with I2C, SPI, and UART interface capabilities, designed for applications requiring multi-digit numeric or alphanumeric display output. The product is currently classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing system designs and maintenance applications.

Substiute Parts

COM-11645

SparkFun ElectronicsIn Stock: 962COM-11645 Datasheet

Current PartRFQ

879

Adafruit Industries LLCIn Stock: 874879 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the COM-11645 is determined by the following critical parameters:

• Display Configuration: 7-segment format with 4-digit capacity
• Display Color: Yellow LED output
• Primary Interface: I2C communication protocol
• Mounting Type: User-defined installation
• Regulatory Compliance: RoHS compliance status
• Moisture Sensitivity: MSL 1 rating

The substitute part Adafruit Industries LLC model 879 meets the core functional requirements of a 4-digit yellow 7-segment display with I2C interface capability. While the controller architecture differs (MAX7219 versus ATMega328), both implementations provide equivalent I2C-based addressable control for multi-digit display applications.

Parameter Comparison

Engineering Selection Recommendations

The Adafruit Industries LLC model 879 serves as a direct functional substitute for the obsolete COM-11645. Both modules provide 4-digit yellow 7-segment display capability with I2C interface support. The 879 maintains active product status with ROHS3 compliance, ensuring continued availability and regulatory alignment for new designs.

The primary technical distinction is the controller implementation: the COM-11645 utilizes an ATMega328 microcontroller supporting I2C, SPI, and UART protocols, while the 879 employs a MAX7219 driver with I2C interface. For applications requiring only I2C communication, the 879 provides equivalent functionality. Systems dependent on SPI or UART protocols would require additional interface conversion or alternative component selection.

Both modules share identical dimensional specifications (40.60mm L x 22.90mm W) and MSL 1 moisture sensitivity rating, supporting equivalent mechanical integration and environmental handling requirements.

Frequently Asked Questions (FAQ)

Q: Can the Adafruit 879 directly replace the COM-11645 in existing designs?

A: Direct replacement is viable for applications utilizing I2C communication exclusively. The 879 provides equivalent 4-digit yellow 7-segment display functionality with I2C interface. Designs dependent on SPI or UART protocols require interface adaptation or alternative component selection.

Q: Are there dimensional compatibility concerns between these modules?

A: Both modules share identical dimensions of 40.60mm L x 22.90mm W, supporting equivalent mechanical mounting and PCB layout integration.

Q: What is the significance of the controller type difference?

A: The COM-11645 uses an ATMega328 microcontroller, while the 879 uses a MAX7219 display driver. Both architectures support I2C-based addressable control. The MAX7219 is a dedicated display driver optimized for 7-segment applications, while the ATMega328 is a general-purpose microcontroller. For I2C-only applications, both provide equivalent functionality.

Q: Are both modules RoHS compliant?

A: Yes. The COM-11645 is RoHS Compliant, and the 879 is ROHS3 Compliant, both meeting current regulatory requirements.

Q: What is the moisture sensitivity rating, and does it affect component handling?

A: Both modules carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions during storage, handling, or assembly processes.