MCP79511T-I/MS Equivalent & Substitute Parts

Part Overview

The MCP79511T-I/MS is an active Real Time Clock (RTC) IC with integrated Clock/Calendar functionality, manufactured by Microchip Technology. This device provides time and date tracking with SPI interface, operating across 1.8V to 3.6V supply voltage range. The part is RoHS3 compliant and currently in active production status with 5400 units in stock.

Substitute parts are identified when equivalent Clock/Calendar RTC functionality is required and the application parameters align with the allowed electrical and mechanical specifications of this product category.

Substiute Parts

MCP79511T-I/MS

Microchip TechnologyIn Stock: 5437MCP79511T-I/MS Datasheet

Current PartRFQ

DS1390U-33+T&R

Analog Devices Inc./Maxim IntegratedIn Stock: 12286DS1390U-33+T&R Datasheet

MFR RecommendedRFQ

M41T93RQA6F

STMicroelectronicsIn Stock: 1695M41T93RQA6F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MCP79511T-I/MS are qualified based on the following criteria:

Core Functional Requirements:

• Clock/Calendar RTC functionality with SPI interface
• Operating temperature range: -40°C ~ 85°C
• Surface mount packaging
• Active product status
• RoHS3 compliance

Electrical Compatibility Considerations:

• Supply voltage range must overlap or encompass application requirements
• Battery backup voltage support
• Timekeeping current specifications
• Time and date format support (12/24 hour, YY-MM-DD-dd)

Mechanical Compatibility:

• Package form factor and pin count alignment
• Mounting type (Surface Mount)

Two substitute parts meet these criteria: DS1390U-33+T&R (Analog Devices Inc./Maxim Integrated) and M41T93RQA6F (STMicroelectronics).

Parameter Comparison

Engineering Selection Recommendations

DS1390U-33+T&R Selection Criteria: This substitute maintains identical package form factor (10-TFSOP, 10-MSOP) and SPI interface. Supply voltage range extends to 5.5V, supporting broader application requirements. Timekeeping current is higher at 175µA compared to 1µA of the MCP79511T-I/MS. All parts are RoHS3 compliant and active status. This part is suitable for applications where package compatibility is critical and higher supply voltage tolerance is beneficial.

M41T93RQA6F Selection Criteria: This substitute provides SPI interface and identical operating temperature range. Supply voltage extends to 5.5V with lower timekeeping current (10µA @ 5.5V). Package differs to 16-VQFN Exposed Pad, requiring PCB layout modification. Time format supports 24-hour operation only. All parts are RoHS3 compliant and active status. This part is suitable for applications where package change is acceptable and lower power consumption at higher voltages is required.

Frequently Asked Questions (FAQ)

Q: Can DS1390U-33+T&R be used as a direct replacement for MCP79511T-I/MS? A: DS1390U-33+T&R shares identical package form factor (10-TFSOP, 10-MSOP) and SPI interface. Direct PCB substitution is possible. However, timekeeping current differs significantly (175µA vs. 1µA), which may impact battery backup duration in low-power applications.

Q: What are the package differences between these substitute parts? A: MCP79511T-I/MS and DS1390U-33+T&R both use 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) packaging. M41T93RQA6F uses 16-VQFN Exposed Pad packaging, requiring different PCB footprint and layout considerations.

Q: Are all three parts RoHS3 compliant? A: Yes. MCP79511T-I/MS, DS1390U-33+T&R, and M41T93RQA6F are all RoHS3 compliant.

Q: What is the supply voltage compatibility range across these parts? A: MCP79511T-I/MS operates at 1.8V ~ 3.6V. DS1390U-33+T&R and M41T93RQA6F extend to 2.97V ~ 5.5V and 2.7V ~ 5.5V respectively. Applications requiring 1.8V ~ 2.7V operation must use MCP79511T-I/MS or verify substitute compatibility with specific voltage requirements.

Q: How do timekeeping current specifications compare? A: MCP79511T-I/MS draws 1µA @ 1.8V ~ 3.6V. DS1390U-33+T&R draws 175µA @ 2.97V ~ 5.5V. M41T93RQA6F draws 10µA @ 5.5V. Lower timekeeping current extends battery backup duration in applications with limited backup power capacity.

Q: Does M41T93RQA6F support 12-hour time format? A: M41T93RQA6F supports 24-hour time format only. MCP79511T-I/MS and DS1390U-33+T&R support both 12/24-hour formats. Applications requiring 12-hour format operation must use MCP79511T-I/MS or DS1390U-33+T&R.