MCP795B10-I/ST Equivalent & Substitute Parts

Part Overview

The MCP795B10-I/ST is a Real Time Clock (RTC) IC with Clock/Calendar functionality, 64B memory, and SPI interface manufactured by Microchip Technology. This device is classified as Obsolete, which necessitates identification of active alternative components for new designs and production continuity. The MCP795B10-I/ST operates across a wide supply voltage range of 1.8V to 5.5V and includes integrated features such as alarm, EEPROM, leap year compensation, square wave output, SRAM, unique ID, and watchdog timer functionality.

Substiute Parts

MCP795B10-I/ST

Microchip TechnologyIn Stock: 860MCP795B10-I/ST Datasheet

Current PartRFQ

MCP795W11-I/ST

Microchip TechnologyIn Stock: 1419MCP795W11-I/ST Datasheet

MFR RecommendedRFQ

AB1815-T3

Abracon LLCIn Stock: 52178AB1815-T3 Datasheet

MFR RecommendedRFQ

CDP68HC68T1M2Z

Renesas Electronics CorporationIn Stock: 3259CDP68HC68T1M2Z Datasheet

MFR RecommendedRFQ

M41T93SMY6F

STMicroelectronicsIn Stock: 3156M41T93SMY6F Datasheet

MFR RecommendedRFQ

M41T94MH6F

STMicroelectronicsIn Stock: 22881M41T94MH6F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MCP795B10-I/ST is determined by the following critical parameters:

Primary Compatibility Criteria:

• Interface type (SPI)
• Clock/Calendar functionality with time and date format support (HH:MM:SS:hh and YY-MM-DD-dd)
• Operating temperature range (-40°C ~ 85°C)
• Surface mount packaging
• RoHS3 compliance

Secondary Compatibility Criteria:

• Supply voltage range overlap with 1.8V ~ 5.5V
• Memory capacity (minimum 64B for functional equivalence)
• Integrated features (alarm, watchdog timer, leap year compensation)

Substitute parts are grouped into two categories:

Category 1 - Direct Package Equivalent (14-TSSOP): MCP795W11-I/ST maintains identical package form factor and pinout compatibility. This part operates within a narrower supply voltage range (1.8V ~ 3.6V) and is classified as Active product status.

Category 2 - Functional Equivalents (Alternative Packages): AB1815-T3, CDP68HC68T1M2Z, M41T93SMY6F, and M41T94MH6F provide equivalent RTC Clock/Calendar functionality with SPI interface and -40°C ~ 85°C operating temperature. These parts utilize different package types and may have variations in memory size, supply voltage ranges, and current consumption characteristics.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Same Package): MCP795W11-I/ST is the manufacturer-recommended substitute with identical 14-TSSOP packaging. This part maintains pinout compatibility and is classified as Active product status. The primary design consideration is the reduced supply voltage range (1.8V ~ 3.6V versus 1.8V ~ 5.5V). Selection of MCP795W11-I/ST is appropriate for applications operating within the 1.8V ~ 3.6V supply range.

For Functional Equivalence (Alternative Packages): When package redesign is acceptable, AB1815-T3, CDP68HC68T1M2Z, M41T93SMY6F, and M41T94MH6F provide active RTC Clock/Calendar alternatives. All substitute parts maintain SPI interface, -40°C ~ 85°C operating temperature range, and ROHS3 compliance. Selection among these alternatives depends on specific application requirements regarding memory capacity, supply voltage range, current consumption, and physical package constraints.

AB1815-T3 offers the lowest timekeeping current (0.17µA ~ 0.22µA) and largest memory capacity (256B), suitable for ultra-low-power applications with extended memory requirements.

CDP68HC68T1M2Z operates across the widest supply voltage range (3V ~ 6V) and is appropriate for applications requiring higher supply voltages.

M41T93SMY6F and M41T94MH6F are suitable for applications requiring specific package form factors or memory configurations not available in other alternatives.

Frequently Asked Questions (FAQ)

Q: Can MCP795W11-I/ST be used as a direct replacement for MCP795B10-I/ST? A: MCP795W11-I/ST maintains identical 14-TSSOP package and pinout compatibility. The primary design consideration is the reduced supply voltage range (1.8V ~ 3.6V). Direct replacement is feasible for applications operating within this voltage range without circuit modification.

Q: What are the key differences between MCP795W11-I/ST and the other substitute parts? A: MCP795W11-I/ST is the only substitute maintaining the original 14-TSSOP package form factor. Alternative substitutes (AB1815-T3, CDP68HC68T1M2Z, M41T93SMY6F, M41T94MH6F) utilize different package types and may require PCB layout modifications. All alternatives maintain SPI interface and -40°C ~ 85°C operating temperature compatibility.

Q: Which substitute part has the lowest power consumption? A: AB1815-T3 exhibits the lowest timekeeping current at 0.17µA ~ 0.22µA @ 1.8V ~ 3V, making it suitable for battery-powered applications requiring extended operational life.

Q: Are all substitute parts RoHS3 compliant? A: Yes, all listed substitute parts (MCP795W11-I/ST, AB1815-T3, CDP68HC68T1M2Z, M41T93SMY6F, M41T94MH6F) are ROHS3 compliant.

Q: What is the memory capacity difference between MCP795B10-I/ST and the substitute parts? A: MCP795B10-I/ST provides 64B memory. AB1815-T3 offers 256B (larger capacity), while CDP68HC68T1M2Z provides 32B (reduced capacity). M41T93SMY6F and M41T94MH6F provide 7B and 44B respectively. Memory capacity selection depends on application data storage requirements.

Q: Can substitute parts with different packages be used without circuit redesign? A: Parts with different package types (AB1815-T3 in 16-VFQFN, CDP68HC68T1M2Z in 16-SOIC, M41T93SMY6F in 18-SOX, M41T94MH6F in 28-SOP) require PCB layout modifications and cannot be used as direct pin-for-pin replacements. MCP795W11-I/ST maintains the original 14-TSSOP package and requires no layout changes.

Q: What supply voltage range is common to all substitute parts? A: No single voltage range encompasses all substitutes. MCP795W11-I/ST (1.8V ~ 3.6V), AB1815-T3 (1.7V ~ 3.6V), and M41T93SMY6F (3V ~ 5.5V) support lower voltage operation. CDP68HC68T1M2Z (3V ~ 6V) and M41T94MH6F (2.7V ~ 5.5V) support higher voltage ranges. Application supply voltage requirements determine appropriate substitute selection.