DS12885Q Equivalent & Substitute Parts

Part Overview

The DS12885Q is a Real Time Clock (RTC) IC with integrated Clock/Calendar functionality, manufactured by Analog Devices Inc./Maxim Integrated. This device provides 114 bytes of NVSRAM with parallel interface, supporting 12/24-hour time format and YY-MM-DD-dd date format. The DS12885Q is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations.

Substiute Parts

DS12885Q

Analog Devices Inc./Maxim IntegratedIn Stock: 2023DS12885Q Datasheet

Current PartRFQ

DS12885Q+

Analog Devices Inc./Maxim IntegratedIn Stock: 1192DS12885Q+ Datasheet

DirectRFQ

M48T58Y-70PC1

STMicroelectronicsIn Stock: 1732M48T58Y-70PC1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the DS12885Q is determined by the following critical parameters:

Primary Substitution Criteria:

• Clock/Calendar functionality with parallel interface
• Memory capacity of 114B or greater
• Time format support for HH:MM:SS (12/24 hr)
• Date format support for YY-MM-DD-dd
• Supply voltage range 4.5V ~ 5.5V
• Operating temperature range 0°C ~ 70°C
• Package compatibility or functional equivalence

Substitute Parts Identified:

1. DS12885Q+ (Direct Manufacturer Equivalent) - Identical electrical and functional specifications with active product status and RoHS3 compliance. Packaging differs (Tube vs. unspecified for original).

2. M48T58Y-70PC1 (Functional Substitute) - STMicroelectronics Timekeeper® series RTC with parallel interface, matching core voltage and temperature specifications. Package differs (28-DIP Module through-hole vs. 28-LCC surface mount). Supports 24-hour time format and YY-MM-DD-dd date format. Lower timekeeping current (3mA vs. 15mA). Lacks specified battery supply voltage range and reduced feature set (no Alarm, Daylight Savings, or Square Wave Output listed).

Parameter Comparison

Engineering Selection Recommendations

DS12885Q+ Selection Criteria: The DS12885Q+ is the direct manufacturer equivalent with identical electrical specifications, memory capacity, and feature set. This part maintains active product status and achieves RoHS3 compliance. Selection of DS12885Q+ is appropriate for applications requiring exact functional replacement with modern compliance certifications and ongoing manufacturer support.

M48T58Y-70PC1 Selection Criteria: The M48T58Y-70PC1 serves as a functional substitute for applications where package form factor can be adapted. This part maintains core voltage and temperature specifications with reduced timekeeping current consumption (3mA vs. 15mA). The transition from surface mount (28-LCC) to through-hole (28-DIP Module) requires PCB redesign. The 24-hour time format limitation (vs. 12/24-hour support) and absence of specified battery supply voltage range must be evaluated against application requirements. RoHS3 compliance and active product status support long-term availability.

Frequently Asked Questions (FAQ)

Q: Can DS12885Q+ be used as a direct replacement for DS12885Q? A: Yes. DS12885Q+ provides identical electrical specifications, memory capacity (114B), interface type (parallel), time/date formats, supply voltages, and operating temperature range. Both parts are packaged in 28-LCC (J-Lead) surface mount configuration. The primary difference is product status (active vs. obsolete) and RoHS compliance (RoHS3 vs. non-compliant).

Q: What are the limitations of M48T58Y-70PC1 as a substitute? A: M48T58Y-70PC1 differs in three key areas: (1) Package form factor changes from 28-LCC surface mount to 28-DIP Module through-hole, requiring PCB redesign; (2) Time format support is limited to 24-hour operation, eliminating 12-hour format capability; (3) Battery supply voltage range is not specified, whereas DS12885Q specifies 2.5V ~ 4V. The part does provide lower timekeeping current (3mA vs. 15mA) and RoHS3 compliance.

Q: Are there package compatibility considerations between substitutes? A: Yes. DS12885Q and DS12885Q+ both use 28-LCC (J-Lead) surface mount packaging and are directly interchangeable at the PCB level. M48T58Y-70PC1 uses 28-DIP Module through-hole packaging, requiring circuit board redesign and different socket/connector implementation. Mounting type conversion from surface mount to through-hole is not a simple component swap.

Q: Which substitute is recommended for new designs? A: Selection depends on design constraints. For surface mount applications requiring exact functional equivalence, DS12885Q+ is the appropriate choice with active product status and RoHS3 compliance. For through-hole designs where 24-hour time format is acceptable and lower power consumption is beneficial, M48T58Y-70PC1 provides an alternative with reduced timekeeping current.

Q: What compliance differences exist between the main part and substitutes? A: DS12885Q is RoHS non-compliant. Both DS12885Q+ and M48T58Y-70PC1 achieve RoHS3 compliance. All three parts are REACH Unaffected and classified under ECCN EAR99. For applications requiring RoHS compliance, either substitute part is suitable.