DS14287+ Equivalent & Substitute Parts

Part Overview

The DS14287+ 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 (Non-Volatile Static RAM) with parallel interface connectivity in a 24-DIP through-hole package. The DS14287+ is classified as obsolete, making identification of functionally equivalent substitute components essential for ongoing system support, maintenance, and new design implementations where legacy compatibility is required.

Substiute Parts

DS14287+

Analog Devices Inc./Maxim IntegratedIn Stock: 2019DS14287+ Datasheet

Current PartRFQ

DS1687-5+

Analog Devices Inc./Maxim IntegratedIn Stock: 1365DS1687-5+ Datasheet

MFR RecommendedRFQ

BQ3285S-SB2

Texas InstrumentsIn Stock: 1987BQ3285S-SB2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DS14287+ are identified based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

• Clock/Calendar functionality with parallel interface
• Memory capacity of 114B or greater
• Supply voltage range 4.5V ~ 5.5V
• Battery backup voltage support (2.5V minimum)
• Operating temperature range 0°C ~ 70°C
• Time and date format support (HH:MM:SS, YY-MM-DD-dd)
• Core features: Alarm, NVSRAM, Square Wave Output

Substitution Groups:

Group 1: Direct Functional Equivalent (Same Package)

• BQ3285S-SB2 (Texas Instruments): Maintains 114B memory, identical electrical specifications, but uses 24-SOIC surface-mount package instead of through-hole DIP

Group 2: Enhanced Capability Substitute (Same Manufacturer, Through-Hole Package)

• DS1687-5+ (Analog Devices Inc./Maxim Integrated): Maintains through-hole 24-DIP package, increases memory to 242B, adds Y2K feature, active product status

Parameter Comparison

Engineering Selection Recommendations

For Through-Hole PCB Designs (Recommended Primary Substitute): DS1687-5+ is the preferred substitute when PCB layout accommodates through-hole mounting. This part maintains identical package footprint compatibility with the DS14287+, is manufactured by the same supplier (Analog Devices Inc./Maxim Integrated), and carries active product status ensuring long-term availability. The increased memory capacity (242B vs. 114B) provides additional storage without electrical or mechanical incompatibility. Both parts meet ROHS3 compliance and identical operating temperature specifications.

For Surface-Mount PCB Designs (Alternative Substitute): BQ3285S-SB2 provides functional equivalence when surface-mount technology is required or preferred. This Texas Instruments part maintains identical memory capacity (114B), electrical supply specifications, and feature set including Daylight Savings and Leap Year support. The 24-SOIC package requires PCB redesign but offers reduced board space. Active product status and ROHS3 compliance ensure regulatory and supply chain continuity.

Product Status Consideration: Both substitute parts carry active product status, providing superior long-term availability compared to the obsolete DS14287+. Selection between DS1687-5+ and BQ3285S-SB2 should be determined by existing PCB mounting technology and design constraints rather than functional capability.

Frequently Asked Questions (FAQ)

Q: Can DS1687-5+ directly replace DS14287+ without PCB modification? A: Yes. DS1687-5+ uses the identical 24-DIP through-hole package (0.600", 15.24mm) and maintains all electrical specifications including supply voltage (4.5V ~ 5.5V), battery backup voltage (2.5V ~ 3.7V), and operating temperature range (0°C ~ 70°C). Pin-to-pin compatibility is maintained. The increased memory capacity (242B vs. 114B) does not affect compatibility.

Q: What is the primary difference between DS1687-5+ and BQ3285S-SB2? A: The primary difference is package type. DS1687-5+ uses through-hole 24-DIP mounting, while BQ3285S-SB2 uses surface-mount 24-SOIC. Both maintain 114B memory capacity and identical electrical specifications. DS1687-5+ adds Y2K support; BQ3285S-SB2 retains Daylight Savings functionality. Selection depends on PCB assembly technology.

Q: Are all substitute parts RoHS compliant? A: Yes. DS14287+, DS1687-5+, and BQ3285S-SB2 are all ROHS3 compliant, meeting environmental and regulatory requirements for electronic component manufacturing and use.

Q: What is the battery backup voltage difference between substitutes? A: DS14287+ supports 2.5V ~ 3.6V battery backup. DS1687-5+ extends this to 2.5V ~ 3.7V. BQ3285S-SB2 provides the widest range at 2.5V ~ 4V. All three parts maintain minimum 2.5V support, ensuring compatibility with standard backup battery configurations.

Q: Why is DS14287+ classified as obsolete? A: Obsolete status indicates the manufacturer has discontinued production. Substitute parts DS1687-5+ and BQ3285S-SB2 carry active product status, ensuring continued manufacturing and supply availability for new designs and legacy system support.

Q: Can BQ3285S-SB2 be used in existing through-hole PCB designs? A: No. BQ3285S-SB2 requires surface-mount assembly technology. Existing through-hole PCB designs must use DS1687-5+ or source remaining DS14287+ inventory. PCB redesign is necessary to accommodate BQ3285S-SB2.