DS1306EN Equivalent & Substitute Parts

Part Overview

The DS1306EN is a Real Time Clock (RTC) IC with integrated Clock/Calendar functionality, manufactured by Analog Devices Inc./Maxim Integrated. This device provides 96 bytes of non-volatile static RAM (NVSRAM) with SPI interface, supporting 12/24-hour time format and full date tracking with leap year compensation. The DS1306EN is classified as obsolete, making identification of active equivalent parts essential for new designs and ongoing production requirements.

Substiute Parts

DS1306EN

Analog Devices Inc./Maxim IntegratedIn Stock: 3049DS1306EN Datasheet

Current PartRFQ

DS1306EN+

Analog Devices Inc./Maxim IntegratedIn Stock: 3213DS1306EN+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DS1306EN is determined by strict equivalence across the following parameters:

• Interface Protocol: SPI (Serial Peripheral Interface)
• Memory Capacity: 96 bytes NVSRAM
• Time/Date Format: HH:MM:SS (12/24 hr) and YY-MM-DD-dd
• Package Configuration: 20-TSSOP surface mount
• Voltage Specifications: 2V ~ 5.5V supply and battery operation
• Functional Features: Alarm, Leap Year, Square Wave Output, Trickle-Charger
• Temperature Range: -40°C ~ 85°C

The DS1306EN+ meets all electrical and mechanical substitution criteria, with the primary distinction being active product status and improved compliance certification.

Parameter Comparison

Engineering Selection Recommendations

The DS1306EN+ is the direct functional equivalent of the DS1306EN, with identical electrical performance and package specifications. Selection between these parts is determined by regulatory and supply chain requirements:

DS1306EN+ is the preferred selection for new designs and ongoing production due to active product status and ROHS3 compliance certification. This part eliminates obsolescence risk and meets current environmental regulations.

DS1306EN remains available for legacy system maintenance where existing inventory is sufficient and regulatory compliance is not a constraint. The obsolete status indicates limited future availability.

Both parts are manufactured by the same supplier and share identical functional specifications, memory architecture, and interface protocols.

Frequently Asked Questions (FAQ)

Q: Can DS1306EN+ directly replace DS1306EN in existing designs? A: Yes. The DS1306EN+ is electrically and mechanically identical to the DS1306EN. No circuit modifications or firmware changes are required. Both parts use the same 20-TSSOP package and support identical SPI communication protocols.

Q: What is the primary difference between DS1306EN and DS1306EN+? A: The DS1306EN+ has active product status and ROHS3 compliance certification, while the DS1306EN is obsolete and RoHS non-compliant. Functional performance and electrical specifications are identical.

Q: Are there packaging differences between these parts? A: The DS1306EN is supplied in standard packaging, while the DS1306EN+ is supplied in Tube packaging. Both use the same 20-TSSOP (0.173", 4.40mm Width) surface mount package. Tube packaging is standard for active production parts.

Q: What memory capacity does the DS1306EN provide? A: The DS1306EN contains 96 bytes of non-volatile static RAM (NVSRAM) for user data storage, separate from the clock/calendar registers.

Q: Is the SPI interface compatible with standard microcontroller implementations? A: Yes. The DS1306EN and DS1306EN+ use standard SPI protocol, compatible with any microcontroller or processor with SPI capability. Clock speed and timing specifications are defined in the device datasheet.

Q: What is the battery backup voltage range? A: Both parts support battery operation across the full 2V ~ 5.5V range, enabling continuous timekeeping during main power loss.