DS1306E Equivalent & Substitute Parts

Part Overview

The DS1306E is a Real Time Clock (RTC) IC with integrated Clock/Calendar functionality, manufactured by Analog Devices Inc./Maxim Integrated. This component provides 96 bytes of NVSRAM (Non-Volatile Static RAM) with SPI interface, supporting 12/24-hour time format and YY-MM-DD-dd date format. The device features alarm capability, leap year compensation, square wave output, and trickle-charger functionality.

The DS1306E is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support legacy system maintenance or redesign initiatives.

Substiute Parts

DS1306E

Analog Devices Inc./Maxim IntegratedIn Stock: 2014DS1306E Datasheet

Current PartRFQ

DS1306E+

Analog Devices Inc./Maxim IntegratedIn Stock: 2857DS1306E+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DS1306E is determined by strict equivalence across the following critical parameters:

• Interface Protocol: SPI communication interface
• Memory Configuration: 96B NVSRAM capacity
• Functional Features: Alarm, Leap Year, Square Wave Output, Trickle-Charger
• Electrical Specifications: Supply voltage range 2V ~ 5.5V; timekeeping current 25.3µA ~ 81µA @ 2V ~ 5V
• Time/Date Format: HH:MM:SS (12/24 hr) and YY-MM-DD-dd
• Package: 20-TSSOP surface mount
• Operating Temperature: 0°C ~ 70°C

The DS1306E+ is identified as a direct substitute based on identical electrical, functional, and mechanical parameters. The primary distinction is product status and compliance certification.

Parameter Comparison

Engineering Selection Recommendations

The DS1306E+ is a direct functional and electrical equivalent to the DS1306E. Selection between these parts should be based on the following criteria:

For Legacy System Maintenance: The DS1306E remains suitable for repair and maintenance of existing systems where the obsolete status does not impact procurement or regulatory requirements.

For New Designs or Redesigns: The DS1306E+ is the preferred selection due to its active product status, ensuring long-term availability and supply chain stability. Additionally, the DS1306E+ meets ROHS3 compliance, whereas the DS1306E is RoHS non-compliant. This distinction is critical for applications subject to RoHS regulations or customer requirements mandating RoHS-compliant components.

Regulatory Compliance: If the application requires RoHS compliance or operates under regulatory frameworks that restrict non-compliant components, the DS1306E+ is the only suitable option.

Both parts are electrically and functionally identical, with identical pinout, package dimensions, and performance characteristics. No circuit modifications are required for substitution.

Frequently Asked Questions (FAQ)

Q: Can DS1306E+ be used as a direct replacement for DS1306E in existing designs?

A: Yes. The DS1306E+ is electrically and functionally identical to the DS1306E. Both devices share identical pinout, package dimensions (20-TSSOP), supply voltage range (2V ~ 5.5V), timekeeping current specifications, and all functional features. No circuit modifications are required.

Q: What is the primary difference between DS1306E and DS1306E+?

A: The primary differences are product status and compliance certification. The DS1306E is obsolete, while the DS1306E+ is active. The DS1306E+ meets ROHS3 compliance, whereas the DS1306E is RoHS non-compliant. Electrical and functional specifications are identical.

Q: Are there any package or mounting differences?

A: Both parts use the same 20-TSSOP surface mount package with 0.173" width (4.40mm). The DS1306E+ is supplied in Tube packaging, while the DS1306E packaging specification is not provided. This does not affect electrical compatibility or circuit performance.

Q: Which part should be selected for new product designs?

A: The DS1306E+ should be selected for new designs. It offers active product status, ensuring availability and supply chain continuity. Additionally, ROHS3 compliance meets modern regulatory and customer requirements.

Q: Is substitution affected by operating temperature range?

A: No. Both parts operate across the identical temperature range of 0°C ~ 70°C. Substitution does not introduce temperature-related constraints.

Q: Are the SPI interface and communication protocols identical?

A: Yes. Both parts use SPI interface with identical protocol implementation. No firmware or software modifications are required for substitution.