DS1672S-3 Real Time Clock IC Equivalent & Substitute Parts

Part Overview

The DS1672S-3 is a Real Time Clock (RTC) IC Binary Counter with I2C 2-Wire Serial interface, manufactured by Analog Devices Inc./Maxim Integrated. This component provides timekeeping functionality in an 8-SOIC surface mount package with integrated trickle-charger capability. The DS1672S-3 is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations. The DS1672S-3+ represents the active production equivalent with identical electrical and mechanical specifications.

Substiute Parts

DS1672S-3

Analog Devices Inc./Maxim IntegratedIn Stock: 1247DS1672S-3 Datasheet

Current PartRFQ

DS1672S-3+

Analog Devices Inc./Maxim IntegratedIn Stock: 1075DS1672S-3+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DS1672S-3 is determined by strict equivalence across the following critical parameters:

• Interface Protocol: I2C 2-Wire Serial communication must be maintained
• Time/Date Format: Binary format requirement must be preserved
• Electrical Specifications: Supply voltage (2.7V ~ 3.3V), battery voltage (1.3V ~ 3.63V), and timekeeping current (500µA @ 3.3V) must remain identical
• Operating Temperature: -40°C ~ 85°C range must be supported
• Package Compatibility: 8-SOIC (0.154", 3.90mm Width) surface mount package is mandatory
• Functional Features: Trickle-charger capability must be present

The DS1672S-3+ meets all substitution criteria as a direct equivalent with identical electrical and mechanical characteristics.

Parameter Comparison

Engineering Selection Recommendations

The DS1672S-3+ is the direct active production substitute for the obsolete DS1672S-3. Both components share identical electrical specifications, interface protocols, and package configurations, ensuring pin-for-pin and functional compatibility.

For new designs and ongoing system support, the DS1672S-3+ is the appropriate selection due to its active product status and ROHS3 compliance. The DS1672S-3+ maintains full backward compatibility with existing DS1672S-3 implementations while offering improved environmental compliance and continued manufacturing availability.

The transition from DS1672S-3 to DS1672S-3+ requires no circuit modifications, firmware changes, or design alterations. Both components operate identically within the specified electrical and thermal parameters.

Frequently Asked Questions (FAQ)

Q: Can DS1672S-3+ directly replace DS1672S-3 in existing designs?

A: Yes. The DS1672S-3+ is a direct pin-for-pin and functional equivalent. No circuit modifications are required.

Q: What is the primary difference between DS1672S-3 and DS1672S-3+?

A: The DS1672S-3 is obsolete, while DS1672S-3+ is in active production. The DS1672S-3+ also achieves ROHS3 compliance. Electrical and mechanical specifications are identical.

Q: Are the I2C communication protocols identical between these parts?

A: Yes. Both components implement I2C 2-Wire Serial interface with identical protocol specifications and binary time/date format.

Q: Does packaging differ between the two parts?

A: Both use 8-SOIC (0.154", 3.90mm Width) surface mount packages. The DS1672S-3+ is supplied in tube packaging, while the DS1672S-3 uses standard packaging.

Q: What are the critical parameters for substitution compatibility?

A: Interface type (I2C 2-Wire Serial), time/date format (Binary), supply voltage range (2.7V ~ 3.3V), battery voltage (1.3V ~ 3.63V), operating temperature (-40°C ~ 85°C), and 8-SOIC package configuration must all remain constant.

Q: Is the trickle-charger feature present in both versions?

A: Yes. Both DS1672S-3 and DS1672S-3+ include integrated trickle-charger functionality.