DS1672S-2 Real Time Clock IC Equivalent & Substitute Parts

Part Overview

The DS1672S-2 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-2 is currently classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations. The primary substitute maintains identical electrical and mechanical specifications while offering active product status and improved compliance certifications.

Substiute Parts

DS1672S-2

Analog Devices Inc./Maxim IntegratedIn Stock: 922DS1672S-2 Datasheet

Current PartRFQ

DS1672S-2+

Analog Devices Inc./Maxim IntegratedIn Stock: 899DS1672S-2+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DS1672S-2 is determined by strict equivalence across the following critical parameters:

Electrical Compatibility Requirements:

• Interface protocol: I2C, 2-Wire Serial
• Time and date format: Binary
• Supply voltage range: 1.8V ~ 2.2V
• Battery supply voltage range: 1.3V ~ 3.63V
• Timekeeping current specification: 500µA @ 2.2V
• Operating temperature range: -40°C ~ 85°C

Mechanical Compatibility Requirements:

• Package type: 8-SOIC (0.154", 3.90mm Width)
• Mounting type: Surface Mount
• Moisture Sensitivity Level: 1 (Unlimited)

Functional Requirements:

• RTC Binary Counter functionality
• Trickle-Charger feature

The DS1672S-2+ qualifies as a direct substitute because it maintains complete electrical and mechanical equivalence across all specified parameters while offering improved product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The DS1672S-2+ is the appropriate substitute for the obsolete DS1672S-2. Both parts are manufactured by Analog Devices Inc./Maxim Integrated and maintain complete electrical and mechanical equivalence. The DS1672S-2+ offers the following advantages:

Product Status: The DS1672S-2+ carries Active product status, ensuring continued availability and manufacturer support, whereas the DS1672S-2 is classified as Obsolete.

Compliance Certifications: The DS1672S-2+ is ROHS3 Compliant, providing enhanced environmental compliance compared to the RoHS non-compliant DS1672S-2. Both parts maintain REACH Unaffected status.

Packaging: The DS1672S-2+ is supplied in Tube packaging, facilitating standard component handling and inventory management.

For applications currently using the DS1672S-2, direct replacement with the DS1672S-2+ requires no circuit modifications, firmware changes, or design alterations due to complete functional and electrical equivalence.

Frequently Asked Questions (FAQ)

Q: Can the DS1672S-2+ be used as a direct replacement for the DS1672S-2 in existing designs?

A: Yes. The DS1672S-2+ maintains complete electrical and mechanical equivalence to the DS1672S-2. No circuit modifications, PCB layout changes, or firmware updates are required for substitution.

Q: What are the key differences between the DS1672S-2 and DS1672S-2+?

A: The primary differences are product status (Obsolete vs. Active), RoHS compliance (non-compliant vs. ROHS3 Compliant), and packaging format (unspecified vs. Tube). All electrical specifications, interface protocols, and functional characteristics remain identical.

Q: Are there any compatibility concerns with the 8-SOIC package?

A: No. Both parts use the identical 8-SOIC (0.154", 3.90mm Width) surface mount package. PCB footprints, solder reflow profiles, and assembly processes are fully compatible.

Q: What is the significance of the Trickle-Charger feature?

A: The Trickle-Charger feature enables battery charging during normal operation, maintaining backup power for timekeeping functionality during supply interruptions. This feature is present in both the main part and substitute.

Q: Does the DS1672S-2+ support the same I2C communication protocol?

A: Yes. Both parts implement identical I2C 2-Wire Serial interface specifications, including address schemes, command structures, and data formats. Existing firmware and software drivers require no modification.

Q: What is the operating temperature range for both parts?

A: Both the DS1672S-2 and DS1672S-2+ operate across the temperature range of -40°C to 85°C, suitable for industrial and commercial applications.