DS1672S-33 Equivalent & Substitute Parts

Part Overview

The DS1672S-33 is a Real Time Clock (RTC) IC Binary Counter with I2C interface manufactured by Analog Devices Inc./Maxim Integrated. This component provides timekeeping functionality in a compact 8-SOIC surface mount package with integrated trickle-charger capability. The DS1672S-33 is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The DS1672S-33+ serves as the direct active equivalent, offering identical electrical and mechanical specifications with improved compliance status.

Substiute Parts

DS1672S-33

Analog Devices Inc./Maxim IntegratedIn Stock: 4137DS1672S-33 Datasheet

Current PartRFQ

DS1672S-33+

Analog Devices Inc./Maxim IntegratedIn Stock: 1639DS1672S-33+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The DS1672S-33+ qualifies as a direct substitute based on the following critical parameters:

• Electrical Compatibility: Identical supply voltage range (2.97V ~ 3.63V), battery voltage range (1.3V ~ 3.63V), and timekeeping current specification (500µA @ 3.63V)
• Functional Equivalence: Same interface protocol (I2C, 2-Wire Serial), identical time and date format (Binary), and matching feature set (Trickle-Charger)
• Mechanical Compatibility: Identical package type (8-SOIC, 0.154", 3.90mm Width) and mounting method (Surface Mount)
• Operating Range: Matching temperature range (-40°C ~ 85°C)
• Base Product Number: Both parts share the DS1672 base product number, confirming functional equivalence

The primary distinction between DS1672S-33 and DS1672S-33+ is product status and compliance certification, not electrical or mechanical performance.

Parameter Comparison

Engineering Selection Recommendations

The DS1672S-33+ is the recommended substitute for the obsolete DS1672S-33. Both parts are electrically and mechanically identical, with all critical parameters matching across supply voltage, battery voltage, current consumption, operating temperature, and package specifications.

The DS1672S-33+ offers the following advantages:

• Active Product Status: Currently manufactured and supported by Analog Devices Inc./Maxim Integrated, ensuring long-term availability and supply chain reliability
• Regulatory Compliance: ROHS3 compliant, meeting current environmental and regulatory requirements, whereas the DS1672S-33 is RoHS non-compliant
• Direct Pin Compatibility: Identical 8-SOIC package enables direct PCB substitution without layout modifications
• Functional Equivalence: No firmware, software, or circuit design changes required

For applications currently using DS1672S-33, transition to DS1672S-33+ is straightforward and does not require design revision.

Frequently Asked Questions (FAQ)

Q: Can DS1672S-33+ be used as a direct replacement for DS1672S-33 on existing PCBs?

A: Yes. The DS1672S-33+ is pin-compatible and functionally equivalent. No PCB modifications are required. Both parts use the identical 8-SOIC package with matching pinout and electrical specifications.

Q: What is the primary reason to substitute DS1672S-33 with DS1672S-33+?

A: The DS1672S-33 is obsolete and no longer manufactured. The DS1672S-33+ is the active equivalent from the same manufacturer, providing identical functionality with current production support and ROHS3 compliance.

Q: Are there any electrical performance differences between these parts?

A: No. Both parts have identical supply voltage ranges (2.97V ~ 3.63V), battery voltage ranges (1.3V ~ 3.63V), timekeeping current specifications (500µA @ 3.63V), and operating temperature ranges (-40°C ~ 85°C).

Q: Do both parts support the same I2C interface and data formats?

A: Yes. Both DS1672S-33 and DS1672S-33+ use I2C 2-Wire Serial interface with Binary time and date formats. No software or firmware modifications are necessary.

Q: What is the difference in RoHS compliance between these parts?

A: DS1672S-33 is RoHS non-compliant, while DS1672S-33+ is ROHS3 compliant. For new designs or applications subject to environmental regulations, DS1672S-33+ is the appropriate choice.

Q: Are both parts available in the same packaging options?

A: Both parts are supplied in 8-SOIC surface mount packages. The DS1672S-33+ is available in Tube packaging, while the DS1672S-33 packaging specification was not provided in the component data.