DS1673E-3 Equivalent & Substitute Parts

Part Overview

The DS1673E-3 is a Real Time Clock (RTC) IC Portable System Controller with 3-Wire Serial interface in 20-TSSOP surface mount packaging. This component provides timekeeping functionality with integrated alarm, leap year compensation, and watchdog timer features for portable system applications.

The DS1673E-3 carries an Obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades.

Substiute Parts

DS1673E-3

Analog Devices Inc./Maxim IntegratedIn Stock: 917DS1673E-3 Datasheet

Current PartRFQ

DS1673E-3+

Analog Devices Inc./Maxim IntegratedIn Stock: 1437DS1673E-3+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DS1673E-3 is determined by strict equivalence across the following critical parameters:

• Manufacturer and base product family (DS1673 series)
• Functional type: Portable System Controller RTC
• Interface protocol: 3-Wire Serial
• Package specification: 20-TSSOP (0.173", 4.40mm Width)
• Electrical specifications: Supply voltage 2.7V ~ 3.3V, battery voltage 2.5V ~ 3.7V
• Timekeeping current: 100µA @ 3V maximum
• Operating temperature range: 0°C ~ 70°C
• Time and date format support: HH:MM:SS (12/24 hr) and YY-MM-DD-dd
• Feature set: Alarm, Leap Year, Watchdog Timer

The DS1673E-3+ qualifies as a direct substitute based on identical electrical, mechanical, and functional parameters within the same product family.

Parameter Comparison

Engineering Selection Recommendations

The DS1673E-3+ is the direct equivalent substitute for the DS1673E-3. Both components share identical electrical specifications, functional capabilities, and physical packaging. The primary distinction is product lifecycle status: the DS1673E-3 is obsolete, while the DS1673E-3+ maintains active production status.

The DS1673E-3+ additionally provides ROHS3 compliance, whereas the original DS1673E-3 is RoHS non-compliant. This compliance improvement makes the DS1673E-3+ suitable for applications subject to RoHS regulations.

Both parts maintain REACH Unaffected status and EAR99 export classification. Selection between these parts should be based on component availability, compliance requirements, and supply chain considerations.

Frequently Asked Questions (FAQ)

Q: Can DS1673E-3+ directly replace DS1673E-3 in existing designs?

A: Yes. The DS1673E-3+ is electrically and mechanically identical to the DS1673E-3. Both components feature the same 20-TSSOP package, supply voltage range (2.7V ~ 3.3V), battery voltage range (2.5V ~ 3.7V), timekeeping current specification (100µA @ 3V), and functional feature set (Alarm, Leap Year, Watchdog Timer). No design modifications are required.

Q: What is the difference between DS1673E-3 and DS1673E-3+?

A: The primary differences are product status and regulatory compliance. The DS1673E-3 is obsolete and RoHS non-compliant. The DS1673E-3+ is in active production and ROHS3 compliant. Electrical and functional specifications are identical.

Q: Are there packaging differences between these parts?

A: The DS1673E-3+ is supplied in Tube packaging, while the DS1673E-3 packaging specification is not detailed. Both components use the same 20-TSSOP (0.173", 4.40mm Width) surface mount package case.

Q: Does the RoHS3 compliance of DS1673E-3+ affect circuit performance?

A: No. RoHS3 compliance indicates material composition standards and does not alter electrical performance, operating characteristics, or functional behavior. The component operates identically to the non-compliant version.

Q: What interface protocol does this RTC controller use?

A: Both the DS1673E-3 and DS1673E-3+ use a 3-Wire Serial interface for communication with host systems.

Q: What is the operating temperature range for these components?

A: Both parts operate across 0°C to 70°C. This range applies to normal system operation and does not include battery backup timekeeping mode.