DS1673E-5+ Real Time Clock IC Equivalent & Substitute Parts

Part Overview

The DS1673E-5+ is a Real Time Clock (RTC) Portable System Controller IC manufactured by Analog Devices Inc./Maxim Integrated. This surface-mount component integrates timekeeping, alarm, leap year compensation, and watchdog timer functionality in a 20-TSSOP package. The device operates with a primary supply voltage of 4.5V to 5.5V and maintains timekeeping on a battery supply of 2.5V to 3.7V. As an active product with ROHS3 compliance and unlimited moisture sensitivity rating, the DS1673E-5+ serves critical timekeeping and system control functions in portable and embedded applications. Equivalent parts are identified based on matching electrical specifications, interface protocols, package geometry, and operational parameters.

Substiute Parts

DS1673E-5+

Analog Devices Inc./Maxim IntegratedIn Stock: 1431DS1673E-5+ Datasheet

Current PartRFQ

DS1673E-5+

Analog Devices Inc./Maxim IntegratedIn Stock: 1431DS1673E-5+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the DS1673E-5+ is determined by strict equivalence across the following critical parameters:

Interface Compatibility: The 3-Wire Serial interface is the primary communication protocol. Substitute parts must support identical serial communication architecture to ensure firmware and hardware compatibility without redesign.

Package Geometry: The 20-TSSOP (0.173", 4.40mm Width) package defines the physical footprint and pin configuration. Substitutes must match this exact package specification to maintain PCB layout compatibility and prevent rework.

Electrical Specifications: Supply voltage range (4.5V ~ 5.5V primary, 2.5V ~ 3.7V battery), timekeeping current consumption (300µA @ 5V maximum), and operating temperature range (0°C ~ 70°C) establish the functional operating envelope. Substitutes must meet or exceed these specifications.

Functional Features: Alarm capability, leap year compensation, and watchdog timer functionality are core to system controller operation. Substitutes must provide equivalent feature sets.

Compliance & Status: Active product status and ROHS3 compliance ensure regulatory alignment and supply chain continuity. Substitutes must maintain equivalent compliance certifications.

Based on the provided input data, the DS1673E-5+ is listed as its own direct equivalent with no additional substitute parts specified.

Parameter Comparison

Engineering Selection Recommendations

The DS1673E-5+ maintains active product status with full ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), ensuring long-term supply chain availability and regulatory alignment for industrial and commercial applications. The device is suitable for direct selection in new designs and existing production environments.

When sourcing equivalent components, verify that substitute parts maintain identical compliance certifications (ROHS3, REACH Unaffected status) and product status (Active). The 20-TSSOP package geometry and 3-Wire Serial interface are non-negotiable requirements for PCB compatibility and firmware integration.

Current availability of 1419 pieces in new original stock supports immediate procurement for production requirements.

Frequently Asked Questions (FAQ)

Q: Can I substitute the DS1673E-5+ with a different RTC IC from another manufacturer?

A: Substitution requires exact equivalence across package geometry (20-TSSOP), interface protocol (3-Wire Serial), electrical specifications (4.5V ~ 5.5V supply, 2.5V ~ 3.7V battery), and functional features (Alarm, Leap Year, Watchdog Timer). Only parts meeting all these criteria are direct substitutes. Alternative RTC ICs with different packages or interfaces require PCB redesign and firmware modification.

Q: What does the 20-TSSOP package specification mean for PCB layout?

A: The 20-TSSOP (Thin Shrink Small Outline Package) with 0.173" width and 4.40mm body width defines the physical footprint, pin pitch, and lead configuration. Substitute parts must use the identical package to fit existing PCB layouts without rework or redesign.

Q: Is the DS1673E-5+ suitable for battery-backed timekeeping applications?

A: Yes. The device supports battery supply voltage of 2.5V ~ 3.7V for continuous timekeeping during main power loss. The 300µA maximum timekeeping current at 5V primary supply enables extended battery life in portable and embedded systems.

Q: What compliance certifications should I verify when sourcing equivalent parts?

A: Verify ROHS3 compliance and REACH Unaffected status. The DS1673E-5+ meets these certifications. Substitute parts must maintain equivalent compliance to ensure regulatory alignment and supply chain continuity.

Q: Does the DS1673E-5+ support both 12-hour and 24-hour time formats?

A: Yes. The device supports both HH:MM:SS 12-hour and 24-hour time formats, providing flexibility for different application requirements and regional standards.