DS1371U Equivalent & Substitute Parts

Part Overview

The DS1371U 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 with integrated alarm, square wave output, and watchdog timer features in an 8-TSSOP/8-MSOP surface mount package.

The DS1371U is classified as obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term production requirements for applications utilizing this RTC timing solution.

Substiute Parts

DS1371U

Analog Devices Inc./Maxim IntegratedIn Stock: 2196DS1371U Datasheet

Current PartRFQ

DS1371U+

Analog Devices Inc./Maxim IntegratedIn Stock: 999116DS1371U+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DS1371U is determined by strict equivalence across the following critical parameters:

Interface Protocol: I2C 2-Wire Serial communication must be maintained for firmware and PCB design compatibility.

Package / Case: 8-TSSOP/8-MSOP (0.118", 3.00mm Width) surface mount package ensures mechanical and thermal compatibility with existing PCB layouts.

Electrical Specifications: Supply voltage range (1.7V ~ 5.5V), timekeeping current (1.3µA @ 1.7V ~ 5.5V), and operating temperature range (-40°C ~ 85°C) must be identical or superior.

Functional Features: Alarm, square wave output, and watchdog timer capabilities must be present.

Time and Date Format: Binary format representation must be maintained for register-level compatibility.

Compliance Standards: RoHS3 compliance and REACH unaffected status ensure regulatory alignment.

Parameter Comparison

Engineering Selection Recommendations

The DS1371U+ is a direct functional equivalent to the DS1371U. Both parts share identical electrical specifications, interface protocols, package geometry, and feature sets. The primary distinction is product status: the DS1371U is obsolete while the DS1371U+ maintains active product status.

For new designs or production continuity, the DS1371U+ is the appropriate selection. Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment across manufacturing environments. The DS1371U+ is supplied in standard tube packaging, supporting standard component handling and assembly processes.

No electrical or mechanical redesign is required when transitioning from DS1371U to DS1371U+. Pin configuration, register architecture, and I2C protocol implementation remain identical.

Frequently Asked Questions (FAQ)

Q: Can DS1371U+ be used as a direct replacement for DS1371U?

A: Yes. The DS1371U+ is electrically and mechanically identical to the DS1371U. All electrical parameters, interface protocols, package dimensions, and functional features are equivalent. No PCB modifications or firmware changes are required.

Q: What is the primary reason to substitute DS1371U with DS1371U+?

A: The DS1371U is classified as obsolete product status. The DS1371U+ maintains active product status, ensuring long-term availability, supply chain reliability, and manufacturer support for production applications.

Q: Are there any differences in package handling or storage requirements?

A: The DS1371U+ is supplied in tube packaging, which is standard for surface mount components. Both parts maintain identical moisture sensitivity level (MSL 1 - Unlimited), indicating no special storage or handling precautions beyond standard ESD protection.

Q: Do both parts support the same I2C communication protocol?

A: Yes. Both DS1371U and DS1371U+ implement identical I2C 2-Wire Serial interface protocols. Register definitions, command structures, and timing specifications are equivalent.

Q: Are there compliance or certification differences between the two parts?

A: No. Both parts maintain identical RoHS3 compliance and REACH unaffected status. No additional compliance documentation or qualification is required when transitioning between these parts.

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

A: Both DS1371U and DS1371U+ operate across -40°C to 85°C. This range is suitable for industrial and commercial applications.

Q: Is the supply voltage range identical for both parts?

A: Yes. Both parts operate across 1.7V to 5.5V supply voltage range with identical timekeeping current specifications (1.3µA maximum at 1.7V ~ 5.5V).