DS1321S/T&R Equivalent & Substitute Parts

Part Overview

The DS1321S/T&R is a nonvolatile RAM controller with integrated battery monitoring functionality, designed for 5V supply applications. Manufactured by Analog Devices Inc./Maxim Integrated, this component operates across the industrial temperature range of -40°C to 85°C and is housed in a 16-SOIC surface mount package.

The DS1321S/T&R carries an Obsolete product status. Identifying equivalent substitute parts is essential for ongoing system support, design continuity, and procurement planning when original inventory becomes unavailable.

Substiute Parts

DS1321S/T&R

Analog Devices Inc./Maxim IntegratedIn Stock: 1135DS1321S/T&R Datasheet

Current PartRFQ

DS1321S+T&R

Analog Devices Inc./Maxim IntegratedIn Stock: 1179DS1321S+T&R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DS1321S/T&R is determined by the following critical parameters:

• Controller Type: Must be Nonvolatile RAM
• Voltage - Supply: Must operate within 4.75V ~ 5.5V range
• Operating Temperature: Must support -40°C ~ 85°C
• Mounting Type: Must be Surface Mount
• Package / Case: Must be 16-SOIC (0.154", 3.90mm Width)
• Base Product Number: DS1321 series compatibility
• Compliance: RoHS3 Compliant, REACH Unaffected

The DS1321S+T&R qualifies as a direct substitute based on identical electrical specifications, package configuration, and compliance certifications. The primary distinction is packaging format: the substitute is supplied in Tape & Reel (TR) configuration versus the original's standard packaging.

Parameter Comparison

Engineering Selection Recommendations

The DS1321S+T&R is a direct functional equivalent to the DS1321S/T&R. Both components share identical electrical specifications, thermal operating range, and package geometry. The substitute maintains full RoHS3 compliance and REACH compliance status.

The primary distinction is product status: the original part is Obsolete, while the substitute is Active. This status difference reflects manufacturing availability and supply chain continuity. The DS1321S+T&R is supplied in Tape & Reel format, which is standard for high-volume production environments and automated assembly processes.

Selection of the DS1321S+T&R is appropriate for applications requiring continued component availability and supply chain reliability. Electrical and mechanical compatibility is assured across all specified parameters.

Frequently Asked Questions (FAQ)

Q: Are the DS1321S/T&R and DS1321S+T&R electrically identical?

A: Yes. Both components are nonvolatile RAM controllers with battery monitoring, operating at 4.75V ~ 5.5V, across -40°C ~ 85°C, in 16-SOIC packages. Electrical specifications are identical.

Q: What is the difference between these two part numbers?

A: The primary difference is packaging format. The DS1321S+T&R is supplied in Tape & Reel (TR) configuration, while the DS1321S/T&R uses standard packaging. Additionally, the substitute carries Active product status versus Obsolete status for the original.

Q: Can the DS1321S+T&R be used as a direct replacement in existing designs?

A: Yes. The 16-SOIC package dimensions, pin configuration, and electrical characteristics are identical. No design modifications are required for PCB layout or schematic implementation.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the DS1321S/T&R and DS1321S+T&R are RoHS3 Compliant and REACH Unaffected.

Q: Why is the original part marked as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The DS1321S+T&R, with Active status, represents the current available equivalent from the same manufacturer.

Q: Does Tape & Reel packaging affect circuit performance?

A: No. Tape & Reel is a supply format for automated assembly. The component itself is identical. Performance, reliability, and electrical characteristics remain unchanged.