DS1318 Real Time Clock IC Equivalent & Substitute Parts

Part Overview

The DS1318 is a Real Time Clock (RTC) IC Elapsed Time Counter with parallel interface in 24-TSSOP surface mount packaging, manufactured by Analog Devices Inc./Maxim Integrated. This component provides timekeeping functionality with alarm and square wave output capabilities, operating from 3V to 3.6V supply voltage with battery backup support from 1.6V to 3.7V.

The DS1318 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 functionality.

Substiute Parts

DS1318

Analog Devices Inc./Maxim IntegratedIn Stock: 1115DS1318 Datasheet

Current PartRFQ

DS1318E+

Analog Devices Inc./Maxim IntegratedIn Stock: 1709DS1318E+ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DS1318 are identified based on strict electrical and mechanical parameter matching. The primary substitution criteria are:

• Package Compatibility: 24-TSSOP (0.173", 4.40mm Width) surface mount package
• Electrical Specifications: Voltage supply range 3V ~ 3.6V, battery voltage 1.6V ~ 3.7V, timekeeping current 150µA @ 3V ~ 3.6V
• Functional Features: Parallel interface, alarm capability, square wave output, binary time and date format
• Operating Range: -40°C ~ 85°C temperature range
• Compliance: ROHS3 compliant, MSL 1 rating

The DS1318E+ meets all these criteria and is classified as the manufacturer-recommended substitute with active product status.

Parameter Comparison

Engineering Selection Recommendations

The DS1318E+ is the direct substitute for the DS1318. Both components share identical electrical specifications, package geometry, and functional features. The DS1318E+ offers the advantage of active product status, ensuring continued availability and manufacturing support.

For new designs or production continuity, the DS1318E+ is the appropriate selection. Both parts maintain ROHS3 compliance and MSL 1 rating, supporting environmental and reliability requirements. The transition from DS1318 to DS1318E+ requires no circuit modifications, as all electrical and mechanical parameters are equivalent.

Frequently Asked Questions (FAQ)

Q: Can DS1318E+ directly replace DS1318 in existing designs?

A: Yes. The DS1318E+ is electrically and mechanically identical to the DS1318. No circuit modifications are required. Both components operate at 3V ~ 3.6V supply voltage, support 1.6V ~ 3.7V battery backup, and provide identical timekeeping current specifications of 150µA @ 3V ~ 3.6V.

Q: What is the primary difference between DS1318 and DS1318E+?

A: The DS1318 is classified as obsolete, while DS1318E+ maintains active product status. This distinction affects long-term availability and manufacturing support. All functional and electrical parameters remain identical.

Q: Are the package dimensions identical?

A: Yes. Both DS1318 and DS1318E+ use 24-TSSOP (0.173", 4.40mm Width) surface mount packaging. PCB footprints and assembly processes are interchangeable.

Q: Do both parts support the same operating temperature range?

A: Yes. Both components operate across -40°C ~ 85°C, supporting industrial and commercial temperature requirements.

Q: Are there compliance differences between the two parts?

A: No. Both DS1318 and DS1318E+ are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. Environmental and reliability certifications are equivalent.

Q: What packaging options are available for DS1318E+?

A: DS1318E+ is supplied in Tube packaging, suitable for automated assembly and component handling.