DS1501YN+ Equivalent & Substitute Parts

Part Overview

The DS1501YN+ is a Real Time Clock (RTC) IC with integrated Clock/Calendar functionality, manufactured by Analog Devices Inc./Maxim Integrated. This 28-DIP parallel interface device provides 256 bytes of NVSRAM with comprehensive timekeeping features including alarm, leap year compensation, square wave output, and watchdog timer capabilities. The part is classified as "Not For New Designs," indicating it has reached end-of-life status. Finding equivalent substitute parts is necessary for legacy system maintenance, repair operations, and applications where continued supply of the original component is unavailable.

Substiute Parts

DS1501YN+

Analog Devices Inc./Maxim IntegratedIn Stock: 1212DS1501YN+ Datasheet

Current PartRFQ

DS1501YN+

Analog Devices Inc./Maxim IntegratedIn Stock: 1212DS1501YN+ Datasheet

DirectRFQ

M48T18-150PC1

STMicroelectronicsIn Stock: 1310M48T18-150PC1 Datasheet

MFR RecommendedRFQ

M48T35AV-10PC1

STMicroelectronicsIn Stock: 1390M48T35AV-10PC1 Datasheet

MFR RecommendedRFQ

M48T35Y-70PC1

STMicroelectronicsIn Stock: 3110M48T35Y-70PC1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DS1501YN+ is determined by the following critical parameters:

Primary Compatibility Criteria:

• Package / Case: 28-DIP (0.600", 15.24mm) form factor
• Mounting Type: Through Hole
• Interface: Parallel
• Time Format: HH:MM:SS (24 hr)
• Date Format: YY-MM-DD-dd
• RoHS Status: ROHS3 Compliant

Secondary Compatibility Considerations:

• Voltage - Supply range compatibility
• Operating Temperature range
• Current consumption specifications
• Regulatory compliance (REACH, ECCN)

The substitute parts identified (M48T18-150PC1, M48T35Y-70PC1, M48T35AV-10PC1) share the identical 28-DIP package, parallel interface, and time/date format specifications. However, variations exist in supply voltage ranges, operating temperature limits, and current consumption, which must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

M48T18-150PC1 (STMicroelectronics Timekeeper® Series)

• Active product status ensures continued availability and manufacturing support
• Identical 4.5V ~ 5.5V supply voltage range matches DS1501YN+ requirements
• Reduced current consumption (3mA vs. 5mA) provides power efficiency advantage
• Operating temperature range 0°C ~ 70°C is narrower than original; suitable for commercial/industrial applications within this range
• ROHS3 and REACH compliant; equivalent regulatory standing

M48T35Y-70PC1 (STMicroelectronics Timekeeper® Series)

• Active product status with established supply chain
• Identical 4.5V ~ 5.5V supply voltage range
• Lowest current consumption (2mA @ 4.75V ~ 5.5V) among 5V-rated substitutes
• Operating temperature range 0°C ~ 70°C; not suitable for extended temperature applications below 0°C or above 70°C
• ROHS3 and REACH compliant

M48T35AV-10PC1 (STMicroelectronics Timekeeper® Series)

• Active product status with ongoing manufacturer support
• Supply voltage range 3V ~ 3.6V differs from DS1501YN+ (4.5V ~ 5.5V); requires circuit redesign for voltage compatibility
• Lowest current consumption (2mA @ 3V ~ 3.6V) for low-voltage applications
• Operating temperature range 0°C ~ 70°C
• ROHS3 and REACH compliant; suitable only for 3V system architectures

Frequently Asked Questions (FAQ)

Q: Can M48T35AV-10PC1 be used as a direct replacement for DS1501YN+ without circuit modifications?

A: No. The M48T35AV-10PC1 operates at 3V ~ 3.6V supply voltage, while the DS1501YN+ requires 4.5V ~ 5.5V. Direct substitution would result in device malfunction or failure. Circuit redesign is necessary to accommodate the different voltage requirement.

Q: Which substitute part is most compatible with the original DS1501YN+ specifications?

A: M48T18-150PC1 provides the closest electrical compatibility, maintaining the identical 4.5V ~ 5.5V supply voltage range and parallel interface. The primary difference is the narrower operating temperature range (0°C ~ 70°C vs. -40°C ~ 85°C).

Q: Are all substitute parts available in the same 28-DIP package?

A: Yes. All substitute parts use the 28-DIP (0.600", 15.24mm) through-hole package, ensuring mechanical compatibility with existing PCB layouts and socket configurations.

Q: What is the significance of the "Not For New Designs" status on the DS1501YN+?

A: This designation indicates the part has reached end-of-life and is no longer recommended for new product development. All identified substitute parts carry "Active" status, indicating current manufacturing and long-term availability.

Q: Do the substitute parts support the same timekeeping features as the DS1501YN+?

A: All substitute parts support HH:MM:SS (24 hr) time format and YY-MM-DD-dd date format. However, feature sets vary: M48T18-150PC1 includes Leap Year and Watchdog Timer; M48T35Y-70PC1 and M48T35AV-10PC1 include Leap Year only. The DS1501YN+ includes additional features (Alarm, NVSRAM, Square Wave Output, Watchdog Timer, Y2K).

Q: What are the compliance certifications for substitute parts?

A: All substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory status of the original DS1501YN+.