DS1500YN Equivalent & Substitute Parts

Part Overview

The DS1500YN is a Real Time Clock (RTC) IC with integrated Clock/Calendar functionality, manufactured by Analog Devices Inc./Maxim Integrated. This 32-DIP parallel interface module provides 256 bytes of NVSRAM, alarm capability, leap year compensation, and Y2K support. The device operates from a 4.5V to 5.5V primary supply with battery backup capability (2.5V to 3.7V), making it suitable for applications requiring persistent timekeeping across power cycles.

The DS1500YN is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure component availability for production, and support long-term system maintenance where original inventory is depleted.

Substiute Parts

DS1500YN

Analog Devices Inc./Maxim IntegratedIn Stock: 1039DS1500YN Datasheet

Current PartRFQ

M48T02-70PC1

STMicroelectronicsIn Stock: 1276M48T02-70PC1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DS1500YN is determined by the following critical parameters:

Interface Compatibility: The parallel interface is mandatory for direct substitution. The DS1500YN uses a parallel data bus architecture; any substitute must maintain this interface type.

Package Compatibility: The 32-DIP Module (0.600", 15.24mm) form factor defines the physical footprint. Substitutes must accommodate through-hole mounting on existing PCB layouts.

Functional Requirements: Clock/Calendar functionality with parallel interface, 24-hour time format, and YY-MM-DD-dd date format are core requirements.

Electrical Specifications: Primary supply voltage range (4.5V ~ 5.5V) and battery backup capability (2.5V ~ 3.7V) establish the power domain constraints.

Temperature Range: Operating temperature of -40°C ~ 85°C defines the thermal operating envelope.

The identified substitute M48T02-70PC1 (STMicroelectronics) shares the parallel interface, through-hole mounting type, and compatible time/date formats. However, critical differences exist in package pin count (24-DIP vs. 32-DIP), operating temperature range (0°C ~ 70°C vs. -40°C ~ 85°C), and memory configuration, which must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The DS1500YN is obsolete, while M48T02-70PC1 is actively manufactured by STMicroelectronics. For new designs or long-term production support, M48T02-70PC1 provides assured component availability and ongoing manufacturer support.

Compliance Status: M48T02-70PC1 is ROHS3 compliant, whereas DS1500YN is RoHS non-compliant. Applications subject to RoHS regulations or environmental compliance requirements should prioritize M48T02-70PC1.

Temperature Range Limitation: M48T02-70PC1 operates within 0°C to 70°C, compared to DS1500YN's -40°C to 85°C range. Applications requiring extended temperature operation below 0°C or above 70°C cannot use M48T02-70PC1 as a direct substitute.

Package Pin Count Difference: The 24-DIP package of M48T02-70PC1 differs from the 32-DIP package of DS1500YN. PCB layout modifications and pin mapping verification are required before substitution.

Electrical Specifications: M48T02-70PC1 has a narrower primary supply voltage lower bound (4.75V vs. 4.5V) and lower timekeeping current consumption (3mA vs. 5mA). Verify that system power supply specifications accommodate the 4.75V minimum requirement.

Frequently Asked Questions (FAQ)

Q: Can M48T02-70PC1 directly replace DS1500YN on existing PCBs?

A: No. The 24-DIP package of M48T02-70PC1 has fewer pins than the 32-DIP package of DS1500YN. PCB layout modification is required, including socket redesign or custom adapter implementation. Pin function mapping must be verified against both datasheets before implementation.

Q: What is the primary reason DS1500YN requires substitution?

A: DS1500YN is classified as obsolete. Component availability from original inventory sources is limited. M48T02-70PC1, actively manufactured by STMicroelectronics, provides assured long-term supply for production and maintenance applications.

Q: Are there temperature-related constraints when substituting M48T02-70PC1 for DS1500YN?

A: Yes. M48T02-70PC1 operates within 0°C to 70°C, while DS1500YN supports -40°C to 85°C. Applications requiring operation below 0°C or above 70°C cannot use M48T02-70PC1. Verify application temperature requirements before substitution.

Q: Does M48T02-70PC1 meet modern compliance standards?

A: Yes. M48T02-70PC1 is ROHS3 compliant and REACH unaffected. DS1500YN is RoHS non-compliant. For applications subject to environmental or regulatory compliance requirements, M48T02-70PC1 is the appropriate choice.

Q: What are the electrical differences between these parts?

A: M48T02-70PC1 has a primary supply voltage range of 4.75V to 5.5V (vs. 4.5V to 5.5V for DS1500YN) and lower timekeeping current consumption of 3mA at 4.7V to 5.5V (vs. 5mA for DS1500YN). Verify system power supply specifications meet the 4.75V minimum requirement.

Q: Are the time and date formats compatible between these parts?

A: Yes. Both DS1500YN and M48T02-70PC1 support HH:MM:SS (24-hour) time format and YY-MM-DD-dd date format, ensuring functional compatibility for timekeeping applications.