DS17887-3-IND Equivalent & Substitute Parts

Part Overview

The DS17887-3-IND is a Real Time Clock (RTC) IC with integrated Clock/Calendar functionality, manufactured by Analog Devices Inc./Maxim Integrated. This 24-DIP through-hole module provides 8KB of parallel-accessible memory with alarm, daylight savings, leap year, and NVSRAM capabilities. The part is currently classified as obsolete, making equivalent and substitute components necessary for ongoing system support and new design implementations.

Substiute Parts

DS17887-3-IND

Analog Devices Inc./Maxim IntegratedIn Stock: 25502DS17887-3-IND Datasheet

Current PartRFQ

DS17887-3+

Analog Devices Inc./Maxim IntegratedIn Stock: 1362DS17887-3+ Datasheet

MFR RecommendedRFQ

BQ3285S-SB2

Texas InstrumentsIn Stock: 1987BQ3285S-SB2 Datasheet

MFR RecommendedRFQ

DP8573AVX/NOPB

National SemiconductorIn Stock: 1484DP8573AVX/NOPB Datasheet

MFR RecommendedRFQ

M48T35AV-10PC1

STMicroelectronicsIn Stock: 1390M48T35AV-10PC1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the DS17887-3-IND is determined by the following critical parameters:

• Functional Type: Real Time Clock with Clock/Calendar capability
• Interface: Parallel data access
• Memory Architecture: NVSRAM with battery backup
• Time/Date Format: HH:MM:SS (12/24 hr) and YY-MM-DD-dd
• Core Features: Alarm, Daylight Savings, Leap Year support
• Mounting Technology: Through-hole or surface-mount compatibility
• Supply Voltage Range: Operating and battery supply specifications
• Temperature Range: Operating temperature envelope

The substitute parts listed below maintain functional equivalence within the RTC Clock/Calendar category while accommodating variations in package type, voltage specifications, and product status.

Parameter Comparison

Engineering Selection Recommendations

DS17887-3+ (Primary Substitute)

The DS17887-3+ is the direct functional equivalent of the DS17887-3-IND. It maintains identical package geometry (24-DIP), memory capacity (8KB), voltage specifications (2.7V ~ 3.7V), and feature set. The primary distinction is product status: DS17887-3+ is active and ROHS3 compliant, addressing obsolescence and regulatory requirements. Operating temperature range is narrower (0°C ~ 70°C versus -40°C ~ 85°C), requiring verification for extended temperature applications.

BQ3285S-SB2 (Surface-Mount Alternative)

The BQ3285S-SB2 provides functional RTC Clock/Calendar capability with parallel interface and equivalent feature set. This Texas Instruments component uses surface-mount 24-SOIC packaging, suitable for modern PCB designs. Supply voltage differs (4.5V ~ 5.5V), requiring circuit redesign for low-voltage applications. Memory capacity is reduced to 114B. Recommended for new designs prioritizing surface-mount technology.

DP8573AVX/NOPB (Extended Temperature Alternative)

The DP8573AVX/NOPB maintains the extended operating temperature range (-40°C ~ 85°C) of the original part. This National Semiconductor component uses 28-LCC surface-mount packaging. Supply voltage is 4.5V ~ 5.5V. Feature set is limited (Alarm, Leap Year only). Recommended for applications requiring extended temperature operation with surface-mount compatibility.

M48T35AV-10PC1 (Through-Hole Alternative)

The M48T35AV-10PC1 is a STMicroelectronics Timekeeper® series component in 28-DIP through-hole packaging. Supply voltage is 3V ~ 3.6V. Feature set includes Leap Year support. Time format is 24-hour only. Recommended for through-hole designs with 3V supply requirements.

Frequently Asked Questions (FAQ)

Q: Can DS17887-3+ be used as a direct replacement for DS17887-3-IND?

A: Yes, DS17887-3+ is functionally equivalent with identical package, memory, voltage, and feature specifications. The operating temperature range is narrower (0°C ~ 70°C). Verify temperature requirements before substitution.

Q: What are the key differences between through-hole and surface-mount RTC options?

A: Through-hole packages (DS17887-3+, M48T35AV-10PC1) mount vertically through PCB holes, suitable for legacy designs and manual assembly. Surface-mount packages (BQ3285S-SB2, DP8573AVX/NOPB) mount flat on PCB surfaces, enabling higher density and automated assembly. Package selection depends on PCB design and manufacturing capability.

Q: Does BQ3285S-SB2 require circuit modifications for voltage compatibility?

A: Yes. BQ3285S-SB2 operates at 4.5V ~ 5.5V supply voltage, while DS17887-3-IND operates at 2.7V ~ 3.7V. Circuit redesign is required to accommodate the higher voltage specification.

Q: Which substitute maintains the full -40°C ~ 85°C operating temperature range?

A: DP8573AVX/NOPB maintains the extended temperature range. DS17887-3+, BQ3285S-SB2, and M48T35AV-10PC1 are limited to 0°C ~ 70°C.

Q: Are all substitute parts RoHS compliant?

A: DS17887-3+, BQ3285S-SB2, and M48T35AV-10PC1 are ROHS3 compliant. DP8573AVX/NOPB RoHS status is not specified in available documentation.

Q: What is the memory capacity difference between substitutes?

A: DS17887-3+ maintains 8KB memory. BQ3285S-SB2 provides 114B. DP8573AVX/NOPB and M48T35AV-10PC1 memory capacity is not specified. Verify memory requirements for application compatibility.

Q: Can M48T35AV-10PC1 support 12-hour time format?

A: No. M48T35AV-10PC1 supports 24-hour time format only. Applications requiring 12-hour format should use DS17887-3+, BQ3285S-SB2, or DP8573AVX/NOPB.