DS1693+ Equivalent & Substitute Parts

Part Overview

The DS1693+ is a Real Time Clock (RTC) IC with integrated Clock/Calendar functionality and 114 bytes of NVSRAM, manufactured by Analog Devices Inc./Maxim Integrated. This device operates in parallel interface mode with dual supply voltage ranges (2.7V–3.3V and 4.5V–5.5V) and is packaged in a 28-DIP module format. The DS1693+ is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing system support.

Substiute Parts

DS1693+

Analog Devices Inc./Maxim IntegratedIn Stock: 1086DS1693+ Datasheet

Current PartRFQ

BQ4802LYDWR

Texas InstrumentsIn Stock: 3828BQ4802LYDWR Datasheet

MFR RecommendedRFQ

M48T58-70PC1

STMicroelectronicsIn Stock: 1546M48T58-70PC1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DS1693+ is determined by the following critical parameters:

• Interface Type: Parallel interface is mandatory for direct functional replacement
• Time/Date Format: Both 12/24-hour and YY-MM-DD-dd format support required
• Operating Temperature Range: 0°C–70°C minimum
• Supply Voltage Compatibility: Devices must operate within the specified voltage ranges
• RoHS Compliance: ROHS3 compliance required for regulatory alignment

Two substitute parts are identified:

1. BQ4802LYDWR (Texas Instruments): Active product with parallel interface, matching time/date formats, and compatible voltage ranges. Packaging differs (28-SOIC surface mount vs. 28-DIP through hole).

2. M48T58-70PC1 (STMicroelectronics): Active product with parallel interface and matching package format (28-DIP through hole). Time format limited to 24-hour operation; date format matches.

Parameter Comparison

Engineering Selection Recommendations

For Direct Package Compatibility (Through Hole, 28-DIP): M48T58-70PC1 maintains identical package format and mounting type. This substitute is suitable for applications where PCB layout modifications are not feasible. Note that supply voltage is limited to 4.75V–5.5V, and time format is restricted to 24-hour operation.

For Active Product Status with Full Feature Parity: BQ4802LYDWR is an active product from Texas Instruments with complete time/date format support (12/24-hour operation) and dual supply voltage ranges matching the original specification. This substitute requires PCB redesign due to surface mount packaging (28-SOIC). The lower timekeeping current (1.5mA typical) provides improved power efficiency.

Both substitutes maintain ROHS3 compliance and operate within the 0°C–70°C temperature range specified for the DS1693+.

Frequently Asked Questions (FAQ)

Q: Can BQ4802LYDWR replace DS1693+ without PCB modification? A: No. BQ4802LYDWR uses 28-SOIC surface mount packaging, while DS1693+ uses 28-DIP through hole packaging. PCB redesign is required.

Q: Does M48T58-70PC1 support 12-hour time format? A: No. M48T58-70PC1 operates in 24-hour time format only. If 12-hour format is required, BQ4802LYDWR must be used.

Q: Are both substitutes compatible with 2.7V supply voltage? A: BQ4802LYDWR supports 2.7V–3.6V operation. M48T58-70PC1 requires 4.75V–5.5V and is not compatible with 2.7V supply.

Q: What is the primary difference in timekeeping current consumption? A: DS1693+ draws 2mA @ 3V or 3mA @ 5V. BQ4802LYDWR draws 1.5mA typical across its supply range, offering lower power consumption.

Q: Are all three parts RoHS compliant? A: Yes. DS1693+, BQ4802LYDWR, and M48T58-70PC1 are all ROHS3 compliant.