DS1670E+ Equivalent & Substitute Parts

Part Overview

The DS1670E+ is a Real Time Clock (RTC) IC Portable System Controller manufactured by Analog Devices Inc./Maxim Integrated. This surface-mount device operates as a 3-wire serial interface controller with integrated timekeeping, alarm, leap year, and watchdog timer functionality. The DS1670E+ is classified as Active product status with full RoHS3 compliance and REACH unaffected designation. Alternative equivalent parts are identified based on matching electrical specifications, mechanical packaging, and functional feature sets to ensure direct substitution capability in portable system applications.

Substiute Parts

DS1670E+

Analog Devices Inc./Maxim IntegratedIn Stock: 1526DS1670E+ Datasheet

Current PartRFQ

DS1670E+

Analog Devices Inc./Maxim IntegratedIn Stock: 1526DS1670E+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the DS1670E+ is determined by strict equivalence across the following critical parameters:

• Package / Case: 20-TSSOP (0.173", 4.40mm Width) — mechanical compatibility with PCB footprint
• Interface: 3-Wire Serial — functional protocol compatibility
• Voltage - Supply: 2.97V ~ 3.63V — power supply compatibility
• Voltage - Supply, Battery: 2.5V ~ 3.7V — backup power compatibility
• Current - Timekeeping (Max): 100µA @ 3.3V — power consumption specification
• Operating Temperature: 0°C ~ 70°C — thermal operating range
• Features: Alarm, Leap Year, Watchdog Timer — functional feature set
• Time Format: HH:MM:SS (12/24 hr) — time representation compatibility
• Date Format: YY-MM-DD-dd — date representation compatibility
• RoHS Status: ROHS3 Compliant — regulatory compliance requirement

Only parts matching all specified parameters across electrical, mechanical, and functional criteria qualify as direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

The DS1670E+ maintains Active product status with full RoHS3 compliance and REACH unaffected regulatory standing. Component selection should prioritize parts with identical Active status and matching compliance certifications to ensure long-term supply chain stability and regulatory alignment. The 20-TSSOP package format and 3-wire serial interface are fixed requirements for PCB integration and firmware compatibility. Supply voltage and battery backup voltage ranges must match exactly to prevent circuit malfunction or component damage. Timekeeping current specification and operating temperature range are critical for portable system power budget and thermal design validation.

Frequently Asked Questions (FAQ)

Q: Can the DS1670E+ be substituted with a different RTC controller from another manufacturer?

A: Substitution is limited to parts matching all specified parameters: 20-TSSOP package, 3-wire serial interface, 2.97V–3.63V supply voltage, 2.5V–3.7V battery voltage, 100µA timekeeping current, 0°C–70°C operating temperature, and identical feature set (Alarm, Leap Year, Watchdog Timer). Parts from different manufacturers or with different package formats are not direct substitutes.

Q: What is the significance of the 20-TSSOP package specification?

A: The 20-TSSOP (Thin Shrink Small Outline Package) with 0.173" width and 4.40mm body dimension defines the physical footprint and pin configuration. PCB layout and solder reflow profiles are designed for this specific package. Substitution with different package types requires PCB redesign and is not a direct equivalent.

Q: Are there any functional differences between the DS1670E+ and its substitutes?

A: Direct substitutes must provide identical functionality: 12/24-hour time format, YY-MM-DD-dd date format, alarm capability, leap year compensation, and watchdog timer operation. Any deviation in these features disqualifies a part from direct substitution status.

Q: What compliance certifications must be verified for substitution?

A: Substitute parts must maintain ROHS3 compliance and REACH unaffected status. These certifications ensure regulatory compliance in target markets and supply chain continuity. Parts with different compliance designations are not acceptable substitutes.

Q: How does the 3-wire serial interface affect substitution compatibility?

A: The 3-wire serial protocol is the communication standard between the RTC controller and the host system. Firmware and circuit design are optimized for this interface. Parts with different serial protocols (I2C, SPI, parallel) require firmware modification and circuit redesign, disqualifying them as direct substitutes.