DS1306EN/T&R Equivalent & Substitute Parts

Part Overview

The DS1306EN/T&R is a Real Time Clock (RTC) IC with integrated Clock/Calendar functionality, manufactured by Analog Devices Inc./Maxim Integrated. This device provides 96 bytes of NVSRAM (Non-Volatile Static RAM) with SPI interface, supporting 12/24-hour time format and YY-MM-DD-dd date format. The main part number DS1306EN/T&R is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity.

Substiute Parts

DS1306EN/T&R

Analog Devices Inc./Maxim IntegratedIn Stock: 4401DS1306EN/T&R Datasheet

Current PartRFQ

DS1306EN+T&R

Analog Devices Inc./Maxim IntegratedIn Stock: 5174DS1306EN+T&R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DS1306EN/T&R is determined by strict equivalence across the following critical parameters:

• Interface Protocol: SPI (Serial Peripheral Interface)
• Memory Configuration: 96B NVSRAM
• Package Type: 20-TSSOP (0.173", 4.40mm Width)
• Voltage Range: 2V ~ 5.5V supply and battery operation
• Functional Features: Alarm, Leap Year, NVSRAM, Square Wave Output, Trickle-Charger
• Time/Date Format: HH:MM:SS (12/24 hr) and YY-MM-DD-dd
• Operating Temperature Range: -40°C ~ 85°C
• Mounting Type: Surface Mount

The substitute part DS1306EN+T&R maintains identical electrical and mechanical specifications, with the primary distinction being packaging format (Cut Tape & Digi-Reel® versus standard tape and reel) and product status (Active versus Obsolete).

Parameter Comparison

Engineering Selection Recommendations

The DS1306EN+T&R is a direct functional equivalent to the DS1306EN/T&R. Selection between these parts should be based on the following criteria:

Product Status: The DS1306EN/T&R is classified as obsolete, while DS1306EN+T&R maintains active product status. For new designs or long-term procurement requirements, DS1306EN+T&R is the appropriate selection.

Regulatory Compliance: DS1306EN+T&R is ROHS3 compliant, whereas DS1306EN/T&R is RoHS non-compliant. Applications subject to RoHS regulations require DS1306EN+T&R.

Packaging Availability: DS1306EN+T&R is available in Cut Tape (CT) & Digi-Reel® packaging format, providing flexibility for both high-volume and low-volume procurement scenarios. The standard tape and reel format of DS1306EN/T&R may have limited availability due to obsolete status.

Electrical and Mechanical Compatibility: Both parts are electrically and mechanically identical across all specified parameters, including SPI interface, 96B memory, 20-TSSOP package, supply voltage range, and operating temperature range. Direct substitution is supported without circuit modification.

Frequently Asked Questions (FAQ)

Q: Can DS1306EN+T&R be used as a direct replacement for DS1306EN/T&R in existing designs?

A: Yes. DS1306EN+T&R is electrically and mechanically equivalent to DS1306EN/T&R. All functional parameters, including SPI interface, memory configuration, voltage specifications, and package dimensions, are identical. No circuit modifications are required for substitution.

Q: What is the difference between the two part numbers?

A: The primary differences are product status (Active versus Obsolete), RoHS compliance (ROHS3 Compliant versus RoHS non-compliant), and packaging format (Cut Tape & Digi-Reel® versus standard tape and reel). Electrical and mechanical specifications are identical.

Q: Are there any compatibility concerns with the 20-TSSOP package?

A: No. Both parts use the identical 20-TSSOP (0.173", 4.40mm Width) package. PCB footprints, solder reflow profiles, and assembly processes are compatible without modification.

Q: Does the RoHS compliance difference affect functionality?

A: No. RoHS compliance is a regulatory and material composition specification. Functional performance, electrical characteristics, and operating parameters remain unchanged between RoHS non-compliant and ROHS3 compliant versions.

Q: Which part should be selected for new designs?

A: DS1306EN+T&R should be selected for new designs. It maintains active product status, provides ROHS3 compliance, and ensures long-term availability and supply chain continuity.

Q: Is the SPI interface protocol identical between both parts?

A: Yes. Both DS1306EN/T&R and DS1306EN+T&R implement the same SPI interface protocol. Firmware, software drivers, and communication routines are fully compatible without modification.