Equivalent & Substitute Parts for 1337DVGI

Part Overview

The 1337DVGI is a Real Time Clock (RTC) IC Clock/Calendar with I2C, 2-Wire Serial interface manufactured by Renesas Electronics Corporation. This device operates across a wide supply voltage range of 1.8V to 5.5V and features alarm functionality, leap year support, and square wave output capabilities. The part is currently in active product status with 657 units in stock.

Finding equivalent and substitute parts for the 1337DVGI is necessary to address supply chain flexibility, packaging preferences, inventory availability, and design optimization across different application requirements while maintaining functional compatibility.

Key Parameters

Parameter	1337DVGI Specification
Manufacturer	Renesas Electronics Corporation
Category	Clock/Timing
Type	Clock/Calendar
Interface	I2C, 2-Wire Serial
Voltage - Supply	1.8V ~ 5.5V
Current - Timekeeping (Max)	0.6µA @ 1.3V ~ 1.8V
Operating Temperature	-40°C ~ 85°C
Time Format	HH:MM:SS (12/24 hr)
Date Format	YY-MM-DD-dd
Features	Alarm, Leap Year, Square Wave Output
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution logic for the 1337DVGI is based on the following critical parameters:

Primary Compatibility Criteria:

Interface: I2C, 2-Wire Serial (mandatory match)
Time Format: HH:MM:SS (12/24 hr) (mandatory match)
Date Format: YY-MM-DD-dd (mandatory match)
Operating Temperature: -40°C ~ 85°C (mandatory match)
Mounting Type: Surface Mount (mandatory match)
RoHS Status: ROHS3 Compliant (mandatory match)

Secondary Compatibility Criteria:

Voltage - Supply range must encompass or be compatible with 1.8V ~ 5.5V
Features must include Alarm and Leap Year as minimum requirements
Package / Case must be 8-TSSOP, 8-MSOP or equivalent 8-pin surface mount packages
Current - Timekeeping specifications should be comparable for low-power applications

Substitute parts are grouped into two categories:

Category A - Direct Functional Equivalents (Renesas ISL12057 Series): Parts ISL12057IUZ and ISL12057IUZ-T maintain identical time/date formats, I2C interface, and operating temperature range. These parts operate at 1.8V ~ 3.6V, which is a subset of the 1337DVGI range. Both are ROHS3 compliant and feature alarm and leap year support.

Category B - Cross-Manufacturer Equivalents (Analog Devices/Maxim DS1337 Series): Parts DS1337U+ and DS1337U+T&R are direct functional matches with identical voltage range (1.8V ~ 5.5V), current specifications, and feature set including square wave output. These parts maintain the same 8-pin package footprint and operating temperature range.

Category C - Extended Feature Alternatives: Parts DS1307Z+, DS1338C-33#T&R, DS1338U-3+, and DS1339BU+ provide RTC functionality with variations in package size, memory configuration, and voltage ranges. These parts maintain core I2C interface and time/date format compatibility but may require design verification for specific voltage or package requirements.

Category D - Module-Based Solutions (Abracon LLC): Parts AB-RTCMC-32.768KHZ-EOZ9-S3-DBT and AB-RTCMC-32.768KHZ-IBO5-S3-T are integrated RTC modules with additional features such as EEPROM, SRAM, and trickle-charger functionality. These parts operate in different voltage ranges and are suitable for applications requiring integrated crystal and memory solutions.

Parameter Comparison

Part Number	Manufacturer	Interface	Voltage - Supply	Current - Timekeeping (Max)	Operating Temperature	Time Format	Date Format	Features	Package / Case	RoHS Status	Product Status
1337DVGI	Renesas Electronics	I2C, 2-Wire Serial	1.8V ~ 5.5V	0.6µA @ 1.3V ~ 1.8V	-40°C ~ 85°C	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Alarm, Leap Year, Square Wave Output	8-TSSOP, 8-MSOP	ROHS3 Compliant	Active
ISL12057IUZ	Renesas Electronics	I2C, 2-Wire Serial	1.8V ~ 3.6V	0.65µA @ 1.8V	-40°C ~ 85°C	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Alarm, Leap Year	8-TSSOP, 8-MSOP	ROHS3 Compliant	Active
ISL12057IUZ-T	Renesas Electronics	I2C, 2-Wire Serial	1.8V ~ 3.6V	0.65µA @ 1.8V	-40°C ~ 85°C	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Alarm, Leap Year	8-TSSOP, 8-MSOP	ROHS3 Compliant	Active
DS1337U+	Analog Devices Inc./Maxim Integrated	I2C, 2-Wire Serial	1.8V ~ 5.5V	0.6µA @ 1.3V ~ 1.8V	-40°C ~ 85°C	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Alarm, Leap Year, Square Wave Output	8-TSSOP, 8-MSOP	ROHS3 Compliant	Active
DS1337U+T&R	Analog Devices Inc./Maxim Integrated	I2C, 2-Wire Serial	1.8V ~ 5.5V	0.6µA @ 1.3V ~ 1.8V	-40°C ~ 85°C	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Alarm, Leap Year, Square Wave Output	8-TSSOP, 8-MSOP	ROHS3 Compliant	Active
AB-RTCMC-32.768KHZ-EOZ9-S3-DBT	Abracon LLC	I2C, 2-Wire Serial	1.4V ~ 5.5V	1.5µA ~ 2.2µA @ 1.4V ~ 5V	-40°C ~ 85°C	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, TCXO/Crystal, Trickle-Charger	10-SMD Module	ROHS3 Compliant	Active
AB-RTCMC-32.768KHZ-IBO5-S3-T	Abracon LLC	I2C, 2-Wire Serial	1.5V ~ 3.6V	0.29µA ~ 0.33µA @ 1.8V ~ 3V	-40°C ~ 85°C	HH:MM:SS:hh (24 hr)	YY-MM-DD-dd	Alarm, Square Wave Output, SRAM, Trickle Charge, Watchdog Timer	Module	ROHS3 Compliant	Not For New Designs
DS1307Z+	Analog Devices Inc./Maxim Integrated	I2C, 2-Wire Serial	4.5V ~ 5.5V	200µA @ 5V	0°C ~ 70°C	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Leap Year, NVSRAM, Square Wave Output	8-SOIC	ROHS3 Compliant	Active
DS1338C-33#T&R	Analog Devices Inc./Maxim Integrated	I2C, 2-Wire Serial	3V ~ 5.5V	125µA ~ 200µA @ 3.63V ~ 5.5V	-40°C ~ 85°C	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Leap Year, NVSRAM, Square Wave Output	16-SOIC	ROHS3 Compliant	Active
DS1338U-3+	Analog Devices Inc./Maxim Integrated	I2C, 2-Wire Serial	2.7V ~ 5.5V	200µA @ 3.3V	-40°C ~ 85°C	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Leap Year, NVSRAM, Square Wave Output	8-TSSOP, 8-MSOP	ROHS3 Compliant	Active
DS1339BU+	Analog Devices Inc./Maxim Integrated	I2C, 2-Wire Serial	1.71V ~ 5.5V	200µA @ 1.71V ~ 5.5V	-40°C ~ 85°C	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Alarm, Leap Year, Square Wave Output, Trickle-Charger	8-TSSOP, 8-MSOP	ROHS3 Compliant	Active

Engineering Selection Recommendations

Direct Pin-Compatible Substitutes (Recommended for Drop-In Replacement):

DS1337U+ and DS1337U+T&R are the primary recommended substitutes for the 1337DVGI. Both parts maintain identical electrical specifications including voltage range (1.8V ~ 5.5V), timekeeping current (0.6µA @ 1.3V ~ 1.8V), and feature set (Alarm, Leap Year, Square Wave Output). Both are ROHS3 compliant and active products. The only difference is packaging format: DS1337U+ is supplied in Tube, while DS1337U+T&R is supplied in Cut Tape & Digi-Reel format. These parts are functionally equivalent and require no design modifications.

Voltage-Constrained Alternatives (For Low-Voltage Applications):

ISL12057IUZ and ISL12057IUZ-T are suitable substitutes when the application operates exclusively within the 1.8V ~ 3.6V range. These Renesas parts maintain identical time/date formats, I2C interface, and operating temperature specifications. The timekeeping current is marginally higher at 0.65µA compared to 0.6µA. Both are ROHS3 compliant and active products. ISL12057IUZ is supplied in Tube, while ISL12057IUZ-T is supplied in Tape & Reel format.

Extended Feature Solutions (For Integrated Crystal and Memory Requirements):

AB-RTCMC-32.768KHZ-EOZ9-S3-DBT is a module-based solution that integrates the RTC IC with crystal oscillator, EEPROM, SRAM, and trickle-charger functionality. This part operates across 1.4V ~ 5.5V and is suitable for applications requiring integrated timekeeping solutions. The module format (10-SMD) differs from the discrete IC package, requiring PCB layout modifications. This part is ROHS3 compliant and active.

Not Recommended for New Designs:

AB-RTCMC-32.768KHZ-IBO5-S3-T carries a "Not For New Designs" product status and should not be selected for new applications despite its lower timekeeping current specification.

Limited Compatibility Alternatives:

DS1307Z+ operates only within 4.5V ~ 5.5V and 0°C ~ 70°C temperature range, making it unsuitable for applications requiring the full -40°C ~ 85°C operating range or lower voltage operation of the 1337DVGI.

DS1338C-33#T&R uses a 16-SOIC package instead of the 8-pin package, requiring significant PCB redesign and is not recommended as a direct substitute.

DS1338U-3+ and DS1339BU+ have higher timekeeping current specifications (200µA @ 3.3V and 200µA @ 1.71V ~ 5.5V respectively) compared to the 1337DVGI, making them unsuitable for ultra-low-power applications.

Frequently Asked Questions (FAQ)

Q: Can I use ISL12057IUZ as a direct replacement for 1337DVGI in a 5V application?

A: No. The ISL12057IUZ operates only within 1.8V ~ 3.6V, which does not encompass the 5V supply voltage of the 1337DVGI. If your application requires 5V operation, use DS1337U+ or DS1337U+T&R instead.

Q: What is the difference between DS1337U+ and DS1337U+T&R?

A: Both parts are electrically identical with the same specifications, voltage range, and feature set. The difference is packaging format: DS1337U+ is supplied in Tube packaging, while DS1337U+T&R is supplied in Cut Tape & Digi-Reel format. Select based on your assembly process requirements.

Q: Are the Abracon module solutions pin-compatible with the 1337DVGI?

A: No. The Abracon modules (AB-RTCMC series) use module packaging formats (10-SMD Module or generic Module) rather than discrete 8-pin IC packages. These solutions require PCB redesign and are suitable only for applications where integrated crystal and memory functionality provide design advantages.

Q: Can I use DS1307Z+ as a substitute?

A: DS1307Z+ is not recommended as a substitute. It operates only within 4.5V ~ 5.5V and 0°C ~ 70°C, which does not meet the full operating temperature range (-40°C ~ 85°C) of the 1337DVGI. Additionally, its timekeeping current is significantly higher at 200µA @ 5V.

Q: What are the key parameters I must verify when selecting a substitute?

A: Verify the following parameters match or are compatible with your application requirements: (1) I2C, 2-Wire Serial interface, (2) Supply voltage range encompasses your operating voltage, (3) Operating temperature range includes -40°C ~ 85°C, (4) Time format HH:MM:SS (12/24 hr) and Date format YY-MM-DD-dd, (5) Package / Case is 8-pin surface mount (8-TSSOP or 8-MSOP), (6) ROHS3 compliance status, and (7) Product status is Active.

Q: Why does the 1337DVGI have a "Square Wave Output" feature while ISL12057 does not list this feature?

A: The ISL12057 series does not explicitly list square wave output in the provided specifications. If square wave output is a critical requirement for your application, select DS1337U+ or DS1337U+T&R, which explicitly include this feature.

Q: What is the timekeeping current difference between 1337DVGI and its substitutes?

A: The 1337DVGI specifies 0.6µA @ 1.3V ~ 1.8V. ISL12057 series specifies 0.65µA @ 1.8V (marginally higher). DS1337U+ matches at 0.6µA @ 1.3V ~ 1.8V. AB-RTCMC-32.768KHZ-IBO5-S3-T specifies 0.29µA ~ 0.33µA @ 1.8V ~ 3V (significantly lower). For ultra-low-power applications, verify timekeeping current specifications against your power budget.

Q: Can I mix packaging formats (Tube vs. Tape & Reel) in my design?

A: Yes. Tube and Tape & Reel packaging formats contain electrically identical parts. The packaging format affects only the supply method and assembly process. Select based on your manufacturing and inventory management requirements.

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