Equivalent & Substitute Parts for 1337DVGI8

Part Overview

The 1337DVGI8 is a Real Time Clock (RTC) IC with Clock/Calendar functionality manufactured by Renesas Electronics Corporation. This surface mount device operates via I2C 2-Wire Serial interface and is housed in an 8-TSSOP/8-MSOP package. The part is Active status and ROHS3 compliant, featuring alarm capability, leap year support, and square wave output. Finding equivalent and substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and accommodate varying packaging or performance requirements across different application scenarios.

Key Parameters

Parameter	Value
Manufacturer Part Number	1337DVGI8
Manufacturer	Renesas Electronics Corporation
Category	Clock/Timing
Type	Clock/Calendar
Interface	I2C, 2-Wire Serial
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Voltage - Supply	1.8V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Features	Alarm, Leap Year, Square Wave Output
Time Format	HH:MM:SS (12/24 hr)
Date Format	YY-MM-DD-dd
Current - Timekeeping (Max)	0.6µA @ 1.3V ~ 1.8V
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility for the 1337DVGI8 is determined by 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)
Voltage - Supply: 1.8V ~ 5.5V (mandatory match or superset)
Features: Alarm, Leap Year, Square Wave Output (all three required)

Secondary Compatibility Criteria:

Package / Case: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) (preferred match)
Mounting Type: Surface Mount (preferred match)
RoHS Status: ROHS3 Compliant (preferred match)

Substitute parts are grouped into two categories:

Category A - Direct Functional Equivalents (Same Package, Same Voltage Range):

ISL12057IUZ (Tube packaging)
ISL12057IUZ-T (Tape & Reel packaging)
DS1337U+ (Tube packaging)
DS1337U+T&R (Cut Tape & Digi-Reel packaging)
DS1338U-18+ (Tube packaging)

Category B - Functional Equivalents with Package or Voltage Variations:

AB-RTCMC-32.768KHZ-EOZ9-S3-DBT (10-SMD Module package, extended voltage range 1.4V ~ 5.5V)
AB1805-T3 (16-VFQFN package, reduced voltage range 1.7V ~ 3.6V)
DS1307N+ (8-DIP through-hole package, higher voltage requirement 4.5V ~ 5.5V)
DS1337+ (8-DIP through-hole package, same voltage range)
DS3231SN#T&R (16-SOIC package, higher voltage requirement 2.3V ~ 5.5V)

Parameter Comparison

Part Number	Manufacturer	Interface	Package / Case	Voltage - Supply	Operating Temp	Features	Time Format	Date Format	Current - Timekeeping (Max)	Mounting Type	RoHS Status
1337DVGI8	Renesas	I2C, 2-Wire Serial	8-TSSOP, 8-MSOP	1.8V ~ 5.5V	-40°C ~ 85°C	Alarm, Leap Year, Square Wave Output	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	0.6µA @ 1.3V ~ 1.8V	Surface Mount	ROHS3 Compliant
ISL12057IUZ	Renesas	I2C, 2-Wire Serial	8-TSSOP, 8-MSOP	1.8V ~ 3.6V	-40°C ~ 85°C	Alarm, Leap Year	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	0.65µA @ 1.8V	Surface Mount	ROHS3 Compliant
ISL12057IUZ-T	Renesas	I2C, 2-Wire Serial	8-TSSOP, 8-MSOP	1.8V ~ 3.6V	-40°C ~ 85°C	Alarm, Leap Year	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	0.65µA @ 1.8V	Surface Mount	ROHS3 Compliant
DS1337U+	Analog Devices Inc./Maxim Integrated	I2C, 2-Wire Serial	8-TSSOP, 8-MSOP	1.8V ~ 5.5V	-40°C ~ 85°C	Alarm, Leap Year, Square Wave Output	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	0.6µA @ 1.3V ~ 1.8V	Surface Mount	ROHS3 Compliant
DS1337U+T&R	Analog Devices Inc./Maxim Integrated	I2C, 2-Wire Serial	8-TSSOP, 8-MSOP	1.8V ~ 5.5V	-40°C ~ 85°C	Alarm, Leap Year, Square Wave Output	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	0.6µA @ 1.3V ~ 1.8V	Surface Mount	ROHS3 Compliant
DS1338U-18+	Analog Devices Inc./Maxim Integrated	I2C, 2-Wire Serial	8-TSSOP, 8-MSOP	1.71V ~ 5.5V	-40°C ~ 85°C	Leap Year, NVSRAM, Square Wave Output	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	100µA @ 1.89V	Surface Mount	ROHS3 Compliant
AB-RTCMC-32.768KHZ-EOZ9-S3-DBT	Abracon LLC	I2C, 2-Wire Serial	10-SMD Module	1.4V ~ 5.5V	-40°C ~ 85°C	Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, TCXO/Crystal, Trickle-Charger	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	1.5µA ~ 2.2µA @ 1.4V ~ 5V	Surface Mount	ROHS3 Compliant
AB1805-T3	Abracon LLC	I2C, 2-Wire Serial	16-VFQFN Exposed Pad	1.7V ~ 3.6V	-40°C ~ 85°C	Alarm, Leap Year, SRAM, Trickle-Charger, Watchdog Timer	HH:MM:SS:hh	YY-MM-DD-dd	0.17µA ~ 0.22µA @ 1.8V ~ 3V	Surface Mount	ROHS3 Compliant
DS1307N+	Analog Devices Inc./Maxim Integrated	I2C, 2-Wire Serial	8-DIP (0.300", 7.62mm)	4.5V ~ 5.5V	-40°C ~ 85°C	Leap Year, NVSRAM, Square Wave Output	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	200µA @ 5V	Through Hole	ROHS3 Compliant
DS1337+	Analog Devices Inc./Maxim Integrated	I2C, 2-Wire Serial	8-DIP (0.300", 7.62mm)	1.8V ~ 5.5V	-40°C ~ 85°C	Alarm, Leap Year, Square Wave Output	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	0.6µA @ 1.3V ~ 1.8V	Through Hole	ROHS3 Compliant
DS3231SN#T&R	Analog Devices Inc./Maxim Integrated	I2C, 2-Wire Serial	16-SOIC (0.295", 7.50mm Width)	2.3V ~ 5.5V	-40°C ~ 85°C	Alarm, Leap Year, Square Wave Output, TCXO/Crystal	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	110µA ~ 170µA @ 3.63V ~ 5.5V	Surface Mount	ROHS3 Compliant

Engineering Selection Recommendations

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

DS1337U+ and DS1337U+T&R are the closest functional equivalents to the 1337DVGI8. Both parts share identical electrical specifications, feature set (Alarm, Leap Year, Square Wave Output), voltage supply range (1.8V ~ 5.5V), operating temperature (-40°C ~ 85°C), and package type (8-TSSOP/8-MSOP). The only difference is packaging format: DS1337U+ is supplied in Tube, while DS1337U+T&R is supplied in Cut Tape & Digi-Reel. Both are Active status and ROHS3 compliant with unlimited MSL rating.

Same-Package Substitutes with Voltage Limitations:

ISL12057IUZ and ISL12057IUZ-T maintain the same 8-TSSOP/8-MSOP package and surface mount configuration. However, the voltage supply range is reduced to 1.8V ~ 3.6V, which excludes applications requiring the full 5.5V upper limit. These parts are suitable only for low-voltage designs. Both are Active status and ROHS3 compliant with superior MSL rating (1 - Unlimited).

Same-Package Substitute with Feature Limitation:

DS1338U-18+ uses the same 8-TSSOP/8-MSOP package but lacks the Square Wave Output feature present in the 1337DVGI8. This part includes NVSRAM and operates at 1.71V ~ 5.5V. Current consumption during timekeeping is significantly higher (100µA @ 1.89V versus 0.6µA @ 1.3V ~ 1.8V). This substitute is suitable only for applications that do not require square wave output functionality.

Alternative Package Substitutes:

DS1337+ provides identical electrical and feature specifications in an 8-DIP through-hole package, suitable for breadboard prototyping or legacy PCB designs. DS3231SN#T&R offers enhanced functionality with integrated TCXO/Crystal in a 16-SOIC package but requires minimum 2.3V supply voltage and exhibits higher timekeeping current consumption (110µA ~ 170µA).

Module-Based Substitute:

AB-RTCMC-32.768KHZ-EOZ9-S3-DBT is a complete 10-SMD module with integrated crystal, EEPROM, SRAM, and trickle-charger. It operates across 1.4V ~ 5.5V and includes additional features beyond the base 1337DVGI8 specification. This substitute is appropriate for applications requiring integrated crystal and backup power management.

Lower-Power Substitute:

AB1805-T3 achieves significantly lower timekeeping current (0.17µA ~ 0.22µA @ 1.8V ~ 3V) but operates only at 1.7V ~ 3.6V and uses a different 16-VFQFN package. This part is suitable for ultra-low-power battery-backed applications with compatible voltage requirements.

All substitute parts listed are Active status and ROHS3 compliant, meeting regulatory requirements equivalent to the 1337DVGI8.

Frequently Asked Questions (FAQ)

Q: Can I use ISL12057IUZ as a direct replacement for 1337DVGI8?

A: ISL12057IUZ is electrically compatible in the same 8-TSSOP/8-MSOP package and shares I2C interface, time/date formats, and operating temperature range. However, the voltage supply range is limited to 1.8V ~ 3.6V, excluding the 3.6V to 5.5V operating window of the 1337DVGI8. Additionally, ISL12057IUZ lacks the Square Wave Output feature. Use this part only if your application operates exclusively within the 1.8V ~ 3.6V range and does not require square wave output.

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

A: Both parts are electrically and functionally identical. The difference is packaging format only. 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 and inventory management preferences.

Q: Why does DS1338U-18+ show higher timekeeping current than 1337DVGI8?

A: DS1338U-18+ is specified at 100µA @ 1.89V, compared to 1337DVGI8 at 0.6µA @ 1.3V ~ 1.8V. This represents a different measurement condition and device architecture. DS1338U-18+ includes integrated NVSRAM, which contributes to higher current consumption. This part is not suitable for ultra-low-power battery-backed applications.

Q: Can I use DS1307N+ or DS1337+ as substitutes?

A: Both parts provide the required I2C interface, time/date formats, and operating temperature range. However, they use 8-DIP through-hole packages instead of surface mount. DS1307N+ requires 4.5V ~ 5.5V supply voltage, limiting its use to 5V systems only. DS1337+ maintains the full 1.8V ~ 5.5V voltage range. These parts are suitable only for through-hole PCB designs or prototyping applications.

Q: What are the advantages of AB-RTCMC-32.768KHZ-EOZ9-S3-DBT?

A: This module-based substitute includes integrated 32.768 kHz crystal, EEPROM, SRAM, and trickle-charger functionality. It operates across an extended voltage range (1.4V ~ 5.5V) and eliminates the need for external crystal components. The 10-SMD module package is larger than the 8-TSSOP package of the 1337DVGI8. Use this part when integrated crystal and backup power management are required.

Q: Is AB1805-T3 suitable for my application?

A: AB1805-T3 achieves exceptional low-power performance (0.17µA ~ 0.22µA timekeeping current) but operates only at 1.7V ~ 3.6V and uses a 16-VFQFN package. This part is suitable exclusively for ultra-low-power battery-backed applications with compatible voltage requirements. It is not a general-purpose substitute for the 1337DVGI8.

Q: Do all substitute parts have the same RoHS compliance status?

A: Yes. All substitute parts listed are ROHS3 compliant, matching the compliance status of the 1337DVGI8. All parts are also Active status products with current manufacturing support.

Q: What is the MSL (Moisture Sensitivity Level) difference between 1337DVGI8 and substitute parts?

A: The 1337DVGI8 has MSL 3 (168 Hours), requiring controlled storage conditions. Most substitute parts (ISL12057IUZ, ISL12057IUZ-T, DS1337U+, DS1337U+T&R, DS1338U-18+, AB-RTCMC-32.768KHZ-EOZ9-S3-DBT, AB1805-T3, DS1307N+, DS1337+, DS3231SN#T&R) have MSL 1 (Unlimited), offering superior moisture tolerance and simplified storage requirements.

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