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Equivalent & Substitute Parts for RTC-8564JE:3
Part Overview
The RTC-8564JE:3 is a Real Time Clock (RTC) IC with Clock/Calendar functionality, featuring I2C 2-Wire Serial interface in a 20-LSSOJ surface mount package. This EPSON component provides timekeeping with alarm and Y2K capabilities across a 1.8V to 5.5V supply range, operating from -40°C to 85°C.
The RTC-8564JE:3 is classified as Obsolete. Equivalent and substitute parts are necessary to support ongoing production requirements, system redesigns, and long-term component availability. The substitute parts listed maintain functional compatibility while offering improved product status, compliance certifications, and availability.
Substiute Parts
Key Parameters
| Parameter | RTC-8564JE:3 |
|---|---|
| Manufacturer | EPSON |
| Category | Clock/Timing |
| Type | Clock/Calendar |
| Interface | I2C, 2-Wire Serial |
| Features | Alarm, Y2K |
| Time Format | HH:MM:SS |
| Date Format | YY-MM-DD-dd |
| Voltage - Supply | 1.8V ~ 5.5V |
| Current - Timekeeping (Max) | 0.7µA ~ 0.8µA @ 3V ~ 5V |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Surface Mount |
| Package / Case | 20-LSSOJ (0.213", 5.40mm Width) |
| Product Status | Obsolete |
| RoHS Status | RoHS non-compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts are grouped based on the following critical parameters that determine functional compatibility with the RTC-8564JE:3:
Primary Compatibility Criteria:
- Interface: I2C, 2-Wire Serial (mandatory match)
- Type: Clock/Calendar with timekeeping capability
- Time Format: HH:MM:SS support
- Date Format: YY-MM-DD-dd support
- Operating Temperature Range: -40°C to 85°C (minimum requirement)
- Voltage Supply Range: Overlap with 1.8V ~ 5.5V specification
Substitution Categories:
Direct Equivalent (Same Manufacturer): RTC-8564JE:B3:ROHS represents the active production variant of the RTC-8564JE series. Identical electrical specifications, package, and pinout. Upgraded to ROHS3 compliance and Active product status.
Functional Equivalents (Alternative Manufacturers): Parts from Renesas Electronics, Abracon LLC, Texas Instruments, and Analog Devices provide I2C Clock/Calendar functionality with compatible operating parameters. These parts differ in package form factor and specific feature sets but maintain core timekeeping and interface compatibility.
Parameter Comparison
| Parameter | RTC-8564JE:3 | RTC-8564JE:B3:ROHS | 1337DVGI | 1339-31DVGI8 | AB-RTCMC-32.768KHZ-B5ZE-S3-T | AB-RTCMC-32.768KHZ-IBO5-S3-T | BQ32002DR | DS1307+ | DS1338U-18+T&R | DS1338Z-3+ | DS3231M+ |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | EPSON | EPSON | Renesas | Renesas | Abracon | Abracon | Texas Instruments | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Type | Clock/Calendar | Clock/Calendar | Clock/Calendar | Clock/Calendar | Clock/Calendar | Clock/Calendar | Clock/Calendar | Clock/Calendar | Clock/Calendar | Clock/Calendar | Clock/Calendar |
| Interface | I2C, 2-Wire Serial | I2C, 2-Wire Serial | I2C, 2-Wire Serial | I2C, 2-Wire Serial | I2C, 2-Wire Serial | I2C, 2-Wire Serial | I2C, 2-Wire Serial | I2C, 2-Wire Serial | I2C, 2-Wire Serial | I2C, 2-Wire Serial | I2C, 2-Wire Serial |
| Time Format | HH:MM:SS | HH:MM:SS | HH:MM:SS (12/24 hr) | HH:MM:SS (12/24 hr) | HH:MM:SS (12/24 hr) | HH:MM:SS:hh (24 hr) | HH:MM:SS (24 hr) | HH:MM:SS (12/24 hr) | HH:MM:SS (12/24 hr) | HH:MM:SS (12/24 hr) | HH:MM:SS (12/24 hr) |
| Date Format | YY-MM-DD-dd | YY-MM-DD-dd | YY-MM-DD-dd | YY-MM-DD-dd | YY-MM-DD-dd | YY-MM-DD-dd | YY-MM-DD-dd | YY-MM-DD-dd | YY-MM-DD-dd | YY-MM-DD-dd | YY-MM-DD-dd |
| Voltage - Supply | 1.8V ~ 5.5V | 1.8V ~ 5.5V | 1.8V ~ 5.5V | 3.3V ~ 5.5V | 1.2V ~ 5.5V | 1.5V ~ 3.6V | 3V ~ 3.6V | 4.5V ~ 5.5V | 1.71V ~ 5.5V | 2.7V ~ 5.5V | 2.3V ~ 5.5V |
| Current - Timekeeping (Max) | 0.7µA ~ 0.8µA @ 3V ~ 5V | 0.7µA ~ 0.8µA @ 3V ~ 5V | 0.6µA @ 1.3V ~ 1.8V | 200µA @ 3.63V ~ 5.5V | 0.5µA @ 2V ~ 5V | 0.29µA ~ 0.33µA @ 1.8V ~ 3V | 65µA @ 3.3V | 200µA @ 5V | 100µA @ 1.89V | 200µA @ 3.3V | 130µA ~ 200µA @ 3.63V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | 0°C ~ 70°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Through Hole | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 20-LSSOJ (0.213", 5.40mm Width) | 20-LSSOJ (0.213", 5.40mm Width) | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | 10-SMD Module | Module | 8-SOIC (0.154", 3.90mm Width) | 8-DIP (0.300", 7.62mm) | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | 8-SOIC (0.154", 3.90mm Width) | 16-SOIC (0.295", 7.50mm Width) |
| Product Status | Obsolete | Active | Active | Active | Active | Not For New Designs | Active | Active | Active | Active | Active |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 3 (168 Hours) | 3 (168 Hours) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 3 (168 Hours) |
Engineering Selection Recommendations
Recommended Primary Substitute: RTC-8564JE:B3:ROHS
The RTC-8564JE:B3:ROHS is the direct equivalent replacement for the obsolete RTC-8564JE:3. It maintains identical electrical specifications, pinout, and package form factor while providing Active product status and ROHS3 compliance. This part requires no circuit redesign and offers the highest compatibility assurance. Inventory availability is significantly higher (11,962 units) compared to the original part (739 units).
Alternative Substitutes Based on Application Requirements:
For applications requiring package redesign or alternative form factors, the following parts are qualified substitutes based on matching I2C interface, Clock/Calendar functionality, and operating temperature range:
-
DS1338U-18+T&R (Analog Devices): Active status, ROHS3 compliant, 8-TSSOP package, extended voltage range (1.71V ~ 5.5V), suitable for low-power applications.
-
DS1338Z-3+ (Analog Devices): Active status, ROHS3 compliant, 8-SOIC package, voltage range 2.7V ~ 5.5V, established design history.
-
1337DVGI (Renesas): Active status, ROHS3 compliant, 8-TSSOP package, lowest timekeeping current (0.6µA @ 1.3V ~ 1.8V), optimized for ultra-low-power designs.
-
AB-RTCMC-32.768KHZ-B5ZE-S3-T (Abracon): Active status, ROHS3 compliant, 10-SMD Module package, extended voltage range (1.2V ~ 5.5V), integrated module design.
Parts Not Recommended for New Designs:
- AB-RTCMC-32.768KHZ-IBO5-S3-T: Marked "Not For New Designs" despite Active status.
- DS1307+: Operating temperature range limited to 0°C ~ 70°C (does not meet -40°C requirement); Through Hole mounting incompatible with surface mount assembly.
Frequently Asked Questions (FAQ)
Q: Can RTC-8564JE:B3:ROHS be used as a direct replacement for RTC-8564JE:3?
A: Yes. The RTC-8564JE:B3:ROHS is the direct equivalent with identical electrical specifications, pinout, and 20-LSSOJ package. No circuit modifications are required. The primary differences are Active product status and ROHS3 compliance.
Q: What are the key differences between the EPSON RTC-8564JE:B3:ROHS and the Analog Devices DS1338U-18+T&R?
A: Both parts provide I2C Clock/Calendar functionality with matching time and date formats. Primary differences include: package form factor (20-LSSOJ vs. 8-TSSOP), voltage supply range (1.8V ~ 5.5V vs. 1.71V ~ 5.5V), and timekeeping current specifications. The DS1338U-18+T&R requires PCB layout redesign due to different package dimensions.
Q: Which substitute part has the lowest power consumption during timekeeping?
A: The Renesas 1337DVGI offers the lowest timekeeping current at 0.6µA @ 1.3V ~ 1.8V. The Abracon AB-RTCMC-32.768KHZ-IBO5-S3-T provides 0.29µA ~ 0.33µA @ 1.8V ~ 3V but is marked "Not For New Designs."
Q: Are all substitute parts RoHS compliant?
A: All substitute parts listed are ROHS3 compliant. The original RTC-8564JE:3 is RoHS non-compliant. The RTC-8564JE:B3:ROHS upgrade addresses this compliance requirement.
Q: What is the impact of package differences on circuit redesign?
A: The RTC-8564JE:3 and RTC-8564JE:B3:ROHS use identical 20-LSSOJ packages, requiring no redesign. Alternative packages (8-TSSOP, 8-SOIC, Module) require PCB layout modifications, schematic updates, and potential firmware adjustments for different pin assignments. Verify pinout compatibility before substitution.
Q: Can DS1307+ be used as a substitute?
A: DS1307+ is not recommended. Its operating temperature range (0°C ~ 70°C) does not meet the -40°C ~ 85°C requirement of the RTC-8564JE:3. Additionally, it uses Through Hole mounting, incompatible with surface mount assembly processes.
Q: What is the moisture sensitivity impact of substitute parts?
A: The RTC-8564JE:3 and most substitutes have MSL 1 (Unlimited). The Renesas 1337DVGI, 1339-31DVGI8, and Analog Devices DS3231M+ have MSL 3 (168 Hours), requiring controlled storage and handling procedures during manufacturing.
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