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R2223L-E2 Equivalent & Substitute Parts
Part Overview
The R2223L-E2 is a Real Time Clock (RTC) IC manufactured by Nisshinbo Micro Devices Inc., designed for clock/calendar applications requiring I2C 2-Wire Serial communication. This device operates across a wide supply voltage range of 1.5V to 5.5V and features alarm functionality, leap year support, and integrated RAM. The part is housed in a 12-XFQFN Exposed Pad surface mount package and maintains ROHS3 compliance with unlimited moisture sensitivity rating.
The R2223L-E2 is currently in active product status with 998 units in stock. Equivalent and substitute parts are identified based on matching functional requirements, electrical parameters, and interface specifications to support design flexibility, supply chain alternatives, and application-specific packaging requirements.
Substiute Parts
Key Parameters
| Parameter | R2223L-E2 Specification |
|---|---|
| Manufacturer | Nisshinbo Micro Devices Inc. |
| Category | Clock/Timing |
| Type | Clock/Calendar |
| Interface | I2C, 2-Wire Serial |
| Package / Case | 12-XFQFN Exposed Pad |
| Voltage - Supply | 1.5V ~ 5.5V |
| Current - Timekeeping (Max) | 0.9µA @ 3V |
| Operating Temperature | -40°C ~ 85°C |
| Time Format | HH:MM:SS (12/24 hr) |
| Date Format | YY-MM-DD-dd |
| Features | Alarm, Leap Year, RAM |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Product Status | Active |
Substitute Part Grouping Explanation
Substitute parts for the R2223L-E2 are qualified based on the following critical parameters:
Interface Compatibility: All substitute parts maintain I2C 2-Wire Serial communication protocol, ensuring direct software compatibility without firmware modification.
Functional Features: Substitute parts include alarm functionality and leap year support, matching the core timekeeping capabilities of the R2223L-E2.
Time and Date Format: All substitutes support HH:MM:SS (12/24 hour) time format and YY-MM-DD-dd date format, maintaining data structure compatibility.
Operating Temperature Range: All substitute parts operate across the -40°C to 85°C temperature range, supporting identical environmental specifications.
Supply Voltage Overlap: Substitute parts operate within voltage ranges that overlap with or encompass the R2223L-E2 specification of 1.5V to 5.5V, ensuring power supply compatibility.
RoHS3 Compliance: All substitute parts maintain ROHS3 compliance status, meeting regulatory requirements.
Mounting Type: All substitutes are surface mount devices, supporting identical PCB assembly processes.
Substitutes are grouped by package type to facilitate selection based on specific layout and thermal management requirements. Package variations include 20-SOIC, 8-SOIC, 8-LCC, 8-TSSOP, 8-MSOP, 8-VDFN, and 8-WFDFN configurations.
Parameter Comparison
| Parameter | R2223L-E2 | DS3232SN#T&R | ISL12058IBZ | ISL1218IUZ | M41T62LC6F | M41T82RM6F | MCP7940N-I/ST | MCP7940NT-E/SN | MCP7940NT-I/MNY | PCF85063AT/AY | PCF8523TK/1,118 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Nisshinbo Micro Devices Inc. | Analog Devices Inc./Maxim Integrated | Renesas Electronics Corporation | Renesas Electronics Corporation | STMicroelectronics | STMicroelectronics | Microchip Technology | Microchip Technology | Microchip Technology | NXP Semiconductors | NXP USA Inc. |
| 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 | I2C, 2-Wire Serial |
| Voltage - Supply | 1.5V ~ 5.5V | 2.3V ~ 5.5V | 1.8V ~ 3.6V | 2.7V ~ 5.5V | 1.3V ~ 4.4V | 2.7V ~ 5.5V | 1.8V ~ 5.5V | 1.8V ~ 5.5V | 1.8V ~ 5.5V | 0.9V ~ 5.5V, 1.8V ~ 5.5V | 1.6V ~ 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 | -40°C ~ 125°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C |
| Time Format | HH:MM:SS (12/24 hr) | 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:hh (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) | 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 |
| Features | Alarm, Leap Year, RAM | Alarm, Leap Year, Square Wave Output, SRAM, TCXO/Crystal | Alarm, Leap Year | Alarm, Leap Year, SRAM | Alarm, Leap Year, Square Wave Output, Watchdog Timer | Alarm, Leap Year, SRAM, Watchdog Timer | Alarm, Leap Year, Square Wave Output, SRAM | Alarm, Leap Year, Square Wave Output, SRAM | Alarm, Leap Year, Square Wave Output, SRAM | Alarm, Leap Year, Square Wave Output | Alarm, Leap Year, Watchdog Timer |
| Package / Case | 12-XFQFN Exposed Pad | 20-SOIC (0.295", 7.50mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | 8-LCC | 8-SOIC (0.154", 3.90mm Width) | 8-TSSOP (0.173", 4.40mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-WFDFN Exposed Pad | 8-SOIC (0.154", 3.90mm Width) | 8-VDFN Exposed Pad |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Product Status | Active | Active | Active | Obsolete | Active | Active | Active | Active | Active | Active | Active |
Engineering Selection Recommendations
Primary Substitutes (Active Status, Full Compatibility)
MCP7940NT-E/SN and MCP7940NT-I/MNY are recommended as primary substitutes. Both parts maintain active product status, ROHS3 compliance, and AEC-Q100 automotive qualification. These Microchip Technology devices provide 64B memory, alarm functionality, leap year support, and square wave output. The MCP7940NT-E/SN operates to 125°C, extending the upper temperature limit beyond the R2223L-E2. Both parts support 1.8V to 5.5V supply voltage with 1.2µA timekeeping current at 3.3V.
Secondary Substitutes (Active Status, Package-Specific Selection)
PCF85063AT/AY and PCF8523TK/1,118 from NXP Semiconductors offer ultra-low power operation. The PCF85063AT/AY achieves 0.6µA timekeeping current at 3.3V and supports supply voltage from 0.9V to 5.5V. The PCF8523TK/1,118 provides 0.5µA timekeeping current at 2V to 5V operation with integrated watchdog timer functionality. Both maintain active status and ROHS3 compliance.
Alternative Substitutes (Active Status, Extended Features)
DS3232SN#T&R from Analog Devices Inc./Maxim Integrated provides 236B SRAM, TCXO/Crystal support, and square wave output. This 20-SOIC package device operates across -40°C to 85°C with 120µA to 160µA timekeeping current at 3.3V to 5.5V. M41T62LC6F from STMicroelectronics offers watchdog timer functionality in an 8-LCC package with 0.7µA to 0.95µA timekeeping current across 1.3V to 4.4V supply range.
Obsolete Status Consideration
ISL1218IUZ is marked as obsolete product status. While functionally compatible with alarm, leap year, and SRAM features, this Renesas device should not be selected for new designs requiring long-term supply assurance.
Compliance and Certification
All recommended substitutes maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). MCP7940 series devices carry AEC-Q100 automotive qualification, supporting applications requiring automotive-grade reliability.
Frequently Asked Questions (FAQ)
Q: Can MCP7940NT-E/SN directly replace R2223L-E2 in existing designs?
A: MCP7940NT-E/SN maintains I2C 2-Wire Serial interface, identical time/date format (HH:MM:SS 12/24 hr, YY-MM-DD-dd), and overlapping supply voltage range (1.8V to 5.5V encompasses the R2223L-E2 range above 1.8V). However, package differs: MCP7940NT-E/SN uses 8-SOIC versus R2223L-E2's 12-XFQFN. PCB layout modification is required. Software compatibility is maintained at the I2C protocol level.
Q: What is the primary difference between MCP7940NT-E/SN and MCP7940NT-I/MNY?
A: Both parts share identical electrical specifications, features, and automotive qualification. The primary difference is package type: MCP7940NT-E/SN uses 8-SOIC (0.154", 3.90mm Width), while MCP7940NT-I/MNY uses 8-WFDFN Exposed Pad. Selection depends on PCB layout requirements and thermal management strategy. MCP7940NT-I/MNY's exposed pad provides enhanced thermal dissipation.
Q: Which substitute offers the lowest power consumption?
A: PCF8523TK/1,118 provides the lowest timekeeping current at 0.5µA across 2V to 5V operation. PCF85063AT/AY achieves 0.6µA at 3.3V. Both significantly outperform the R2223L-E2's 0.9µA at 3V specification. Selection between these two depends on package requirements: PCF8523TK/1,118 uses 8-VDFN Exposed Pad, while PCF85063AT/AY uses 8-SOIC.
Q: Are all substitutes suitable for automotive applications?
A: MCP7940 series devices (MCP7940N-I/ST, MCP7940NT-E/SN, MCP7940NT-I/MNY) carry AEC-Q100 automotive qualification. Other substitutes do not list automotive qualification in provided specifications. For automotive applications, MCP7940 series is the qualified selection.
Q: What supply voltage range is common across all substitutes?
A: The overlapping supply voltage range across all substitutes is 1.8V to 5.5V. The R2223L-E2 extends lower to 1.5V, which is not supported by most substitutes. Applications requiring operation below 1.8V must retain the R2223L-E2 or select PCF85063AT/AY (0.9V minimum) or PCF8523TK/1,118 (1.6V minimum).
Q: Can I use DS3232SN#T&R as a direct replacement?
A: DS3232SN#T&R maintains I2C interface and identical time/date format. However, it uses 20-SOIC package versus R2223L-E2's 12-XFQFN, requiring significant PCB redesign. Additionally, DS3232SN#T&R draws 120µA to 160µA timekeeping current, substantially higher than R2223L-E2's 0.9µA, affecting battery-backed operation. Selection should be based on specific application requirements for SRAM capacity (236B) and TCXO support.
Q: Which substitute provides the best thermal performance?
A: MCP7940NT-I/MNY and PCF8523TK/1,118 feature exposed pad packages (8-WFDFN and 8-VDFN respectively), providing direct thermal coupling to PCB ground plane. These packages offer superior thermal dissipation compared to standard SOIC or LCC packages without exposed pads.
Q: Is the ISL1218IUZ suitable for new product development?
A: ISL1218IUZ is marked as obsolete product status. While functionally compatible, obsolete status indicates discontinued manufacturing and limited future availability. New designs should select from active status alternatives: MCP7940 series, PCF85063AT/AY, PCF8523TK/1,118, or M41T62LC6F.
Q: What are the memory differences between substitutes?
A: R2223L-E2 includes RAM but memory size is not specified. DS3232SN#T&R provides 236B SRAM. MCP7940 series devices provide 64B SRAM. ISL1218IUZ provides 8B SRAM. M41T82RM6F provides 7B SRAM. PCF85063AT/AY and PCF8523TK/1,118 memory size is not specified. Application-specific memory requirements determine selection.
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