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RX-8803LC:UC3 PURE SN Equivalent & Substitute Parts
Part Overview
The RX-8803LC:UC3 PURE SN is a Real Time Clock (RTC) IC with Clock/Calendar functionality manufactured by EPSON. This device operates via I2C interface and supports a supply voltage range of 1.6V to 5.5V, making it suitable for low-power applications. The part is currently in Active product status with 753 units in stock. Equivalent and substitute parts are identified based on matching functional categories, interface protocols, operating temperature ranges, and package compatibility to ensure seamless integration into existing designs.
Substiute Parts
Key Parameters
| Parameter | RX-8803LC:UC3 PURE SN |
|---|---|
| Manufacturer | EPSON |
| Category | Clock/Timing |
| Type | Clock/Calendar |
| Interface | I2C |
| Package / Case | 12-TFSOJ (0.094", 2.40mm Width) |
| Voltage - Supply | 1.6V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C |
| Time Format | HH:MM:SS |
| Date Format | YY-MM-DD |
| Features | Alarm |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Product Status | Active |
Substitute Part Grouping Explanation
Substitute parts for the RX-8803LC:UC3 PURE SN are selected based on the following critical parameters:
Primary Substitution Criteria:
- Category: Clock/Timing (RTC Clock/Calendar)
- Interface: I2C or 2-Wire Serial
- Operating Temperature: -40°C ~ 85°C (matching range)
- Mounting Type: Surface Mount
- Time Format: HH:MM:SS support
- Date Format: YY-MM-DD or YY-MM-DD-dd support
- RoHS Status: ROHS3 Compliant
- Product Status: Active
Secondary Compatibility Factors:
- Voltage Supply Range: Overlap with 1.6V ~ 5.5V
- Package Type: Surface Mount packages (SOIC, TSSOP, MSOP variants)
- Features: Alarm capability or equivalent timing functions
Substitutes are grouped by package type and electrical characteristics. Parts with 8-pin SOIC, 8-TSSOP, or 16-SOIC packages are considered compatible when they meet the primary criteria. Parts with different operating temperature ranges or mounting types are listed but require design review.
Parameter Comparison
| Part Number | Manufacturer | Interface | Package / Case | Voltage - Supply | Operating Temperature | Time Format | Date Format | Features | RoHS Status | Product Status |
|---|---|---|---|---|---|---|---|---|---|---|
| RX-8803LC:UC3 PURE SN | EPSON | I2C | 12-TFSOJ (0.094", 2.40mm) | 1.6V ~ 5.5V | -40°C ~ 85°C | HH:MM:SS | YY-MM-DD | Alarm | ROHS3 Compliant | Active |
| 1339-31DVGI8 | Renesas Electronics | I2C, 2-Wire Serial | 8-TSSOP, 8-MSOP (0.118", 3.00mm) | 3.3V ~ 5.5V | -40°C ~ 85°C | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Alarm, Leap Year, Square Wave Output, Trickle-Charger | ROHS3 Compliant | Active |
| BQ32000DR | Texas Instruments | I2C, 2-Wire Serial | 8-SOIC (0.154", 3.90mm) | 3V ~ 3.6V | -40°C ~ 85°C | HH:MM:SS (24 hr) | YY-MM-DD-dd | Leap Year, Square Wave Output, Trickle-Charger | ROHS3 Compliant | Active |
| DS1307+ | Analog Devices Inc./Maxim Integrated | I2C, 2-Wire Serial | 8-DIP (0.300", 7.62mm) | 4.5V ~ 5.5V | 0°C ~ 70°C | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Leap Year, NVSRAM, Square Wave Output | ROHS3 Compliant | Active |
| DS1307ZN+ | Analog Devices Inc./Maxim Integrated | I2C, 2-Wire Serial | 8-SOIC (0.154", 3.90mm) | 4.5V ~ 5.5V | -40°C ~ 85°C | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Leap Year, NVSRAM, Square Wave Output | ROHS3 Compliant | Active |
| DS1308U-33+ | Analog Devices Inc./Maxim Integrated | I2C, 2-Wire Serial | 8-TSSOP, 8-MSOP (0.118", 3.00mm) | 3V ~ 5.5V | -40°C ~ 85°C | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Leap Year, NVSRAM, Square Wave Output | ROHS3 Compliant | Active |
| DS1308U-33+T | Analog Devices Inc./Maxim Integrated | I2C, 2-Wire Serial | 8-TSSOP, 8-MSOP (0.118", 3.00mm) | 3V ~ 5.5V | -40°C ~ 85°C | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Leap Year, NVSRAM, Square Wave Output | ROHS3 Compliant | Active |
| DS1338C-33#T&R | Analog Devices Inc./Maxim Integrated | I2C, 2-Wire Serial | 16-SOIC (0.295", 7.50mm) | 3V ~ 5.5V | -40°C ~ 85°C | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Leap Year, NVSRAM, Square Wave Output | ROHS3 Compliant | Active |
| DS1338Z-33+ | Analog Devices Inc./Maxim Integrated | I2C, 2-Wire Serial | 8-SOIC (0.154", 3.90mm) | 3V ~ 5.5V | -40°C ~ 85°C | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Leap Year, NVSRAM, Square Wave Output | ROHS3 Compliant | Active |
| DS1339AU+T | Analog Devices Inc./Maxim Integrated | I2C, 2-Wire Serial | 8-TSSOP, 8-MSOP (0.118", 3.00mm) | 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 | ROHS3 Compliant | Active |
| DS1340C-33# | Analog Devices Inc./Maxim Integrated | I2C, 2-Wire Serial | 16-SOIC (0.295", 7.50mm) | 2.97V ~ 5.5V | -40°C ~ 85°C | HH:MM:SS (24 hr) | YY-MM-DD-dd | Leap Year, Trickle-Charger | ROHS3 Compliant | Active |
Engineering Selection Recommendations
All listed substitute parts maintain Active product status and ROHS3 compliance, ensuring long-term availability and regulatory conformance. Selection among substitutes depends on specific design constraints:
For Direct Pin-Compatible Replacement: DS1338Z-33+ and DS1307ZN+ provide 8-SOIC packages with matching -40°C ~ 85°C operating temperature range and I2C interface. Both support 12/24-hour time format and YY-MM-DD-dd date format with additional NVSRAM and square wave output features.
For Low-Voltage Applications: DS1339AU+T supports supply voltage down to 1.71V, closely matching the RX-8803LC:UC3 PURE SN lower limit of 1.6V. This part includes alarm functionality and operates across the full -40°C ~ 85°C temperature range in an 8-TSSOP package.
For Extended Feature Set: DS1308U-33+ and DS1308U-33+T offer NVSRAM capability with 56B memory, leap year support, and square wave output in 8-TSSOP packages. Both support 3V ~ 5.5V supply range and -40°C ~ 85°C operating temperature.
For Higher Pin Count Applications: DS1338C-33#T&R and DS1340C-33# provide 16-SOIC packages with expanded functionality. DS1340C-33# includes trickle-charger capability and operates from 2.97V ~ 5.5V.
Package Consideration: The original RX-8803LC:UC3 PURE SN uses a 12-TFSOJ package. Direct package replacement is not available among listed substitutes. PCB layout modification is required for any substitute implementation.
Frequently Asked Questions (FAQ)
Q: Can DS1338Z-33+ directly replace RX-8803LC:UC3 PURE SN? A: DS1338Z-33+ matches the I2C interface, -40°C ~ 85°C operating temperature, and 3V ~ 5.5V supply range overlap. However, the package differs (8-SOIC vs. 12-TFSOJ), requiring PCB redesign. Functional compatibility is confirmed for clock/calendar and alarm operations.
Q: What is the key difference between DS1307+ and DS1307ZN+? A: DS1307+ uses an 8-DIP through-hole package with 0°C ~ 70°C operating temperature. DS1307ZN+ uses an 8-SOIC surface-mount package with -40°C ~ 85°C operating temperature, matching the RX-8803LC:UC3 PURE SN temperature range. Both share identical I2C interface and 56B NVSRAM.
Q: Why does BQ32000DR have a narrower supply voltage range? A: BQ32000DR operates from 3V ~ 3.6V, which does not cover the full 1.6V ~ 5.5V range of RX-8803LC:UC3 PURE SN. This part is suitable only for applications with fixed 3V ~ 3.6V supply. The narrower range reflects Texas Instruments' design optimization for specific voltage domains.
Q: Is DS1339AU+T suitable for battery-backed applications? A: DS1339AU+T supports battery supply from 1.3V ~ 3.7V and includes trickle-charger functionality. The main supply range of 1.71V ~ 5.5V overlaps with RX-8803LC:UC3 PURE SN. This part is suitable for battery-backed real-time clock applications.
Q: What does NVSRAM mean in the DS1338 and DS1308 series? A: NVSRAM (Non-Volatile Static RAM) provides 56 bytes of non-volatile memory for data storage beyond clock/calendar functions. RX-8803LC:UC3 PURE SN does not specify memory size, indicating no dedicated NVSRAM. DS1338 and DS1308 series offer this as an additional feature.
Q: Can I use a 16-SOIC package substitute in place of the 12-TFSOJ original? A: No direct pin-for-pin replacement is possible. DS1338C-33#T&R and DS1340C-33# use 16-SOIC packages with different pinouts. Functional substitution requires complete PCB redesign and firmware validation of the new pin assignments.
Q: Which substitute has the lowest timekeeping current consumption? A: BQ32000DR specifies 100µA @ 3.3V timekeeping current. DS1339AU+T specifies 200µA @ 1.71V ~ 5.5V. The RX-8803LC:UC3 PURE SN specifies 2.1µA ~ 3.4µA @ 3V ~ 5V, which is significantly lower than all listed substitutes. Low-power applications should prioritize the original part.
Q: Are all substitutes RoHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 Compliant status, matching the RX-8803LC:UC3 PURE SN compliance level.
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