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PCF85363ATT1/AZ Equivalent & Substitute Parts
Part Overview
The PCF85363ATT1/AZ is a Real Time Clock (RTC) IC manufactured by NXP USA Inc., designed for clock/calendar applications with I2C serial interface. This device operates across a wide supply voltage range (0.9V to 5.5V) and features integrated alarm, leap year, and watchdog timer functionality. The part is actively produced and qualified to AEC-Q100 automotive standards, with ROHS3 compliance and unlimited moisture sensitivity rating.
Substitute parts are identified when equivalent functional performance can be achieved through alternative manufacturers while maintaining compatibility with the primary electrical and mechanical parameters: I2C interface, 12/24-hour time format, YY-MM-DD-dd date format, -40°C to 85°C operating temperature range, and surface mount packaging.
Substiute Parts
Key Parameters
| Parameter | PCF85363ATT1/AZ |
|---|---|
| Manufacturer | NXP USA Inc. |
| Category | Clock/Timing |
| Type | Clock/Calendar |
| Interface | I2C, 2-Wire Serial |
| Time Format | HH:MM:SS:hh (12/24 hr) |
| Date Format | YY-MM-DD-dd |
| Memory Size | 64B |
| Voltage - Supply | 0.9V ~ 1.8V, 0.9V ~ 5.5V |
| Voltage - Supply, Battery | 0.9V ~ 5.5V |
| Current - Timekeeping (Max) | 0.885µA @ 3.3V |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
| Package / Case | 10-XFDFN Exposed Pad |
| Features | Alarm, Leap Year, Watchdog Timer |
| Product Status | Active |
| Grade | Automotive |
| Qualification | AEC-Q100 |
| RoHS Status | ROHS3 Compliant |
| MSL | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts are grouped based on strict compatibility with the following core parameters:
Primary Compatibility Criteria:
- Interface: I2C, 2-Wire Serial (mandatory)
- Time Format: 12/24-hour capability (mandatory)
- Date Format: YY-MM-DD-dd (mandatory)
- Operating Temperature: -40°C ~ 85°C (mandatory)
- Mounting Type: Surface Mount (mandatory)
- RoHS Status: ROHS3 Compliant (mandatory)
Secondary Compatibility Considerations:
- Supply voltage overlap with PCF85363ATT1/AZ range
- Memory size (64B in main part)
- Feature set (Alarm, Leap Year functionality)
- Current consumption in timekeeping mode
- Package form factor (surface mount variants)
All substitute parts listed meet the mandatory criteria. Variations in package type (8-SOIC, 16-SOIC, 20-SOIC, 8-TSSOP versus 10-XFDFN) reflect different pin counts and physical dimensions but maintain functional equivalence for I2C clock/calendar applications.
Parameter Comparison
| Parameter | PCF85363ATT1/AZ | BQ32002D | BU9873F-GTE2 | DS1337S+T&R | DS1338C-33#T&R | DS3231M+ | DS3232MZ+ | DS3232MZ+TRL | ISL12022MAIBZ | ISL1208IB8Z-TK | MCP79400-I/ST |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | NXP USA Inc. | Texas Instruments | Rohm Semiconductor | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated | Renesas Electronics Corporation | Renesas Electronics Corporation | Microchip Technology |
| 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 (12/24 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) | 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 |
| 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 ~ 85°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 | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 10-XFDFN Exposed Pad | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.173", 4.40mm Width) | 8-SOIC (0.154", 3.90mm Width) | 16-SOIC (0.295", 7.50mm Width) | 16-SOIC (0.295", 7.50mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 20-SOIC (0.295", 7.50mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-TSSOP (0.173", 4.40mm Width) |
| Memory Size | 64B | Not specified | Not specified | Not specified | 56B | Not specified | 236B | 236B | 128B | 2B | 64B |
| Voltage - Supply | 0.9V ~ 1.8V, 0.9V ~ 5.5V | 3V ~ 3.6V | 1.8V ~ 5.5V | 1.8V ~ 5.5V | 3V ~ 5.5V | 2.3V ~ 5.5V | 2.3V ~ 4.5V | 2.3V ~ 4.5V | 2.7V ~ 5.5V | 2.7V ~ 5.5V | 1.8V ~ 5.5V |
| Current - Timekeeping (Max) | 0.885µA @ 3.3V | 200µA @ 3.3V | 1µA ~ 1.35µA @ 3V ~ 5.5V | 0.6µA @ 1.3V ~ 1.8V | 125µA ~ 200µA @ 3.63V ~ 5.5V | 130µA ~ 200µA @ 3.63V ~ 5.5V | 175µA @ 2.3V ~ 4.5V | 175µA @ 2.3V ~ 4.5V | 14µA ~ 15µA @ 3V ~ 5V | 4µA ~ 6µA @ 3V ~ 5V | 1.2µA (Typ) @ 3.3V |
| Features | Alarm, Leap Year, Watchdog Timer | Leap Year, Square Wave Output, Trickle-Charger | Alarm, Leap Year | Alarm, Leap Year, Square Wave Output | Leap Year, NVSRAM, Square Wave Output | Alarm, Leap Year, Square Wave Output | Alarm, Leap Year, Square Wave Output, SRAM | Alarm, Leap Year, Square Wave Output, SRAM | Alarm, Daylight Savings, Leap Year, SRAM | Alarm, Leap Year, SRAM | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID |
| Product Status | Active | Active | Not For New Designs | Active | Active | Active | Active | Active | Active | Active | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
Active Product Status Preference: All substitute parts except BU9873F-GTE2 maintain Active product status. BU9873F-GTE2 is marked "Not For New Designs" and should be avoided for new development projects. For ongoing production support or legacy system maintenance, BU9873F-GTE2 remains functionally compatible but carries product lifecycle risk.
Compliance and Certification: All listed substitutes maintain ROHS3 compliance and operate within the -40°C to 85°C automotive temperature range. The PCF85363ATT1/AZ carries AEC-Q100 automotive qualification; substitute parts do not explicitly list this qualification in the provided data. For automotive applications requiring AEC-Q100 certification, the original PCF85363ATT1/AZ is the specified choice.
Supply Voltage Compatibility: The PCF85363ATT1/AZ operates across 0.9V to 5.5V, providing the widest supply range among all listed parts. Substitutes with narrower voltage ranges (BQ32002D: 3V-3.6V; DS3232MZ+/DS3232MZ+TRL: 2.3V-4.5V) require circuit redesign if the application depends on the full 0.9V to 5.5V operating window.
Current Consumption in Timekeeping Mode: The PCF85363ATT1/AZ operates at 0.885µA @ 3.3V, among the lowest consumption rates. DS1337S+T&R (0.6µA @ 1.3V-1.8V) and ISL1208IB8Z-TK (4µA-6µA @ 3V-5V) offer comparable or superior efficiency. Parts with higher consumption (BQ32002D: 200µA; DS1338C-33#T&R: 125µA-200µA; DS3231M+: 130µA-200µA) are suitable only for applications where power consumption is not a constraint.
Memory Configuration: The PCF85363ATT1/AZ provides 64B memory. MCP79400-I/ST also provides 64B, making it functionally equivalent in this parameter. DS3232MZ+/DS3232MZ+TRL offer 236B (expanded SRAM), ISL12022MAIBZ offers 128B, and ISL1208IB8Z-TK offers minimal 2B storage. Memory selection depends on application requirements for non-volatile storage beyond time/date registers.
Package and Pin Count Considerations: The PCF85363ATT1/AZ uses 10-XFDFN packaging. Substitute parts employ standard SOIC, TSSOP, or SOP packages with different pin counts (8, 16, or 20 pins). PCB layout and footprint compatibility must be verified before substitution. The 10-pin DFN package of the main part is not replicated in the substitute list, requiring circuit board redesign for any substitution.
Frequently Asked Questions (FAQ)
Q: Can I directly replace PCF85363ATT1/AZ with any of the listed substitutes on the same PCB?
A: No. The PCF85363ATT1/AZ uses a 10-XFDFN package, while all substitutes use different packages (8-SOIC, 16-SOIC, 20-SOIC, or 8-TSSOP). PCB footprint redesign is required. Pin assignments and I2C address configurations must be verified against the specific substitute datasheet.
Q: Which substitute offers the lowest power consumption?
A: DS1337S+T&R operates at 0.6µA @ 1.3V-1.8V, the lowest among substitutes. However, this measurement is taken at a lower voltage range than the PCF85363ATT1/AZ specification point (0.885µA @ 3.3V). For direct comparison at 3.3V operation, ISL1208IB8Z-TK (4µA-6µA @ 3V-5V) and MCP79400-I/ST (1.2µA typical @ 3.3V) are more comparable.
Q: Is BU9873F-GTE2 suitable for new product designs?
A: No. BU9873F-GTE2 is marked "Not For New Designs" by the manufacturer. It remains functionally compatible with the I2C interface and time/date format requirements but carries product lifecycle discontinuation risk. New designs should select from parts with Active status.
Q: What is the key difference between DS3232MZ+ and DS3232MZ+TRL?
A: Both are identical DS3232 devices with 236B memory and 8-SOIC packaging. The difference is packaging format: DS3232MZ+ is supplied in Tube, while DS3232MZ+TRL is supplied in Cut Tape & Digi-Reel. Electrical and functional specifications are identical. Selection depends on assembly line requirements.
Q: Does the PCF85363ATT1/AZ have automotive qualification that substitutes lack?
A: Yes. The PCF85363ATT1/AZ carries AEC-Q100 automotive qualification. The provided substitute data does not list AEC-Q100 certification for any alternative part. For automotive applications requiring AEC-Q100 compliance, the original PCF85363ATT1/AZ is the required choice.
Q: Can I use a substitute with a narrower supply voltage range if my circuit operates at 3.3V?
A: Yes, if your circuit operates exclusively at 3.3V and does not require the full 0.9V to 5.5V range of the PCF85363ATT1/AZ. Parts like BQ32002D (3V-3.6V) and DS3232MZ+/DS3232MZ+TRL (2.3V-4.5V) are compatible at fixed 3.3V operation. However, if your application requires operation across a wider voltage range, substitutes with narrower specifications will not function outside their specified limits.
Q: Which substitute provides the most memory for data storage?
A: DS3232MZ+ and DS3232MZ+TRL both provide 236B of memory, the largest among all listed parts. ISL12022MAIBZ provides 128B, DS1338C-33#T&R provides 56B, and the PCF85363ATT1/AZ provides 64B. ISL1208IB8Z-TK provides only 2B. Memory selection depends on application requirements for non-volatile storage beyond the standard time/date/alarm registers.
Q: Are all substitutes ROHS3 compliant?
A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the PCF85363ATT1/AZ specification. REACH status is "REACH Unaffected" for all parts, indicating no additional regulatory restrictions.
Q: What is the significance of the Watchdog Timer feature in the PCF85363ATT1/AZ?
A: The PCF85363ATT1/AZ includes an integrated Watchdog Timer, a feature not listed in the substitute parts provided. If your application depends on watchdog timer functionality, the PCF85363ATT1/AZ is the only option among the listed parts. Alternative substitutes would require external watchdog timer circuitry.
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