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PCF8563BS/4,118 Equivalent & Substitute Parts
Part Overview
The PCF8563BS/4,118 is a Real Time Clock (RTC) IC manufactured by NXP USA Inc., designed for clock/calendar applications with I2C 2-Wire Serial interface. This 10-VFDFN Exposed Pad device operates across a wide supply voltage range of 1V to 5.5V and features alarm, leap year, and watchdog timer capabilities. The part is currently in active product status with 13,875 units in stock. Substitute parts are identified when equivalent functional performance can be achieved through alternative manufacturers while maintaining critical electrical and mechanical compatibility parameters.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | NXP USA Inc. |
| Part Number | PCF8563BS/4,118 |
| Category | Clock/Timing |
| Type | Clock/Calendar |
| Interface | I2C, 2-Wire Serial |
| Voltage Supply Range | 1V ~ 5.5V |
| Current - Timekeeping (Max) | 0.6µA ~ 0.75µA @ 2V ~ 5V |
| Operating Temperature | -40°C ~ 85°C |
| Package / Case | 10-VFDFN Exposed Pad |
| Mounting Type | Surface Mount |
| Features | Alarm, Leap Year, Watchdog Timer |
| Time Format | HH:MM:SS (24 hr) |
| Date Format | YY-MM-DD-dd |
| RoHS Status | ROHS3 Compliant |
| Product Status | Active |
Substitute Part Grouping Explanation
Substitution of the PCF8563BS/4,118 is determined by the following critical parameters:
Interface Compatibility: All substitute parts must support I2C 2-Wire Serial interface to maintain firmware and circuit compatibility.
Voltage Supply Range: The PCF8563BS/4,118 operates from 1V to 5.5V. Substitute parts must support overlapping or equivalent voltage ranges to function in the same application circuit.
Operating Temperature Range: All parts must support the -40°C to 85°C operating temperature range to ensure reliability across the same environmental conditions.
Time and Date Format: The 24-hour HH:MM:SS time format and YY-MM-DD-dd date format must be supported or compatible with the application firmware.
Package and Mounting: Surface mount packages are required. Package dimensions and pin configurations must be compatible with the PCB layout.
Features: Alarm and Leap Year functionality are core features. Watchdog Timer presence is noted but not mandatory for substitution if other critical parameters align.
RoHS and Compliance: All substitute parts must maintain ROHS3 compliance and equivalent regulatory status.
Substitute parts are grouped into two categories based on package type: 8-pin packages (8-SOIC, 8-TSSOP/8-MSOP, 8-uMAX) and larger packages (20-pin and 28-pin variants). The 8-pin variants offer closest form-factor compatibility, while larger packages provide additional memory and features at the cost of increased PCB footprint.
Parameter Comparison
| Parameter | PCF8563BS/4,118 | 1338-31DVGI | DS1307Z+T&R | DS1308U-18+ | DS1338Z-18+ | DS1341U+T&R | DS1388Z-33+T&R | ISL12020MIRZ-T7A | ISL12022MIBZ-TR5421 | ISL12057IBZ-T | M41ST85WMH6F |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | NXP USA Inc. | Renesas Electronics | Analog Devices Inc./Maxim | Analog Devices Inc./Maxim | Analog Devices Inc./Maxim | Analog Devices Inc./Maxim | Analog Devices Inc./Maxim | Renesas Electronics | Renesas Electronics | Renesas Electronics | STMicroelectronics |
| 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 |
| Voltage Supply Range | 1V ~ 5.5V | 3.3V ~ 5.5V | 4.5V ~ 5.5V | 1.71V ~ 5.5V | 1.71V ~ 5.5V | 1.8V ~ 5.5V | 2.97V ~ 3.63V | 2.7V ~ 5.5V | 2.7V ~ 5.5V | 1.8V ~ 3.6V | 2.7V ~ 3.6V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | 0°C ~ 70°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 |
| Time Format | 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:hh (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) |
| 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 |
| Package / Case | 10-VFDFN Exposed Pad | 8-TSSOP, 8-MSOP | 8-SOIC | 8-TSSOP, 8-MSOP | 8-SOIC | 8-TSSOP, 8-MSOP | 8-SOIC | 20-PowerLFDFN | 20-SOIC | 8-SOIC | 28-SOP with SNAPHAT |
| 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 | Active | Active | Active | Active | Active | Active | Active | Active |
Engineering Selection Recommendations
Best Form-Factor Compatibility (8-Pin Packages):
DS1341U+T&R and DS1338Z-18+ from Analog Devices Inc./Maxim Integrated offer the closest electrical compatibility with the PCF8563BS/4,118. Both support the full -40°C to 85°C operating temperature range, I2C 2-Wire Serial interface, and 24-hour time format. DS1341U+T&R operates from 1.8V to 5.5V with ultra-low timekeeping current of 0.5µA to 0.6µA, matching the PCF8563BS/4,118 performance profile. DS1338Z-18+ operates from 1.71V to 5.5V with 100µA timekeeping current and includes NVSRAM and Square Wave Output features.
ISL12057IBZ-T from Renesas Electronics provides an alternative 8-SOIC package option with 1.8V to 3.6V supply range and 0.65µA timekeeping current at 1.8V. This part is suitable for low-voltage applications but has a narrower supply voltage range than the original part.
Extended Feature Variants (20-Pin Packages):
ISL12022MIBZ-TR5421 and ISL12020MIRZ-T7A from Renesas Electronics provide 128B memory with alarm, daylight savings, leap year, and SRAM features. Both operate from 2.7V to 5.5V with 14µA to 15µA timekeeping current and support the full -40°C to 85°C temperature range. These parts require larger PCB footprint but offer additional functionality.
High-Integration Option (28-Pin Package):
M41ST85WMH6F from STMicroelectronics is a 28-pin variant with 44B memory, supervisor, and watchdog timer functions. It operates from 2.7V to 3.6V and requires a narrower supply voltage range than the original part. This option is suitable only for applications with fixed 3.3V supply rails.
Voltage Range Limitations:
DS1307Z+T&R operates from 4.5V to 5.5V only and does not support the lower voltage range of the PCF8563BS/4,118. This part is not recommended for applications requiring operation below 4.5V.
1338-31DVGI operates from 3.3V to 5.5V, which excludes operation in the 1V to 3.3V range of the original part.
All substitute parts maintain ROHS3 compliance and active product status, ensuring long-term availability and regulatory compliance.
Frequently Asked Questions (FAQ)
Q: Can DS1341U+T&R directly replace PCF8563BS/4,118 in all applications?
A: DS1341U+T&R is electrically compatible with the PCF8563BS/4,118 across the critical parameters: I2C 2-Wire Serial interface, -40°C to 85°C operating temperature, 1.8V to 5.5V supply voltage, and 24-hour time format. However, package differences (8-TSSOP/8-MSOP versus 10-VFDFN) require PCB layout verification. Pin-to-pin compatibility must be confirmed with the application schematic before substitution.
Q: What is the key difference between 8-pin and 20-pin RTC substitutes?
A: 8-pin packages (DS1307Z+T&R, DS1308U-18+, DS1338Z-18+, DS1341U+T&R, ISL12057IBZ-T) provide core clock/calendar functionality with minimal memory. 20-pin packages (ISL12022MIBZ-TR5421, ISL12020MIRZ-T7A) add 128B SRAM memory and daylight savings time support. Selection depends on application memory requirements and available PCB space.
Q: Which substitute part has the lowest timekeeping current consumption?
A: DS1341U+T&R and PCF8563BS/4,118 both achieve 0.5µA to 0.75µA timekeeping current, making them the lowest-power options. ISL12057IBZ-T achieves 0.65µA at 1.8V. These ultra-low-power parts are preferred for battery-backed applications.
Q: Is DS1307Z+T&R suitable for the full temperature range of the original part?
A: No. DS1307Z+T&R operates from 0°C to 70°C, which does not cover the -40°C to 85°C range of the PCF8563BS/4,118. This part is not recommended for applications requiring full temperature range operation.
Q: Can I use M41ST85WMH6F as a direct substitute?
A: M41ST85WMH6F is not a direct substitute due to package size (28-SOP versus 10-VFDFN) and narrower supply voltage range (2.7V to 3.6V versus 1V to 5.5V). It is suitable only for applications with fixed 3.3V supply and available PCB space for a 28-pin package.
Q: What are the voltage range constraints for each substitute?
A: DS1341U+T&R (1.8V ~ 5.5V), DS1338Z-18+ (1.71V ~ 5.5V), and DS1308U-18+ (1.71V ~ 5.5V) support the widest ranges closest to the original. ISL12057IBZ-T (1.8V ~ 3.6V) is limited to lower voltages. ISL12022MIBZ-TR5421 and ISL12020MIRZ-T7A (2.7V ~ 5.5V) exclude sub-2.7V operation. DS1307Z+T&R (4.5V ~ 5.5V) and M41ST85WMH6F (2.7V ~ 3.6V) have the most restrictive ranges.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitute parts maintain ROHS3 compliance and equivalent regulatory status to the PCF8563BS/4,118, ensuring environmental and safety standard alignment.
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