PCF8563P/F4,112 Real Time Clock IC - Equivalent & Substitute Parts

Part Overview

The PCF8563P/F4,112 is a Real Time Clock (RTC) IC manufactured by NXP USA Inc., designed for clock/calendar applications with I2C 2-Wire Serial interface in an 8-DIP through-hole package. This component provides timekeeping functionality with alarm, leap year, and watchdog timer capabilities across a wide supply voltage range of 1V to 5.5V, with ultra-low timekeeping current consumption of 0.6µA to 0.75µA at 2V to 5V.

The PCF8563P/F4,112 is classified as obsolete. Identifying equivalent and substitute parts is necessary to support legacy system maintenance, design updates, and procurement continuity when original inventory becomes unavailable.

Key Parameters

Parameter	PCF8563P/F4,112
Manufacturer	NXP USA Inc.
Type	Clock/Calendar
Interface	I2C, 2-Wire Serial
Time Format	HH:MM:SS (24 hr)
Date Format	YY-MM-DD-dd
Features	Alarm, Leap Year, Watchdog Timer
Voltage - Supply	1V ~ 5.5V
Current - Timekeeping (Max)	0.6µA ~ 0.75µA @ 2V ~ 5V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Through Hole
Package / Case	8-DIP (0.300", 7.62mm)
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the PCF8563P/F4,112 is determined by the following critical parameters:

Interface Compatibility: I2C 2-Wire Serial protocol must be maintained
Time/Date Format: HH:MM:SS (24 hr) and YY-MM-DD-dd format support
Operating Temperature Range: -40°C to 85°C minimum
Supply Voltage Range: Overlap with 1V to 5.5V range; substitutes must support at least 2.3V to 5.5V for standard operation
Timekeeping Current: Ultra-low power operation (typically 0.6µA to 200µA range)
Features: Alarm and Leap Year support are baseline requirements
Mounting Type: Through-hole packages are preferred for direct replacement; surface-mount alternatives require PCB redesign
RoHS Compliance: ROHS3 Compliant status required

Substitute parts are grouped into two categories: Direct Through-Hole Replacements (minimal PCB modification) and Surface-Mount Alternatives (requiring PCB redesign). All substitutes maintain I2C interface compatibility and support 24-hour time format with YY-MM-DD-dd date format.

Parameter Comparison

Part Number	Manufacturer	Interface	Time Format	Date Format	Voltage - Supply	Current - Timekeeping (Max)	Operating Temp	Package / Case	Mounting Type	Product Status	RoHS Status
PCF8563P/F4,112	NXP USA Inc.	I2C, 2-Wire Serial	HH:MM:SS (24 hr)	YY-MM-DD-dd	1V ~ 5.5V	0.6µA ~ 0.75µA @ 2V ~ 5V	-40°C ~ 85°C	8-DIP (0.300", 7.62mm)	Through Hole	Obsolete	ROHS3 Compliant
1337GDVGI	Renesas Electronics Corporation	I2C, 2-Wire Serial	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	1.8V ~ 5.5V	0.6µA @ 1.3V ~ 1.8V	-40°C ~ 85°C	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	Surface Mount	Active	ROHS3 Compliant
BQ32000D	Texas Instruments	I2C, 2-Wire Serial	HH:MM:SS (24 hr)	YY-MM-DD-dd	3V ~ 3.6V	100µA @ 3.3V	-40°C ~ 85°C	8-SOIC (0.154", 3.90mm Width)	Surface Mount	Active	ROHS3 Compliant
BQ32002DR	Texas Instruments	I2C, 2-Wire Serial	HH:MM:SS (24 hr)	YY-MM-DD-dd	3V ~ 3.6V	65µA @ 3.3V	-40°C ~ 85°C	8-SOIC (0.154", 3.90mm Width)	Surface Mount	Active	ROHS3 Compliant
DS1340C-33#	Analog Devices Inc./Maxim Integrated	I2C, 2-Wire Serial	HH:MM:SS (24 hr)	YY-MM-DD-dd	2.97V ~ 5.5V	150µA @ 5.5V	-40°C ~ 85°C	16-SOIC (0.295", 7.50mm Width)	Surface Mount	Active	ROHS3 Compliant
DS1388Z-3+T&R	Analog Devices Inc./Maxim Integrated	I2C, 2-Wire Serial	HH:MM:SS:hh (12/24 hr)	YY-MM-DD-dd	2.7V ~ 3.3V	140µA @ 2.7V ~ 3.3V	-40°C ~ 85°C	8-SOIC (0.154", 3.90mm Width)	Surface Mount	Active	ROHS3 Compliant
DS1388Z-33+	Analog Devices Inc./Maxim Integrated	I2C, 2-Wire Serial	HH:MM:SS:hh (12/24 hr)	YY-MM-DD-dd	2.97V ~ 3.63V	150µA @ 2.97V ~ 3.63V	-40°C ~ 85°C	8-SOIC (0.154", 3.90mm Width)	Surface Mount	Active	ROHS3 Compliant
DS3231MZ+	Analog Devices Inc./Maxim Integrated	I2C, 2-Wire Serial	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	2.3V ~ 5.5V	130µA ~ 200µA @ 3.63V ~ 5.5V	-40°C ~ 85°C	8-SOIC (0.154", 3.90mm Width)	Surface Mount	Active	ROHS3 Compliant
DS3231SN#	Analog Devices Inc./Maxim Integrated	I2C, 2-Wire Serial	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	2.3V ~ 5.5V	110µA ~ 170µA @ 3.63V ~ 5.5V	-40°C ~ 85°C	16-SOIC (0.295", 7.50mm Width)	Surface Mount	Active	ROHS3 Compliant
ISL12022IBZ-T	Renesas Electronics Corporation	I2C, 2-Wire Serial	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	2.7V ~ 5.5V	14µA ~ 15µA @ 3V ~ 5V	-40°C ~ 85°C	8-SOIC (0.154", 3.90mm Width)	Surface Mount	Active	ROHS3 Compliant
ISL12022MIBZ-T	Renesas Electronics Corporation	I2C, 2-Wire Serial	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	2.7V ~ 5.5V	14µA ~ 15µA @ 3V ~ 5V	-40°C ~ 85°C	20-SOIC (0.295", 7.50mm Width)	Surface Mount	Active	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts maintain ROHS3 compliance and support the required -40°C to 85°C operating temperature range. Selection between substitutes depends on system constraints:

For systems requiring minimal PCB modification: The 1337GDVGI (Renesas) offers the closest form factor transition from through-hole to surface mount in an 8-MSOP package. It maintains I2C interface compatibility, supports 24-hour time format, and operates across 1.8V to 5.5V supply range with ultra-low timekeeping current of 0.6µA at 1.3V to 1.8V. Product status is Active.

For 3.3V systems with extended feature requirements: The DS1388Z-3+T&R and DS1388Z-33+ (Analog Devices) provide integrated EEPROM (512B), supervisor, and trickle-charger functionality in 8-SOIC packages. Both are Active products with ROHS3 compliance. DS1388Z-3+T&R operates at 2.7V to 3.3V with 140µA timekeeping current; DS1388Z-33+ operates at 2.97V to 3.63V with 150µA timekeeping current.

For wide supply voltage range (2.3V to 5.5V): The DS3231MZ+ and DS3231SN# (Analog Devices) provide the broadest voltage compatibility with integrated alarm and square wave output features. DS3231MZ+ is packaged in 8-SOIC; DS3231SN# is packaged in 16-SOIC. Both are Active products with ROHS3 compliance.

For ultra-low power applications: The ISL12022IBZ-T and ISL12022MIBZ-T (Renesas) deliver the lowest timekeeping current at 14µA to 15µA across 3V to 5V operation, with integrated 128B SRAM and daylight savings support. Both support 2.7V to 5.5V supply range and are Active products with ROHS3 compliance. ISL12022IBZ-T uses 8-SOIC; ISL12022MIBZ-T uses 20-SOIC.

For constrained supply voltage (3V to 3.6V): The BQ32000D and BQ32002DR (Texas Instruments) are optimized for 3V to 3.6V operation with integrated trickle-charger. BQ32002DR offers lower timekeeping current (65µA) compared to BQ32000D (100µA). Both are Active products in 8-SOIC packages with ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can the PCF8563P/F4,112 be directly replaced with a surface-mount substitute without PCB redesign?

A: No. The PCF8563P/F4,112 is a through-hole 8-DIP package. All listed substitutes are surface-mount devices (8-MSOP, 8-SOIC, 16-SOIC, or 20-SOIC packages). Direct replacement requires PCB redesign to accommodate surface-mount footprints. Through-hole to surface-mount conversion involves changes to pad layout, trace routing, and assembly process.

Q: Which substitute offers the closest electrical compatibility with the original PCF8563P/F4,112?

A: The 1337GDVGI (Renesas) provides the closest electrical match with ultra-low timekeeping current of 0.6µA at 1.3V to 1.8V, matching the original's 0.6µA to 0.75µA specification. It maintains I2C 2-Wire Serial interface, supports 24-hour time format with YY-MM-DD-dd date format, and operates across -40°C to 85°C. However, it requires surface-mount implementation.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 Compliant and maintain the same regulatory compliance status as the original PCF8563P/F4,112.

Q: What is the key difference between DS1388Z-3+T&R and DS1388Z-33+?

A: Both parts are functionally equivalent with integrated EEPROM (512B), supervisor, and watchdog timer features. The primary difference is supply voltage range: DS1388Z-3+T&R operates at 2.7V to 3.3V with 140µA timekeeping current, while DS1388Z-33+ operates at 2.97V to 3.63V with 150µA timekeeping current. Selection depends on system supply voltage specifications.

Q: Why do some substitutes have higher timekeeping current than the original?

A: Timekeeping current varies based on internal circuit design, feature integration, and supply voltage optimization. Parts like DS1340C-33# (150µA @ 5.5V) and DS3231MZ+ (130µA to 200µA @ 3.63V to 5.5V) include additional features such as trickle-charger and integrated oscillator compensation, which increase current consumption. For ultra-low power applications, ISL12022IBZ-T and ISL12022MIBZ-T deliver 14µA to 15µA timekeeping current.

Q: Can I use a 16-pin substitute (DS1340C-33# or DS3231SN#) as a drop-in replacement for the 8-pin original?

A: No. The 16-pin packages (16-SOIC) have different pin counts and pinouts compared to the 8-DIP original. These parts require complete PCB redesign with new footprints and signal routing. Use 8-pin substitutes (8-MSOP, 8-SOIC) for minimal redesign effort.

Q: Which substitute is recommended for new designs?

A: For new designs, select based on system requirements: ISL12022IBZ-T or ISL12022MIBZ-T for ultra-low power; DS3231MZ+ or DS3231SN# for wide voltage range and integrated features; BQ32002DR for 3.3V systems with optimized current consumption. All are Active products with ROHS3 compliance and full manufacturer support.

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