PCF8563T/F4,112 Equivalent & Substitute Parts

Part Overview

The PCF8563T/F4,112 is a Real Time Clock (RTC) IC with Clock/Calendar functionality, featuring I2C 2-Wire Serial interface in an 8-SOIC package. This NXP component provides timekeeping with alarm, leap year support, and watchdog timer capabilities across a 1V to 5.5V supply range. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain compatibility with existing designs while ensuring continued product availability and support.

Key Parameters

Parameter	PCF8563T/F4,112
Manufacturer	NXP USA Inc.
Category	Clock/Timing
Type	Clock/Calendar
Interface	I2C, 2-Wire Serial
Package / Case	8-SOIC (0.154", 3.90mm Width)
Voltage - Supply	1V ~ 5.5V
Current - Timekeeping (Max)	0.6µA ~ 0.75µA @ 2V ~ 5V
Operating Temperature	-40°C ~ 85°C
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	Discontinued at DiGi Electronics

Substitute Part Grouping Explanation

Substitution of the PCF8563T/F4,112 is determined by the following critical parameters:

Interface Compatibility: I2C 2-Wire Serial protocol is mandatory for direct replacement without firmware modification.

Package Compatibility: 8-SOIC (0.154", 3.90mm Width) package ensures PCB layout compatibility. Parts in alternative packages (8-TSSOP, 8-MSOP, 8-TDFN) require PCB redesign.

Supply Voltage Range: The original part operates from 1V to 5.5V. Substitutes must support the minimum voltage requirement of the application. Parts with narrower ranges (e.g., 2.7V minimum) are suitable only for applications not requiring sub-2V operation.

Timekeeping Current: The PCF8563T/F4,112 draws 0.6µA to 0.75µA during timekeeping. Substitutes with significantly higher current consumption (e.g., 200µA) impact battery life in low-power applications.

Time Format: The original part uses 24-hour format. Substitutes supporting both 12/24-hour formats maintain compatibility.

Regulatory Compliance: ROHS3 compliance and REACH unaffected status are required for equivalent substitution.

Product Status: Active status ensures ongoing availability and manufacturer support.

Parameter Comparison

Parameter	PCF8563T/F4,112	PCF8563T/F4,118	1338-31DVGI	DS1307ZN+	DS1338U-3+T&R	DS1339AD+T	DS1339U-2+T&R	DS1339U-33+	DS1340U-33+	DS1341U+	ISL12026AIVZ
Manufacturer	NXP USA Inc.	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	Analog Devices Inc./Maxim	Analog Devices Inc./Maxim	Renesas Electronics
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
Package / Case	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-TSSOP, 8-MSOP (0.118", 3.00mm)	8-SOIC (0.154", 3.90mm)	8-TSSOP, 8-MSOP (0.118", 3.00mm)	8-TDFN EP	8-TSSOP, 8-MSOP (0.118", 3.00mm)	8-TSSOP, 8-MSOP (0.118", 3.00mm)	8-TSSOP, 8-MSOP (0.118", 3.00mm)	8-TSSOP, 8-MSOP (0.118", 3.00mm)	8-TSSOP (0.173", 4.40mm)
Voltage - Supply	1V ~ 5.5V	1V ~ 5.5V	3.3V ~ 5.5V	4.5V ~ 5.5V	2.7V ~ 5.5V	1.71V ~ 5.5V	1.8V ~ 5.5V	2.97V ~ 5.5V	2.97V ~ 5.5V	1.8V ~ 5.5V	2.7V ~ 5.5V
Current - Timekeeping (Max)	0.6µA ~ 0.75µA @ 2V ~ 5V	0.6µA ~ 0.75µA @ 2V ~ 5V	5µA @ 3.63V ~ 5.5V	200µA @ 5V	200µA @ 3.3V	200µA @ 1.71V ~ 5.5V	100µA @ 2.2V	200µA @ 5.5V	150µA @ 5.5V	0.5µA ~ 0.6µA @ 3V ~ 5V	10µA ~ 20µA @ 2.7V ~ 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 ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Time Format	HH:MM:SS (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 (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
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	Discontinued at DiGi Electronics	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Package Replacement (8-SOIC): PCF8563T/F4,118 and DS1307ZN+ maintain the original 8-SOIC package footprint. PCF8563T/F4,118 is the primary recommendation as an NXP part with identical electrical specifications and active product status. DS1307ZN+ provides an alternative from Analog Devices Inc./Maxim Integrated with the same package but requires evaluation of higher timekeeping current (200µA vs. 0.6µA–0.75µA).

Low-Power Applications: DS1341U+ matches the ultra-low timekeeping current specification (0.5µA–0.6µA) of the original part but requires PCB redesign due to 8-TSSOP/8-MSOP package. This part is suitable for battery-powered applications where power consumption is critical.

Extended Supply Voltage Range: DS1339AD+T supports the widest supply voltage range (1.71V–5.5V), approaching the original part's 1V minimum. This part requires PCB redesign for 8-TDFN package.

Narrow Supply Voltage Range: 1338-31DVGI (3.3V–5.5V) and DS1307ZN+ (4.5V–5.5V) are unsuitable for applications requiring operation below their minimum supply voltages.

Compliance & Availability: All listed substitutes maintain ROHS3 compliance and REACH unaffected status. All substitutes except the original part carry active product status, ensuring manufacturer support and continued availability.

Frequently Asked Questions (FAQ)

Q: Can I use DS1307ZN+ as a direct replacement for PCF8563T/F4,112?

A: DS1307ZN+ maintains the same 8-SOIC package and I2C interface, enabling direct PCB placement. However, timekeeping current is 200µA at 5V compared to 0.6µA–0.75µA for the original part. This 267× increase in current consumption significantly impacts battery life in low-power applications. Supply voltage range is also narrower (4.5V–5.5V vs. 1V–5.5V), limiting use in low-voltage designs.

Q: What is the primary advantage of PCF8563T/F4,118 over other substitutes?

A: PCF8563T/F4,118 is manufactured by NXP, the original supplier, and provides identical electrical specifications including ultra-low timekeeping current (0.6µA–0.75µA), wide supply voltage range (1V–5.5V), and 24-hour time format. The 8-SOIC package matches the original footprint, eliminating PCB redesign. Active product status ensures ongoing availability.

Q: Why do some substitutes require PCB redesign?

A: Substitutes in 8-TSSOP, 8-MSOP, 8-TDFN, or alternative TSSOP packages have different pin layouts and physical dimensions than the original 8-SOIC package. PCB redesign is necessary to accommodate the new footprint, including trace routing and component placement adjustments.

Q: Is DS1341U+ suitable for my battery-powered application?

A: DS1341U+ provides timekeeping current of 0.5µA–0.6µA at 3V–5V, matching the original part's ultra-low power consumption. However, the 8-TSSOP/8-MSOP package requires PCB redesign. Supply voltage range (1.8V–5.5V) is narrower than the original (1V–5.5V), limiting operation in sub-1.8V applications.

Q: What is the impact of higher timekeeping current on battery life?

A: Timekeeping current directly determines battery drain during standby operation. A part drawing 200µA (e.g., DS1307ZN+) depletes a typical coin cell battery approximately 267 times faster than a part drawing 0.75µA (e.g., PCF8563T/F4,112). For applications requiring multi-year battery life, low-current parts are essential.

Q: Can I use 1338-31DVGI in a 2V supply application?

A: No. 1338-31DVGI has a minimum supply voltage of 3.3V and cannot operate reliably below this threshold. Applications requiring 2V operation must use parts with lower minimum voltage specifications, such as PCF8563T/F4,118 (1V minimum) or DS1341U+ (1.8V minimum).

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitutes maintain ROHS3 compliance and REACH unaffected status, meeting regulatory requirements for electronic component procurement in regulated markets.

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