DP8573AV Equivalent & Substitute Parts

Part Overview

The DP8573AV is a Real Time Clock (RTC) IC with Clock/Calendar functionality in a 28-LCC (J-Lead) package, manufactured by Texas Instruments. This parallel interface RTC provides timekeeping with alarm and leap year features, operating across a 4.5V to 5.5V supply range with battery backup capability from 2.2V to 5.1V.

The DP8573AV is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity, ensure component availability, and support ongoing production requirements for systems utilizing this RTC functionality.

Key Parameters

Parameter	DP8573AV Value
Manufacturer	Texas Instruments
Product Status	Obsolete
Type	Clock/Calendar
Interface	Parallel
Package / Case	28-LCC (J-Lead)
Voltage - Supply	4.5V ~ 5.5V
Voltage - Supply, Battery	2.2V ~ 5.1V
Current - Timekeeping (Max)	1µA @ 5V
Operating Temperature	-40°C ~ 85°C
Features	Alarm, Leap Year
Time Format	HH:MM:SS:hh (12/24 hr)
Date Format	YY-MM-DD-dd
Mounting Type	Surface Mount
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the DP8573AV is determined by the following critical parameters:

Primary Compatibility Criteria:

Parallel interface requirement
Clock/Calendar functionality with alarm and leap year support
Operating voltage range compatibility (4.5V ~ 5.5V primary supply)
Surface mount technology
Time and date format support (HH:MM:SS and YY-MM-DD)

Substitution Categories:

Direct Package Match (28-LCC / 28-PLCC): DP8573AV/NOPB and DS1685Q-5+ maintain identical 28-LCC packaging, enabling direct socket replacement with minimal PCB layout modification.

Functional Equivalents with Package Variation: DS1685S-5+, DS1501WZ+T&R, DS1501WZN+, DS1558Y+TRL, DS1685EN-3+T&R, DS17285S-3+T&R, and DS1744P-70+ provide equivalent RTC Clock/Calendar functionality with parallel interface but utilize different surface mount packages (24-SOIC, 28-SOIC, 48-LQFP, 24-TSSOP, 34-PowerCap Module). These require PCB redesign.

Through-Hole Alternative: DS1554W-120IND+ offers RTC Clock/Calendar functionality in a 32-DIP Module package for applications requiring through-hole mounting.

Parameter Comparison

Parameter	DP8573AV	DP8573AV/NOPB	DS1685Q-5+	DS1685S-5+	DS1501WZ+T&R	DS1501WZN+	DS1558Y+TRL	DS1685EN-3+T&R	DS17285S-3+T&R	DS1554W-120IND+	DS1744P-70+
Manufacturer	Texas Instruments	Texas Instruments	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	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
Type	Clock/Calendar	Clock/Calendar	Clock/Calendar	Clock/Calendar	Clock/Calendar	Clock/Calendar	Clock/Calendar	Clock/Calendar	Clock/Calendar	Clock/Calendar	Clock/Calendar
Interface	Parallel	Parallel	Parallel	Parallel	Parallel	Parallel	Parallel	Parallel	Parallel	Parallel	Parallel
Package / Case	28-LCC (J-Lead)	28-LCC (J-Lead)	28-LCC (J-Lead)	24-SOIC	28-SOIC	28-SOIC	48-LQFP	24-TSSOP	24-SOIC	32-DIP Module	34-PowerCap™ Module
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Through Hole	Surface Mount
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	3V ~ 3.6V	3V ~ 3.6V	4.5V ~ 5.5V	2.7V ~ 3.7V	2.7V ~ 3.7V	2.97V ~ 3.63V	4.5V ~ 5.5V
Voltage - Supply, Battery	2.2V ~ 5.1V	2.2V ~ 5.1V	2.5V ~ 3.7V	2.5V ~ 3.7V	2.5V ~ 3.7V	2.5V ~ 3.7V	2.5V ~ 3.7V	2.5V ~ 3.7V	2.5V ~ 3.7V	Not Specified	3V
Current - Timekeeping (Max)	1µA @ 5V	1µA @ 5V	3mA @ 5V	3mA @ 5V	4mA @ 3V ~ 3.6V	4mA @ 3V ~ 3.6V	6mA @ 5V	2mA @ 3V	2mA @ 2.7V ~ 3.7V	4mA @ 3.3V	4mA @ 5V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C	0°C ~ 70°C
Features	Alarm, Leap Year	Alarm, Leap Year	Alarm, NVSRAM, Square Wave Output, Y2K	Alarm, NVSRAM, Square Wave Output, Y2K	Alarm, Leap Year, NVSRAM, Square Wave Output, Watchdog Timer, Y2K	Alarm, Leap Year, NVSRAM, Square Wave Output, Watchdog Timer, Y2K	Alarm, Leap Year, Watchdog Timer, Y2K	Alarm, NVSRAM, Square Wave Output, Y2K	Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output	Alarm, Leap Year, NVSRAM, Watchdog Timer, Y2K	Leap Year, NVSRAM, Y2K
Time Format	HH:MM:SS:hh (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 (24 hr)	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 (24 hr)	HH:MM:SS (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
Memory Size	Not Specified	Not Specified	242B	242B	256B	256B	Not Specified	242B	2KB	32KB	32KB
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Replacement (No PCB Modification Required):

DP8573AV/NOPB is the primary direct substitute. It maintains identical 28-LCC packaging and electrical specifications while offering active product status and ROHS3 compliance. This part is recommended for applications requiring immediate obsolescence mitigation with minimal design changes.

DS1685Q-5+ provides equivalent 28-LCC packaging with active status and ROHS3 compliance. Operating temperature range is limited to 0°C ~ 70°C compared to the DP8573AV's -40°C ~ 85°C specification. This part is suitable for commercial temperature range applications.

Functional Equivalents (PCB Redesign Required):

DS1685S-5+ offers 24-SOIC packaging with active status and ROHS3 compliance. Operating temperature range is 0°C ~ 70°C. This part requires PCB layout modification but maintains 4.5V ~ 5.5V supply compatibility.

DS1501WZ+T&R and DS1501WZN+ provide 28-SOIC packaging with extended memory (256B) and additional features including watchdog timer. DS1501WZN+ supports the full -40°C ~ 85°C temperature range. Both require PCB redesign and operate at 3V ~ 3.6V supply voltage.

DS1558Y+TRL offers 48-LQFP packaging with 4.5V ~ 5.5V supply compatibility and -40°C ~ 85°C operating temperature. This part requires significant PCB redesign due to package size and pin count differences.

DS1685EN-3+T&R provides 24-TSSOP packaging with reduced power consumption (2mA @ 3V) and operates across 2.7V ~ 3.7V supply range. Full -40°C ~ 85°C temperature range is supported.

DS17285S-3+T&R offers 24-SOIC packaging with extended memory (2KB) and daylight savings feature. Operating range is 0°C ~ 70°C with 2.7V ~ 3.7V supply voltage.

Alternative Mounting Technology:

DS1554W-120IND+ provides through-hole 32-DIP Module packaging with 32KB memory and -40°C ~ 85°C operating temperature. This part is suitable for applications requiring through-hole assembly or legacy board designs.

DS1744P-70+ offers 34-PowerCap™ Module packaging with 32KB memory and 4.5V ~ 5.5V supply compatibility. Operating temperature is limited to 0°C ~ 70°C.

All substitute parts maintain parallel interface architecture and Clock/Calendar functionality with alarm and leap year support. Selection should prioritize product status (active), compliance certifications (ROHS3), and operating temperature requirements specific to the target application.

Frequently Asked Questions (FAQ)

Q: Can DP8573AV/NOPB be used as a direct replacement for DP8573AV?

A: Yes. DP8573AV/NOPB is a direct substitute with identical 28-LCC packaging, electrical specifications, and functional characteristics. The primary difference is product status (active vs. obsolete) and RoHS compliance (ROHS3 vs. non-compliant). No PCB modifications are required.

Q: What are the key differences between 28-LCC and 28-SOIC packages?

A: Both are 28-pin surface mount packages but differ in physical dimensions and pin pitch. 28-LCC (J-Lead) uses a 11.51x11.51mm footprint, while 28-SOIC uses a 0.295" width (7.50mm). These packages are not mechanically interchangeable and require different PCB footprints.

Q: Which substitute parts maintain the 4.5V ~ 5.5V supply voltage range?

A: DP8573AV/NOPB, DS1685Q-5+, DS1685S-5+, DS1558Y+TRL, and DS1744P-70+ all operate within the 4.5V ~ 5.5V supply range. Parts such as DS1501WZ+T&R, DS1501WZN+, DS1685EN-3+T&R, and DS17285S-3+T&R require 3V ~ 3.7V supply voltage and are not compatible with 5V systems without voltage regulation.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts listed are ROHS3 compliant. The original DP8573AV is RoHS non-compliant. If RoHS compliance is a design requirement, any substitute part will satisfy this requirement.

Q: What is the operating temperature range for each substitute?

A: DP8573AV/NOPB, DS1501WZN+, DS1558Y+TRL, DS1685EN-3+T&R, and DS1554W-120IND+ support -40°C ~ 85°C. DS1685Q-5+, DS1685S-5+, DS1501WZ+T&R, DS17285S-3+T&R, and DS1744P-70+ are limited to 0°C ~ 70°C. Application temperature requirements determine which parts are suitable.

Q: Do all substitute parts support both 12-hour and 24-hour time formats?

A: DP8573AV/NOPB, DS1685Q-5+, DS1685S-5+, and DS1685EN-3+T&R support both 12-hour and 24-hour formats. DS1501WZ+T&R, DS1501WZN+, DS1558Y+TRL, DS17285S-3+T&R, DS1554W-120IND+, and DS1744P-70+ support 24-hour format only.

Q: Which substitute parts offer additional memory capacity?

A: DS1501WZ+T&R and DS1501WZN+ provide 256B memory. DS17285S-3+T&R offers 2KB memory. DS1554W-120IND+ and DS1744P-70+ provide 32KB memory. The original DP8573AV memory size is not specified. Additional memory enables extended data logging or configuration storage capabilities.

Q: What packaging options are available for through-hole assembly?

A: DS1554W-120IND+ is the only substitute part with through-hole mounting, utilizing a 32-DIP Module package. All other substitutes are surface mount devices.

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