DP8573AN Real Time Clock IC - Equivalent & Substitute Parts

Part Overview

The DP8573AN is a Real Time Clock (RTC) IC with Clock/Calendar functionality manufactured by Texas Instruments in a 24-DIP (0.300", 7.62mm) through-hole package. This device provides parallel interface timekeeping with alarm and leap year capabilities, operating across a 4.5V to 5.5V supply range with battery backup support from 2.2V to 5.1V.

The DP8573AN is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure component availability for production, and support legacy system maintenance where direct replacements are unavailable.

Key Parameters

Parameter	DP8573AN Value
Manufacturer	Texas Instruments
Category	Clock/Timing
Type	Clock/Calendar
Package / Case	24-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Interface	Parallel
Voltage - Supply	4.5V ~ 5.5V
Voltage - Supply, Battery	2.2V ~ 5.1V
Time Format	HH:MM:SS:hh (12/24 hr)
Date Format	YY-MM-DD-dd
Features	Alarm, Leap Year
Operating Temperature	-40°C ~ 85°C
Current - Timekeeping (Max)	1µA @ 5V
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitute parts for the DP8573AN are selected based on strict compatibility criteria derived from the allowed electrical and mechanical parameters:

Primary Substitution Criteria:

Parallel interface requirement (eliminates serial-only devices)
Operating voltage range compatibility (4.5V ~ 5.5V primary supply)
Through-hole or surface-mount mounting compatibility with circuit board design
Time and date format support (HH:MM:SS and YY-MM-DD minimum)
Operating temperature range overlap (-40°C ~ 85°C)
Alarm and leap year feature availability

Substitution Logic: Substitute parts are grouped by mounting type and package form factor. Through-hole mounted devices (24-DIP, 28-DIP, 32-DIP modules) provide direct PCB compatibility with the DP8573AN. Surface-mount alternatives (28-SOIC, 24-TSSOP, 28-PLCC) require adapter solutions or board redesign but offer functional equivalence through identical parallel interface, timing format support, and feature sets.

Parts with active product status and ROHS3 compliance are preferred for new designs and long-term availability assurance.

Parameter Comparison

Part Number	Manufacturer	Package / Case	Mounting Type	Voltage - Supply	Voltage - Battery	Time Format	Date Format	Interface	Features	Operating Temp	Product Status	RoHS Status
DP8573AN	Texas Instruments	24-DIP (0.300", 7.62mm)	Through Hole	4.5V ~ 5.5V	2.2V ~ 5.1V	HH:MM:SS:hh (12/24 hr)	YY-MM-DD-dd	Parallel	Alarm, Leap Year	-40°C ~ 85°C	Obsolete	RoHS non-compliant
DS12885QN+	Analog Devices Inc./Maxim Integrated	28-LCC (J-Lead)	Surface Mount	4.5V ~ 5.5V	2.5V ~ 4V	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output	-40°C ~ 85°C	Active	ROHS3 Compliant
DS12CR887-33+	Analog Devices Inc./Maxim Integrated	24-DIP Module (0.600", 15.24mm)	Through Hole	2.97V ~ 3.63V	2V ~ 3.05V	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	Alarm, Leap Year, NVSRAM, Square Wave Output, Trickle-Charger	-40°C ~ 85°C	Active	ROHS3 Compliant
DS1501WZ+T&R	Analog Devices Inc./Maxim Integrated	28-SOIC (0.295", 7.50mm Width)	Surface Mount	3V ~ 3.6V	2.5V ~ 3.7V	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	Alarm, Leap Year, NVSRAM, Square Wave Output, Watchdog Timer, Y2K	0°C ~ 70°C	Active	ROHS3 Compliant
DS1501WZN+	Analog Devices Inc./Maxim Integrated	28-SOIC (0.295", 7.50mm Width)	Surface Mount	3V ~ 3.6V	2.5V ~ 3.7V	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	Alarm, Leap Year, NVSRAM, Square Wave Output, Watchdog Timer, Y2K	-40°C ~ 85°C	Active	ROHS3 Compliant
DS1554-70+	Analog Devices Inc./Maxim Integrated	32-DIP Module (0.600", 15.24mm)	Through Hole	4.5V ~ 5.5V	—	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	Alarm, Leap Year, NVSRAM, Watchdog Timer, Y2K	0°C ~ 70°C	Active	ROHS3 Compliant
DS1556WP-120IND+	Analog Devices Inc./Maxim Integrated	34-PowerCap™ Module	Surface Mount	2.97V ~ 3.63V	3V	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	Alarm, Leap Year, NVSRAM, Watchdog Timer, Y2K	-40°C ~ 85°C	Active	ROHS3 Compliant
DS1685EN-3+T&R	Analog Devices Inc./Maxim Integrated	24-TSSOP (0.173", 4.40mm Width)	Surface Mount	2.7V ~ 3.7V	2.5V ~ 3.7V	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	Alarm, NVSRAM, Square Wave Output, Y2K	-40°C ~ 85°C	Active	ROHS3 Compliant
DS17285SN-5+	Analog Devices Inc./Maxim Integrated	24-SOIC (0.295", 7.50mm Width)	Surface Mount	4.5V ~ 5.5V	2.5V ~ 3.7V	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	Parallel	Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output	-40°C ~ 85°C	Active	ROHS3 Compliant
DS1746W-120+	Analog Devices Inc./Maxim Integrated	32-DIP Module (0.600", 15.24mm)	Through Hole	2.97V ~ 3.63V	—	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	Leap Year, NVSRAM, Y2K	0°C ~ 70°C	Active	ROHS3 Compliant
M48T18-150PC1	STMicroelectronics	28-DIP Module (0.600", 15.24mm)	Through Hole	4.5V ~ 5.5V	—	HH:MM:SS (24 hr)	YY-MM-DD-dd	Parallel	Leap Year, Watchdog Timer	0°C ~ 70°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Through-Hole Replacement (Preferred for Legacy Systems):

DS12CR887-33+ provides the closest functional match with through-hole 24-DIP module packaging. This part maintains parallel interface compatibility, supports 12/24-hour time format and YY-MM-DD date format, and includes alarm and leap year features. The device operates at -40°C to 85°C, matching the DP8573AN temperature range. However, the supply voltage range differs (2.97V ~ 3.63V versus 4.5V ~ 5.5V), requiring voltage regulation verification in existing designs.

M48T18-150PC1 (STMicroelectronics Timekeeper® series) offers through-hole 28-DIP module packaging with 4.5V ~ 5.5V supply compatibility, matching the DP8573AN primary voltage range. This part supports parallel interface, 24-hour time format, and leap year functionality. Operating temperature range is 0°C ~ 70°C, which is narrower than the DP8573AN specification.

For Active Product Status and Compliance:

All listed substitute parts carry active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment for new designs. The DP8573AN is RoHS non-compliant and obsolete, making substitution necessary for production continuity.

For Surface-Mount Designs:

DS17285SN-5+ (24-SOIC) maintains 4.5V ~ 5.5V supply voltage compatibility with the DP8573AN and supports 12/24-hour time format with alarm and leap year features across the full -40°C ~ 85°C temperature range. This part requires PCB redesign or adapter solutions but provides modern surface-mount integration.

DS1501WZN+ (28-SOIC) extends operating temperature to -40°C ~ 85°C and includes additional features (watchdog timer, Y2K support) but operates at 3V ~ 3.6V, requiring voltage conversion from 5V systems.

Frequently Asked Questions (FAQ)

Q: Can DS12CR887-33+ directly replace DP8573AN in a 5V system?

A: DS12CR887-33+ operates at 2.97V ~ 3.63V supply voltage, not 4.5V ~ 5.5V. Direct substitution in a 5V system requires voltage regulation to step down the supply to 3.3V. The parallel interface, time/date formats, and alarm/leap year features are compatible.

Q: What is the key difference between through-hole and surface-mount substitutes?

A: Through-hole substitutes (DS12CR887-33+, M48T18-150PC1, DS1554-70+, DS1746W-120+) mount directly into existing PCB holes without redesign. Surface-mount substitutes (DS17285SN-5+, DS1501WZN+, DS12885QN+, DS1685EN-3+T&R, DS1556WP-120IND+) require PCB layout changes or adapter boards but offer compact form factors and modern manufacturing compatibility.

Q: Why do some substitutes lack battery backup voltage specification?

A: Parts listed with "—" for battery voltage (DS1554-70+, DS1746W-120+, M48T18-150PC1) do not support battery-backed operation. These devices are suitable only for applications where continuous main power supply is guaranteed. The DP8573AN supports battery backup from 2.2V ~ 5.1V, so applications requiring this feature must select alternatives with specified battery voltage ranges.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance status. The DP8573AN is RoHS non-compliant. Substitution ensures regulatory compliance for new production and updated designs.

Q: What is the operating temperature consideration for DS1501 variants?

A: DS1501WZ+T&R operates 0°C ~ 70°C. DS1501WZN+ extends to -40°C ~ 85°C. For applications requiring the full DP8573AN temperature range (-40°C ~ 85°C), DS1501WZN+ is the appropriate selection.

Q: Can I use a 32-DIP module substitute in a 24-DIP socket?

A: No. 32-DIP modules (DS1554-70+, DS1746W-120+) have different pin counts and physical dimensions than 24-DIP packages. These require new PCB designs or adapter solutions. Direct socket compatibility exists only with 24-DIP or 28-DIP module packages.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message