DS1643-85+ Overview
real time clocks is located in package 28-DIP Module (0.600, 15.24mm).As of Tube, time clock is packaged in this way.There is 4.5V~5.5V voltage supply for this electrical RTC.It can be said that this electrical real time clock belongs to the Clock/Calendar type.The real time clock (RTC) that is mounted in the way of Through Hole is connected to this circuit board.In order to operate properly, the temperature should be 0°C~70°C.During the course of operation, Leap Year, NVSRAM can be ensured.There is the possibility of terminating transmission lines with 34 terminations, which means that the equipment used to terminate the line will match its characteristic impedance.In this case, the voltage supplied to the electronic component is 5V.A total of 34 pins are included in this product.DS1643 are the family name of RTCs .For the purpose of storing data and programs, the RTC times are embedded with a storage capacity of 8KB.There should be no frequency greater than 0.032MHz in real time clocks' output.Mounting type Through Hole matches the RTC module.A total of 28 pins are attached to this real time clock.Maintaining the supply voltage at 5V is the key to high efficiency.
DS1643-85+ Features
28-DIP Module (0.600, 15.24mm) package
34 terminations
34 pin count
Be maintained at 5V for high efficiency.

DS1643-85+ Applications
There are a lot of Maxim Integrated
DS1643-85+ Real Time Clocks applications.

Copy machines
Mobile equipment
Battery powered devices
Printers and copiers
Electronic metering
Digital cameras
White goods
Elapsed time counter
Network powered devices
Battery backed up systems

Mount	Through Hole
Mounting Type	Through Hole
Package / Case	28-DIP Module (0.600, 15.24mm)
Number of Pins	28
Operating Temperature	0°C~70°C
Packaging	Tube
Published	2010
JESD-609 Code	e3
Feature	Leap Year, NVSRAM
Pbfree Code	yes
Part Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Number of Terminations	34
ECCN Code	EAR99
Type	Clock/Calendar
Terminal Finish	MATTE TIN
HTS Code	8473.30.11.80
Voltage - Supply	4.5V~5.5V
Terminal Position	DUAL
Supply Voltage	5V
Base Part Number	DS1643
Pin Count	34
JESD-30 Code	R-XDMA-U34
Operating Supply Voltage	5V
Interface	Parallel
Memory Size	8KB
Clock Frequency	0.032MHz
Logic Function	Clock
External Data Bus Width	8
Time Format	HH:MM:SS (24 hr)
Date Format	YY-MM-DD-dd
Current - Timekeeping (Max)	3mA @ 5V
Radiation Hardening	No
RoHS Status	ROHS3 Compliant