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Status
Part Number	Status	Replacement	Explanation
DS1603	This product is No Longer Available. See Ordering Information for recommended replacements.	DS1682	There is no direct replacement. The DS1682 has an event counter and elapsed time counter.

Data Sheet

FULL DATA SHEET (PDF, 232kB) Download   E-Mail

Description

The DS1603 Elapsed Time Counter provides multiple-purpose, low-cost, nonvolatile timekeeping with two 32-bit counters. One counter constantly maintains real time by counting seconds, whether powered from system or from backup supplies. The other counts only when system power is active, which is useful for monitoring operational on-time for warranty or billing purposes related to equipment use. Under software control, this counter can also count signals to track external real-time events. Both counters output binary data that can be read in standard clock and calendar format using a software algorithm. Read/write communication is transmitted over a 3-wire serial port. The DS1603 module incorporates a 32.768kHz crystal and backup battery. Installed in a processor-controlled system, the DS1603 combines timekeeping and counting functions at extremely low cost with minimal current consumption.

This product contains lithium-metal batteries. See applicable regulations for transport requirements for batteries in equipment.

Key Features

Two 32-bit counters track time in seconds for >125 years One counter tracks real time on system or battery power while battery input >2.5V One counter tracks elapsed time under system power and holds the count under battery power Clear function resets a selected counter to zero Read/write serial port affords low pin count Maximum current drain <1µA with serial port disabled 1-byte protocol defines read/write, counter address and software clear function Operating temperature range: 0°C to 70°C Underwriters Laboratories (UL®) Recognized

Application Notes

Application Note 30: Recording Power Cycling Information Using the DS1602/DS1603 - DS1603 Application Note 504: Design Considerations for Dallas Semiconductor Real-Time Clocks - DS1603 Application Note 517: DS1371/DS1372/DS1374 32-Bit Binary Counter Time Conversion - DS1603

Design Guides

Real-Time Clocks (PDF)

Reliability Reports

Request Reliability Report for: DS1603 Underwriters Laboratories (UL®) Recognized

Software/Models

none

Ordering Information

Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-2 of 2

DS1603	Free Sample	Buy	Status	Recommended Replacement	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS1603		N/A	No Longer Available	DS1682 There is no direct replacement. The DS1682 has an event counter and elapsed time counter.	EDIP;14 pin;211 mm² Outline Drawing: 21-0244 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDP14-1*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
DS1603+		N/A	No Longer Available	DS1682	EDIP;14 pin;211 mm² Outline Drawing: 21-0244 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDP14+1*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis

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