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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.

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

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

Evaluation Kits

none

Design Guides

REAL-TIME CLOCKS (PDF)

Reliability Reports

Request Reliability Report for: DS1603

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	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS1603			MOD;14 pin;255 mm² Use pkgcode/variation: MDP14-1*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
DS1603+			MOD;14 pin;255 mm² Use pkgcode/variation: MDP14+1*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis

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