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DS1602

Elapsed Time Counter

Overview

Technical Documents

Ordering Info

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Status

Part Number	Status	Replacement	Explanation
DS1602	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.

Description

The DS1602 Elapsed Time Counter provides multiple-purpose, low-cost 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 DS1602 directly attaches to a 32.768kHz crystal and can be made nonvolatile with a backup battery. Installed in a processor-controlled system, the DS1602 combines timekeeping and counting functions at extremely low cost with minimal current consumption that prolongs operational lifetime.

Data Sheet

Download	Rev 1	(PDF, 224kB)
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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 0
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: -40°C to +85°C
Underwriters Laboratories (UL) Recognized

Application Notes

Application Note 58		Crystal Considerations with Maxim Real-Time Clocks (RTCs)
Application Note 517		DS1371/DS1372/DS1374 32-Bit Binary Counter Time Conversion
Application Note 701		Using the DS32kHz with Dallas Real-Time Clocks

Product Guides

Real-Time Clocks (PDF)

Reliability Reports

Reliability Report:	DS1602.pdf
Underwriters Laboratories (UL) Recognized

Software/Models

none

Ordering Information

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Tape and Reel

Sample

Part Number	Free Sample	Buy	Status	Recommended Replacement	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS1602		N/A	No Longer Available	DS1682S+ There is no direct replacement. The DS1682 has an event counter and elapsed time counter.	PDIP(N);8 pin;79.7 mm² Outline Drawing:21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P8-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS1602+		N/A	No Longer Available	DS1682	PDIP(N);8 pin;79.7 mm² Outline Drawing:21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P8+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1602S		N/A	No Longer Available	DS1682	SOIC;8 pin;44.1 mm² Outline Drawing:21-0262 (PDF) Land Pattern: 90-0258 (PDF) Use pkgcode/variation: W8-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS1602S+		N/A	No Longer Available	DS1682	SOIC;8 pin;44.1 mm² Land Pattern: Not Available Use pkgcode/variation: W8+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1602S+TRL		N/A	No Longer Available	DS1682	SOIC;8 pin;44.1 mm² Land Pattern: Not Available Use pkgcode/variation: W8+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1602S-TRL		N/A	No Longer Available	DS1682	SOIC;8 pin;44.1 mm² Land Pattern: Not Available Use pkgcode/variation: W8-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis

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; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product 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.

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Information Index

Overview		Technical Documents		Ordering Info		Related Products
Description Key Features Applications/Uses Key Specifications Diagram Notes and Comments		Data Sheet Application Notes Evaluation Kits Product Guides Reliability Reports Software/Models		Price and Availability Samples Buy Online Package Information Lead-Free Information		Similar Products by Function Similar Products by Application Evaluation Kits Products with Similar Part Numbers Products Used With This

Rev 1; 2002-10-02
This page last modified: 2007-06-18