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Status
Part Number	Status
DS1500	Active: In Production. But some versions of the family are No Longer Available. See Ordering Information.

Data Sheet

FULL DATA SHEET (PDF, 268kB) Download   E-Mail

Errata

Errata DS1500 1500A2.pdf

Description

The DS1500 is a full-function, year 2000-compliant, real-time clock/calendar (RTC) with an alarm, watchdog timer, power-on reset, battery monitors, 256 bytes of on-board nonvolatile (NV) SRAM, NV control for backing up an external SRAM, and a 32.768kHz output. User access to all registers within the DS1500 is accomplished with a byte-wide interface as shown in Figure 7. The RTC registers contain century, year, month, date, day, hours, minutes, and seconds data in 24-hour binary-coded decimal (BCD) format. Corrections for day of month and leap year are made automatically.

Key Features		Applications/Uses
BCD-Coded Century, Year, Month, Date, Day, Hours, Minutes, and Seconds with Automatic Leap-Year Compensation Valid Up to the Year 2100 Programmable Watchdog Timer and RTC Alarm Century Register; Y2K-Compliant RTC Automatic Battery Backup and Write Protection to External SRAM +5V Operation Precision Power-On Reset Power-Control Circuitry Supports System Power-On from Date/Day/Time Alarm or Key Closure 256 Bytes User NV RAM Auxiliary Battery Input Accuracy Better than ±1 Minute/Month at +25°C Day-of-Week/Date Alarm Register Battery Voltage-Level Indicator Flags Industrial Temperature Range: -40°C to +85°C Underwriters Laboratories (UL®) Recognized		Battery-Backed Systems Consumer Electronics Office Equipment Remote Systems Telecom Switches

Diagram

Typical Operating Circuit

Application Notes

Application Note 58: Crystal Considerations with Dallas Real-Time Clocks (RTCs) - DS1500 Application Note 66: Watchdog Timekeeper - DS1500 Application Note 504: Design Considerations for Dallas Semiconductor Real-Time Clocks - DS1500 Application Note 505: Lithium Coin-Cell Batteries: Predicting an Application Lifetime - DS1500 Application Note 701: Using the DS32kHz with Dallas Real-Time Clocks - DS1500 Application Note 3816: Selecting a Backup Source for Real-Time Clocks - DS1500

Design Guides

Real-Time Clocks (PDF)

Reliability Reports

Reliability Report: DS1500.pdf 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: 1-5 of 5

DS1500	Free Sample	Buy	Status	Recommended Replacement	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS1500WE		N/A	No Longer Available	DS1500WE+	TSOP;32 pin;168.1 mm² Outline Drawing: 21-0274 (PDF) Land Pattern: 90-0320 (PDF) Use pkgcode/variation: Z32-4*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
DS1500WE+			Active		TSOP;32 pin;168.1 mm² Outline Drawing: 21-0274 (PDF) Land Pattern: 90-0320 (PDF) Use pkgcode/variation: Z32+4*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1500YE+			Active		TSOP;32 pin;168.1 mm² Outline Drawing: 21-0274 (PDF) Land Pattern: 90-0320 (PDF) Use pkgcode/variation: Z32+4*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1500WEN+			Active		TSOP;32 pin;168.1 mm² Outline Drawing: 21-0274 (PDF) Land Pattern: 90-0320 (PDF) Use pkgcode/variation: Z32+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1500YEN+			Active		TSOP;32 pin;168.1 mm² Outline Drawing: 21-0274 (PDF) Land Pattern: 90-0320 (PDF) Use pkgcode/variation: Z32+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

More Information

Other Watchdog Clocks RTC Calculator

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Technical Documents

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Description   Key Features   Applications/Uses   Key Specifications   Diagram

Data Sheet   Errata   Application Notes   Design Guides   Engineering Journals   Reliability Reports   Software/Models   Evaluation Kits

Price and Availability   Samples   Buy Online   Package Information   Lead-Free Information

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