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DS1500WEN Datasheet

  • DS1500WEN

  • Y2K Watchdog RTC with Nonvolatile Control

  • 19頁

  • DALLAS   DALLAS

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DS1500
Y2K Watchdog RTC with
Nonvolatile Control
www.maxim-ic.com
GENERAL 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.
FEATURES
摟
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 鹵1 Minute/Month at +25擄C
Day-of-Week/Date Alarm Register
Battery Voltage-Level Indicator Flags
Industrial Temperature Range: -40擄C to +85擄C
摟
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APPLICATIONS
Remote Systems
Battery-Backed Systems
Telecom Switches
Office Equipment
Consumer Electronics
ORDERING INFORMATION
PART
DS1500YEN
DS1500WEN
TEMP RANGE
-40擄C to +85擄C
-40擄C to +85擄C
PIN-PACKAGE
32 TSOP
32 TSOP
PIN CONFIGURATION
TOP VIEW
Selector Guide appears at end of data sheet.
Typical Operating Circuit appears at end of data sheet.
Dallas
Semiconductor
DS1500
TSOP
Note:
Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, click here:
www.maxim-ic.com/errata.
1 of 19
REV: 030603

DS1500WEN 產(chǎn)品屬性

  • 156

  • 集成電路 (IC)

  • 時鐘/計時 - 實時時鐘

  • -

  • 時鐘/日歷

  • 警報器，閏年，NVSRAM，方波輸出，監(jiān)視計時器，Y2K

  • 256B

  • HH:MM:SS（24 小時）

  • YY-MM-DD-dd

  • 并聯(lián)

  • 3 V ~ 3.6 V

  • 2.5 V ~ 3.7 V

  • -40°C ~ 85°C

  • 表面貼裝

  • 32-LFSOP（0.724"，18.40mm 寬）

  • 32-TSOP

  • 托盤

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