DS1500 Datasheet PDF - Dallas Semiconducotr
| Part Number | DS1500 | |
| Description | Y2K Watchdog RTC with Nonvolatile Control | |
| Manufacturers | Dallas Semiconducotr | |
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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.
APPLICATIONS
Remote Systems
Battery-Backed Systems
Telecom Switches
Office Equipment
Consumer Electronics
ORDERING INFORMATION
PART
TEMP RANGE PIN-PACKAGE
DS1500YEN -40°C to +85°C 32 TSOP
DS1500WEN -40°C to +85°C 32 TSOP
Selector Guide appears at end of data sheet.
Typical Operating Circuit appears at end of data sheet.
DS1500
Y2K Watchdog RTC with
Nonvolatile Control
FEATURES
§ 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
PIN CONFIGURATION
TOP VIEW
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.
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REV: 030603
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DS1500 Y2KC Watchdog RTC with Nonvolatile Control
Figure 2. Write Cycle Timing, Write-Enable-Controlled
A0-A4
CS
WE
DQ0-DQ7
tWC
VALID
tAS
VALID
tAH
tAS tWEW tWR
DATA OUTPUT
tWEZ
tDS tDH
DATA INPUT
DATA INPUT
Figure 3. Write Cycle Timing, Chip-Select-Controlled
tWC
A0-A4
CS
WE
DQ0-DQ7
VALID
tAS tCSW
tAH
tAS tWR
tD S
DATA INPUT
tDH
VALID
DATA INPUT
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for DS1500 electronic component. |
| Information | Total 19 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ DS1500.PDF Datasheet ] | |
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Featured Datasheets
| Part Number | Description | MFRS |
| DS1500 | The function is Y2K Watchdog RTC with Nonvolatile Control. Dallas Semiconducotr | |
| DS1500-3 | The function is AC-DC / Distributed Power Front-End 2U. Emerson |  |
| DS1501 | The function is (DS1501 / DS1511) Y2K-Compliant Watchdog Real-Time Clocks. Dallas Semiconducotr | |
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