DS1501 Series
Y2K-Compliant Watchdog Real-Time Clocks
Manufacturer: Analog Devices Inc./Maxim Integrated
Catalog
Y2K-Compliant Watchdog Real-Time Clocks
| Part | Current - Timekeeping (Max) | Voltage - Supply [Max] | Voltage - Supply [Min] | Voltage - Supply, Battery [Max] | Voltage - Supply, Battery [Min] | Type | Memory Size | Mounting Type | Operating Temperature [Max] | Operating Temperature [Min] | Time Format | Date Format | Features | Interface | Supplier Device Package | Package / Case [custom] | Package / Case | Package / Case [custom] | Package / Case | Package / Case |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 Analog Devices Inc./Maxim Integrated | 5 mA | 5.5 V | 4.5 V | 3.7 V | 2.5 V | Clock/Calendar | 256 B | Surface Mount | 85 °C | -40 C | HH:MM:SS (24 hr) | YY-MM-DD-dd | Alarm Leap Year NVSRAM Square Wave Output Watchdog Timer Y2K | Parallel | 28-SOIC | 0.295 " | 28-SOIC | 7.5 mm | ||
Analog Devices Inc./Maxim Integrated | 4 mA | 3.6 V | 3 V | 3.7 V | 2.5 V | Clock/Calendar | 256 B | Surface Mount | 85 °C | -40 C | HH:MM:SS (24 hr) | YY-MM-DD-dd | Alarm Leap Year NVSRAM Square Wave Output Watchdog Timer Y2K | Parallel | 28-SOIC | 0.295 " | 28-SOIC | 7.5 mm | ||
 Analog Devices Inc./Maxim Integrated | 5 mA | 5.5 V | 4.5 V | 3.7 V | 2.5 V | Clock/Calendar | 256 B | Surface Mount | 70 °C | 0 °C | HH:MM:SS (24 hr) | YY-MM-DD-dd | Alarm Leap Year NVSRAM Square Wave Output Watchdog Timer Y2K | Parallel | 28-TSOP | 28-TSSOP (0.465" 11.80mm Width) | ||||
Analog Devices Inc./Maxim Integrated | 4 mA | 3.6 V | 3 V | 3.7 V | 2.5 V | Clock/Calendar | 256 B | Surface Mount | 85 °C | -40 C | HH:MM:SS (24 hr) | YY-MM-DD-dd | Alarm Leap Year NVSRAM Square Wave Output Watchdog Timer Y2K | Parallel | 28-SOIC | 0.295 " | 28-SOIC | 7.5 mm | ||
Analog Devices Inc./Maxim Integrated | 4 mA | 3.6 V | 3 V | 3.7 V | 2.5 V | Clock/Calendar | 256 B | Surface Mount | 70 °C | 0 °C | HH:MM:SS (24 hr) | YY-MM-DD-dd | Alarm Leap Year NVSRAM Square Wave Output Watchdog Timer Y2K | Parallel | 28-SOIC | 0.295 " | 28-SOIC | 7.5 mm | ||
Analog Devices Inc./Maxim Integrated | 5 mA | 5.5 V | 4.5 V | 3.7 V | 2.5 V | Clock/Calendar | 256 B | Surface Mount | 70 °C | 0 °C | HH:MM:SS (24 hr) | YY-MM-DD-dd | Alarm Leap Year NVSRAM Square Wave Output Watchdog Timer Y2K | Parallel | 28-SOIC | 0.295 " | 28-SOIC | 7.5 mm | ||
Analog Devices Inc./Maxim Integrated | 4 mA | 3.6 V | 3 V | 3.7 V | 2.5 V | Clock/Calendar | 256 B | Surface Mount | 70 °C | 0 °C | HH:MM:SS (24 hr) | YY-MM-DD-dd | Alarm Leap Year NVSRAM Square Wave Output Watchdog Timer Y2K | Parallel | 28-SOIC | 0.295 " | 28-SOIC | 7.5 mm | ||
Analog Devices Inc./Maxim Integrated | 5 mA | 5.5 V | 4.5 V | 3.7 V | 2.5 V | Clock/Calendar | 256 B | Surface Mount | 85 °C | -40 C | HH:MM:SS (24 hr) | YY-MM-DD-dd | Alarm Leap Year NVSRAM Square Wave Output Watchdog Timer Y2K | Parallel | 28-SOIC | 0.295 " | 28-SOIC | 7.5 mm | ||
Analog Devices Inc./Maxim Integrated | 4 mA | 3.6 V | 3 V | 3.7 V | 2.5 V | Clock/Calendar | 256 B | Surface Mount | 85 °C | -40 C | HH:MM:SS (24 hr) | YY-MM-DD-dd | Alarm Leap Year NVSRAM Square Wave Output Watchdog Timer Y2K | Parallel | 28-TSOP | 28-TSSOP (0.465" 11.80mm Width) | ||||
 Analog Devices Inc./Maxim Integrated | 5 mA | 5.5 V | 4.5 V | 3.7 V | 2.5 V | Clock/Calendar | 256 B | Through Hole | 85 °C | -40 C | HH:MM:SS (24 hr) | YY-MM-DD-dd | Alarm Leap Year NVSRAM Square Wave Output Watchdog Timer Y2K | Parallel | 28-PDIP | 28-DIP | 15.24 mm | 0.6 in |
Description
AI
The DS1501/DS1511 are full-function, year 2000-compliant real-time clock/calendars (RTCs) with an RTC alarm, watchdog timer, power-on reset, battery monitors, 256 bytes NV SRAM, and a 32.768kHz output. User access to all registers within the DS1501/DS1511 is accomplished with a byte-wide interface, as shown in Figure 8. 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.ApplicationsBattery-Backed SystemsConsumer ElectronicsOffice EquipmentRemote SystemsTelecom Switches