(Hong Kong)
Product Summary
The DS1747-120 is a full-function, year-2000-compliant (Y2KC), real-time clock/calendar (RTC) and 512k x 8 nonvolatile static RAM. User access to all registers within the DS1747-120 is accomplished with a byte-wide interface. The RTC information and control bits reside in the eight uppermost RAM locations. The RTC registers contain century, year, month, date, day, hours, minutes, and seconds data in 24-hour binary-coded decimal (BCD) format. Corrections for the date of each month and leap year are made automatically. TheDS1747-120 also contains its own power-fail circuitry that deselects the device when the VCC supply is in an out-of-tolerance condition. This feature prevents loss of data from unpredictable system operation brought on by low VCC as errant access and update cycles are avoided.
Parametrics
DS1747-120 absolute maximum ratings: (1)Voltage Range on Any Pin Relative to Ground: -0.3V to +6.0V; (2)Operating Temperature Range: 0 to +70℃; (3)Storage Temperature Range: -40 to +85℃; (4)Lead Temperature (soldering, 10s): +260℃; (5)Soldering Temperature (reflow, PowerCap): +260℃.
Features
DS1747-120 features: (1)Integrated NV SRAM, Real-Time Clock (RTC), Crystal, Power-Fail Control Circuit, and Lithium Energy Source; (2)Clock Registers are Accessed Identically to the Static RAM. These Registers are Resident in the Eight Top RAM Locations; (3)Century Byte Register (Y2K Compliant); (4)Totally Nonvolatile with Over 10 Years of Operation in the Absence of Power; (5)BCD-Coded Century, Year, Month, Date, Day, Hours, Minutes, and Seconds with Automatic Leap Year Compensation Valid Up to the Year 2100; (6)Battery Voltage-Level Indicator Flag; (7)Power-Fail Write Protection Allows for ±10% VCC Power-Supply Tolerance; (8)Lithium Energy Source is Electrically Disconnected to Retain Freshness Until Power is Applied for the First Time.
Diagrams
 |
 DS17 |
Other |
|
Data Sheet |
Negotiable |
|
||||||
|
DS1701K |
|
KIT ONE-WIRE THERMAL MGMT |
Data Sheet |
Negotiable |
|
||||||
|
DS1702K |
|
KIT TWO-WIRE THERMAL MGMT |
Data Sheet |
Negotiable |
|
||||||
|
DS1703K-KIT |
Maxim Integrated Products |
Temperature Sensor Development Tools |
Data Sheet |
Negotiable |
|
||||||
|
DS1705 |
Other |
|
Data Sheet |
Negotiable |
|
||||||
 |
DS1705EPA |
Maxim Integrated Products |
Supervisory Circuits 3.3/5V MicroMonitor |
Data Sheet |
|
|
||||||
