Product Details
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DESCRIPTION The DS1251 4096K NV SRAM with Phantom Clock is a fully static nonvolatile RAM (organized as 512K words by 8 bits) with a built-in real-time clock. The DS1251Y has a self-contained lithium energy source and control circuitry, which constantly monitors VCC for an out-of-tolerance condition. When such a condition occurs, the lithium energy source is automatically switched on and write protection is unconditionally enabled to prevent garbled data in both the memory and real-time clock. FEATURES ■ Real-Time Clock Keeps Track of Hundredths Of Seconds, Minutes, Hours, Days, Date of the Month, Months, and Years ■ 512K x 8 NV SRAM Directly Replaces Volatile Static RAM or EEPROM ■ Embedded Lithium Energy Cell Maintains Calendar Operation and Retains RAM Data ■ Watch Function is Transparent to RAM Operation ■ Automatic Leap Year Compensation Valid Up to 2100 ■ Over 10 Years of Data Retention in the Absence of Power ■ Full 10% Operating Range ■ Lithium Energy Source is Electrically Disconnected to Retain Freshness Until Power is Applied for the First Time ■ DIP Module Only – Standard 32-Pin JEDEC Pinout – Upward Compatible with the DS1248 ■ PowerCap Module Board Only ? Surface Mountable Package for Direct Connection to PowerCap Containing Battery and Crystal ? Replaceable Battery (PowerCap) ? Pin-for-Pin Compatible with Other Densities of DS124xP Phantom Clocks |
Product Description
| TYPE | DESCRIPTION |
| ANSC PART# | ANSC - DS12R887-33 |
| Category | Integrated Circuits (ICs) |
| Clock/Timing | |
| Real Time Clocks | |
| Manufacturer | Original |
| Series | - |
| Packaging | Tray |
| Part Status | Obsolete |
| DigiKey Programmable | Not Verified |
| Type | Clock/Calendar |
| Features | Alarm, Leap Year, NVSRAM, Square Wave Output, Trickle-Charger |
| Memory Size | 114B |
| Time Format | HH:MM:SS (12/24 hr) |
| Date Format | YY-MM-DD-dd |
| Interface | Parallel |
| Voltage - Supply | 2.97V ~ 3.63V |
| Voltage - Supply, Battery | 2V ~ 3.05V |
| Current - Timekeeping (Max) | 2mA @ 2.97V ~ 3.63V |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Surface Mount |
| Package / Case | 48-BBGA |
| Supplier Device Package | 48-PBGA (11.8x15.3) |
| Base Product Number | DS12R887 |
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