DS12R885/DS12CR887/ DS12R887 RTCs with Constant-Voltage Trickle Charger General Description Features The DS12R885 is a functional drop-in replacement for Trickle-Charge Capability for a Rechargeable the DS12885 real-time clock (RTC). The device pro- Battery or Super Cap vides an RTC/calendar, one time-of-day alarm, three Selectable Intel or Motorola Bus Timing maskable interrupts with a common interrupt output, a RTC Counts Seconds, Minutes, Hours, Day, Date, programmable square wave, and 114 bytes of battery- Month, and Year with Leap-Year Compensation to backed static RAM. The date at the end of the month is 2100 automatically adjusted for months with fewer than 31 Interrupt Output with Three Independently days, including correction for leap years. It also oper- ates in either 24-hour or 12-hour format with an AM/PM Maskable Interrupt Flags indicator. A precision temperature-compensated circuit Time-of-Day Alarm is Once-per-Second to Once- monitors the status of V . If a primary power failure is CC per-Day detected, the device automatically switches to a back- Periodic Rates from 122s to 500ms up supply. The V pin supports a rechargeable BACKUP End-of-Clock Update Cycle Flag battery or a super cap and includes an integrated, 14 Bytes of Clock and Control Registers always enabled trickle charger. The DS12R885 is 114 Bytes of General-Purpose Battery-Backed NV accessed through a multiplexed byte-wide interface, which supports both Intel and Motorola modes. The RAM with Clear Input DS12CR887 and DS12R887 integrate the DS12R885 Programmable Square-Wave Output die with a crystal and battery. Automatic Power-Fail Detect and Switch Circuitry Applications +5.0V or +3.3V Operation Industrial Temperature Range Embedded Systems DS12CR887 Encapsulated DIP (EDIP) Module with Utility Meters Integrated Battery and Crystal Security Systems DS12R887 BGA Module Surface-Mountable Package with Integrated Crystal and Network Hubs, Bridges, and Routers Rechargeable Battery Typical Operating Circuit Ordering Information PIN- PART TEMP RANGE TOP MARK* CRYSTAL PACKAGE V CC 24 SO DS12R885S-5+ -40C to +85C DS12R885-5 (300 mils) X1 X2 V CC AS RESET DS12R885S-5+ 24 SO -40C to +85C DS12R885-5 T&R (300 mils) RCLR R/W 24 SO DS DS12R885S-33+ -40C to +85C DS12R885-33 DS83C520 DS12R885 (300 mils) CS DS12R885S-33+ 24 SO -40C to +85C DS12R885-33 AD(07) SQW T&R (300 mils) IRQ V BACKUP 24 EDIP DS12CR887-5+ -40C to +85C DS12CR887-5 SUPER (700 mils) MOT CAP GND 24 EDIP DS12CR887-33+ -40C to +85C DS12CR887-33 (700 mils) DS12R887-5 -20C to +60C 48 BGA DS12R887-5 DS12R887-33 -20C to +60C 48 BGA DS12R887-33 +Denotes a lead(Pb)-free/RoHS-compliant package. Pin Configurations appear at end of data sheet. T&R = Tape and reel. *A + anywhere on the top mark indicates a lead(Pb)-free device. For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maximintegrated.com. 19-5217 Rev 8 1/15DS12R885/DS12CR887/DS12R887 RTCs with Constant-Voltage Trickle Charger ABSOLUTE MAXIMUM RATINGS Voltage Range on V Pin Relative to Ground .....-0.3V to +6.0V Lead Temperature (soldering, 10s) .................................+260C CC Operating Temperature Range ...........................-40C to +85C (Note: EDIP is hand or wave-soldered only.) Operating Temperature Range Soldering Temperature (reflow) (DS12R887-33 and DS12R887-5) ....................-20C to +60C SO .................................................................................+260C Operating Temperature Range (All others) .........-20C to +60C BGA...............................................................................+225C Storage Temperature Range EDIP..................................................................-40C to +85C SO...................................................................-55C to +125C BGA ..................................................................-20C to +60C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. DC ELECTRICAL CHARACTERISTICS (V = V to V , T = -40C to +85C, (DS12R887-33 and DS12R887-5, T = -20C to +60C), unless otherwise noted.) CC CC(MIN) CC(MAX) A A (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS -33 2.97 3.3 3.63 Supply Voltage (Note 2) V V CC -5 4.5 5.0 5.5 V Input Voltage BACKUP V (Note 2) 2.0 V V BACKUP OUT (DS12R885 Only) V + CC Input Logic 1 V (Note 2) 2.2 V IH 0.3 Input Logic 0 V (Note 2) -0.3 +0.8 V IL -33 0.72 V Power-Supply Current CC I mA CC1 (Note 3) -5 0.8 2 -5 0.2500.5 V Standby Current (Note 4) I mA CC CCS -33 0.1400.3 Input Leakage I -1.0 +1.0 A IL I/O Leakage I (Note 5) -1.0 +1.0 A OL Input Current I (Note 6) -1.0 +500 A MOT Output Current at 2.4V I (Note 2) -1.0 mA OH Output Current at 0.4V I (Note 2) 4.0 mA OL -33 2.7 2.882.97 Power-Fail Voltage (Note 2) V V PF -5 4.054.334.5 -33 VRT Trip Point VRT 1.3 V TRIP -5 Trickle-Charger Current-Limiting R1 DS12R885 Only 10 k Resistor Trickle-Charger Output Voltage V DS12R885 Only 3.05 V OUT 2 Maxim Integrated