OBSOLETE PRODUCT NO RECOMMENDED REPLACEMENT DATASHEET contact our Technical Support Center at 1-888-INTERSIL or www.intersil.com/tsc ISL12027, ISL12027A FN8232 Rev 9.00 Real Time Clock/Calendar with EEPROM September 23, 2015 The ISL12027 device is a low power real time clock with Features timing and crystal compensation, clock/calender, power-fail Real Time Clock/Calendar indicator, two periodic or polled alarms, intelligent battery - Tracks Time in Hours, Minutes and Seconds backup switching, CPU Supervisor and integrated 512x8-bit - Day of the Week, Day, Month and Year EEPROM, in 16 Byte per page format. Two Non-Volatile Alarms The oscillator uses an external, low-cost 32.768kHz crystal. - Settable on the Second, Minute, Hour, Day of the Week, The real time clock tracks time with separate registers for Day, or Month hours, minutes, and seconds. The device has calendar - Repeat Mode (Periodic Interrupts) registers for date, month, year and day of the week. The calendar is accurate through 2099, with automatic leap year Automatic Backup to Battery or SuperCap correction. On-Chip Oscillator Compensation The ISL12027 and ISL12027A Power Control Settings are - Internal Feedback Resistor and Compensation different. The ISL12027 uses the Legacy Mode Setting, and Capacitors the ISL12027A uses the Standard Mode Setting. - 64 Position Digitally Controlled Trim Capacitor Applications that have V > V will require only the BAT DD - 6 Digital Frequency Adjustment Settings to 30ppm ISL12027A. Please refer toPower Control Operation on 2 512x8-Bits of EEPROM page 15 for more details. Also, please refer to I C - 16-Byte Page Write Mode (32 total pages) Communications During Battery Backup and LVR Operation - 8 Modes of BlockLock Protection on page 24 for important details. - Single Byte Write Capability Pinouts High Reliability ISL12027, ISL12027A (8 LD TSSOP) - Data Retention: 50 years TOP VIEW - Endurance: >2,000,000 Cycles Per Byte V 2 BAT SCL I C-bus Interface 1 8 V SDA DD 2 - 400kHz Data Transfer Rate 7 GND X1 3 6 800nA Battery Supply Current X2 RESET 4 5 Package Options - 8 Ld SOIC and 8 Ld TSSOP Packages ISL12027, ISL12027A Pb-Free (RoHS Compliant) (8 LD SOIC) TOP VIEW Applications V X1 DD Utility Meters 1 8 X2 V BAT 2 HVAC Equipment 7 RESET SCL Audio/Video Components 3 6 GND SDA Modems 4 5 Network Routers, Hubs, Switches, Bridges Cellular Infrastructure Equipment Fixed Broadband Wireless Equipment Pagers/PDA POS Equipment Test Meters/Fixtures Office Automation (Copiers, Fax) Home Appliances Computer Products Other Industrial/Medical/Automotive FN8232 Rev 9.00 Page 1 of 29 September 23, 2015ISL12027, ISL12027A Pin Descriptions PIN NUMBER SOIC TSSOP SYMBOL BRIEF DESCRIPTION 1 3 X1 The X1 pin is the input of an inverting amplifier and is intended to be connected to one pin of an external 32.768kHz quartz crystal. X1 can also be driven directly from a 32.768kHz source. 2 4 X2 The X2 pin is the output of an inverting amplifier and is intended to be connected to one pin of an external 32.768kHz quartz crystal. 3 5 RESET RESET. This is a reset signal output. This signal notifies a host processor that the watchdog time period has expired or that the voltage has dropped below a fixed V threshold. It is an open drain active LOW TRIP output. Recommended value for the pull-up resistor is 5k . If unused, connect to ground. 4 6 GND Ground. 5 7 SDA Serial Data (SDA) is a bidirectional pin used to transfer serial data into and out of the device. It has an open drain output and may be wire ORed with other open drain or open collector outputs. 6 8 SCL The Serial Clock (SCL) input is used to clock all serial data into and out of the device. The input buffer on this pin is always active (not gated). 71 V This input provides a backup supply voltage to the device. V supplies power to the device in the event BAT BAT that the V supply fails. This pin should be tied to ground if not used. DD 82 V Power Supply. DD Ordering Information PART V RESET NUMBER PART V TRIP POINT BSW BIT DEFAULT VOLTAGE TEMP. RANGE PACKAGE PKG. BAT (Notes 1, 2, 3) MARKING (V) SETTING (V) (C) (Pb-Free) DWG. ISL12027IB27Z 12027 IB27Z V < V BSW = 1 2.63 -40 to +85 8 Ld SOIC M8.15 DD BAT ISL12027IB27AZ 12027 IB27AZ V < V BSW = 1 2.92 -40 to +85 8 Ld SOIC M8.15 DD BAT ISL12027IB30AZ 12027 IB30AZ V < V BSW = 1 3.09 -40 to +85 8 Ld SOIC M8.15 DD BAT ISL12027IBZ 12027 IBZ V < V BSW = 1 4.38 -40 to +85 8 Ld SOIC M8.15 DD BAT ISL12027IBAZ 12027 IBAZ V < V BSW = 1 4.64 -40 to +85 8 Ld SOIC M8.15 DD BAT ISL12027IV27Z 2027 I27Z V < V BSW = 1 2.63 -40 to +85 8 Ld TSSOP M8.173 DD BAT ISL12027IV27AZ 2027 27AZ V < V BSW = 1 2.92 -40 to +85 8 Ld TSSOP M8.173 DD BAT ISL12027IV30AZ 2027 30AZ V < V BSW = 1 3.09 -40 to +85 8 Ld TSSOP M8.173 DD BAT ISL12027IVZ (No 2027 IVZ V < V BSW = 1 4.38 -40 to +85 8 Ld TSSOP M8.173 DD BAT longer available or supported) ISL12027IVAZ (No 2027 IVAZ V < V BSW = 1 4.64 -40 to +85 8 Ld TSSOP M8.173 DD BAT longer available or supported) ISL12027AIB27Z 12027A IB27Z V < V BSW = 0 2.63 -40 to +85 8 Ld SOIC M8.15 DD BAT (No longer available or supported) ISL12027AIV27Z 2027A I27Z V < V BSW =0 2.63 -40 to +85 8 Ld TSSOP M8.173 DD BAT (No longer available or supported) NOTES: 1. Add -T suffix for tape and reel. Please refer to TB347 for details on reel specifications. 2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD- 020. 3. For Moisture Sensitivity Level (MSL), please see device information page for ISL12027, ISL12027A. For more information on MSL please see techbrief TB363. FN8232 Rev 9.00 Page 2 of 29 September 23, 2015