19-6075 Rev 11/11 DS1216 SmartWatch RAM (DS1216B/C/D/H) SmartWatch ROM (DS1216E/F) GENERAL DESCRIPTION FEATURES The DS1216 SmartWatch RAM and SmartWatch Keeps Track of Hundredths of Seconds, ROM sockets are 600-mil-wide DIP sockets with a Seconds, Minutes, Hours, Days, Date of the built-in CMOS watch function, an NV RAM Month, Months, and Years controller circuit, and an embedded lithium energy Converts Standard 2K x 8 Up to 512K x 8 source. The sockets provide an NV RAM solution CMOS Static RAMs into Nonvolatile Memory for memory sized from 2K x 8 to 512K x 8 with Embedded Lithium Energy Cell Maintains package sizes from 26 pins to 32 pins. When a Watch Information and Retains RAM Data socket is mated with a CMOS SRAM, it provides a Watch Function is Transparent to RAM complete solution to problems associated with Operation memory volatility and uses a common energy source to maintain time and date. The SmartWatch Automatic Leap Year Compensation Valid Up ROM sockets use the embedded lithium source to to 2100 maintain the time and date only. A key feature of Lithium Energy Source is Electrically the SmartWatch is that the watch function remains Disconnected to Retain Freshness Until Power transparent to the RAM. The SmartWatch monitors is Applied for the First Time for an out-of-tolerance condition. When such a V CC Proven Gas-Tight Socket Contacts condition occurs, an internal lithium energy source is automatically switched on and write protection Full 10% Operating Range is unconditionally enabled to prevent loss of watch Accuracy Better Than 1 Minute/Month and RAM data. at +25 C TYPICAL OPERATING CIRCUIT ORDERING INFORMATION PART TEMP RANGE PIN-PACKAGE DS1216B 0C to +70C 28 SmartWatch Socket DS1216C 0C to +70C 28 SmartWatch Socket DS1216D 0C to +70C 32 SmartWatch Socket DS1216E 0C to +70C 28 SmartWatch Socket DS1216F 0C to +70C 32 SmartWatch Socket DS1216H 0C to +70C 32 SmartWatch Socket (See Figure 2 for letter suffix marking identification.) Selector Guide appears on page 2. 1 of 15 DS1216 SmartWatch RAM/SmartWatch ROM PIN DESCRIPTION RST - Reset, Active Low OE - Output Enable, Active Low DQ0 - Data Input/Output 0 (RAM) WE - Write Enable, Active Low A2 - Address Bit 2 (Read/Write ROM ) V - Switched V for 28-/32-Pin RAM CC CC A0 - Address Bit 0 (Data Input ROM ) V B - Switched V for 24-Pin RAM CC CC GND - Ground V D - Switched V for 28-Pin RAM CC CC CE - Conditioned Chip Enable, Active Low PIN CONFIGURATIONS TOP VIEW 1 RST 32 V RST 1 28 V CC CC 2 31 2 27 WE 3 30 V D CC 3 26 V B CC 4 29 WE 4 25 5 28 5 24 6 27 6 23 7 26 7 22 OE 8 25 A2 8 21 24 9 OE 9 20 CE A2 10 23 11 A0 10 19 22 CE A0 12 21 DQ0 11 18 13 20 DQ0 12 17 14 19 13 16 15 18 GND 14 15 GND 16 17 DS1216B/C/E DS1216D/F/H 28-Pin Intelligent Socket 32-Pin Intelligent Socket SELECTOR GUIDE PC BOARD MODIFICATION PART RAM/ROM RAM DENSITY REQUIRED FOR DENSITY UPGRADE DS1216B RAM 16K/64K No/Yes DS1216C RAM 64K/256K No DS1216D RAM 256K/1M No/Yes DS1216E ROM 64K/256K No DS1216F ROM 64K/256K/1M No DS1216H RAM 1M/4M No 2 of 15