DS1245W

19-5640; Rev 11/10 www.maxim-ic.com DS1245W 3.3V 1024k Nonvolatile SRAM FEATURES  10 years minimum data retention in the absence of external power  Data is automatically protected during power loss  Replaces 128k x 8 volatile static RAM, EEPROM or Flash memory  Unlimited write cycles  Low-power CMOS  Read and write access times of 100ns  Lithium energy source is electrically disconnected to retain freshness until power is applied for the first time  Optional industrial temperature range of -40°C to +85°C, designated IND  JEDEC standard 32-pin DIP package  PowerCap Module (PCM) package - Directly surface-mountable module - Replaceable snap-on PowerCap provides lithium backup battery - Standardized pinout for all nonvolatile SRAM products - Detachment feature on PowerCap allows easy removal using a regular screwdriver PIN ASSIGNMENT NC A16 A14 A12 A7 A6 A5 A4 A3 A2 A1 A0 DQ0 DQ1 DQ2 GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 VCC 31 A15 30 NC 29 WE 28 A13 27 A8 26 A9 25 A11 24 OE 23 A10 22 CE 21 DQ7 20 DQ6 19 DQ5 18 DQ4 17 DQ3 32-PIN Encapsulated Package 740-Mil Extended NC 1 A15 2 A16 3 NC 4 VCC 5 WE 6 OE 7 CE 8 DQ7 9 DQ6 10 DQ5 11 DQ4 12 DQ3 13 GND VBAT DQ2 14 DQ1 15 DQ0 16 GND 17 34 NC 33 NC 32 A14 31 A13 30 A12 29 A11 28 A10 27 A9 26 A8 25 A7 24 A6 23 A5 22 A4 21 A3 20 A2 19 A1 18 A0 34-Pin PowerCap Module (PCM) (Uses DS9034PC+ or DS9034PCI+ PowerCap) PIN DESCRIPTION A0 - A16 - Address Inputs DQ0 - DQ7 - Data In/Data Out ...