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DS1245W Datasheet(PDF) 1 Page - Dallas Semiconductor |
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DS1245W Datasheet(HTML) 1 Page - Dallas Semiconductor |
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1 / 11 page  1 of 11 111899 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 as fast as 150 ns 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 New 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 PIN DESCRIPTION A0 - A16 - Address Inputs DQ0 - DQ7 - Data In/Data Out CE - Chip Enable WE - Write Enable OE - Output Enable VCC - Power (+3.3V) GND - Ground NC - No Connect DS1245W 3.3V 1024k Nonvolatile SRAM www.dalsemi.com 13 1 2 3 4 5 6 7 8 9 10 11 12 14 31 32-PIN ENCAPSULATED PACKAGE 740-MIL EXTENDED A14 A7 A5 A4 A3 A2 A1 A0 DQ1 DQ0 VCC A15 NC WE A13 A8 A9 A11 OE A10 CE DQ7 DQ5 DQ6 32 30 29 28 27 26 25 24 23 22 21 19 20 A16 A12 A6 NC DQ2 GND 15 16 18 17 DQ4 DQ3 1 NC 2 3 A15 A16 NC VCC WE OE CE DQ7 DQ6 DQ5 DQ4 DQ3 DQ2 DQ1 DQ0 GND 4 5 6 7 8 9 10 11 12 13 14 15 16 17 NC A14 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 A13 A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 34 NC GND VBAT 34-PIN POWERCAP MODULE (PCM) (USES DS9034PC POWERCAP) |
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Similar Description - DS1245W |
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