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DS9034PCX Datasheet(PDF) 1 Page - Dallas Semiconductor |
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DS9034PCX Datasheet(HTML) 1 Page - Dallas Semiconductor |
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1 / 11 page  1 of 11 022101 FEATURES Integrates NV SRAM, real time clock, crystal, power-fail control circuit and lithium energy source Clock registers are accessed identically to the static RAM. These registers are resident in the eight top RAM locations Totally nonvolatile with over 10 years of operation in the absence of power BCD coded year, month, date, day, hours, minutes, and seconds with leap year compensation valid up to 2100 Power-fail write protection allows for ±10% VCC power supply tolerance DS1646 only (DIP Module) − Standard JEDEC bytewide 128k x 8 RAM pinout DS1646P only (PowerCap ® Module Board) − Surface mountable package for direct connection to PowerCap containing battery and crystal − Replaceable battery (PowerCap) − Power-fail output − Pin-for-pin compatible with other densities of DS164XP Timekeeping RAM ORDERING INFORMATION DS1646 32-pin DIP module *DS1646P 34-pin PowerCap Module Board *DS9034PCX Power Cap (Required; must be ordered separately) PIN ASSIGNMENT DS1646/DS1646P Nonvolatile Timekeeping RAM www.dalsemi.com 1 NC 2 3 A15 A16 PFO 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 X1 GND VBAT X2 34-Pin PowerCap Module Board (Uses DS9034PCX PowerCap) 13 1 2 3 4 5 6 7 8 9 10 11 12 14 31 32-Pin Encapsulated Package 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 |
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