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DS1486 Datasheet(PDF) 1 Page - Dallas Semiconductor |
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DS1486 Datasheet(HTML) 1 Page - Dallas Semiconductor |
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1 / 17 page  1 of 17 072401 FEATURES § 128 kbytes of user NV RAM § Integrated NV SRAM, real-time clock, crystal, power-fail control circuit and lithium energy source § Totally nonvolatile with over 10 years of operation in the absence of power § Watchdog timer restarts an out-of-control processor § Alarm function schedules real-time related activities such as system wakeup § Programmable interrupts and square wave output § All registers are individually addressable via the address and data bus § Interrupt signals active in power-down mode ORDERING INFORMATION DS1486 XXX (32–pin DIP module) –150 150 ns access –120 120 ns access *DS1486P XXX 34-pin PowerCap Module Board –150 150 ns access –120 120 ns access *DS9034PCX PowerCap Required (must be ordered separately) PIN DESCRIPTION INTB – Interrupt Output A (open drain) INTB (INTB) – Interrupt Output B (open drain) A0–A16 – Address Inputs DQ0–DQ7 – Data Input/Output CE – Chip Enable OE – Output Enable WE – Write Enable VCC – +5 Volts GND – Ground SQW – Square Wave Output NC – No Connection X1, X2 – Crystal Connection VBAT – Battery Connection PIN ASSIGNMENT DS1486/DS1486P RAMified Watchdog Timekeeper www.maxim-ic.com 34 1 INTB (INTB) 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 SQW 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 INTA X1 GND VBAT X2 34-Pin PowerCap Module Board (Uses DS9034PCX PowerCap) INTB (INTB) 13 1 2 3 4 5 6 7 8 9 10 11 12 14 31 DS1486 128k x 8 32-Pin Encapsulated Package A14 A7 A5 A4 A3 A2 A1 A0 DQ1 DQ0 VCC A15 INTA/SQW 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 DQ2 GND 15 16 18 17 DQ4 DQ3 |
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