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DS1643P-85 Datasheet(PDF) 2 Page - Maxim Integrated Products |
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DS1643P-85 Datasheet(HTML) 2 Page - Maxim Integrated Products |
2 / 17 page DS1643/DS1643P 2 of 17 PIN DESCRIPTION PIN PDIP PowerCap NAME FUNCTION 1 1, 2, 3, 31–34 N.C. No Connection 2 30 A12 3 25 A7 4 24 A6 5 23 A5 6 22 A4 7 21 A3 8 20 A2 9 19 A1 10 18 A0 21 28 A10 23 29 A11 24 27 A9 25 26 A8 Address Inputs 11 16 DQ0 12 15 DQ1 13 14 DQ2 15 13 DQ3 16 12 DQ4 17 11 DQ5 18 10 DQ6 19 9 DQ7 Data Input/Output 20 8 CE Active-Low Chip-Enable Input 22 7 OE Active-Low Output-Enable Input 26 — CE2 Chip-Enable 2 Input (Active High) 27 6 WE Active-Low Write-Enable Input 28 5 VCC Power-Supply Input — 4 PFO Active-Low Power-Fail Output. This open-drain pin requires a pullup resistor for proper operation. 14 17 GND Ground — X1, X2, VBAT Crystal Connection, Battery Connection |
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