Rainbow-electronics DS1646P Manuel d'utilisateur

1 of 11 022101FEATURES Integrates NV SRAM, real time clock,crystal, power-fail control circuit and lithiumenergy source Clock registers are access

DS1646/DS1646P10 of 11DS1646 32-PIN PACKAGEPKG 28-PINDIM MIN MAXA IN.MM1.67038.421.69038.93B IN.MM0.71518.160.74018.80C IN.MM0.3358.510.3659.27D I

DS1646/DS1646P11 of 11DS1646P WITH DS9034PCX ATTACHEDPKG INCHESDIM MIN NOM MAXA0.920 0.925 0.930B0.955 0.960 0.965C0.240 0.245 0.250D0.052 0.055 0.058

DS1646/DS1646P2 of 11PIN DESCRIPTIONA0-A16 - Address InputCE - Chip EnableOE - Output EnableWE - Write EnableVCC - +5VGND - GroundDQ0-DQ7 - Data I

DS1646/DS1646P3 of 11BLOCK DIAGRAM DS1646 Figure 1TRUTH TABLE DS1646 Table 1VCCCE OE WEMODE DQ POWERVIHX X DESELECT HIGH-Z STANDBYX X X DESELECT HIGH-

DS1646/DS1646P4 of 11CLOCK ACCURACY (DIP MODULE)The DS1646 is guaranteed to keep time accuracy to within ±1 minute per month at 25°C. The RTC iscalibr

DS1646/DS1646P5 of 11WRITING DATA TO RAM OR CLOCKThe DS1646 is in the write mode whenever WE and CE are in their active state. The start of a writ

DS1646/DS1646P6 of 11ABSOLUTE MAXIMUM RATINGS*Voltage on Any Pin Relative to Ground -0.3V to +7.0VStorage Temperature -40°C to +85°CSoldering Temper

DS1646/DS1646P7 of 11AC ELECTRICAL CHARACTERISTICS (Over the Operating Range)PARAMETER SYMBOL MIN TYP MAX UNITS NOTESRead Cycle Time tRC120 nsAddress

DS1646/DS1646P8 of 11DS1646 READ CYCLE TIMINGDS1646 WRITE CYCLE TIMING

DS1646/DS1646P9 of 11POWER-DOWN/POWER-UP TIMINGNOTES:1. All voltages are referenced to ground.2. Typical values are at 25°C and nominalsupplies.3.