Rainbow-electronics DS1647P Manual de usuario

1 of 11 072401FEATURES§ Integrates NV SRAM, real-time clock,crystal, power-fail control circuit and lithiumenergy source§ Clock registers are access

DS1647/DS1647P10 of 11DS1647 32-PIN PACKAGEPKG 32-PINDIM MIN MAXA IN.MM1.68042.671.74044.20B IN.MM0.71518.160.74018.80C IN.MM0.3358.510.3659.27D I

DS1647/DS1647P11 of 11DS1647P 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

DS1647/DS1647P2 of 11PIN DESCRIPTIONA0-A18 - Address InputCE - Chip EnableOE - Output EnableWE - Write EnableVCC - +5VGND - GroundDQ0-DQ7 - Data I

DS1647/DS1647P3 of 11 BLOCK DIAGRAM DS1647 Figure 1TRUTH TABLE DS1647 Table 1VCCCE OE WEMODE DQ POWERVIHX X DESELECT HIGH-Z STANDBYX X X DESELECT HIGH

DS1647/DS1647P4 of 11CLOCK ACCURACY (DIP MODULE)The DS1647 is guaranteed to keep time accuracy to within ±1 minute per month at 25°C. The RTC iscalibr

DS1647/DS1647P5 of 11RETRIEVING DATA FROM RAM OR CLOCKThe DS1647 is in the read mode whenever WE (write enable) is high; CE (chip enable) is low.

DS1647/DS1647P6 of 11ABSOLUTE MAXIMUM RATINGS*Voltage on Any Pin Relative to Ground -0.3V to +7.0VStorage Temperature -40°C to +85°CSoldering Temper

DS1647/DS1647P7 of 11AC ELECTRICAL CHARACTERISTICS (Over the Operating Range)PARAMETER SYMBOL MIN TYP MAX UNITS NOTESRead Cycle Time tRC120 nsAddress

DS1647/DS1647P8 of 11DS1647 READ CYCLE TIMINGDS1647 WRITE CYCLE TIMING

DS1647/DS1647P9 of 11POWER-DOWN/POWER-UP TIMINGNOTES:1. All voltages are referenced to ground.2. Typical values are at 25°C and nominalsupplies.3.