Rainbow-electronics DS1643P Manual do Utilizador

1 of 14 022101FEATURES Integrated NV SRAM, real time clock,crystal, power-fail control circuit and lithiumenergy source Clock registers are access

DS1643/DS1643P10 of 14AC TEST CONDITIONSOutput Load: 100 pF + 1TTL GateInput Pulse Levels: 0.0 to 3.0 VoltsTiming Measurement Reference Levels:Input

DS1643/DS1643P11 of 14DS1643 28-PIN PACKAGEPKG 28-PINDIM MIN MAXA IN.MM1.47037.341.49037.85B IN.MM0.67517.750.74018.80C IN.MM0.3158.510.3359.02D I

DS1643/DS1643P12 of 14DS1643PPKG INCHESDIM MIN NOM MAXA0.920 0.925 0.930B0.980 0.985 0.990C- - 0.080D0.052 0.055 0.058E0.048 0.050 0.052F0.015 0.020 0

DS1643/DS1643P13 of 14DS1643P 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

DS1643/DS1643P14 of 14RECOMMENDED POWERCAP MODULE LAND PATTERNPKG INCHESDIM MIN NOM MAXA- 1.050 -B- 0.826 -C- 0.050 -D- 0.030 -E- 0.112 -

DS1643/DS1643P2 of 14PIN DESCRIPTIONA0-A12 - Address InputCE - Chip EnableCE2 - Chip Enable 2 (DIP Module only)OE - Output EnableWE - Write Ena

DS1643/DS1643P3 of 14BLOCK DIAGRAM DS1643 Figure 1DS1643 TRUTH TABLE Table 1VCCCECE2OE WEMODE DQ POWERVIHX X X DESELECT HIGH Z STANDBYXVILX X DESELECT

DS1643/DS1643P4 of 14DS1643 REGISTER MAP - BANK1 Table 2DATAADDRESSB7B6B5B4B3B2B1B0FUNCTION1FFF - - - - - - - - YEAR 00-991FFE X X X - - - - - MONTH 0

DS1643/DS1643P5 of 14level. The RST signal is an open drain output and requires a pull up. Except for the RST , all control, data,and address signal

DS1643/DS1643P6 of 14ABSOLUTE MAXIMUM RATINGS*Voltage on Any Pin Relative to Ground -0.3V to +7.0VOperating Temperature 0°C to 70°CStorage Temperatu

DS1643/DS1643P7 of 14READ CYCLE, AC CHARACTERISTICS (0°C to 70°C; VCC = 5.0V ±=10%)70 ns access 100 ns accessPARAMETER SYMBOL MIN MAX MIN

DS1643/DS1643P8 of 14WRITE CYCLE TIMING DIAGRAM, WRITE-ENABLE CONTROLLEDWRITE CYCLE TIMING DIAGRAM, CE , CE2 CONTROLLED

DS1643/DS1643P9 of 14POWER-UP/DOWN AC CHARACTERISTICS (0°C to 70°C; VCC = 5.0V ±=10%)PARAMETER SYMBOL MIN TYP MAX UNITS NOTESCE or WE at VIH, C