Rainbow-electronics DS1486P Manual de usuario

1 of 17 072401FEATURES§ 128 kbytes of user NV RAM§ Integrated NV SRAM, real-time clock,crystal, power-fail control circuit and lithiumenergy source§

DS1486/DS1486P10 of 17AC ELECTRICAL CHARACTERISTICS (0°C to 70°C; VCC = 5.0V ± 10%)DS1486-120 DS1486-150PARAMETER SYMBOL MIN MAX MIN MAX

DS1486/DS1486P11 of 17WRITE CYCLE 1 (Notes 2, 6, 7)WRITE CYCLE 2 (Notes 2, 8)TIMING DIAGRAM: INTERRUPT OUTPUTS PULSE MODE(SEE NOTES 11, 12)

DS1486/DS1486P12 of 17POWER-DOWN/POWER-UP TIMINGAC ELECTRICAL CHARACTERISTICSPOWER-UP POWER-DOWN TIMING

DS1486/DS1486P13 of 17NOTES:1. WE is high for a read cycle.2. OE = VIH or VIL. If OE = VIH during write cycle, the output buffers remain in a hi

DS1486/DS1486P14 of 17AC TEST CONDITIONSInput Levels: 0V to 3VTransition Times: 5 nsAC TEST CONDITIONSOutput Load: 50 pF + 1TTL GateInput Pulse Leve

DS1486/DS1486P15 of 17DS1486PPKG 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

DS1486/DS1486P16 of 17DS1486P 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

DS1486/DS1486P17 of 17RECOMMENDED POWERCAP MODULE LAND PATTERNPKG INCHESDIM MIN NOM MAXA- 1.050 -B- 0.826 -C- 0.050 -D- 0.030 -E- 0.112 -

DS1486/DS1486P2 of 17DESCRIPTIONThe DS1486 is a nonvolatile Static RAM with a full function Real-time clock (RTC), alarm, watchdogtimer, and interval

DS1486/DS1486P3 of 17DATA RETENTIONThe RAMified Timekeeper provides full functional capability when VCC is greater than 4.5 volts andwrite-protects t

DS1486/DS1486P4 of 17BLOCK DIAGRAM Figure 1

DS1486/DS1486P5 of 17TIME OF DAY REGISTERSRegisters 0, 1, 2, 4, 6, 8, 9, and A contain Time of Day data in BCD. Ten bits within these eight registersa

DS1486/DS1486P6 of 17WATCHDOG ALARM REGISTERSRegisters C and D contain the time for the Watchdog Alarm. The two registers contain a time count from00.

DS1486/DS1486P7 of 17TIME OF DAY ALARM MASK BITS Figure 3REGISTER(3) MINUTES (5) HOURS (7) DAYS1 1 1 ALARM ONCE PER MINUTE0 1 1 ALARM WHEN MINUTES MAT

DS1486/DS1486P8 of 17When the interrupt is in the pulse mode (see bit 4 definition), this flag will be in the logic 1 state onlyduring the time the in

DS1486/DS1486P9 of 17ABSOLUTE MAXIMUM RATINGS*Voltage on any Pin Relative to Ground -0.3V to +7.0VOperating Temperature 0°C to 70°CStorage Temperatu