Rainbow-electronics DS1243Y Manual de usuario

1 of 13 080299FEATURES§ Real time clock keeps track of hundredths ofseconds, seconds, minutes, hours, days, dateof the month, months, and years§ 8K

DS1243Y10 of 13MEMORY WRITE CYCLE 2 (NOTES 2 AND 8)RESET FOR PHANTOM CLOCKREAD CYCLE TO PHANTOM CLOCK

DS1243Y11 of 13WRITE CYCLE TO PHANTOM CLOCKPOWER-DOWN/POWER-UP CONDITION

DS1243Y12 of 13NOTES: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 high impedance

DS1243Y13 of 13DS1243Y 28–PIN EXTENDED BOTTOM720-MIL BODY WIDTH (DIMENSION B)PKG 28-PINDIM MIN MAXA IN.MM1.52038.611.54039.12B IN.MM0.69517.650.7201

DS1243Y2 of 13The Phantom Clock provides timekeeping information including hundredths of seconds, seconds,minutes, hours, day, date, month, and year i

DS1243Y3 of 13Data transfer to and from the timekeeping function is accomplished with a serial bit stream under controlof Chip Enable (CE), Output Ena

DS1243Y4 of 13PHANTOM CLOCK REGISTER DEFINITION Figure 1NOTE:The pattern recognition in Hex is C5, 3A, A3, 5C, C5, 3A, A3, 5C. The odds of this patter

DS1243Y5 of 13PHANTOM CLOCK REGISTER DEFINITION Figure 2AM–PM/12/24 MODEBit 7 of the hours register is defined as the 12– or 24–hour mode select bit.

DS1243Y6 of 13ABSOLUTE MAXIMUM RATINGS*Voltage on Any Pin Relative to Ground –0.3V to +7.0VOperating Temperature 0°C to 70°CStorage Temperature –40

DS1243Y7 of 13MEMORY AC ELECTRICALCHARACTERISTICS (0°C to 70°C; VCC = 5.0V ± 10%)DS1243Y-120 DS1243Y-150 D

DS1243Y8 of 13PHANTOM CLOCK AC ELECTRICALCHARACTERISTICS (0°C to 70°C; VCC = 4.5 to 5.5V)PARAMETER SYMBOL

DS1243Y9 of 13MEMORY READ CYCLE (NOTE 1)MEMORY WRITE CYCLE 1 (NOTES 2, 6, AND 7)