DS17285(1998) View Datasheet(PDF) - Dallas Semiconductor -> Maxim Integrated
Part Name
Description
Manufacturer
DS17285 Datasheet PDF : 32 Pages
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DS17285/DS17287
BURST MODE TIMING WAVEFORM
ALE
CS
ÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇ
AD(7:0)
53h
DATA
RD OR WR
PWRWL
PWRWH
ÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇ
DATA
ADDRESS + 1
ADDRESS + 2
NOTES:
1. All voltages are referenced to ground.
2. Typical values are at 25°C and nominal supplies.
3. Outputs are open.
4. Write protection trip point occurs during power fail prior to switchover from VCC to VBAT.
5. Applies to the AD0–AD7 pins, and the SQW pin when each is in a high impedance state.
6. The IRQ and PWR pins are open drain.
7. Measured with a load of 50 pF + 1 TTL gate.
8. Wakeup kickstart timeout generated only when the oscillator is enabled and the countdown chain is not reset.
9. VSW is determined by the larger of VBAT and VBAUX.
10. The DS17287 will keep time to an accuracy of ±1 minute per month during data retention time for the period
of tDR.
11. tDR is the amount of time that the internal battery can power the internal oscillator and internal registers of the
DS17287.
12. IBAT1 and IBAT2 are measured at VBAT = 3.5V.
13. Real–Time Clock Modules can be successfully processed through conventional wave–soldering techniques as
long as temperature exposure to the lithium energy source contained within does not exceed +85°C. Post solder
cleaning with water washing techniques is acceptable, provided that ultrasonic vibration is not used.
030598 28/32
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