DS1556_10 Datasheet, PDF (16/18 Pages) Maxim Integrated Products – 1M, Nonvolatile, Y2K-Compliant Timekeeping RAM

DS1556 1M, Nonvolatile, Y2K-Compliant Timekeeping RAM
POWER-UP/DOWN CHARACTERISTICS—3.3V
(V_CC = 3.3V 10%, Over the Operating Range.)
PARAMETER
CE or WE at V_IH, Before
Power-Down
SYMBOL
t_PD
CONDITIONS
V_CC Fall Time: V_PF(MAX) to V_PF(MIN)
t_F
V_CC Rise Time: V_PF(MIN) to V_PF(MAX)
t_R
V_PF to RST High
t_REC
Expected Data-Retention Time
(Oscillator On)
t_DR
(Notes 6, 7)
MIN
0
300
0
40
10
TYP
MAX
200
UNITS
s
s
s
ms
years
Figure 9. Power-Up/Down Waveform Timing (3.3V Device)
CAPACITANCE
(T_A = +25°C)
PARAMETER
Capacitance on All Input Pins
Capacitance on IRQ/FT, RST,
and DQ Pins
SYMBOL CONDITIONS
C_IN
(Note 1)
C_IO
(Note 1)
MIN TYP
MAX
14
UNITS
pF
10
pF
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