DS1553 Datasheet, PDF (17/20 Pages) Maxim Integrated Products – 64kB, Nonvolatile, Year-2000-Compliant Timekeeping RAM

DS1553 64kB, Nonvolatile, Year-2000-Compliant Timekeeping RAM
POWER-UP/DOWN CHARACTERISTICS
(V_CC = 3.3V ±10%, T_A = Over the operating range.)
PARAMETER
SYMBOL MIN
CE or WE at V_IH, Before Power-Down
t_PD
0
V_CC Fall Time: V_PF(MAX) to V_PF(MIN)
t_F
300
V_CC Rise Time: V_PF(MIN) to V_PF(MAX)
t_R
0
V_PF to RST High
Expected Data Retention Time
(Oscillator On)
t_REC
40
t_DR
10
TYP
MAX
200
UNITS
s
s
s
ms
years
NOTES
6, 7
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
C_IN
C_IO
MIN
TYP
MAX
7
10
UNITS
pF
pF
NOTES
1
1
17 of 20