DS12885_10 Datasheet, PDF (3/22 Pages) Maxim Integrated Products – Real-Time Clocks

Real-Time Clocks
DC ELECTRICAL CHARACTERISTICS
(V_CC = 0V, V_BAT = 3.0V, T_A = over the operating range, unless otherwise noted.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
V_BAT Current (OSC On);
T_A = +25°C, V_BACKUP = 3.0V
V_BAT Current (Oscillator Off)
I_BAT
I_BATDR
(Note 8)
(Note 8)
MIN TYP MAX UNITS
500
nA
100
nA
AC ELECTRICAL CHARACTERISTICS
(V_CC = 4.5V to 5.5V, T_A = over the operating range.) (Note 2)
PARAMETER
Cycle Time
Pulse Width, DS Low or R/W High
Pulse Width, DS High or R/W Low
Input Rise and Fall
R/W Hold Time
R/W Setup Time Before DS/E
Chip-Select Setup Time Before
DS or R/W
Chip-Select Hold Time
Read-Data Hold Time
Write-Data Hold Time
Address Valid Time to AS Fall
Address Hold Time to AS Fall
Delay Time DS/E to AS Rise
Pulse Width AS High
Delay Time, AS to DS/E Rise
Output Data Delay Time from DS
or R/W
Data Setup Time
Reset Pulse Width
IRQ Release from DS
IRQ Release from RESET
SYMBOL
t_CYC
PW_EL
PW_EH
t_R, t_F
t_RWH
t_RWS
t_CS
t_CH
t_DHR
t_DHW
t_ASL
t_AHL
t_ASD
PW_ASH
t_ASED
t_DDR
t_DSW
t_RWL
t_IRDS
t_IRR
CONDITIONS
MIN TYP MAX UNITS
385
DC
ns
150
ns
125
ns
30
ns
10
ns
50
ns
20
ns
0
ns
10
80
ns
0
ns
30
ns
10
ns
20
ns
60
ns
40
ns
20
120
ns
100
ns
5
µs
2
µs
2
µs
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