DS12CR885 Datasheet, PDF (3/22 Pages) Maxim Integrated Products – RTC with Constant-Voltage Trickle Charger

RTC with Constant-Voltage Trickle Charger
DC ELECTRICAL CHARACTERISTICS (DS12R885 Only)
(V_CC = 0V, V_BACKUP = 3.2V, T_A = -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
V_BACKUP Current (OSC On);
T_A = +25°C, V_BACKUP = 3.0V
V_BACKUP Current (Oscillator Off)
SYMBOL
I_BACKUP2 (Note 7)
I_BACKUPDR (Note 7)
CONDITIONS
MIN TYP MAX UNITS
800 1000
nA
100
nA
AC ELECTRICAL CHARACTERISTICS
(V_CC = 4.5V to 5.5V, T_A = -40°C to +85°C.) (Note 1)
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
SYMBOL
t_CYC
PW_EL
PW_EH
t_R, t_F
t_RWH
t_RWS
t_CS
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
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
(Note 8)
CONDITIONS
MIN TYP MAX UNITS
180
DC
ns
80
ns
65
ns
30
ns
0
ns
10
ns
5
ns
0
ns
5
35
ns
0
ns
20
ns
5
ns
10
ns
30
ns
35
ns
15
60
ns
50
ns
5
µs
0
2
µs
0
2
µs
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