DS12R885 Maxim, DS12R885 Datasheet - Page 3

• Manufacturer Part Number: DS12R885
• Description: The DS12R885 is a functional drop-in replacement for the DS12885 real-time clock (RTC)
• Manufacturer: Maxim

AC ELECTRICAL CHARACTERISTICS
(V
DC ELECTRICAL CHARACTERISTICS (DS12R885 Only)
(V
V
T
V
Cycle Time
Pulse Width, DS Low or R/W
Pulse Width, DS High or R/W
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
CC
A
CC
BACKUP
BACKUP
= +25°C, V
= 4.5V to 5.5V, T
= 0V, V
RTCs with Constant-Voltage Trickle Charger
Current (OSC On);
Current (Oscillator Off)
PARAMETER
PARAMETER
BACKUP
BACKUP
= 3.2V, T
A
= 3.0V
= -40°C to +85°C.) (Note 1)
A
= -40°C to +85°C, unless otherwise noted.) (Note 1)
I
SYMBOL
BACKUPDR
SYMBOL
I
BACKUP2
PW
PW
PW
t
t
t
t
t
t
t
t
t
t
ASED
t
t
t
t
IRDS
t
CYC
R
RWH
RWS
t
DHR
DHW
ASD
DDR
DSW
RWL
t
ASL
AHL
IRR
CH
CS
, t
ASH
EH
EL
_____________________________________________________________________
F
(Note 7)
(Note 7)
(Note 8)
CONDITIONS
CONDITIONS
MIN
MIN
180
80
65
10
20
10
30
35
15
50
0
5
0
5
0
5
5
0
0
TYP
TYP
800
MAX
1000
MAX
100
DC
30
35
60
2
2
UNITS
UNITS
nA
nA
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
μs
μs
μs
3