DS12CR887 Maxim, DS12CR887 Datasheet - Page 4

• Manufacturer Part Number: DS12CR887
• Description: The DS12R885 is a functional drop-in replacement for the DS12885 real-time clock (RTC)
• Manufacturer: Maxim

AC ELECTRICAL CHARACTERISTICS
(V
RTCs with Constant-Voltage Trickle Charger
4
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
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 to AS Rise
Pulse Width AS High
Delay Time, AS to DS 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
_____________________________________________________________________
= 2.97V to 3.63V, T
PARAMETER
A
= -40°C to +85°C.) (Note 1)
SYMBOL
PW
PW
t
PW
t
t
t
t
t
t
t
t
t
ASED
t
t
t
t
t
R
RWH
RWS
DHW
DSW
IRDS
CYC
t
DHR
ASD
DDR
RWL
t
ASL
AHL
IRR
CS
CH
, t
ASH
EH
EL
F
(Note 8)
CONDITIONS
MIN
280
130
90
15
30
15
15
45
55
20
70
0
8
0
5
0
5
0
0
TYP
MAX
DC
30
55
80
2
2
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
μs
μs
μs