RTC with Constant-Voltage Trickle Charger
DS12R885/DS12CR887/DS12R887
AC ELECTRICAL CHARACTERISTICS
(V
CC
= 2.97V to 3.63V,
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
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
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
(Note 8)
0
15
8
0
5
0
30
15
15
45
55
20
70
5
0
0
2
2
80
55
CONDITIONS
MIN
280
130
90
30
TYP
MAX
DC
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs
µs
µs
4
_____________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
