RTC with Constant-Voltage Trickle Charger
AC ELECTRICAL CHARACTERISTICS
(V
= 2.97V to 3.63V, T = -40°C to +85°C.) (Note 1)
A
CC
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Cycle Time
t
280
DC
ns
CYC
Pulse Width, DS Low or R/W High
Pulse Width, DS High or R/W Low
Input Rise and Fall
PW
130
90
ns
ns
ns
ns
ns
EL
PW
EH
t , t
R
30
55
F
R/W Hold Time
t
0
RWH
R/W Setup Time Before DS
t
15
RWS
Chip-Select Setup Time Before
DS or R/W
t
8
ns
CS
Chip-Select Hold Time
Read-Data Hold Time
t
0
ns
ns
ns
ns
ns
ns
ns
ns
CH
t
5
DHR
Write-Data Hold Time
t
0
DHW
Address Valid Time to AS Fall
Address Hold Time to AS Fall
Delay Time DS to AS Rise
Pulse Width AS High
t
30
15
15
45
55
ASL
AHL
ASD
t
t
PW
ASH
Delay Time, AS to DS Rise
t
ASED
Output Data Delay Time from DS
or R/W
t
(Note 8)
20
80
ns
DDR
Data Setup Time
t
70
5
ns
µs
µs
µs
DSW
Reset Pulse Width
t
RWL
IRDS
IRQ Release from DS
IRQ Release from RESET
t
0
2
2
t
0
IRR
4
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DALLAS [ DALLAS SEMICONDUCTOR ]
