DS1390 Maxim, DS1390 Datasheet - Page 3

• Manufacturer Part Number: DS1390
• Description: The low-voltage serial-peripheral interface (SPI™) DS1390/DS1391/DS1394 and the low-voltage 3-wire DS1392/DS1393 real-time clocks (RTCs) are clocks/calendars that provide hundredths of a second, seconds, minutes, hours, day, date, month, and ye
• Manufacturer: Maxim

RECOMMENDED DC OPERATING CONDITIONS (continued)
(V
unless otherwise noted.) (Note 1)
DC ELECTRICAL CHARACTERISTICS
(V
AC ELECTRICAL CHARACTERISTICS—SPI INTERFACE
(V
V
SQW Off
V
SQW On (32kHz)
V
SQW On, V
T
V
(Data Retention)
SCLK Frequency (Note 13)
Data to SCLK Setup
SCLK to Data Hold
SCLK to Data Valid
(Notes 13, 14, 15)
SCLK Low Time (Note 13)
SCLK High Time (Note 13)
SCLK Rise and Fall
CS to SCLK Setup (Note 13)
SCLK to CS Hold (Note 13)
CS Inactive Time (Note 13)
CS to Output High Impedance
V
(Note 11)
V
(V
V
CC
CC
A
CC
CC
BACKUP
CC
BACKUP
BACKUP
BACKUP
BACKUP
BACKUP
= +25°C
= V
= 0V, V
= V
Standby Current
= V
CC(MIN)
CC(MIN)
CC(MAX)
PARAMETER
PARAMETER
Leakage Current
PARAMETER
Current OSC On,
Current OSC On,
Current OSC On,
Current, OSC Off
= 3.7V,
BACKUP
BACKUP
to V
to V
)
CC(MAX)
= 3.0V,
CC(MAX)
= 3.7V, T
, T
, T
A
A
A
= -40°C to +85°C, unless otherwise noted.) (Note 1)
= -40°C to +85°C, unless otherwise noted. Typical values are at nominal supply voltage and T
= -40°C to +85°C, unless otherwise noted.) (Note 1)
I
BACKUPLKG
I
SYMBOL
BACKUPDR
SYMBOL
SYMBOL
I
I
I
BACKUP3
Low-Voltage SPI/3-Wire RTCs with
BACKUP1
BACKUP2
I
f
t
t
CCS
t
t
t
t
SCLK
R
CWH
t
CDH
CDD
t
t
CCH
CDZ
t
DC
CH
CC
CL
, t
_____________________________________________________________________
F
(Note 12)
(Note 12)
(Note 12)
(Note 12)
2.7V
1.71V
(Notes 13, 14)
(Notes 13, 14)
2.7V
1.71V
2.7V
1.71V
2.7V
1.71V
2.7V
1.71V
(Notes 13, 14)
-33
-3
-18
V
V
V
V
V
V
V
V
V
V
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
5.5V
5.5V
5.5V
5.5V
5.5V
1.89V
1.89V
1.89V
1.89V
1.89V
CONDITIONS
CONDITIONS
CONDITION
Trickle Charger
MIN
MIN
MIN
110
400
110
400
400
100
400
500
30
30
0
0
TYP
TYP
TYP
500
600
600
115
25
80
60
15
MAX
MAX
MAX
1000
1150
1000
160
200
175
125
100
100
100
80
40
4
1
A
= +25°C,
UNITS
UNITS
UNITS
MHz
μA
nA
nA
nA
nA
nA
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
3