Datasheet

DS1390–DS1394
Low-Voltage SPI/3-Wire RTCs with
Trickle Charger
25
Maxim Integrated
DS1390/
DS1394
DS1393
DS1391
DS1392
CE
SQW
I/O
CPU
V
CC
V
CC
V
CC
DIN
CS
GND
X2X1
CRYSTAL
SQW/INT
V
BACKUP
SCLK
DOUT
INT
CPU
V
CC
V
CC
V
CC
CE
GND
X2X1
CRYSTAL
SQW/INT
V
BACKUP
SCLK
I/O
CPU
V
CC
V
CC
V
CC
DIN
RST
RST
CS
GND
X2X1
CRYSTAL
V
BACKUP
SCLK
DOUT
CPU
V
CC
V
CC
V
CC
GND
X2X1
CRYSTAL
V
BACKUP
SCLK
RST
RST
Typical Operating Circuits
Package Information
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or
“-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the
package regardless of RoHS status.
PACKAGE TYPE PACKAGE CODE OUTLINE NO.
LAND
PATTERN NO.
10 µSOP —
21-0061
90-0330