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| DS1390 Datasheet, PDF (23/24 Pages) Maxim Integrated Products – Low-Voltage SPI/3-Wire RTCs with Trickle Charger | |||
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Low-Voltage SPI/3-Wire RTCs with
Trickle Charger
Typical Operating Circuits
CRYSTAL
VCC
VCC
X1
X2
VCC
CS
CPU
SCLK
SQW/INT
DOUT
DIN
DS1390
VBACKUP
GND
VCC
CPU
RST
CRYSTAL
VCC
X1
CS
SCLK
DOUT
DIN
RST
X2
VCC
DS1391
VBACKUP
GND
CRYSTAL
VCC
VCC
X1
X2
VCC
CE
SQW
CPU
SCLK
I/O
DS1392
INT
VBACKUP
GND
VCC
CPU
RST
CRYSTAL
VCC
X1
CE
SCLK
I/O
RST
X2
VCC
SQW/INT
DS1393
VBACKUP
GND
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