Rainbow Electronics DS1393 - Manual (Page 23)

DS1390/DS1391/DS1392/DS1393
Low-Voltage SPI/3-Wire RTCs with
Trickle Charger
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DS1390
DS1393
DS1391
DS1392
CE
SQW
I/O
CPU
V CC
V CC
V CC
DIN
CS
GND
X2 X1
CRYSTAL
SQW/INT
V BACKUP
SCLK
DOUT
INT
CPU
V CC
V CC
V CC
CE
GND
X2 X1
CRYSTAL
SQW/INT
V BACKUP
SCLK
I/O
CPU
V CC
V CC
V CC
DIN
RST RST
CS
GND
X2 X1
CRYSTAL
V BACKUP
SCLK
DOUT
CPU
V CC
V CC
V CC
GND
X2 X1
CRYSTAL
V BACKUP
SCLK
RST RST
Typical Operating Circuits