SM8578 Nippon_Precision_Circuits America, SM8578 Datasheet - Page 15

• Manufacturer Part Number: SM8578
• Description: Real-time Clock IC
• Manufacturer: Nippon_Precision_Circuits America

Monitoring Oscillator Frequency
A 1Hz signal is output from INTN when input CE is biased to 1/2V
By monitoring this output, the oscillator frequency can be adjusted by tuning an external capacitor (C
TYPICAL APPLICATION CIRCUIT
C1
R1
R2
C
G
SW
VDD
XT
XTN
VSS
XTN
XT
VDD
CE
VSS
SM8578BV
R1 = R2 ( ≈ 10kΩ)
R3 ≈ 10kΩ
C1 ≈ 0.1µF
DATA
INTN
SM8578BV
CLK
CE
INTN
DD
.
R3
NIPPON PRECISION CIRCUITS INC.—15
controller
Micro
VCC
GND
INTN output (1Hz)
VCC
G
).