SM8580 Nippon_Precision_Circuits America, SM8580 Datasheet - Page 10

• Manufacturer Part Number: SM8580
• Description: Real-time Clock ic
• Manufacturer: Nippon_Precision_Circuits America

Backup Transfer and Return
1. Before switching the supply, confirm that the chip enable CE1 is LOW and that SM8580AM is deselected.
Supply voltage falling edge CE setup time
Supply voltage fall time
Supply voltage rise time
Supply voltage rising edge CE hold time
Parameter
1
V
CE1
V
CLK
DD
Symbol
V
IL
t
t
CD
t
CU
t
R
F
(V
(V
t
CD
DD
DD
− V
− V
SM8580AM
Condition
CLK
CLK
t
F
Backup mode
) ≤ 2.0V
) > 2.0V
min
50
t
0
2
1
0
CU
NIPPON PRECISION CIRCUITS INC.—10
t
R
Rating
V
max
IL
–
–
–
–
–
min
–
–
–
–
–
µs/V
µs/V
µs/V
Unit
µs
µs