Rainbow-electronics DS1302 Manual do Utilizador Página 9

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DS1302
041697 9/12
DC ELECTRICAL CHARACTERISTICS (cont’d) (0°C to 70°C; V
CC
= 2.5 to 5.5V*)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Timekeeping Current
I
CC2T
V
CC2
=2.5V
25.3
µA
413
Ti
me
k
eep
i
ng
C
urren
t
I
CC2T
V
CC2
=5V 81
µ
A
4
,
13
Standby Current
I
CC2S
V
CC2
=2.5V
25
µA
10 13
St
an
db
y
C
urren
t
I
CC2S
V
CC2
=5V 80
µ
A
10
,
13
Trickle Charge Resistors R1
R2
R3
2
4
8
K
K
K
Trickle Charger Diode Voltage Drop V
TD
0.7 V
*Unless otherwise noted.
CAPACITANCE (t
A
= 25°C)
PARAMETER SYMBOL CONDITION TYP MAX UNITS NOTES
Input Capacitance C
I
10 pF
I/O Capacitance C
I/O
15 pF
Crystal Capacitance C
X
6 pF
AC ELECTRICAL CHARACTERISTICS (0°C to 70°C; V
CC
= +5V ± 10%*)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Data to CLK Setup
t
DC
V
CC
=2.5V 200
ns
7
D
a
t
a
t
o
CLK
S
e
t
up
t
DC
V
CC
=5V 50
ns
7
CLK to Data Hold
t
CDH
V
CC
=2.5V 280
ns
7
CLK
t
o
D
a
t
a
H
o
ld
t
CDH
V
CC
=5V 70
ns
7
CLK to Data Delay
t
CDD
V
CC
=2.5V 800
ns
789
CLK
t
o
D
a
t
a
D
e
l
ay
t
CDD
V
CC
=5V 200
ns
7
,
8
,
9
CLK Low Time
t
CL
V
CC
=2.5V 1000
ns
7
CLK
L
ow
Ti
me
t
CL
V
CC
=5V 250
ns
7
CLK High Time
t
CH
V
CC
=2.5V 1000
ns
7
CLK
Hi
g
h
Ti
me
t
CH
V
CC
=5V 250
ns
7
CLK Frequency
t
CLK
V
CC
=2.5V 0.5
MHz
7
CLK
F
requency
t
CLK
V
CC
=5V DC 2.0
MH
z
7
CLK Rise and Fall
t
R
t
F
V
CC
=2.5V 2000
ns
CLK
Ri
se an
d
F
a
ll
t
R
,
t
F
V
CC
=5V 500
ns
RST to CLK Setup
t
CC
V
CC
=2.5V 4
µs
7
RST
t
o
CLK
S
e
t
up
t
CC
V
CC
=5V 1
µs
7
*Unless otherwise noted.
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