D7225G NEC, D7225G Datasheet - Page 40

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D7225G

Manufacturer Part Number
D7225G
Description
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Manufacturer
NEC
Datasheet

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AC Characteristics (T
Notes 1. UNSYNCHRONIZED TRANSFER MOD
AC Timing Measurement Voltage
40
Operating frequency
Oscillation frequency
High level clock pulse width
Low level clock pulse width
/SCK frequency
High level /SCK pulse width
Low level /SCK pulse width
/BUSY
SI set time (against /SCK )
SI hold time (against /SCK )
8th pulse of /SCK
delay time
/CS
/BUSY low level time
C, /D set time (against 8th pulse
of SCK )
C, /D hold time (against 8th pulse
of SCK )
/CS hold time (against 8th pulse of
SCK )
High level /CS pulse width
Low level /CS pulse width
/SYNC load capacitance
2. BLINKING ON
3. 8/fc
/BUSY
For SYNCHRONIZED TRANSFER MODE,
t
/SCK hold time
WHCS
Item
delay time
(48/f
/BUSY
A
C
= 0 to +70 C, V
+ AC driver frequency)
Symbol
t
t
t
t
C
t
t
f
t
t
t
t
t
t
t
t
WHCS
DCSB
HKCS
WLCS
WHC
t
t
OSC
WLC
WHK
WLK
WLB
CYK
HBK
DKB
SDK
HKD
f
SIK
HKI
LSY
C
0.7V
0.3V
DD
DD
DD
= 2.7 V to 5.5 V)
R = 180 k
CL1, external clock
CL1, external clock
C
C
t
t
WHCS
CYC
Data Sheet S14308EJ6V0DS00
L
L
= 50 pF
= 50 pF
= 7.1 s
48/f
Measurement
C
points
Note 1
5%, V
Condition
C
L
= 50 pF
DD
= 3 V
10 %
0.7V
0.3V
DD
DD
Note 3
Note 3
MIN.
1.8
1.8
50
50
18
3
3
4
0
1
1
4
1
1
TYP.
100
44 (57)
MAX.
140
140
Note 2
16
16
50
5
5
PD7225
Unit
kHz
kHz
1/f
pF
ns
s
s
s
s
s
s
s
s
s
s
s
s
s
s
C

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