參數(shù)資料
型號： UPD78001BCWA
廠商： NEC Corp.
元件分類： DC/DC變換器
英文描述： 1 watt dc-dc converters
中文描述： 1瓦的DC - DC轉(zhuǎn)換器
文件頁數(shù)： 40/62頁
文件大?。?/td> 576K
代理商： UPD78001BCWA
40
μ
PD78001B(A), 78002B(A)
(e) 2-wire serial I/O mode (SCK... Internal clock output)
Parameter
Symbol
Test Conditions
MIN.
TYP.
MAX.
Unit
SCK cycle time
t
KCY5
V
DD
= 4.5 to 6.0 V
1600
ns
3800
ns
SCK high-level width
t
KH5
R = 1 k
, C = 100 pF
*
t
KCY5
/2-50
ns
SCK low-level width
t
KL5
t
KCY5
/2-50
ns
SB0, SB1 setup time
t
SIK5
300
ns
(to SCK
↑
)
SB0, SB1 hold time
t
KSI5
600
ns
(from SCK
↑
)
SB0, SB1 output delay time
t
KSO5
R = 1 k
,
V
DD
= 4.5 to 6.0 V
0
250
ns
from SCK
↓
C = 100 pF
*
0
1000
ns
*
R and C are the load resistors and load capacitance of the SCK0, SB0 and SB1 output line.
(f) 2-wire serial I/O mode (SCK... External clock input)
Parameter
Symbol
Test Conditions
MIN.
TYP.
MAX.
Unit
SCK cycle time
t
KCY6
V
DD
= 4.5 to 6.0 V
1600
ns
3800
ns
SCK high-level width
t
KH6
650
ns
SCK low-level width
t
KL6
800
ns
SB0, SB1 setup time
t
SIK6
100
ns
(to SCK
↑
)
SB0, SB1 hold time
t
KSI6
t
KCY6
/2
ns
(from SCK
↑
)
SB0, SB1 output delay time
t
KSO6
R = 1 k
,
V
DD
= 4.5 to 6.0 V
0
300
ns
from SCK
↓
C = 100 pF
*
0
1000
ns
SCK rise, fall time
When external device expansion
function is used
160
ns
When external device expansion
function is not used
1000
ns
*
R and C are the load resistors and load capacitance of the SCK0, SB0 and SB1 output line.
t
R6
t
F6
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