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L9951XP bảng dữ liệu(PDF) 14 Page - STMicroelectronics

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L9951XP bảng dữ liệu(HTML) 14 Page - STMicroelectronics

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Electrical specifications
L9951 / L9951XP
14/36
Doc ID 14173 Rev 8
2.6
SPI - electrical characteristics
(VS = 8 to 16 V, VCC = 4.5 to 5.3 V, Tj = - 40 to 150 °C, unless otherwise specified. The
voltages are referred to GND and currents are assumed positive, when the current flows into
the pin).
Note:
Value of input capacity is not measured in production test. Parameter guaranteed by design.
Table 12.
Delay time from standby to active mode
Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit
tset
Internal startup time
Switching from standby
to active mode. Time
until not Ready Bit goes
low.
80
300
µs
Table 13.
Inputs: CSN, CLK, PWM1/2 and DI
Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit
VinL
Input low level
VCC = 5V
1.5
2.0
V
VinH
Input high level
VCC = 5V
3.0
3.5
V
VinHyst
Input hysteresis
VCC = 5V
0.5
V
ICSN in
Pull up current at input CSN
VCSN = 3.5V VCC = 5V
-50
-25
-10
µA
ICLK in
Pull down current at input CLK
VCLK = 1.5V
10
25
50
µA
IDI in
Pull down current at input DI
VDI = 1.5V
10
25
50
µA
IEN in
Pull down resistance at input
EN
100
210
480
k
Ω
C in
Input capacitance at input
CLK, DI and PWM
VCC = 0 to 5.3V
10
15
pF
Table 14.
DI timing(1)
Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit
tCLK
Clock period
VCC = 5V
1000
ns
tCLKH
Clock high time
VCC = 5V
400
ns
tCLKL
Clock low time
VCC = 5V
400
ns
tset CSN
CSN setup time, CSN low
before rising edge of CLK
VCC = 5V
400
ns
tset CLK
CLK setup time, CLK high
before rising edge of CSN
VCC = 5V
400
ns
tset DI
DI setup time
VCC = 5V
200
ns
thold time DI hold time
VCC = 5V
200
ns



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