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AS3421 数据表(PDF) 27 Page - ams AG

部件名 AS3421
功能描述  Low Power Ambient Noise-Cancel l ing Speaker Dr iver
PDF  61 Pages
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制造商  AMSCO [ams AG]
网页  http://www.ams.com
标志 AMSCO - ams AG

AS3421 数据表(HTML) 27 Page - ams AG

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www.austriamicrosystems.com
Revision 0.90
27 - 61
AS3421 AS3422
Datasheet - D e t a i l e d D e s c r i p t i o n
9.8.2
Parameter
Figure 34. 2-Wire Serial Timing
VBAT >=1.4V
1
, TA=25ºC, unless otherwise specified.
Table 14. 2-Wire Serial Parameter
Symbol
Parameter
Condition
Min
Typ
Max
Unit
VCSL
CSCL, CSDA Low Input Level
(max 30%VBAT)
0
-
0.42
V
VCSH
CSCL, CSDA High Input Level
CSCL, CSDA (min 70%VBAT)
0.98
-
V
HYST
CSCL, CSDA Input Hysteresis
200
450
800
mV
VOL
CSDA Low Output Level
at 3mA
-
-
0.4
V
Tsp
Spike insensitivity
50
100
-
ns
TH
Clock high time
max. 400kHz clock speed
500
ns
TL
Clock low time
max. 400kHz clock speed
500
ns
TSU
CSDA has to change Tsetup before rising edge
of CSCL
250
-
-
ns
THD
No hold time needed for CSDA relative to rising
edge of CSCL
0
-
-
ns
TS
CSDA H hold time relative to CSDA edge for
start/stop/rep_start
200
-
-
ns
TPD
CSDA prop delay relative to low going edge of
CSCL
50
ns
1. Serial interface operates down to VBAT = 1.0V but with 100kHz clock speed and degraded parameters.
8
1-7
CSCL
CSDA
8
9
8
1-7
8
9
8
1-7
8
9
Start
Condition
Address
R/W
ACK
Data
ACK
Data
ACK
Stop
Condition
TS
TSU
TH
TL
THD
TPD



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