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BU1852GUW-E2 Scheda tecnica(PDF) 5 Page - Rohm

Il numero della parte BU1852GUW-E2
Spiegazioni elettronici  Keyencoder IC
Download  26 Pages
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Produttore elettronici  ROHM [Rohm]
Homepage  http://www.rohm.com
Logo ROHM - Rohm

BU1852GUW-E2 Scheda tecnica(HTML) 5 Page - Rohm

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Technical Note
5/25
BU1852GUW, BU1852GXW
www.rohm.com
2012.08 - Rev.B
© 2012 ROHM Co., Ltd. All rights reserved.
5.
Startup sequence
Fig.3 Start Sequence timing
VDD=1.8V, VDDIO=1.8V, Topr=25℃, TW=VSS
Parameter
Symbol
Limits
Unit
Conditions
Min.
Typ.
Max.
VDD Stable Time
tVDD
-
-
5
ms
VDD and VDDIO are ON
at the same time.
Reset Wait Time
tRWAIT
0
-
-
µs
XRST controlling
1
Reset Valid Time
tRV
10
-
-
µs
I
2C Wait Time
tI2CWAIT
10
-
-
µs
1 Even if XRST port is not used, it operates because Power On Reset is built in.
In this case, connect XRST port with VDD on the set PCB.
Note) At VDD=0V, when SCL port is changed from 0V to 0.5V or more, SCL port pulls the current. It is same in SDA, XINT,
and ROW[7:0] ports of 3V tolerant I/O. (VDDIO=0V in case of COL[11:0] ports)
Fig.4 Port operating at VDD=0V
VDD
VDDIO
XRST
SCL
SDA
tVDD
tVDD
tRWAIT
tI2CWAIT
tRV
tI2CWAIT
tVDD
tRWAIT
tVDD
VDD
Port
(~2kΩ Pull-up) 0V
3V
Port
Pull Current
2~3ms
0.1~1mA
0V


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