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BR35H128FVT-WCTR Datasheet(PDF) 3 Page - Rohm

Part # BR35H128FVT-WCTR
Description  125??SPI BUS ICs BR35 Family
Download  17 Pages
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Manufacturer  ROHM [Rohm]
Direct Link  http://www.rohm.com
Logo ROHM - Rohm

BR35H128FVT-WCTR Datasheet(HTML) 3 Page - Rohm

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Technical Note
3/16
BR35H□□□-WC Series
www.rohm.com
2011.03 - Rev.C
© 2011 ROHM Co., Ltd. All rights reserved.
Pin Assignment and Description
Operating Timing Characteristics
Sync data input / output timing
(Ta=-40℃ to +125℃, unless otherwise specified, load capacitance CL1=100pF)
Parameter
Symbol
2.5≦Vcc≦5.5V
Unit
Min.
Typ.
Max.
SCK frequency
fSCK
-
-
5
MHz
SCK high time
tSCKWH
85
-
-
ns
SCK low time
tSCKWL
85
-
-
ns
CSB high time
tCS
85
-
-
ns
CSB setup time
tCSS
90
-
-
ns
CSB hold time
tCSH
85
-
-
ns
SCK setup time
tSCKS
90
-
-
ns
SCK hold time
tSCKH
90
-
-
ns
SI setup time
tDIS
20
-
-
ns
SI hold time
tDIH
30
-
-
ns
Data output delay time1
tPD1
-
-
70
ns
Data output delay time2
(CL2=30pF)
tPD2
-
-
55
ns
Output hold time
tOH
0
-
-
ns
Output disable time
tOZ
-
-
100
ns
SCK rise time
tRC
-
-
1
μs
SCK fall time
*1
tFC
-
-
1
μs
OUTPUT
rise time
tRO
-
-
50
ns
OUTPUT
fall time
tFO
-
-
50
ns
Write time
tE/W
-
-
5
ms
1 NOT 100% TESTED
AC measurement conditions
Parameter
Symbol
Limits
Unit
Min.
Typ.
Max.
Load capacitance 1
CL1
-
-
100
pF
Load capacitance 2
CL2
-
-
30
pF
Input rise time
-
-
-
50
ns
Input fall time
-
-
-
50
ns
Input voltage
-
0.2Vcc / 0.8Vcc
V
Input / Output judgment voltage
-
0.3Vcc / 0.7Vcc
V
tOZ measurement condition
IL is the load current that changes the SO voltage to 0.5×Vcc. IL = ±1mA.
After CSB starts to rise, the time needed for SO to change to High-Z is defined with 10% changing point from SO=High or
SO=Low.
Terminal Name
Input/Output
Function
Vcc
Power Supply to be connected
GND
All input / output reference voltage, 0V
CSB
Input
Chip select input
SCK
Input
Serial clock input
SI
Input
Start bit, ope code, address, and serial data input
SO
Output
Serial data output
NC
Non connection
Vcc
NC
SCK
SI
CSB
SO
NC
GND
BR35H160-WC
BR35H320-WC
BR35H640-WC
BR35H128-WC
Fig.2 Pin Assignment Diagram
Fig.3 Input timing
CSB
SCK
SI
SO
tCS
tCSS
tSCKS
tSCKWL
tSCKWH
tDIS tDIH
tRC
tFC
High-Z
Data through SI enters the IC in sync with the data
rise edge of SCK. Please input address and data
starting from the most significant bit MSB.
CSB
SCK
SI
SO
tPD
tOH
tRO,tFO
tOZ
tCSH tSCKH
tCS
High-Z
Fig.4 Input / Output timing
Data through SO is output in sync with the data fall
edge of SCK. Data is output starting from the most
significant bit MSB.
Vcc
NC
SCK
SI
CSB
SO
NC
GND
CL1=100pF
IL=±1mA
0.7Vcc
0.2Vcc
0.9Vcc
0.1Vcc
0.8Vcc
0.5Vcc
High
Low
CSB
SO
Signal Input
Signal Input
Signal Input
Fig.5
tOZ measurement circuit
Fig.6
tOZ measurement timing


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