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BR25S640FVM-W Datasheet(PDF) 4 Page - Rohm

Part # BR25S640FVM-W
Description  High speed clock action up to 20MHz(Max.), Wait function by HOLDB terminal.
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Manufacturer  ROHM [Rohm]
Direct Link  http://www.rohm.com
Logo ROHM - Rohm

BR25S640FVM-W Datasheet(HTML) 4 Page - Rohm

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Technical Note
4/18
BR25S□□□ Series
www.rohm.com
2010.12 - Rev.B
© 2010 ROHM Co., Ltd. All rights reserved.
●Pin assignment and description
Terminal
name
Input
/Output
Function
Vcc
-
Power source 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
HOLDB
Input
Hold input
Command communications may be suspended temporarily
(HOLD status)
WPB
Input
Write protect input
Write command is prohibited
Write status register command is prohibited
●Sync data input / output timing
●AC timing characteristics conditions
Parameter
Symbol
Limits
Unit
Min.
Typ.
Max.
Load capacity
CL
-
-
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
●Characteristic data (The following characteristic data are Typ. Values.)
Vcc
HOLDB
SCK
SI
CSB
SO
WPB
GND
BR25S320-W
BR25S640-W
BR25S128-W
BR25S256-W
Fig.2 Pin assignment diagram
Fig.3
Input timing
CSB
SCK
SI
SO
tCS
tCSS
tSCKS
tSCKWL
tSCKWH
tDIS
tDIH
tRC
tFC
High-Z
SI is taken into IC inside in sync with data rise edge of
SCK. Input address and data from the most significant bit
MSB
Fig.4
Input / Output timing
CSB
SCK
SI
SO
tPD
tOH
tRO,tFO
tOZ
tCSH tSCKH
tCS
High-Z
Fig.5
HOLD timing
CSB
SCK
SI
n+1
"H"
"L"
n
Dn
n-1
Dn
Dn-1
HOLDB
SO
Dn+1
tHFS
tHFH
tHOZ
tHRS tHRH
tDIS
tHPD
High-Z
SO is output in sync with data fall edge of SCK. Data is
output from the most significant bit MSB.
0
0.2
0.4
0.6
0.8
1
0
12
345
6
IOL[mA]
Ta=-40℃
Ta=25℃
Ta=85℃
SPEC
Fig.8 "L" output voltage VOL1 (Vcc=2.5V)
0
1
2
3
4
5
6
01
2
34
56
Vcc[V]
SPEC
Ta=-40℃
Ta=25℃
Ta=85℃
Fig.6
 "H" input voltage VIH(CSB,SCK,SI,HOLDB,WPB)
0
1
2
3
4
5
6
01
2
3
456
Vcc[V]
SPEC
Ta=-40℃
Ta=25℃
Ta=85℃
Fig.7  "L" input voltage VIL(CSB,SCK,SI,HOLDB,WPB)


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