参数资料
型号: BR25S320F-WE2
厂商: Rohm Semiconductor
文件页数: 4/19页
文件大小: 0K
描述: IC EEPROM SPI 32KB 20MHZ 8-SOP
标准包装: 1
格式 - 存储器: EEPROMs - 串行
存储器类型: EEPROM
存储容量: 32K (4K x 8)
速度: 20MHz
接口: SPI 3 线串行
电源电压: 1.7 V ~ 5.5 V
工作温度: -40°C ~ 85°C
封装/外壳: 8-SOIC(0.173",4.40mm 宽)
供应商设备封装: 8-SOP
包装: 标准包装
其它名称: BR25S320F-WE2DKR
BR25S □□□ Series
● Pin assignment and description
Technical Note
Vcc
HOLDB
SCK
SI
Terminal
name
Input
/Output
Function
Vcc
-
Power source to be connected
BR25S320-W
BR25S640-W
BR25S128-W
BR25S256-W
GND
CSB
SCK
SI
SO
-
Input
Input
Input
Output
All input / output reference voltage, 0V
Chip select input
Serial clock input
Start bit, ope code, address, and serial data input
Serial data output
CSB
SO
WPB
GND
HOLDB
Input
Hold input
Command communications may be suspended temporarily
(HOLD status)
Write protect input
Fig.2 Pin assignment diagram
WPB
Input
Write command is prohibited
Write status register command is prohibited
● Sync data input / output timing
tCS
tCSS
tCS
CSB
tSCKS
tSCKWL
tSCKWH
tRC
tFC
CSB
tCSH tSCKH
SCK
tDIS tDIH
SCK
SI
SI
tPD
tOH
tRO,tFO
tOZ
High-Z
SO
High-Z
SO
Fig.3 Input timing
Fig.4
Input / Output timing
SI is taken into IC inside in sync with data rise edge of
SCK. Input address and data from the most significant bit
MSB
"H"
CSB
SO is output in sync with data fall edge of SCK. Data is
output from the most significant bit MSB.
"L"
tHFS
tHFH
tHRS tHRH
SCK
tDIS
SI
n+1
tHOZ
tHPD
n
n-1
SO
Dn+1
Dn
High-Z
Dn
Dn-1
HOLDB
Fig.5
HOLD timing
● AC timing characteristics conditions
Parameter
Load capacity
Input rise time
Input fall time
Symbol
C L
-
-
Min.
-
-
-
Limits
Typ.
-
-
-
Max.
30
50
50
Unit
pF
ns
ns
Input voltage
Input / Output judgment voltage
-
-
0.2Vcc/0.8Vcc
0.3Vcc/0.7Vcc
V
V
● Characteristic data (The following characteristic data are Typ. Values.)
6
6
1
5
4
Ta=-40℃
Ta=25℃
Ta=85℃
SPEC
5
4
Ta=-40℃
Ta=25℃
Ta=85℃
0.8
Ta=-40℃
Ta=25℃
Ta=85℃
0.6
3
2
3
2
0.4
SPEC
1
0
1
0
SPEC
0.2
0
0
1
2
3
4
5
6
0
1
2
3
4
5
6
0
1
2
3
4
5
6
Vcc[V]
Vcc[V]
IOL[mA]
Fig.6   "H" input voltage   VIH(CSB,SCK,SI,HOLDB,WPB) Fig.7   "L" input voltage   VIL(CSB,SCK,SI,HOLDB,WPB)
Fig.8   "L" output voltage   VOL1 (Vcc=2.5V)
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? 2010 ROHM Co., Ltd. All rights reserved.
4/18
2010.12 - Rev.B
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