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BR25S320-W 데이터시트 PDF




ROHM Semiconductor에서 제조한 전자 부품 BR25S320-W은 전자 산업 및 응용 분야에서
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부품번호 BR25S320-W 기능
기능 SPI BUS
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BR25S320-W 데이터시트, 핀배열, 회로
High Reliability Series Serial EEPROMs
SPI BUS
BR25□□□□family
BR25S□□□ Series
No.10001EBT08
□□□Description
BR25S
series is a serial EEPROM of SPI BUS interface method.
Features
1) High speed clock action up to 20MHz (Max.)
2) Wait function by HOLDB terminal
3) Part or whole of memory arrays settable as read only memory area by program
4) 1.75.5V single power source action most suitable for battery use
5) Page write mode useful for initial value write at factory shipment
6) Highly reliable connection by Au pad and Au wire
7) For SPI bus interface (CPOL, CPHA) = (0, 0), (1, 1)
8) Auto erase and auto end function at data rewrite
9) Low current consumption
At write action (5V)
: 1.5mA (Typ.)
At read action (5V)
: 1.0mA (Typ.)
At standby action (5V) : 0.1μA (Typ.)
10) Address auto increment function at read action
11) Write mistake prevention function
Write prohibition at power on
Write prohibition by command code (WRDI)
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Write prohibition by WPB pin
Write prohibition block setting by status registers (BP1, BP0)
Write mistake prevention function at low voltage
12) SOP8/SOP-J8/SSOP-B8/TSSOP-B8/MSOP8/TSSOP-B8J/VSON008X2030 Package
13) Data at shipment Memory array: FFh, status register WPEN, BP1, BP0 : 0
14) Data kept for 40 years
15) Data rewrite up to 1,000,000 times
Page Write
Page
Part Number
32Byte
BR25S320-W
BR25S640-W
64Byte
BR25S128-W
BR25S256-W
BR25S□□□ series
Capacity
Bit format
Power source
voltage
32Kbit 4K×8 1.7V5.5V
64Kbit 8K×8 1.7V5.5V
128Kbit 16K×8 1.7V5.5V
256Kbit 32K×8 1.7V5.5V
SOP8
SOP-J8
SSOP-B8 TSSOP-B8 MSOP8 TSSOP-B8J
● ●● ●
● ●● ●
●●
VSON008
X2030
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
1/18
2010.12 - Rev.B
Datasheet pdf - http://www.DataSheet4U.net/




BR25S320-W pdf, 반도체, 판매, 대치품
BR25S□□□ Series
Technical Note
Pin assignment and description
Vcc HOLDB SCK SI
BR25S320-W
BR25S640-W
BR25S128-W
BR25S256-W
CSB
SO WPB GND
Fig.2 Pin assignment diagram
Sync data input / output timing
Terminal
name
Vcc
GND
CSB
SCK
SI
SO
HOLDB
WPB
Input
/Output
-
-
Input
Input
Input
Output
Input
Input
Function
Power source to be connected
All input / output reference voltage, 0V
Chip select input
Serial clock input
Start bit, ope code, address, and serial data input
Serial data output
Hold input
Command communications may be suspended temporarily
(HOLD status)
Write protect input
Write command is prohibited
Write status register command is prohibited
CSB
SCK
tCS
tSCKS
tCSS
tSCKWL tSCKWH
tDIS tDIH
SI
SO High-Z
Fig.3 Input timing
tRC tFC
SI is taken into IC inside in sync with data rise edge of
SCK. Input address and data from the most significant bit
MSB
tCS
CSB
tCSH tSCKH
SCK
SI
SO
tPD tOH
tRO,tFO tOZ
High-Z
Fig.4 Input / Output timing
SO is output in sync with data fall edge of SCK. Data is
output from the most significant bit MSB.
"H"
CSB
"L"
SCK
tHFS tHFH
SI n+1
SO Dn+1
tHOZ
Dn
tHRS tHRH
High-Z
tDIS
n
tHPD
Dn
HOLDB
Fig.5 HOLD timing
n-1
Dn-1
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AC timing characteristics conditions
Parameter
Symbol
Load capacity
Input rise time
Input fall time
Input voltage
Input / Output judgment voltage
CL
-
-
-
-
Limits
Min. Typ. Max.
- - 30
- - 50
- - 50
0.2Vcc/0.8Vcc
0.3Vcc/0.7Vcc
Unit
pF
ns
ns
V
V
Characteristic data (The following characteristic data are Typ. Values.)
6
Ta=-40℃
5 Ta=25℃
Ta=85℃
4
3
2
1
SPEC
6
Ta=-40℃
5 Ta=25℃
Ta=85℃
4
3
2
1
SPEC
1
Ta=-40℃
0.8 Ta=25℃
Ta=85℃
0.6
SPEC
0.4
0.2
0
0123456
Vcc[V]
0
0123456
Vcc[V]
0
0
Fig.6  "H" input voltage VIH(CSB,SCK,SI,HOLDB,WPB) Fig.7  "L" input voltage VIL(CSB,SCK,SI,HOLDB,WPB)
123456
IOL[mA]
Fig.8 "L" output voltage VOL1 (Vcc=2.5V)
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
4/18
2010.12 - Rev.B
Datasheet pdf - http://www.DataSheet4U.net/

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BR25S320-W 전자부품, 판매, 대치품
BR25S□□□ Series
Technical Note
Features
Status registers
This IC has status register. The status register expresses the following parameters of 8 bits.
BP0 and BP1 can be set by write status register command. These 2 bits are memorized into the EEPROM, therefore are
valid even when power source is turned off.
Rewrite characteristics and data hold time are same as characteristics of the EEPROM.
WEN can be set by write enable command and write disable command. WEN becomes write disable status when power
source is turned off. R/B is for write confirmation, therefore cannot be set externally.
The value of status register can be read by read status register command.
1. Contexture of status register
Product number
bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0
BR25S320-W
BR25S640-W
BR25S128-W
WPEN
0
0
0 BP1 BP0 WEN R/B
BR25S256-W
bit
WPEN
Memory
location
EEPROM
BP1
BP0
EEPROM
WEN
registers
R/B
registers
Function
WPB pin enable / disable designation bit
WPEN=0=invalid
WPEN=1=valid
EEPROM write disable block designation bit
Write and write status register write enable / disable status confirmation bit
WEN=0=prohibited
WEN=1=permitted
Write cycle status (READY / BUSY) status confirmation bit
R/B=0=READY
R/B=1=BUSY
2. Write disable block setting
BP1 BP0 BR25S320-W
00
None
0 1 C00h-FFFh
1 0 800h-FFFh
1 1 000h-FFFh
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Write disable block
BR25S640-W
BR25S128-W
None
None
1800h-1FFFh
3000h-3FFFh
1000h-1FFFh
2000h-3FFFh
0000h-1FFFh
0000h-3FFFh
BR25S256-W
None
6000h-7FFFh
4000h-7FFFh
0000h-7FFFh
WPB pin
By setting WPB=LOW, write command is prohibited. And the write command to be disabled at this moment is WRSR.
However, when write cycle is in execution, no interruption can be made.
Product number
WRSR
WRITE
BR25S320-W
BR25S640-W
BR25S128-W
Prohibition possible
but WPEN bit “1”
Prohibition
impossible
BR25S256-W
HOLDB pin
By HOLDB pin, data transfer can be interrupted. When SCK=”0”, by making HOLDB from “1” into”0”, data transfer to
EEPROM is interrupted. When SCK = “0”, by making HOLDB from “0” into “1”, data transfer is restarted.
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
7/18
2010.12 - Rev.B
Datasheet pdf - http://www.DataSheet4U.net/

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BR25S320-W

SPI BUS

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