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PDF R1EX24256BSAS0I Data sheet ( Hoja de datos )
| Número de pieza | R1EX24256BSAS0I | |
| Descripción | Two-wire serial interface 256k EEPROM | |
| Fabricantes | Renesas Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de R1EX24256BSAS0I (archivo pdf) en la parte inferior de esta página. Total 18 Páginas | ||
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R1EX24256BSAS0I
R1EX24256BTAS0I
Two-wire serial interface
256k EEPROM (32-kword × 8-bit)
Datasheet
R10DS0007EJ0100
Rev.1.00
Aug. 04, 2010
Description
R1EX24xxx series are two-wire serial interface EEPROM (Electrically Erasable and Programmable ROM). They
realize high speed, low power consumption and a high level of reliability by employing advanced MONOS memory
technology and CMOS process and low voltage circuitry technology. They also have a 64-byte page programming
function to make their write operation faster.
Features
• Single supply: 1.8 V to 5.5 V
• Two-wire serial interface (I2C serial bus)
• Clock frequency: 400 kHz
• Power dissipation:
Standby: 2 µA (max)
Active (Read): 1 mA (max)
Active (Write): 3 mA (max)
• Automatic page write: 64-byte/page
• Write cycle time: 5 ms
• Endurance: 1,000k Cycles @ 25°C
• Data retention: 100 Years @ 25°C
• Small size packages: SOP-8pin, TSSOP-8pin
• Shipping tape and reel
TSSOP 8-pin: 3,000 IC/reel
SOP 8-pin: 2,500 IC/reel
• Temperature range: −40 to +85°C
• Lead free products.
R10DS0007EJ0100 Rev.1.00
Aug. 04, 2010
www.DataSheet.in
Page 1 of 16
1 page  
R1EX24256BSAS0I/R1EX24256BTAS0I
Timing Waveforms
Bus Timing
SCL
SDA
(in)
SDA
(out)
WP
tF
tSU.STA
tHD.STA
tAA
tSU.WP
1/fSCL
tHIGH
tLOW
tHD.DAT
tSU.DAT
tDH
tR
tSU.STO
tBUF
tHD.WP
Write Cycle Timing
Stop condition
Start condition
SCL
SDA
D0 in
Write data
(Address (n))
ACK
tWC
(Internally controlled)
R10DS0007EJ0100 Rev.1.00
Aug. 04, 2010
www.DataSheet.in
Page 5 of 16
5 Page 
R1EX24256BSAS0I/R1EX24256BTAS0I
Acknowledge Polling:
Acknowledge polling feature is used to show if the EEPROM is in a internally-timed write cycle or not. This feature is
initiated by the stop condition after inputting write data. This requires the 8-bit device address word following the start
condition during a internally-timed write cycle. Acknowledge polling will operate when the R/W code = “0”.
Acknowledgment “1” (no acknowledgment) shows the EEPROM is in a internally-timed write cycle and
acknowledgment “0” shows that the internally-timed write cycle has completed. See Write Cycle Polling using ACK.
Write Cycle Polling Using ACK
Send
write command
Send
stop condition
to initiate write cycle
Send
start condition
Send
device address word
with R/W = 0
ACK
returned
Yes
Next operation is
addressing the memory
Yes
Send
memory address
No
No
Send
start condition
Send
stop condition
Proceed write operation
Proceed random address
read operation
Send
stop condition
R10DS0007EJ0100 Rev.1.00
Aug. 04, 2010
www.DataSheet.in
Page 11 of 16
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet R1EX24256BSAS0I.PDF ] | |
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