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CAT24C44VI-G

P1-P3P4-P6P7-P9
CAT24C44
7
Doc. No. MD-1083, Rev. T© 2008 SCILLC. All rights reserved.
Characteristics subject to change without notice
RCL/
RECALLRECALL
RECALLRECALL
RECALL
Data is transferred from the EEPROM data memory to
RAM by either sending the RCL instruction or by pulling
the RECALL input pin low. A recall operation must be
performed before the EEPROM store, or RAM write
operations can be executed. Either a hardware or soft-
ware recall operation will set the “previous recall” latch
internal to the CAT24C44.
POWER-ON RECALL
The CAT24C44 has a power-on recall function that
transfers the EEPROM data to the RAM. After Power-
up, all functions are inhibited for at least 200ns (T
pur
)
from stable V
cc
.
STO/
STORESTORE
STORESTORE
STORE
Data in the RAM memory area is stored in the EEPROM
memory either by sending the STO instruction or by
pulling the STORE input pin low. As security against any
inadvertent store operations, the following conditions
must each be met before data can be transferred into
nonvolatile storage:
• The “previous recall” latch must be set (either a
software or hardware recall operation).
• The “write enable” latch must be set (WREN
instruction issued).
• STO instruction issued or STORE input low.
During the store operation, all other CAT24C44 func-
tions are inhibited. Upon completion of the store opera-
tion, the “write enable” latch is reset. The device also
provides false store protection whenever V
CC
falls below
a 3.5V level. If V
CC
falls below this level, the store
operation is disabled and the “write enable” latch is
reset.
Figure 6. Hardware Store Cycle Timing
Figure 5. Recall Cycle Timing
RECALL
t
RCZ
t
ORC
t
RCC
t
RCP
t
ARC
VALID DATA
UNDEFINED DATA
DO
HIGH-Z
STORE
t
ST
t
STP
DO
t
STZ
HIGH-Z
8
CAT24C44
Doc. No. MD-1083, Rev. T
© 2008 SCILLC. All rights reserved.
Characteristics subject to change without notice
Figure 7. Non-Data Operations
SK
CE
DI
12345678
1
XXXX
OP-CODE
ORDERING INFORMATION
Prefix Device # Suffix
24C44 V I T3
Product Number
24C44
G–CAT
Company ID
T: Tape & Reel
3: 3,000/Reel
Package
L: PDIP
V: SOIC, JEDEC
Lead Finish
G: NiPdAu
Blank: Matte-Tin
Temperature Range
I = Industrial (-40°C to +85°C)
E = Extended (-40°C to +125°C)
(4)
Notes:
(1) All packages are RoHS-compliant (Lead-free, Halogen-free).
(2) The device used in the above example is a CAT24C44VI-GT3 (SOIC, Industrial Temperature, NiPdAu, Tape & Reel, 3,000/Reel).
(3) For additional package option please contact your nearest ON Semiconductor Sales office.
(4) Extended Temperature available upon request.
CAT24C44
9
Doc. No. MD-1083, Rev. T© 2008 SCILLC. All rights reserved.
Characteristics subject to change without notice
REVISION HISTORY
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ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to
any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising
out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All
operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights
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intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should
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associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal
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For additional information, please contact your local
Sales Representative
P1-P3P4-P6P7-P9

CAT24C44VI-G

Mfr. #:
Buy CAT24C44VI-G
Manufacturer:
ON Semiconductor
Description:
IC NVSRAM 256 SPI 1MHZ 8SOIC
Lifecycle:
New from this manufacturer.
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