X24012SI Datasheet PDF - Xicor
| Part Number | X24012SI | |
| Description | Serial E2PROM | |
| Manufacturers | Xicor | |
| Logo |  |
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There is a preview and X24012SI download ( pdf file ) link at the bottom of this page. Total 14 Pages | ||
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Preliminary Information
XP2in4071N2o Connect
1K
X24012
Serial E2PROM
128 x 8 Bit
FEATURES
• 2.7 to 5.5V Power Supply
• Low Power CMOS
—Active Current Less Than 1 mA
—Standby Current Less Than 50 µA
• Internally Organized 128 x 8
• Self Timed Write Cycle
—Typical Write Cycle Time of 5 ms
• 2 Wire Serial Interface
—Bidirectional Data Transfer Protocol
• Four Byte Page Write Operation
—Minimizes Total Write Time Per Byte
• High Reliability
—Endurance: 100,000 Cycles
—Data Retention: 100 Years
DESCRIPTION
The X24012 is a CMOS 1024 bit serial E2PROM,
internally organized as one 128 x 8 bank. The X24012
features a serial interface and software protocol allow-
ing operation on a simple two wire bus. Three address
inputs allow up to eight devices to share a common two
wire bus.
Xicor E2PROMs are designed and tested for applica-
tions requiring extended endurance. Inherent data re-
tention is greater than 100 years. The X24012 is avail-
able in eight pin DIP and SOIC packages.
FUNCTIONAL DIAGRAM
(8) VCC
(4) VSS
(5) SDA
(6) SCL
(3) A2
(2) A1
(1) A0
START
STOP
LOGIC
SLAVE ADDRESS
REGISTER
+COMPARATOR
START CYCLE
CONTROL
LOGIC
LOAD
INC
WORD
ADDRESS
COUNTER
XDEC
H.V. GENERATION
TIMING
& CONTROL
E2PROM
32 X 32
R/W
DOUT
ACK
PIN
YDEC
8
CK DATA REGISTER DOUT
3847 FHD F01
© Xicor, 1991 Patents Pending
3847-1
1 Characteristics subject to change without notice
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X24012
DEVICE ADDRESSING
Following a start condition the master must output the
address of the slave it is accessing. The most significant
four bits of the slave address are the device type
identifier (see Figure 4). For the X24012 this is fixed as
1010[B].
Figure 4. Slave Address
DEVICE TYPE
IDENTIFIER
1 0 1 0 A2 A1 A0 R/W
DEVICE
ADDRESS
3847 FHD F08
The next three significant bits address a particular
device. A system could have up to eight X24012 devices
on the bus (see Figure 10). The eight addresses are
defined by the state of the A0, A1 and A2 inputs.
The last bit of the slave address defines the operation to
be performed. When set to one a read operation is
selected, when set to zero a write operation is selected.
Following the start condition, the X24012 monitors the
SDA bus comparing the slave address being transmit-
ted with its slave address (device type and state of A0,
A1 and A2 inputs). Upon a correct compare the X24012
outputs an acknowledge on the SDA line. Depending on
the state of the R/W bit, the X24012 will execute a read
or write operation.
WRITE OPERATIONS
Byte Write
For a write operation, the X24012 requires a second
address field. This address field is the word address,
comprised of eight bits, providing access to any one of
the 128 words of memory. Note: the most significant bit
is a don’t care. Upon receipt of the word address the
X24012 responds with an acknowledge, and awaits the
next eight bits of data, again responding with an ac-
knowledge. The master then terminates the transfer by
generating a stop condition, at which time the X24012
begins the internal write cycle to the nonvolatile memory.
While the internal write cycle is in progress the X24012
inputs are disabled, and the device will not respond to
any requests from the master. Refer to Figure 5 for the
address, acknowledge and data transfer sequence.
Figure 5. Byte Write
S
T
BBUUSSAACCTTIVIVITITYY:: A
MMAASSTTEERR
R
T
SSDDAALLININEE
S
SLAVE
ADDRESS
WORD
ADDRESS
BXBX2UU24S40S01AA12C2CTTIVIVITITYY::
AA
CC
KK
DATA
S
T
O
P
P
A
C
K
3847 FHD F09
Figure 6. Page Write
S
T
BBUUSSAACCTTIVIVITITYY: : A
MMAASSTTEERR
R
T
SSDDAALLININEE
S
BXBX2U4U2S04S1A02A1C2CTTIVIVITITYY: :
SLAVE
ADDRESS
WORD ADDRESS n
AA
CC
KK
DATA n
DATA n–1
AA
CC
KK
NOTE: In this example n = xxxx 0000 (B); x = 1 or 0
DATA n+3
S
T
O
P
P
A
C
K
3847 FHD F10
5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for X24012SI electronic component. |
| Information | Total 14 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ X24012SI.PDF Datasheet ] | |
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