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PDF X24C01AS8I Data sheet ( Hoja de datos )

Número de pieza X24C01AS8I
Descripción Serial E2PROM
Fabricantes Xicor 
Logotipo Xicor Logotipo



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XPr2e4liCm0in1aAry Information
1K
X24C01A
128 x 8 Bit
Serial E2PROM
FEATURES
2.7V 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
New Hardwire – Write Control Function
DESCRIPTION
The X24C01A is a CMOS 1024 bit serial E2PROM,
internally organized 128 x 8. The X24C01A features a
serial interface and software protocol allowing 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. Available in an eight
pin DIP and SOIC package.
FUNCTIONAL DIAGRAM
(8) VCC
(4) VSS
(7) WC
(5) SDA
START
STOP
LOGIC
START CYCLE
H.V. GENERATION
TIMING
& CONTROL
(6) SCL
(3) A2
(2) A1
(1) A0
SLAVE ADDRESS
REGISTER
+COMPARATOR
CONTROL
LOGIC
LOAD
INC
WORD
ADDRESS
COUNTER
R/W
DOUT
ACK
PIN
XDEC
E2PROM
32x32
YDEC
8
CK DATA REGISTER DOUT
3841 FHD F01
© Xicor, 1991 Patents Pending
3841-1
1 Characteristics subject to change without notice

1 page




X24C01AS8I pdf
X24C01A
Page Write
The X24C01A is capable of an four byte page write
operation. It is initiated in the same manner as the byte
write operation, but instead of terminating the write cycle
after the first data word is transferred, the master can
transmit up to three more words. After the receipt of each
word, the X24C01A will respond with an acknowledge.
After the receipt of each word, the two low order address
bits are internally incremented by one. The high order
five bits of the address remain constant. If the master
should transmit more than four words prior to generating
the stop condition, the address counter will “roll over”
and the previously written data will be overwritten. As
with the byte write operation, all inputs are disabled until
completion of the internal write cycle. Refer to Figure 6
for the address, acknowledge and data transfer
sequence.
Acknowledge Polling
The disabling of the inputs, during the internal write
operation, can be used to take advantage of the typical
5 ms write cycle time. Once the stop condition is issued
to indicate the end of the host’s write operation the
X24C01A initiates the internal write cycle. ACK polling
can be initiated immediately. This involves issuing the
start condition followed by the slave address for a write
operation. If the X24C01A is still busy with the write
operation no ACK will be returned. If the X24C01A has
completed the write operation an ACK will be returned
and the master can then proceed with the next read or
write operation (See Flow 1).
READ OPERATIONS
Read operations are initiated in the same manner as
write operations with the exception that the R/W bit of the
slave address is set to a one. There are three basic read
operations: current address read, random read and
sequential read.
It should be noted that the ninth clock cycle of the read
operation is not a “don’t care.” To terminate a read
operation, the master must either issue a stop condition
during the ninth cycle or hold SDA HIGH during the ninth
clock cycle and then issue a stop condition.
Flow 1. ACK Polling Sequence
WRITE OPERATION
COMPLETED
ENTER ACK POLLING
ISSUE
START
ISSUE SLAVE
ADDRESS AND R/W = 0
ACK
NO
RETURNED?
YES
NEXT
OPERATION
A WRITE?
YES
NO
ISSUE BYTE
ADDRESS
PROCEED
ISSUE STOP
ISSUE STOP
PROCEED
3841 FHD F11
5

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X24C01AS8I arduino
X24C01A
PACKAGING INFORMATION
8-LEAD PLASTIC DUAL IN-LINE PACKAGE TYPE P
0.430 (10.92)
0.360 (9.14)
PIN 1 INDEX
PIN 1
0.300
(7.62) REF.
0.260 (6.60)
0.240 (6.10)
0.060 (1.52)
0.020 (0.51)
HALF SHOULDER WIDTH ON
ALL END PINS OPTIONAL
SEATING
PLANE
0.150 (3.81)
0.125 (3.18)
0.110 (2.79)
0.090 (2.29)
0.145 (3.68)
0.128 (3.25)
0.025 (0.64)
0.015 (0.38)
0.065 (1.65)
0.045 (1.14)
0.020 (0.51)
0.016 (0.41)
0.015 (0.38)
MAX.
TYP. 0.010 (0.25)
0.325 (8.25)
0.300 (7.62)
0°
15°
NOTE:
1. ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS)
2. PACKAGE DIMENSIONS EXCLUDE MOLDING FLASH
11

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