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PDF ( 数据手册 , 数据表 ) ST24E16

零件编号 ST24E16
描述 (ST24E16 / ST25E16) 16 Kbit Serial I2C EEPROM with Extended Addressing
制造商 ST Microelectronics
LOGO ST Microelectronics LOGO 


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ST24E16 数据手册, 描述, 功能
ST24E16
ST25E16
16 Kbit Serial I2C EEPROM with Extended Addressing
COMPATIBLE with I2C EXTENDED
ADDRESSING
TWO WIRE SERIAL INTERFACE,
SUPPORTS 400kHz PROTOCOL
1 MILLION ERASE/WRITE CYCLES, OVER
the FULL SUPPLY VOLTAGE RANGE
40 YEARS DATA RETENTION
SINGLE SUPPLY VOLTAGE
– 4.5V to 5.5V for ST24E16 version
– 2.5V to 5.5V for ST25E16 version
WRITE CONTROL FEATURE
BYTE and PAGE WRITE (up to 16 BYTES)
BYTE, RANDOM and SEQUENTIAL READ
MODES
SELF TIMED PROGRAMING CYCLE
AUTOMATIC ADDRESS INCREMENTING
ENHANCED ESD/LATCH UP
PERFORMANCES
8
1
PSDIP8 (B)
0.25mm Frame
8
1
SO8 (M)
150mil Width
Figure 1. Logic Diagram
DESCRIPTION
The ST24/25E16 are 16 Kbit electrically erasable
programmable memories (EEPROM), organized
as 8 blocks of 256 x8 bits. It is manufactured in
STMicroelectronics’s Hi-Endurance Advanced
CMOS technology which guarantees an endur-
ance of one million erase/write cycles over the full
supply voltage range, and a data retention of over
40 years. The ST25E16 operates with a power
supply value as low as 2.5V.
Table 1. Signal Names
E0 - E2
SDA
SCL
WC
VCC
VSS
Chip Enable Inputs
Serial Data Address Input/Output
Serial Clock
Write Control
Supply Voltage
Ground
February 1999
VCC
3
E0-E2
SCL
WC
ST24E16
ST25E16
SDA
VSS
AI01102B
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ST24E16 pdf, 数据表
ST24E16, ST25E16
Figure 6. I2C Bus Protocol
SCL
SDA
START
CONDITION
SDA
SDA
INPUT CHANGE
STOP
CONDITION
SCL
SDA
12
MSB
START
CONDITION
3
SCL
SDA
12
MSB
3
789
ACK
789
ACK
STOP
CONDITION
AI00792
Write Operations
Following a START condition the master sends a
device select code with the RW bit reset to ’0’. The
ST24/25E16 acknowledge this and waits for 2
bytes of address. These 2 address bytes (8 bits
each) provide access to any of the 8 blocks of 256
bytes each. Writing in the ST24/25E16 may be
inhibited if input pin WC is taken high.
For the ST24/25E16 versions, any write command
with WC = ’1’ (during a period of time from the
START condition untill the end of the 2 Bytes
Address) will not modify data and will NOT be
acknowledged on data bytes, as in Figure 9.
Byte Write. In the Byte Write mode the master
sends one data byte, which is acknowledged by the
ST24/25E16. The master then terminates the
transfer by generating a STOP condition.
Page Write. The Page Write mode allows up to 16
bytes to be written in a single write cycle, provided
that they are all located in the same row of 16 bytes
in the memory, that is the same Address bits (b10-
b4). The master sends one up to 16 bytes of data,
which are each acknowledged by the ST24/25E16.
After each byte is transfered, the internal byte
address counter (4 Least Significant Bits only) is
incremented. The transfer is terminated by the
master generating a STOP condition. Care must be
taken to avoid address counter ’roll-over’ which
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ST24E16 equivalent, schematic
ST24E16, ST25E16
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted
by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to
change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not
authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics
© 1999 STMicroelectronics - All Rights Reserved
All other names are the property of their respective owners
Purchase of I2C Components by STMicroelectronics, conveys a license under the Philips
I2C Patent. Rights to use these components in an I2C system, is granted provided that the system conforms to
the I2C Standard Specifications as defined by Philips.
STMicroelectronics GROUP OF COMPANIES
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