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PDF AT24C01B Data sheet ( Hoja de datos )
| Número de pieza | AT24C01B | |
| Descripción | 2-Wire Automotive Temperature Serial EEPROM | |
| Fabricantes | ATMEL Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AT24C01B (archivo pdf) en la parte inferior de esta página. Total 18 Páginas | ||
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NOT RECOMMENDED
FOR NEW DESIGNS
Replaced by
AT24C01C,
AT24C02C,
AT24C04C,
or AT24C08C
AT24C01B, AT24C02B
AT24C04B, AT24C08B
2-Wire Automotive Temperature Serial EEPROM
1K (128 x 8), 2K (256 x 8), 4K (512 x 8), or 8K (1,024 x 8)
Features
DATASHEET
Medium-voltage and Standard-voltage Operation
̶ 2.5V (VCC = 2.5V to 5.5V)
Automotive Temperature Range –40C to 125C
Internally Organized 128 x 8 (1K), 256 x 8 (2K), 512 x 8 (4K), or 1,024 x 8 (8K)
2-Wire Serial Interface
Schmitt Trigger, Filtered Inputs for Noise Suppression
Bidirectional Data Transfer Protocol
400kHz (2.5V) Compatibility
Write Protect Pin for Hardware Data Protection
8-byte Page (1K, 2K) or 16-byte Page (4K, 8K) Write Modes
Partial Page Writes are Allowed
Self-timed Write Cycle (5ms max)
High-reliability
̶ Endurance: 1,000,000 Write Cycles
̶ Data Retention: 100 Years
8-lead JEDEC SOIC and 8-lead TSSOP Packages
Description
The AT24C01B/02B/04B/08B Automotive provides 1,024/2,048/4,096/8,192 bits
of Serial Electrically Erasable and Programmable Read-only Memory (EEPROM)
organized as 128/256/512/1,024 words of 8 bits each. The device is optimized for
use in many automotive applications where low-power and low-voltage operation
are essential. The AT24C01B/02B/04B/08B Automotive is available in space-
saving 8-lead JEDEC SOIC and 8-lead TSSOP packages and is accessed via a
2-wire serial interface. In addition, the entire family operates at voltages from 2.5V
to 5.5V.
Atmel-8517D-SEEPROM-AT24C01B-02B-04B-08B-Auto-Datasheet_082014
1 page  
6. Device Operation
Clock and Data Transitions: The SDA pin is normally pulled high with an external device. Data on the SDA pin
may change only during SCL low time periods. Data changes during SCL high periods will indicate a Start or
Stop condition as defined below.
Figure 6-1. Data Validity
SDA
SCL
Data Stable
Data Stable
Data
Change
Start Condition: A high-to-low transition of SDA with SCL high is a Start condition which must precede any
other command.
Stop Condition: A low-to-high transition of SDA with SCL high is a Stop condition. After a read sequence, the
Stop command will place the EEPROM in a standby power mode.
Figure 6-2. Start and Stop Definition
SDA
SCL
Start
Stop
AT24C01B/02B/04B/08B Automotive [DATASHEET]
Atmel-8517D-SEEPROM-AT24C01B-02B-04B-08B-Auto-Datasheet_082014
5
5 Page 
Sequential Read: Sequential Reads are initiated by either a Current Address Read or a random address read.
After the microcontroller receives a data word, it responds with an acknowledge. As long as the EEPROM
receives an acknowledge, it will continue to increment the data word address and serially clock out sequential
data words. When the memory address limit is reached, the data word address will roll-over and the Sequential
Read will continue. The Sequential Read operation is terminated when the microcontroller does not respond
with a zero but does generate a following Stop condition.
Figure 9-3. Sequential Read
Device
Address
R
E
A
D
SDA Line
RA
/C
WK
Data (n)
Data (n + 1)
Data (n + 2)
Data (n + x)
S
T
O
P
AA A N
CC C O
KK
K
A
C
K
10. Power Recommendation
The device internal POR (Power-On Reset) threshold is just below the minimum operating voltage of the device.
Power shall rise monotonically from 0.0Vdc to full VCC in less than 1ms. Hold at full VCC for at least 100μs before
the first operation. Power shall drop from full VCC to 0.0Vdc in less than 1ms. Power dropping to a non-zero level
and then slowly going to zero is not recommended. Power shall remain off (0.0Vdc) for 0.5s minimum. Please
consult Atmel if your power conditions do not meet the above recommendations.
AT24C01B/02B/04B/08B Automotive [DATASHEET]
Atmel-8517D-SEEPROM-AT24C01B-02B-04B-08B-Auto-Datasheet_082014
11
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet AT24C01B.PDF ] | |
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