AT24C01B-TH-T Atmel, AT24C01B-TH-T Datasheet - Page 6

• Manufacturer Part Number: AT24C01B-TH-T
• Description: IC EEPROM 1KBIT 1MHZ 8TSSOP
• Manufacturer: Atmel

Specifications of AT24C01B-TH-T

• Format - Memory: EEPROMs - Serial
• Memory Type: EEPROM
• Memory Size: 1K (128 x 8)
• Speed: 400kHz, 1MHz
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3. Device Operation
6
SCL
SDA
AT24C01B
Start bit
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 (see
page
below.
START CONDITION: A high-to-low transition of SDA with SCL high is a start condition which
must precede any other command (see
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 (see
ure 5-3 on page
ACKNOWLEDGE: All addresses and data words are serially transmitted to and from the
EEPROM in 8-bit words. The EEPROM sends a zero to acknowledge that it has received each
word. This happens during the ninth clock cycle.
STANDBY MODE: The AT24C01B features a low-power standby mode which is enabled: (a)
upon power-up and (b) after the receipt of the STOP bit and the completion of any internal
operations.
2-WIRE SOFTWARE RESET: After an interruption in protocol, power loss or system reset, any
2-wire part can be protocol reset by following these steps: (a) Create a start bit condition, (b)
Clock 9 cycles, (c) Create another start bit followed by a stop bit condition as shown below. The
device is ready for next communication after above steps have been completed.
1
8). Data changes during SCL high periods will indicate a start or stop condition as defined
2
8).
Dummy Clock Cycles
3
Figure 5-3 on page
8
9
8).
Start bit
5156E–SEEPR–10/08
Stop bit
Figure 5-2 on
Fig-