AT24MAC402-SSHM-T Atmel, AT24MAC402-SSHM-T Datasheet - Page 8

• Manufacturer Part Number: AT24MAC402-SSHM-T
• Description: EEPROM 2-Kbit Serial EEPROM
• Manufacturer: Atmel

Specifications of AT24MAC402-SSHM-T

• Rohs: yes
• Memory Size: 2 Kbit
• Organization: 256 B x 8
• Data Retention: 100 yr
• Maximum Clock Frequency: 1000 KHz
• Maximum Operating Current: 6 uA
• Operating Supply Voltage: 1.7 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SOIC-8

4.
Device Operation
Clock and Data Transitions: The SDA pin is normally pulled high with an external component such as a pull-up resistor.
Data on the SDA pin may change only during SCL low time periods (see
SCL high periods will indicate a Start or Stop condition as defined 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
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 AT24MAC402/602 features a low-power standby mode which is enabled upon
2-Wire Software Reset: After an interruption in protocol, power loss or system reset, any 2-wire part can be reset by
following these steps:
Figure 4-1. Software Reset
Figure 4-2. Bus Timing
SCL Serial Clock, SDA: Serial Data I/O
SDA OUT


1.
2.
3.
SDA
SCL
SDA IN
SCL
Power-up or
After the receipt of the Stop bit and the completion of any internal operations.
Create a start bit condition.
Clock nine cycles.
Create another start bit followed by Stop bit condition as shown below.
Start
Figure 4-5 on page
Bit
1
9).
2
Dummy Clock Cycles
Atmel AT24MAC402/602 [PRELIMINARY DATASHEET]
3
Figure 4-5 on page
8
Figure 4-4 on page
9
9).
9). Data changes during
Start
Bit
8807B–SEEPR–9/2012
Stop
Bit
8