ACE24C02A Datasheet, PDF (5/14 Pages) ACE Technology Co., LTD. – Two-wire Serial EEPROM

Technology
ACE24C02A
Two-wire Serial EEPROM
T_HD.DAT
T_SU.DAT
T_R
T_F
T_SU.STO
T_DH
T_WR
Endurance⁽¹⁾
Data In Hold Time
Data In Setup Time
Inputs Rise Time
Inputs Fall Time
Stop Setup Time
Data Out Hold Time
Write Cycle Time
5.0V, 25℃, Page Mode
Notes:1. This parameter is characterized and not 100% tested.
2.AC measurement conditions:
RL (connects to Vcc): 1.3kΩ (2.5V, 5.5V), 10kΩ (1.7V)
Input pulse voltages: 0.3 Vcc to 0.7 Vcc
Input rise and fall times: ≦50 ns
Input and output timing reference voltages: 0.5Vcc
0
0
0
µs
100
100
100
ns
0.3
0.3
0.3 µs
300
100
100 ns
0.6
0.25
0.25
µs
50
50
50
ns
5
5
5 ms
1,000,000
Write
Cycles
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 (refer to Figure 4). Data changes during 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 (refer to Figure 5).
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 (refer to Figure 5).
Acknowledge:
All addresses and data words are serially transmitted to and from the EEPROM in 8-bit words. The
EEPROM sends a zero during the ninth clock cycle to acknowledge that it has received each word. The
happens during the ninth clock cycle. Following receipt each word from the EEPROM, the
microcontroller should send a zero to EEPROM and continue to output the next data word or send a
stop condition to finish the read cycle.
Standby Mode :
The ACE24C02A 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.
VER 1.2 5