le24c043 ON Semiconductor, le24c043 Datasheet - Page 11

• Manufacturer Part Number: le24c043
• Description: Cmos Ic Two Wire Serial Interface Eeprom 4k Eeprom
• Manufacturer: ON Semiconductor

3) Precautions when turning on the power
Notes:
A. If it is not possible to satisfy the instruction 1 in Note above, and SDA is set to low during power rise
B. If it is not possible to satisfy the instruction 2 in Note above
C. If it is not possible to satisfy the instructions both 1 and 2 in Note above
4) Noise filter for the SCL and SDA pins
5) Function to inhibit writing when supply voltage is low
6) Slave address setting
Power rise time
Power off time
Power bottom voltage
This product contains a power-on reset circuit for preventing the inadvertent writing of data when the power is
turned on. The following conditions must be met in order to ensure stable operation of this circuit. No data
guarantees are given in the event of an instantaneous power failure during the internal write operation.
After the power has stabilized, the steps in A must be executed, then software reset must be executed.
This product does not include a slave address pin, but the information for the slave addresses, S1 and S2, are held
internally. The slave addresses of this product are set to S1=0, and S2=0 when it is shipped. During device
addressing, execute this slave address code after the device code.
1) The SDA pin must be set to high and the SCL pin to low or high.
2) Steps must be taken to ensure that the SDA and SCL pins are not placed in a high-impedance state.
After the power has stabilized, software reset must be executed.
This product contains a filter circuit for eliminating noise at the SCL and SDA pins. Pulses of 100ns or less are not
recognized because of this function.
This product contains a supply voltage monitoring circuit that inhibits inadvertent writing below the guaranteed
operating supply voltage range. The data is protected by ensuring that write operations are not started at voltages
(typ.) of 1.3V and below.
After the power has stabilized, the SCL and SDA pins must be controlled as shown below, with both pins set to high.
V DD
SCL
SDA
Item
V DD
0V
t DH
t LOW
t RISE
t OFF
V bot
t SU.DAT
Symbol
LE24C043
t OFF
V DD
SCL
SDA
min
t RISE
10
V DD =2.7 to 5.5V
typ
Vbot
max
100
0.2
t SU.DAT
unit
ms
ms
V
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