S-24C08C Datasheet, PDF (24/33 Pages) Seiko Instruments Inc – Write protect function during the low power supply voltage

2-WIRE SERIAL E²PROM
S-24C08C (WLP PRODUCT)
Rev.1.0_00_H
5.0
4.0
Power Supply Voltage (V_CC)
[V]
3.0
2.0
50 100 150 200
Rise Time (t_RISE) max.
[ms]
For example: If the supply voltage = 5.0 V, raise the power supply voltage to 5.0 V within 200 ms.
Figure 25 Rise Time of Power Supply Voltage
When initialization is successfully completed by the power-on-clear circuit, the S-24C08C enters the standby
status.
If the power-on-clear circuit does not operate;
The S-24C08C has not completed initialization, an instruction previously input is still valid or an instruction may be
inappropriately recognized. In this case, S-24C08C may perform the Write operation.
The voltage drops due to power off while the S-24C08C is being accessed. Even if the master device is reset due
to the low power voltage, the S-24C08C may malfunction unless the power-on-clear operation conditions of
S-24C08C are satisfied.
When not using this rise time seen in Figure 25, adjust the phase (reset) to reset the internal circuit in the
S-24C08C normally.
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