M24512-125 Datasheet, PDF (8/30 Pages) STMicroelectronics – Automotive 512-Kbit serial IC bus EEPROM

Signal description
M24512-125
2.5
V_SS (ground)
V_SS is the reference for the V_CC supply voltage.
2.6
2.6.1
2.6.2
2.6.3
2.6.4
Supply voltage (V_CC)
Operating supply voltage V_CC
Prior to selecting the memory and issuing instructions to it, a valid and stable V_CC voltage
within the specified [V_CC(min), V_CC(max)] range must be applied (see Operating conditions
in Section 8: DC and AC parameters). In order to secure a stable DC supply voltage, it is
recommended to decouple the V_CC line with a suitable capacitor (usually of the order of 10
nF to 100 nF) close to the V_CC/V_SS package pins.
This voltage must remain stable and valid until the end of the transmission of the instruction
and, for a write instruction, until the completion of the internal write cycle (t_W).
Power-up conditions
The V_CC voltage has to rise continuously from 0 V up to the minimum V_CC operating voltage
(see Operating conditions in Section 8: DC and AC parameters) and the rise time must not
vary faster than 1 V/µs.
Device reset
In order to prevent inadvertent write operations during power-up, a power-on-reset (POR)
circuit is included.
At power-up, the device does not respond to any instruction until V_CC has reached the
internal reset threshold voltage. This threshold is lower than the minimum V_CC operating
voltage (see Operating conditions in Section 8: DC and AC parameters). When V_CC passes
over the POR threshold, the device is reset and enters the Standby Power mode; however,
the device must not be accessed until V_CC reaches a valid and stable DC voltage within the
specified [V_CC(min), V_CC(max)] range (see Operating conditions in Section 8: DC and AC
parameters).
In a similar way, during power-down (continuous decrease in V_CC), the device must not be
accessed when V_CC drops below V_CC(min). When V_CC drops below the power-on-reset
threshold voltage, the device stops responding to any instruction sent to it.
Power-down conditions
During power-down (continuous decrease in V_CC), the device must be in the Standby Power
mode (mode reached after decoding a Stop condition, assuming that is there is no internal
write cycle in progress).
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Doc ID 022650 Rev 1