M24C02-125 datasheet(8/30 Pages) STMICROELECTRONICS

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Signal description

M24C16-125 M24C08-125 M24C04-125 M24C02-125

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Doc ID 022564 Rev 1

2.4

Supply voltage (VCC)

2.4.1

Operating supply voltage VCC

Prior to selecting the memory and issuing instructions to it, a valid and stable VCC voltage

within the specified [VCC(min), VCC(max)] range must be applied (see Operating conditions

in Section 6: DC and AC parameters). In order to secure a stable DC supply voltage, it is

recommended to decouple the VCC line with a suitable capacitor (usually of the order of 10

nF to 100 nF) close to the VCC/VSS 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 (tW).

2.4.2

Power-up conditions

The VCC voltage has to rise continuously from 0 V up to the minimum VCC operating voltage

defined in Operating conditions in Section 6: DC and AC parameters and the rise time must

not vary faster than 1 V/µs.

2.4.3

Device reset

In order to prevent inadvertent write operations during power-up, a power-on-reset (POR)

circuit is included. At power-up (continuous rise of VCC), the device does not respond to any

instruction until VCC reaches the power-on-reset threshold voltage (this threshold is lower

than the minimum VCC operating voltage defined in Operating conditions in Section 6: DC

and AC parameters). When VCC passes over the POR threshold, the device is reset and

enters the Standby Power mode. The device, however, must not be accessed until VCC

reaches a valid and stable VCC voltage within the specified [VCC(min), VCC(max)] range.

In a similar way, during power-down (continuous decrease in VCC), as soon as VCC drops

below the power-on-reset threshold voltage, the device stops responding to any instruction

sent to it.

2.4.4

Power-down conditions

During power-down (continuous decrease in VCC), the device must be in the Standby Power

mode (mode reached after decoding a Stop condition, assuming that there is no internal

write cycle in progress).

M24C02-125 Datasheet(PDF) 8 Page - STMicroelectronics