ACE24AC256E

Two-wire Serial EEPROM

VER 1.1

9

Electrical Specifications

A.

Power-Up Requirements

During a power-up sequence, the VCC supplied to the device should monotonically rise from GND to

the minimum VCC level, with a slew rate no faster than 0.05 V/μs and no slower then 0.1 V/ms. A

decoupling cap should be connected to the VCC PAD which is no smaller than 10nF.

B.

Device Reset

To prevent inadvertent write operations or any other spurious events from occurring during a power-

up sequence, this device includes a Power-on Reset (POR) circuit. Upon power-up, the device will

not respond to any commands until the VCC level crosses the internal voltage threshold (VPOR) that

brings the device out of Reset and into Standby mode. The system designer must ensure the

instructions are not sent to the device until the VCC supply has reached a stable value greater than

or equal to the minimum VCC level.

Figure 9: Power on and Power down

If an event occurs in the system where the VCC level supplied to the device drops below the

power-up sequence in compliance with the requirements defined in this section.