AT24C01C datasheet(12/45 Pages) MICROCHIP

12 / 45 page

4.5.1.1

Device Reset

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

sequence, the AT24C01C/AT24C02C 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. Additionally, once the VCC is

greater than or equal to the minimum VCC level, the bus master must wait at least tPUP before sending the

first command to the device. See Table 4-4 for the values associated with these power-up parameters.

Table 4-4. Power-up Conditions(1)

Symbol

Parameter

Min. Max. Units

tPUP

Time required after VCC is stable before the device can accept commands 100

－

µs

VPOR

Power-on Reset Threshold Voltage

－

1.5

tPOFF

Minimum time at VCC = 0V between power cycles

500

－

Note:

These parameters are characterized but they are not 100% tested in production.

If an event occurs in the system where the VCC level supplied to the AT24C01C/AT24C02C drops below

the maximum VPOR level specified, it is recommended that a full power cycle sequence be performed by

first driving the VCC pin to GND, waiting at least the minimum tPOFF time and then performing a new

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

4.5.2

Pin Capacitance

Table 4-5. Pin Capacitance(1)

Symbol

Test Condition

Max.

Units

Conditions

CI/O

Input/Output Capacitance (SDA)

VI/O = 0V

CIN

Input Capacitance (A0, A1, A2 and SCL)

VIN = 0V

Note:

This parameter is characterized but is not 100% tested in production.

4.5.3

EEPROM Cell Performance Characteristics

Table 4-6. EEPROM Cell Performance Characteristics

Operation

Test Condition

Min.

Max.

Units

Write Endurance(1)

TA = 25°C, VCC = 3.3V,

Page Write mode

1,000,000

—

Write Cycles

Data Retention(1)

TA = 55°C

100

—

Years

Note:

Performance is determined through characterization and the qualification process.

AT24C01C/AT24C02C

Electrical Characteristics

Datasheet

DS20006111A-page 12

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