© 2005 Microchip Technology Inc.

DS21166J-page 3

24AA52/24LCS52

TABLE 1-2:

AC SPECIFICATIONS

AC CHARACTERISTICS

Param.

No.

Symbol

Characteristic

Min

Typ

Max

Units

Conditions

Clock frequency

—

—

—

—

400

100

kHz

2.2V

1.8V

Clock high time

600

4000

—

—

—

—

ns

2.2V

1.8V

Clock low time

1300

4700

—

—

—

—

ns

2.2V

1.8V

SDA and SCL rise time

(Note 1)

—

—

—

—

300

1000

ns

2.2V

1.8V

SDA and SCL fall time

—

—

—

300

ns

(Note 1)

Start condition hold time

600

4000

—

—

—

—

ns

2.2V

1.8V

Start condition setup

time

600

4700

—

—

—

—

ns

2.2V

1.8V

Data input hold time

0

—

—

—ns

(Note 2)

Data input setup time

100

250

—

—

—

—

ns

2.2V

1.8V

10

Stop condition setup

time

600

4000

—

—

—

—

ns

2.2V

1.8V

11

Output valid from clock

(Note 2)

—

—

—

—

900

3500

ns

2.2V

1.8V

12

Bus free time: Time the

bus must be free before

a new transmission can

start

1300

4700

—

—

—

—

ns

2.2V

1.8V

13

maximum

—

—

—

250

250

ns

2.2V

1.8V

14

Input filter spike

suppression

(SDA and SCL pins)

—

—

50

ns

(Note 1 and Note 3)

15

Write cycle time

(byte or page)

——

5

ms

—

16

—

Endurance

1M

—

—

cycles

mode (Note 4)

2: As a transmitter, the device must provide an internal minimum delay time to bridge the undefined region

(minimum 300 ns) of the falling edge of SCL to avoid unintended generation of Start or Stop conditions.

4: This parameter is not tested but ensured by characterization. For endurance estimates in a specific

application, please consult the Total Endurance™ Model which can be obtained from Microchip’s web site

at www.microchip.com.