 2004 Microchip Technology Inc.

DS21061H-page 3

24C32

TABLE 1-3:

AC CHARACTERISTICS

FIGURE 1-2:

BUS TIMING DATA

Parameter

Symbol

STD. MODE

FAST MODE

Units

Remarks

Min

Max

Min

Max

Clock frequency

—100

—400

kHz

Clock high time

4000

—

600

—

ns

Clock low time

4700

—

1300

—

ns

SDA and SCL rise time

—

1000

—

300

ns

(Note 1)

SDA and SCL fall time

—

300

—

300

ns

(Note 1)

START condition hold time

4000

—

600

—

ns

After this period the first clock

pulse is generated

START condition setup time

4700

—

600

—

ns

Only relevant for repeated

START condition

Data input hold time

0—0—

ns

Data input setup time

250

—

100

—

ns

STOP condition setup time

4000

—

600

—

ns

Output valid from clock

—

3500

—

900

ns

(Note 2)

Bus free time

4700

—

1300

—

ns

Time the bus must be free

before a new transmission can

start

—

250

20 + 0.1

250

ns

≤ 100 pF

Input filter spike suppres-

sion (SDA and SCL pins)

—

50

—

50

ns

(Note 3)

Write cycle time

—

5

—

5

ms/page (Note 4)

Endurance

High Endurance Block

Rest of Array

—

—

10M

1M

—

—

10M

1M

—

—

cycles

25°C, Vcc = 5.0V, Block Mode

(Note 5)

Note 1: Not 100 percent tested. CB = total capacitance of one bus line in pF.

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: The times shown are for a single page of 8 bytes. Multiply by the number of pages loaded into the write

cache for total time.

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

application, please consult the Total Endurance Model which can be obtained on our website.

SCL

SDA

IN

SDA

OUT