5

AT24C128/256

0670S–SEEPR–5/06

Table 4. AC Characteristics – Industrial Temperatures

Notes:

1. This parameter is characterized and is not 100% tested.

2. AC measurement conditions:

R

Input pulse voltages: 0.3 V

Input rise and fall times:

≤ 50 ns

Input and output timing reference voltages: 0.5 V

CC

3. The Write Cycle Time of 5 ms only applies to the AT24C128/256 devices bearing the process letter “B” on the package (the

mark is located in the lower right corner on the top side of the package).

4. The AT24C128/256 bearing the process letter “B” in the package (the mark is located in the lower right corner on the top

side of the package), guarantees 1 million write cycle endurance (1.8 – 3.6V).

Applicable over recommended operating range from T

erwise noted). Test conditions are listed in Note 2.

Symbol

Parameter

1.8-volt

2.5-volt

5.0-volt

Units

Min

Max

Min

Max

Min

Max

Clock Frequency, SCL

100

400

1000

kHz

Clock Pulse Width Low

4.7

1.3

0.4

µs

t

HIGH

Clock Pulse Width High

4.0

0.6

0.4

µs

Clock Low to Data Out Valid

0.1

4.5

0.05

0.9

0.05

0.55

µs

Time the bus must be free before a

new transmission can start(1)

4.7

1.3

0.5

µs

Start Hold Time

4.0

0.6

0.25

µs

Start Set-up Time

4.7

0.6

0.25

µs

t

HD.DAT

Data In Hold Time

0

0

0

µs

Data In Set-up Time

200

100

100

ns

Inputs Rise Time(1)

1.0

0.3

0.3

µs

t

F

Inputs Fall Time(1)

300

300

100

ns

Stop Set-up Time

4.7

0.6

0.25

µs

Data Out Hold Time

100

50

50

ns

t

WR

Write Cycle Time

ms

Endurance(1)

25°C, Page Mode

100k or 1,000,000(4)

Write

Cycles