5

5279C–SEEPR–3/09

AT24C256B

Notes: 1. This parameter is ensured by characterization and is not 100% tested.

2. AC measurement conditions:

Input rise and fall times:

≤ 50 ns

Table 3-3.

AC Characteristics (Industrial Temperature)

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

Symbol

Parameter

1.8-volt

2.5, 5.0-volt

Units

Min

Max

Min

Max

Clock Frequency, SCL

400

1000

kHz

Clock Pulse Width Low

1.3

0.4

µs

Clock Pulse Width High

0.6

0.4

µs

100

50

ns

Clock Low to Data Out Valid

0.05

0.9

0.05

0.55

µs

Time the bus must be free before a

new transmission can start(1)

1.3

0.5

µs

Start Hold Time

0.6

0.25

µs

Start Set-up Time

0.6

0.25

µs

Data In Hold Time

0

0

µs

Data In Set-up Time

100

100

ns

Inputs Rise Time(1)

0.3

0.3

µs

Inputs Fall Time(1)

300

100

ns

Stop Set-up Time

0.6

0.25

µs

Data Out Hold Time

50

50

ns

Write Cycle Time

5

5

ms

Endurance(1)

25°C, Page Mode, 3.3V

1,000,000

Write

Cycles