5

AT24C128/256

0670K–SEEPR–7/03

AC Characteristics

Notes:

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

2. AC measurement conditions:

Input rise and fall times:

≤50 ns

Input and output timing reference voltages: 0.5 V

CC

3. The AT24C128/256 bearing the process letter “B” in the package marking (lower right corner on the top side of the package),

guarantees 1 million write cycle endurance (1.8 - 3.6V).

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

t

AA

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

t

SU.DAT

Data In Set-up Time

200

100

100

ns

t

R

Inputs Rise Time

(1)

1.0

0.3

0.3

µs

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

20

10

10

ms

Endurance

(1)

5.0V, 25°C, Page Mode

1,000,000

(3)

Write

Cycles