5
AT24C128/256
0670E–07/01
AC Characteristics
Notes: 1. This parameter is characterized and is not 100% tested.
2. AC measurement conditions:
R
L
(connects to V
CC
): 1.3KΩ (2.5V, 5V), 10KΩ (1.8V)
Input pulse voltages: 0.3V
CC
to 0.7V
CC
Input rise and fall times: ≤50ns
Input and output timing reference voltages: 0.5V
CC
Applicable over recommended operating range from T
A
= -40°C to +85°C, V
CC
= +1.8V to +5.5V, CL = 100 pF (unless oth-
erwise noted). Test conditions are listed in Note 2.
Symbol Parameter
1.8-volt 2.5-volt 5.0-volt
UnitsMin Max Min Max Min Max
f
SCL
Clock Frequency, SCL 100 400 1000 kHz
t
LOW
Clock Pulse Width Low 4.7 1.3 0.6 µs
t
HIGH
Clock Pulse Width High 4.0 1.0 0.4 µs
t
AA
Clock Low to Data Out Valid 0.1 4.5 0.05 0.9 0.05 0.55 µs
t
BUF
Time the bus must be free before a new
transmission can start
(1)
4.7 1.3 0.5 µs
t
HD.STA
Start Hold Time 4.0 0.6 0.25 µs
t
SU.STA
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
t
F
Inputs Fall Time
(1)
300 300 100 ns
t
SU.STO
Stop Set-up Time 4.7 0.6 0.25 µs
t
DH
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 100K 100K 100K
Write
Cycles
