AT24C256B View Datasheet(PDF) - Atmel Corporation
Part Name
Description
MFG CO.
'AT24C256B' PDF : 24 Pages View PDF
AT24C256B
Table 3-3. AC Characteristics (Industrial Temperature)
Applicable over recommended operating range from TAI = − 40°C to +85°C, VCC = +1.8V to +5.5V, CL = 100 pF (unless oth-
erwise noted). Test conditions are listed in Note 2.
1.8-volt
2.5, 5.0-volt
Symbol
Parameter
Min
Max
Min
Max
Units
fSCL
tLOW
tHIGH
ti
tAA
tBUF
Clock Frequency, SCL
400
1000
kHz
Clock Pulse Width Low
1.3
0.4
µs
Clock Pulse Width High
0.6
0.4
µs
Noise Suppression Time(1)
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
tHD.STA
Start Hold Time
0.6
0.25
µs
tSU.STA
Start Set-up Time
0.6
0.25
µs
tHD.DAT
Data In Hold Time
0
0
µs
tSU.DAT
tR
tF
Data In Set-up Time
Inputs Rise Time(1)
Inputs Fall Time(1)
100
100
ns
0.3
0.3
µs
300
100
ns
tSU.STO
Stop Set-up Time
0.6
0.25
µs
tDH
Data Out Hold Time
50
50
ns
tWR
Write Cycle Time
5
5
ms
Endurance(1) 25°C, Page Mode, 3.3V
1,000,000
Write
Cycles
Notes: 1. This parameter is ensured by characterization and is not 100% tested.
2. AC measurement conditions:
RL (connects to VCC): 1.3 kΩ (2.5V, 5.5V), 10 kΩ (1.8V)
Input pulse voltages: 0.3 VCC to 0.7 VCC
Input rise and fall times: ≤ 50 ns
Input and output timing reference voltages: 0.5 VCC
5
5279C–SEEPR–3/09
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