AT24C512B-10PU-1.8 View Datasheet(PDF) - Atmel Corporation
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AT24C512B-10PU-1.8 Datasheet PDF : 18 Pages
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AT24C512B [Preliminary]
Table 4. AC Characteristics (Industrial Temperature)
Applicable over recommended operating range from TAI = −40°C to +85°C, VCC = +1.8V to +3.6V, CL = 100 pF (unless oth-
erwise noted). Test conditions are listed in Note 2.
1.8-volt
2.5-volt
3.6-volt
Symbol
Parameter
Min
Max
Min
Max
Min
Max
Units
fSCL
tLOW
tHIGH
tAA
tBUF
Clock Frequency, SCL
400
1000
1000
kHz
Clock Pulse Width Low
1.3
0.4
0.4
µs
Clock Pulse Width High
0.6
0.4
0.4
µs
Clock Low to Data Out Valid
0.05
0.9
0.05
0.55
0.05
0.55
µs
Time the bus must be free before a
new transmission can start(1)
1.3
0.5
0.5
µs
tHD.STA
tSU.STA
tHD.DAT
tSU.DAT
tR
tF
tSU.STO
tDH
tWR
Endurance(1)
Start Hold Time
Start Set-up Time
Data In Hold Time
Data In Set-up Time
Inputs Rise Time(1)
Inputs Fall Time(1)
Stop Set-up Time
Data Out Hold Time
Write Cycle Time
25°C, Page Mode, 3.3V
0.6
0.25
0.25
µs
0.6
0.25
0.25
µs
0
0
0
µs
100
100
100
ns
0.3
0.3
0.3
µs
300
100
100
ns
0.6
0.25
0.25
µs
50
50
50
ns
5
5
5
ms
1,000,000
Write
Cycles
Notes:
1. This parameter is characterized and is not 100% tested.
2. AC measurement conditions:
RL (connects to VCC): 1.3 kΩ (2.5V, 3.6V), 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
Device Operation
CLOCK and DATA TRANSITIONS: The SDA pin is normally pulled high with an exter-
nal device. Data on the SDA pin may change only during SCL low time periods (see
Figure 4 on page 7). Data changes during SCL high periods will indicate a start or stop
condition as defined below.
START CONDITION: A high-to-low transition of SDA with SCL high is a start condition
which must precede any other command (see Figure 5 on page 7).
STOP CONDITION: A low-to-high transition of SDA with SCL high is a stop condition.
After a read sequence, the stop command will place the EEPROM in a standby power
mode (see Figure 5 on page 7).
ACKNOWLEDGE: All addresses and data words are serially transmitted to and from the
EEPROM in 8-bit words. The EEPROM sends a zero during the ninth clock cycle to
acknowledge that it has received each word.
5
5112A–SEEPR–8/05
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