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CAT24WC257LI-1.8TE13 Datasheet(PDF) 3 Page - Catalyst Semiconductor

No. de pieza CAT24WC257LI-1.8TE13
Descripción Electrónicos  256K-Bit I2C Serial CMOS EEPROM
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Fabricante Electrónico  CATALYST [Catalyst Semiconductor]
Página de inicio  http://www.catalyst-semiconductor.com
Logo CATALYST - Catalyst Semiconductor

CAT24WC257LI-1.8TE13 Datasheet(HTML) 3 Page - Catalyst Semiconductor

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CAT24WC257
3
Doc. No. 1030, Rev. E
Power-Up Timing (2)(3)
Symbol
Parameter
Min
Typ
Max
Units
tPUR
Power-Up to Read Operation
1
ms
tPUW
Power-Up to Write Operation
1
ms
Note:
(1) AC measurement conditions:
RL (connects to VCC): 0.3VCC to 0.7 VCC
Input rise and fall times: < 50ns
Input and output timeing reference voltages: 0.5 VCC
(2) This parameter is tested initially and after a design or process change that affects the parameter.
(3) tPUR and tPUW are the delays required from the time VCC is stable until the specified operation can be initiated.
The write cycle time is the time from a valid stop
condition of a write sequence to the end of the internal
program/erase cycle. During the write cycle, the bus
interface circuits are disabled, SDA is allowed to remain
high, and the device does not respond to its slave
address.
A.C. CHARACTERISTICS
VCC = +1.8V to +6V, unless otherwise specified
Output Load is 1 TTL Gate and 100pF
Read & Write Cycle Limits
Symbol
Parameter
VCC=1.8V - 6.0V VCC=2.5V - 6.0V VCC=3.0V - 5.5V
Min
Max
Min
Max
Min
Max
Units
FSCL
Clock Frequency
100
400
1000
kHz
tAA
SCL Low to SDA Data Out
0.1
3.5
0.05
0.9
0.05
0.55
µs
and ACK Out
tBUF(1)
Time the Bus Must be Free Before
4.7
1.2
0.5
µs
a New Transmission Can Start
tHD:STA
Start Condition Hold Time
4.0
0.6
0.25
µs
tLOW
Clock Low Period
4.7
1.2
0.6
µs
tHIGH
Clock High Period
4.0
0.6
0.4
µs
tSU:STA
Start Condition Setup Time
4.0
0.6
0.25
µs
(for a Repeated Start Condition)
tHD:DAT
Data In Hold Time
0
0
0
ns
tSU:DAT
Data In Setup Time
100
100
100
ns
tR(1)
SDA and SCL Rise Time
1.0
0.3
0.3
µs
tF(1)
SDA and SCL Fall Time
300
300
100
ns
tSU:STO
Stop Condition Setup Time
4.7
0.6
0.25
µs
tDH
Data Out Hold Time
100
50
50
ns
tWR
Write Cycle Time
10
10
10
ms


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